CN104184982B - Audio/video communication method, system, terminal device and voice and video telephone service centre - Google Patents

Abstract

The present invention is applicable to the technical field of communication, and provides an audio and video communication method, system, terminal equipment and audio and video call service center, the method includes: the first terminal equipment sends a join request to the audio and video call service center, and requests to join in In the home communication terminal list of the audio and video call service center, the second terminal device is included in the home communication terminal list; after establishing an audio and video call with the peer audio and video communication system, the first terminal device completes the collection, encoding and audio recording of audio data. Data receiving, decoding, and playing; the first terminal device selects the second terminal device in the home communication terminal list, so that the second terminal device completes video data collection, encoding and video data reception, decoding, and playing. In the present invention, since the second terminal device is a terminal device with a high-quality or wide-angle camera, the terminal devices in family B can conveniently watch the videos of multiple family members in family A.

Description

Audio and video communication method, system, terminal equipment and audio and video call service center

technical field

The invention belongs to the technical field of communication, and in particular relates to an audio and video communication method, system, terminal equipment and an audio and video call service center.

Background technique

Since the video call was produced, it has been mainly used in corporate video conferencing. With the improvement of electronic technology, information technology and people's living standards, the demand for video/audio calls to replace traditional voice calls is getting stronger and stronger. With the development of communication network technology, bandwidth costs are getting lower and lower, and Fiber To The Home (Fiber To The Home) , FTTH) popularization, video calls in the personal and family consumer markets will also be popularized.

Now there are many smart terminal devices in the family, including smart set-top boxes, multiple portable devices (Portable Devices, PADs), multiple smart phones, etc., and video calls can be realized between any two devices, but at present, during audio and video calls, the terminal The device is often limited to a fixed terminal device, which will lead to the following problems, greatly affecting the user experience and ease of use.

1. The resolution of the mobile terminal video capture device is low, the audio and video inputs between terminals are strongly coupled, there is no combination capability, and the usability is poor.

For mobile communication terminals such as PAD or smart phone, the resolution of the video captured by the front camera is low, generally below the Video Graphics Array (VGA), and the video quality is poor. The other party can't see the video clearly, but to get a higher quality and clearer video, you must use the rear camera, so that you can't see the other party's video. A high-quality home video communication input system can be formed by using the high-definition camera of the set-top box as the video input and the voice input of the mobile terminal as the audio input. However, at present, the audio and video inputs between terminal devices are strongly coupled, and there is no combination capability, and the usability is too poor.

2. As a home video communication video collection, the image collection range of the mobile terminal video collection device is too small.

The camera angle of PAD or smart phone itself is small, and the convenience of holding the device when the mobile terminal is talking makes the camera angle even smaller, so that the other party cannot see the video of other members of the family at the same time during the call.

3. The way of actively joining the video call that has already been carried out is poor in usability.

When using a PAD or smart phone to make a video call, if a member in another room of the home wants to participate in the video call, the member can only run out and hold the terminal device to make a call, or ask him to hang up, and the terminal next to the member calls the other party to make a call. inconvenient.

4. The method of inviting members to join the video call that has been carried out is not easy to use.

When using a PAD or smart phone to make a video call, if you want members in other rooms in the house to participate in the audio and video call, you can only ask the member to come out and hold the terminal device for the call, or ask the other party to hang up and call the terminal device next to the member to start the call again. Calling is very inconvenient.

To solve the above problems, it is required that suitable terminal equipment can be selected according to needs to complete audio collection/video collection, audio receiving and playing/video receiving and playing in audio and video calls during home video calls.

The technical solution of the video call provided by the prior art is shown in Fig. 1. When an audio and video call is made between families, the family of party A has the function of flipping the screen, and the family of party B can also have it, which is ignored in the figure. For party A, after mobile phone A establishes a signaling channel with party B through the public network server, mobile phone A of party A collects audio and video and sends them to mobile phone B of party B through the public network server after encoding. If mobile phone A and the large-screen terminal set-top box are in the home network, mobile phone A receives and renders the audio and video data of party B's mobile phone B through the public network server, and mobile phone A can send the video data received from party B's mobile phone B to Large-screen terminals (such as set-top box TVs) decode and render.

The disadvantages of the existing technical solutions for video calls are:

1. During a video call, the required audio and video collection and transmission are all fixed on one device, making it impossible to choose a high-quality or wide-angle camera in the home to complete video collection for video data collection.

2. During a video call, the user cannot or is inconvenient to watch the videos of other members in the other party's home.

3. During a video call, other members cannot participate in the call during this call, nor can they ask other members of the other party's family to participate in the call together.

Contents of the invention

Embodiments of the present invention provide an audio-video communication method, system, terminal equipment, and audio-video call service center, aiming to solve the problem that audio-video data collection is fixed on the first terminal equipment during audio-video calls in the prior art, so that It is not possible to choose a high-quality or wide-angle camera in the home to complete video collection. When making a video call between home audio and video communication systems, the user cannot or is not convenient to watch the video of other members in the opposite end of the home.

In the first aspect, an audio and video communication method is provided, including:

The first terminal device sends a join request to the audio and video call service center, requesting to be added to the family communication terminal list of the audio and video call service center, and the second terminal device is included in the family communication terminal list;

After establishing an audio and video call with the peer audio and video communication system, the first terminal device completes the collection and encoding of audio data and the reception, decoding, and playback of audio data;

The first terminal device selects the second terminal device in the home communication terminal list, so that the second terminal device completes collection and encoding of video data and reception, decoding and playing of video data.

In a first possible implementation manner of the first aspect, the first terminal device completing the collection and encoding of audio data includes:

The first terminal device collects audio data, adds a time stamp to the audio data, encodes it, and sends it to the audio and video call service center;

The second terminal device completing the collection and encoding of video data includes:

The second terminal device collects video data, adds a time stamp to the video data, encodes it, and sends it to the audio and video call service center.

With reference to the first possible implementation of the first aspect, in the second possible implementation, audio data is collected at the first terminal device, and a time stamp is added to the audio data, encoded and then sent Collecting video data at the audio and video call service center or the second terminal device, adding a time stamp to the video data, encoding and sending to the audio and video call service center, further includes:

Periodic clock synchronization is performed between the first terminal device, the audio and video call service center, and the second terminal device.

In a third possible implementation manner of the first aspect, when the first terminal device finishes collecting and encoding audio data and receiving, decoding, and playing audio data, it further includes:

The first terminal device completes the collection and encoding of video data, and sends the encoded video data to the audio and video call service center.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, when the first terminal device finishes collecting and encoding audio data and receiving, decoding, and playing audio data, Also includes:

The first terminal notifies the audio and video call service center that the first terminal device receives the video data sent by the audio and video call service center, and decodes and plays the video data.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect Implementation manner, in the fifth possible implementation manner, the first terminal device completes the collection and encoding of audio data and the reception, decoding, and playback of audio data, or the first terminal device selects the home communication terminal list In the second terminal device, the second terminal device completes the process of video data collection, encoding and video data reception, decoding, and playing, and also includes:

The first terminal device sends a multi-party call invitation instruction to the audio-video call service center, so that the audio-video call service center notifies a third terminal device to participate in the first terminal device and the audio-video call service center according to the multi-party call invitation instruction. During a call between peer audio and video communication systems;

Or send a request to join the call instruction to the audio and video call service center, so that the audio and video call service center can make the first terminal device join the third terminal device to communicate with the opposite end audio and video according to the request to join the call instruction In a call between systems.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the first terminal device and the third terminal device are mobile terminals with an audio call function, and the second terminal device is a End devices with high-quality or wide-angle cameras.

In the second aspect, an audio and video communication method is provided, including:

The audio and video call service center receives the joining requests sent by the first terminal device and the second terminal device, and adds the first terminal device and the second terminal device to the family communication terminal list;

The audio and video call service center establishes a communication channel between the first terminal device and the peer audio and video communication system;

The audio and video call service center receives the first audio data sent by the first terminal device, and forwards the first audio data to the peer audio and video communication system;

The audio and video call service center receives the second audio data sent by the peer audio and video communication system and forwards the second audio to the first terminal device, so that the first terminal device can decode and play the second audio data. audio data;

The audio and video call service center receives the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list, and forwards the first video data to the peer audio and video communication system;

The audio and video call service center receives the second video data sent by the peer audio and video communication system and forwards the second video to the second terminal device, so that the second terminal device can decode and play the second video data. video data.

In a first possible implementation manner of the second aspect, the first audio data is sent to the audio and video call service center after the first terminal device adds a time stamp to the collected audio data, encodes it, The first video data is sent to the audio and video call service center after the second terminal device adds a time stamp to the collected video data and encodes it.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the audio and video call service center receives the first audio data sent by the first terminal device or receives the first audio data sent by the first terminal device at the receiving second Before the first video data sent by a terminal device from the second terminal device selected in the home communication terminal list, it also includes:

Periodic clock synchronization is performed between the audio and video call service center and the first terminal device and the second terminal device.

In a third possible implementation manner of the second aspect, when the audio and video call service center receives the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list, Also includes:

The audio and video call service center receives the first video data sent by the first terminal device, and forwards the first video data to the peer audio and video communication system.

In a fourth possible implementation manner of the second aspect, the audio and video call service center receives the second video data sent by the terminal device of the peer audio and video communication system and forwards the second video data to the first The second terminal device, so that after the second terminal device decodes and plays the second video data, it further includes:

The audio and video call service center receives the second video data sent by the peer audio and video communication system and forwards the second video data to the first terminal device, so that the first terminal device can decode and play the second video data. Two video data.

In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect or the third possible implementation of the second aspect or the fourth possible implementation of the second aspect Implementation manner, in a fifth possible implementation manner, the audio and video call service center receives the second video data sent by the peer audio and video communication system and forwards the second video to the second terminal device, so that In the process of decoding and playing the second video data by the second terminal device, it also includes:

The audio and video call service center notifies the third terminal device to participate in the call between the first terminal device and the peer audio and video communication system according to the multi-party call invitation instruction sent by the first terminal device; or

The audio and video call service center enables the first terminal device to join the call between the third terminal device and the peer audio and video communication system according to the request to join the call instruction sent by the first terminal device.

In a third aspect, a terminal device is provided, including:

A join request sending unit, configured to send a join request to the audio and video call service center, requesting to be added to the home communication terminal list of the audio and video call service center, and the home communication terminal list includes the second terminal device;

The audio data processing unit is used to complete audio data collection, encoding, and audio data reception, decoding, and playback after establishing an audio and video call with the peer audio and video communication system;

The video device acquisition unit is configured to select a second terminal device in the home communication terminal list, so that the second terminal device completes video data collection, encoding, and video data reception, decoding, and playback.

In a first possible implementation of the third aspect, the audio data processing unit collects audio data, adds a time stamp to the audio data, encodes it, and sends it to the audio and video call service center;

The video device acquisition unit selects the second terminal device in the home communication terminal list, so that the second terminal device collects video data, adds a time stamp to the video data, encodes it, and sends it to the The audio and video call service center.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the terminal device further includes:

A clock synchronization unit, configured to perform periodic clock synchronization with the audio and video call service center and the second terminal device.

In a third possible implementation manner of the third aspect, the terminal device further includes:

The first video data processing unit is used to complete the collection and encoding of video data, and send the encoded video data to the audio and video call service center.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner, the terminal device further includes:

The second video data processing unit is configured to receive the video data sent by the audio and video call service center, and decode and play the video data.

In combination with the third aspect or the first possible implementation of the third aspect or the second possible implementation of the third aspect or the third possible implementation of the third aspect or the fourth possible implementation of the third aspect Implementation manner, in a fifth possible implementation manner, the terminal device further includes:

A multi-party call invitation instruction/request to join call instruction sending unit, configured to send a multi-party call invitation instruction to the audio and video call service center, so that the audio and video call service center can notify a third terminal device to participate according to the multi-party call invitation instruction to the call between the terminal device and the peer audio and video communication system; or

Sending a request to join the call instruction to the audio and video call service center, so that the audio and video call service center can join the terminal device between the third terminal device and the peer audio and video communication system according to the request to join the call instruction in the call.

With reference to the fifth possible implementation of the third aspect, in a sixth possible implementation, the terminal device and the third terminal device are mobile terminals with an audio call function, and the second terminal device has a high-quality Or a wide-angle camera.

In a fourth aspect, an audio and video call service center is provided, and the audio and video call service center includes:

A join request receiving unit, configured to receive join requests sent by the first terminal device and the second terminal device, and add the first terminal device and the second terminal device to the family communication terminal list;

A communication channel establishment unit, configured to establish a communication channel between the first terminal device and the peer audio and video communication system;

A first audio data processing unit, configured to receive the first audio data sent by the first terminal device, and forward the first audio data to the peer audio and video communication system;

The second audio data processing unit is configured to receive the second audio data sent by the peer audio and video communication system and forward the second audio to the first terminal device, so that the first terminal device can decode and play the second audio data;

The first video data processing unit is configured to receive the first video data sent by the second terminal device, and forward the first video data to the peer audio and video communication system;

The second video data processing unit is configured to receive the second video data sent by the peer audio and video communication system and forward the second video to the second terminal device, so that the second terminal device can decode and play the Second video data.

In a first possible implementation manner of the fourth aspect, the first audio data is sent to the audio and video call service center after the first terminal device adds a time stamp to the collected audio data, encodes it, The first video data is sent to the audio and video call service center after the second terminal device adds a time stamp to the collected video data and encodes it.

With reference to the first possible implementation of the first aspect, in a second possible implementation, the audio and video call service center further includes:

A clock synchronization unit, configured to perform periodic clock synchronization with the first terminal device and the second terminal device.

In a third possible implementation manner of the fourth aspect, the first video data processing unit is further configured to receive the first video data sent by the first terminal device, and forward the first video data to the Terminal audio and video communication system.

In a fourth possible implementation manner of the fourth aspect, the second video data processing unit is further configured to receive the second video data sent by the peer end audio and video communication system and forward the second video data to the The first terminal device, so that the first terminal device decodes and plays the second video data.

In combination with the fourth aspect or the first possible implementation of the fourth aspect or the second possible implementation of the fourth aspect or the third possible implementation of the fourth aspect or the fourth possible implementation of the fourth aspect Implementation manner, in a fifth possible implementation manner, the audio and video call service center further includes:

A multi-party call control unit, configured to notify a third terminal device to participate in the call between the first terminal device and the peer audio and video communication system according to the multi-party call invitation instruction sent by the first terminal device; or

According to the request to join call instruction sent by the first terminal device, the first terminal device is added to the call between the third terminal device and the peer audio-video communication system.

In the fifth aspect, an audio and video communication system is provided, the system includes the audio and video call service center as described in any one of the above and the terminal devices as described in any of the above respectively connected to the audio and video call service center, End devices with high-quality or wide-angle cameras.

In the embodiment of the present invention, the first terminal device may select the second terminal device, and the second terminal device replaces the first terminal device to complete video data collection, encoding, and video data reception, decoding, and playback. The terminal device is a terminal device with a high-quality or wide-angle camera. Therefore, when family A makes an audio and video call with the terminal device in family B, the terminal device in family B can easily see the multiple family members in family A. Members' videos, terminal devices in family A can easily view the videos of multiple family members in family B.

Description of drawings

Fig. 1 is a schematic diagram of the topology of a home audio-video communication system provided by the prior art;

FIG. 2 is a flow chart of the implementation of the audio and video communication method provided by Embodiment 1 of the present invention;

FIG. 3 is a flowchart for realizing the audio and video communication method provided by Embodiment 2 of the present invention;

FIG. 4 is a flow chart of the implementation of the audio and video communication method provided by Embodiment 3 of the present invention;

FIG. 5 is a flowchart for realizing the audio and video communication method provided by Embodiment 4 of the present invention;

FIG. 6 is a specific structural block diagram of a terminal device provided in Embodiment 5 of the present invention;

FIG. 7 is a specific structural block diagram of an audio and video call service center provided in Embodiment 6 of the present invention;

FIG. 8 is a specific structural block diagram of the audio and video communication system provided by Embodiment 7 of the present invention;

Fig. 9 is a specific structural block diagram of the audio and video communication system provided by the eighth embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the embodiment of the present invention, the first terminal device may select the second terminal device, and the second terminal device replaces the first terminal device to complete video data collection, encoding, and video data reception, decoding, and playback. The terminal device is a terminal device with a high-quality or wide-angle camera. Therefore, when family A makes an audio and video call with the terminal device in family B, the terminal device in family B can easily see the multiple family members in family A. Members' videos, terminal devices in family A can easily view the videos of multiple family members in family B.

The realization of the present invention is described in detail below in conjunction with specific embodiment:

Embodiment one

FIG. 2 shows the implementation process of the audio and video communication method provided by Embodiment 1 of the present invention. The first terminal device side is used as an example for illustration, and the details are as follows:

Step S201, the first terminal device sends a joining request to the audio-video call service center, requesting to be added to the home communication terminal list of the audio-video call service center, and the second terminal device is included in the home communication terminal list.

In the embodiment of the present invention, the first terminal device is a mobile terminal with an audio call function, and the second terminal device is a terminal device with a high-quality or wide-angle camera. After the first terminal and the second terminal automatically search for the audio and video call service center, both the first terminal and the second terminal device send a joining request to the audio and video call service center, requesting to join the family communication of the audio and video call service center Terminal list.

Step S202, after establishing an audio and video call with the peer audio and video communication system, the first terminal device completes the collection and encoding of audio data, and the reception, decoding, and playback of audio data.

In the embodiment of the present invention, after the first terminal device establishes an audio and video call with the peer audio and video communication system through the audio and video call service center, it can conduct an audio and video call with a terminal device in the peer audio and video communication system. Wherein, the first terminal device is responsible for collecting and encoding audio data and receiving, decoding, and playing audio data.

Specifically, the process for the first terminal device to complete the collection and encoding of audio data is as follows: the first terminal device collects audio data, adds a time stamp to the audio data, encodes it and sends it to the audio and video call service center .

In addition, before the first terminal device collects audio data, it is also necessary to perform the step of periodically synchronizing clocks between the first terminal device, the audio and video call service center, and the second terminal device, so as to ensure audio data Synchronization of video data.

In addition, as a preferred embodiment of the present invention, when the first terminal device completes the collection and encoding of audio data and the reception, decoding, and playback of audio data, the first terminal device can pull back the video or the first video collected by the second terminal device. One or two of the videos received by the second terminal device, the first terminal device completes the collection and encoding of the video data, and sends the encoded video data to the audio and video call service center, and may also notify the audio and video call service center. The first terminal device receives the video data sent by the audio and video call service center, and decodes and plays the video data.

Step S203, the first terminal device selects a second terminal device in the home communication terminal list, so that the second terminal device completes video data collection, encoding, and video data reception, decoding, and playback.

In the embodiment of the present invention, the first terminal device selects the second terminal device from the home communication terminal list of the audio and video call service center as the video data collection, coding and video data reception, decoding, and playing device.

Specifically, the second terminal device completes the collection and encoding of video data, including: the second terminal device collects video data, adds a time stamp to the video data, encodes it, and sends it to the audio and video call service center.

Similarly, before the second terminal device completes the acquisition and encoding of video data, it is also necessary to perform: a step of periodic clock synchronization between the first terminal device, the audio and video call service center, and the second terminal device , so as to ensure the synchronization of audio and video data.

In this embodiment, since the first terminal device can select the second terminal device, the second terminal device replaces the first terminal device to complete video data collection, encoding, and video data reception, decoding, and playback. Since the second terminal device It is a terminal device with a high-quality or wide-angle camera. Therefore, when family A makes an audio and video call with a terminal device in family B, the terminal device in family B can easily see the photos of multiple family members in family A. For video, terminal devices in family A can easily view videos of multiple family members in family B.

Embodiment two

FIG. 3 shows the implementation process of the audio and video communication method provided by Embodiment 2 of the present invention. The first terminal device side is used as an example for illustration, and the details are as follows:

Step S301, the first terminal device sends a joining request to the audio-video call service center, requesting to be added to the home communication terminal list of the audio-video call service center, and the second terminal device is included in the home communication terminal list.

Step S302, after establishing an audio and video call with the peer audio and video communication system, the first terminal device completes audio data collection, encoding, and audio data reception, decoding, and playback.

Step S303, the first terminal device selects a second terminal device in the home communication terminal list, so that the second terminal device completes video data collection, encoding, and video data reception, decoding, and playback.

In the embodiment of the present invention, during the execution of step S302 or step S303, step S304 or step S305 is further included.

Wherein, in step S304, the first terminal device sends a multi-party call invitation instruction to the audio-video call service center, so that the audio-video call service center notifies the third terminal device to participate in the audio-video call service center according to the multi-party call invitation instruction. A call between the first terminal device and the peer audio and video communication system is in progress.

In step S305, the first terminal device sends a request to join the call to the audio and video call service center, so that the audio and video call service center can make the first terminal device join the third party according to the request to join the call. During a call between the terminal device and the peer audio and video communication system.

It should be noted that the third terminal device is the same mobile terminal as the first terminal device and has audio and video call functions.

In this embodiment, during this call, the user member of the first terminal device may invite the user member of the third terminal device to participate in the call with the peer audio and video communication system. In addition, the user member of the third terminal device It can also actively request to participate in the call with the peer audio and video communication system, so that multiple members in the family audio and video call can participate in the call, allowing multiple members of the family to conduct audio and video with the other family on their respective terminal devices at the same time Calling facilitates simultaneous communication among multiple members of the user's family.

Embodiment three

FIG. 4 shows the implementation process of the audio and video communication method provided by Embodiment 3 of the present invention, and the audio and video call service center side is used as an example to illustrate, and the details are as follows:

Step S401, the audio and video call service center receives the joining requests sent by the first terminal device and the second terminal device, and adds the first terminal device and the second terminal device to the list of home communication terminals.

Step S402, the audio and video call service center establishes a communication channel between the first terminal device and the peer audio and video communication system.

Step S403, the audio and video call service center receives the first audio data sent by the first terminal device, and forwards the first audio data to the peer audio and video communication system.

Specifically, the first audio data is sent to the audio and video call service center after the first terminal device adds a time stamp to the collected audio data and encodes it.

In addition, before the audio and video call service center receives the first audio data sent by the first terminal device, it is also necessary to perform: a period between the audio and video call service center and the first terminal device and the second terminal device A permanent clock synchronization step, so as to ensure the synchronization of audio and video data.

Step S404, the audio-video call service center receives the second audio data sent by the peer-end audio-video communication system and forwards the second audio data to the first terminal device, so that the first terminal device can decode and play the second audio data the second audio data.

Step S405, the audio and video call service center receives the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list, and forwards the first video data to the peer audio and video communication system .

Specifically, the first video data is sent to the audio and video call service center after the second terminal device adds a time stamp to the collected video data and encodes it.

Similarly, before the audio and video call service center receives the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list, it is also necessary to perform: the audio and video call service center communicates with the first terminal The step of performing periodic clock synchronization between the device and the second terminal device, so as to ensure the synchronization of audio and video data.

Preferably, in the process of executing step S405, the audio and video call service center may receive the first video data sent by the first terminal device, and forward the first video data to the peer audio and video communication system.

Step S406, the audio-video call service center receives the second video data sent by the peer-end audio-video communication system and forwards the second video to the second terminal device, so that the second terminal device can decode and play the second video data the second video data.

Preferably, in the process of executing step S406, the audio-video call service center may receive the second video data sent by the peer-end audio-video communication system and forward the second video data to the first terminal device, so as to facilitate the The first terminal device decodes and plays the second video data.

In this embodiment, since the first terminal device can select the second terminal device, the second terminal device replaces the first terminal device to complete video data collection, encoding, and video data reception, decoding, and playback. Since the second terminal device It is a terminal device with a high-quality or wide-angle camera. Therefore, when family A makes an audio and video call with a terminal device in family B, the terminal device in family B can easily see the photos of multiple family members in family A. For video, terminal devices in family A can easily view videos of multiple family members in family B.

Embodiment four

FIG. 5 shows the implementation process of the audio-video communication method provided by Embodiment 4 of the present invention. The audio-video call service center side is used as an example for illustration, and the details are as follows:

Step S501, the audio and video call service center receives the joining requests sent by the first terminal device and the second terminal device, and adds the first terminal device and the second terminal device into the list of home communication terminals.

Step S502, the audio and video call service center establishes a communication channel between the first terminal device and the peer audio and video communication system.

Step S503, the audio and video call service center receives the first audio data sent by the first terminal device, and forwards the first audio data to the peer audio and video communication system.

Step S504, the audio-video call service center receives the second audio data sent by the peer-end audio-video communication system and forwards the second audio data to the first terminal device, so that the first terminal device can decode and play the second audio data the second audio data.

Step S505, the audio and video call service center receives the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list, and forwards the first video data to the peer audio and video communication system .

Step S506, the audio-video call service center receives the second video data sent by the peer-end audio-video communication system and forwards the second video to the second terminal device, so that the second terminal device can decode and play the second video data the second video data.

In the embodiment of the present invention, step S507 or step S508 is further included in the process of step S506.

Wherein, in step S507, the audio-video call service center notifies the third terminal device to participate in the call between the first terminal device and the peer audio-video communication system according to the multi-party call invitation instruction sent by the first terminal device middle.

In step S508, the audio-video call service center enables the first terminal device to join the call between the third terminal device and the opposite end audio-video communication system according to the request to join the call instruction sent by the first terminal device.

It should be noted that the third terminal device is the same mobile terminal as the first terminal device and has audio and video call functions.

In this embodiment, during this call, the user member of the first terminal device may invite the user member of the third terminal device to participate in the call with the peer audio and video communication system. In addition, the user member of the third terminal device It can also actively request to participate in the call with the peer audio and video communication system, so that multiple members in the family audio and video call can participate in the call, allowing multiple members of the family to simultaneously conduct audio with the peer family on their respective terminal devices Video calls facilitate simultaneous communication among multiple members of the user's family.

Embodiment five

FIG. 6 shows a specific structural block diagram of a terminal device provided by Embodiment 5 of the present invention. For ease of description, only parts related to the embodiment of the present invention are shown. In this embodiment, the terminal device 6 includes: a joining request sending unit 61 , an audio data processing unit 62 and a video device acquiring unit 63 .

Wherein, the joining request sending unit 61 is configured to send a joining request to the audio and video call service center, requesting to be added to the home communication terminal list of the audio and video call service center, and the home communication terminal list includes the second terminal device;

The audio data processing unit 62 is used to complete the collection, encoding, and reception, decoding, and playback of audio data after establishing an audio and video call with the opposite end audio and video communication system;

A video device acquisition unit 63 is configured to select a second terminal device in the home communication terminal list, so that the second terminal device completes video data collection, encoding, and video data reception, decoding, and playback.

Specifically, the audio data processing unit 62 collects audio data, adds a time stamp to the audio data, encodes it, and sends it to the audio and video call service center;

The video device acquisition unit 63 selects the second terminal device in the home communication terminal list, so that the second terminal device collects video data, adds a time stamp to the video data, encodes it, and sends it to The audio and video call service center.

Further, the terminal device 6 also includes:

The clock synchronization unit 64 is configured to perform periodic clock synchronization with the audio and video call service center and the second terminal device.

Further, the terminal device 6 also includes:

The first video data processing unit 65 is configured to complete the collection and encoding of video data, and send the encoded video data to the audio and video call service center.

Further, the terminal device also includes:

The second video data processing unit 66 is configured to receive the video data sent by the audio and video call service center, and decode and play the video data.

Further, the terminal device 6 also includes:

A multi-party call invitation instruction/request to join a call instruction sending unit 67, configured to send a multi-party call invitation instruction to the audio and video call service center, so that the audio and video call service center notifies a third terminal device according to the multi-party call invitation instruction Participate in the call between the terminal device and the peer audio and video communication system; or send a request to join the call instruction to the audio and video call service center, so that the audio and video call service center joins the call instruction according to the request The terminal device is made to join the call between the third terminal device and the peer audio and video communication system.

Further, the terminal device and the third terminal device are mobile terminals with an audio call function, and the second terminal device has a high-quality or wide-angle camera.

Embodiment six

FIG. 7 shows a specific structural block diagram of the audio and video call service center provided by Embodiment 6 of the present invention. For convenience of description, only the parts related to the embodiment of the present invention are shown. In this embodiment, the audio and video call service center 7 includes: a joining request receiving unit 71, a communication channel establishing unit 72, a first audio data processing unit 73, a second audio data processing unit 74, and a first video data processing unit 75 and the second video data processing unit 76 .

A join request receiving unit 71, configured to receive join requests sent by the first terminal device and the second terminal device, and add the first terminal device and the second terminal device to the family communication terminal list;

A communication channel establishing unit 72, configured to establish a communication channel between the first terminal device and the peer audio and video communication system;

The first audio data processing unit 73 is configured to receive the first audio data sent by the first terminal device, and forward the first audio data to the peer audio and video communication system;

The second audio data processing unit 74 is configured to receive the second audio data sent by the peer audio and video communication system and forward the second audio to the first terminal device, so that the first terminal device can decode and play the the second audio data;

The first video data processing unit 75 is configured to receive the first video data sent by the second terminal device, and forward the first video data to the peer audio and video communication system;

The second video data processing unit 76 is configured to receive the second video data sent by the peer audio and video communication system and forward the second video to the second terminal device, so that the second terminal device can decode and play the second video data the second video data.

Specifically, the first audio data is sent to the audio and video call service center after the first terminal device adds a time stamp to the collected audio data, and the first video data is sent to the audio and video call service center by the second terminal device Add a time stamp to the collected video data, encode it and send it to the audio and video call service center.

Further, the audio and video call service center 7 also includes:

A clock synchronization unit 77, configured to perform periodic clock synchronization with the first terminal device and the second terminal device.

Further, the first video data processing unit 75 is further configured to receive the first video data sent by the first terminal device, and forward the first video data to the peer audio and video communication system.

Further, the second video data processing unit 76 is also configured to receive the second video data sent by the peer audio and video communication system and forward the second video data to the first terminal device, so that the second A terminal device decodes and plays the second video data.

Further, the audio and video call service center 7 also includes:

The multi-party call control unit 78 is configured to notify the third terminal device to participate in the call between the first terminal device and the peer audio and video communication system according to the multi-party call invitation instruction sent by the first terminal device; or The request to join the call instruction sent by the first terminal device causes the first terminal device to join the call between the third terminal device and the peer audio-video communication system.

Embodiment seven

FIG. 8 shows a specific structural block diagram of an audio-video communication system provided by Embodiment 7 of the present invention. For ease of description, only parts related to the embodiment of the present invention are shown. In this embodiment, an audio and video communication system at one end is taken as an example for illustration. The audio and video communication system 8 includes a public network server 21, and the system also includes: an audio and video call service connected to the public network server 21 Center 22 and at least two terminal devices respectively connected to the audio and video call service center 22. In this embodiment, the terminal devices include a plurality of first terminal devices and a plurality of second terminal devices, wherein the first The terminal device is a mobile terminal with an audio and video call function, and the second terminal device is a terminal device with a high-quality or wide-angle camera, such as a large-screen terminal device such as a set-top box TV or a tablet computer PAD. In this embodiment, an audio-video communication system including one first terminal device 23 and one second terminal device 24 is taken as an example for illustration.

Specifically, the structure of the audio and video call service center 22 is shown in FIG. 7 , and the structure of the first terminal device 23 is shown in FIG. 6 , which will not be repeated here.

The following examples illustrate in detail the interaction process between the various physical units in the audio and video communication system, where the audio and video communication system is called family A, and the peer audio and video communication system that conducts audio and video calls with the audio and video communication system is called Family B:

1. Both the first terminal device and the second terminal device in family A participate in audio and video calls.

The first terminal device can select the second terminal device, and the second terminal device replaces the first terminal device to complete the collection and encoding of video data. During audio and video calls, the collection of audio and video data is fixed on the first terminal device in family A. Since the second terminal device is a terminal device with a high-quality or wide-angle camera, the connection between family A and family B When the terminal devices in family B make audio and video calls, the terminal devices in family B can conveniently watch the videos of multiple family members in family A.

2. The first terminal device and the second terminal device automatically search for the audio and video call service center in family A, and add them to the family communication terminal list of the audio and video call service center.

3. The first terminal device communicates with the terminal device in home B through the audio and video call service center in home A, and the first terminal device establishes a communication channel with home B through the audio and video call service center in home A.

4. The first terminal device obtains the information list of other terminal devices in the family A through the audio and video call service center in the family A.

5. Periodic clock synchronization is performed between the first terminal device, the second terminal device and the audio and video call service center in family A.

6. The first terminal device selects the device for video calls. In this embodiment, the device is the second terminal device, and the second terminal device completes the collection, encoding, and transmission of video data, as well as the reception, decoding, and playback of video data , the first terminal device collects, encodes, and sends audio data, and receives, decodes, and plays audio data. Certainly, the first terminal device may also decode, render or play audio data or video data or both at the same time.

7. When the audio and video call service center receives the device selection command of the first terminal device, it forwards the video data to the corresponding device, forwards the reply result, and records the selection result by itself, so as to control the forwarding of the corresponding audio and video data.

In this embodiment, since the first terminal device can select the second terminal device, the second terminal device replaces the first terminal device to complete video data acquisition, encoding, video data reception, decoding, and playback, because the second terminal device The terminal device is a terminal device with a high-quality or wide-angle camera. Therefore, when family A makes an audio and video call with the terminal device in family B, the terminal device in family B can easily see the multiple family members in family A. Members' videos, terminal devices in family A can easily view the videos of multiple family members in family B.

Embodiment eight

FIG. 9 shows a specific structural block diagram of an audio-video communication system provided by Embodiment 8 of the present invention. For ease of description, only parts related to the embodiment of the present invention are shown. In this embodiment, an audio and video communication system at one end is used as an example for illustration. The audio and video communication system includes a public network server 31, and the system also includes: an audio and video call service center connected to the public network server 31 32 and at least two terminal devices respectively connected to the audio and video call service center 32. In this embodiment, the terminal devices include a plurality of first terminal devices and a plurality of second terminal devices, wherein the first terminal The device is a mobile terminal with an audio and video call function, and the second terminal device is a terminal device with a high-quality or wide-angle camera, such as a set-top box TV or a tablet computer PAD and other large-screen terminal devices. In this embodiment, an audio-video communication system including a first terminal device 43 and a second terminal device 44 is taken as an example for illustration.

Specifically, the audio and video call service center 32 includes a joining request receiving unit 71, a communication channel establishing unit 72, a first audio data processing unit 73, a second audio data processing unit 74, a first video The data processing unit 75 and the second video data processing unit 76 also include a clock synchronization unit 77 and a multi-party call control unit 78 .

Wherein, the multi-party call control unit is configured to notify the third terminal device to participate in the call between the first terminal device and the peer audio and video communication system according to the multi-party call invitation instruction sent by the first terminal device; or According to the request to join call instruction sent by the first terminal device, the first terminal device is added to the call between the third terminal device and the peer audio-video communication system.

Specifically, the first terminal device 43 includes a join request sending unit 61, an audio data processing unit 62, and a video device acquiring unit 63 as shown in FIG. 6 , and also includes a clock synchronization unit 64, a first video data processing unit 65 , a second video data processing unit 66 and a multi-party call invitation instruction/request to join a call instruction sending unit 67.

Wherein, the multi-party call invitation instruction/request to join the call instruction sending unit 67 is used to send the multi-party call invitation instruction to the audio and video call service center, so that the audio and video call service center notifies the third party according to the multi-party call invitation instruction. The terminal device participates in the call between the terminal device and the peer audio and video communication system; or sends a request to join the call to the audio and video call service center, so that the audio and video call service center joins according to the request The call instruction enables the terminal device to join the call between the third terminal device and the peer audio and video communication system.

The following examples illustrate in detail the interaction process between the various physical units in the audio and video communication system, where the audio and video communication system is called family A, and the peer audio and video communication system that conducts audio and video calls with the audio and video communication system is called Family B:

1. The first terminal device 43 and the first terminal device 44 in the family A make a call with the terminal device in the family B together.

One of the first terminal device 43 and the first terminal device 44 (such as the first terminal device 43 ) talks first, and the first terminal device 43 can invite and accept the first terminal device 44 of other members in the home network to participate in the video call together.

2. The first terminal device 43 and the first terminal device 44 in the family A and other smart home terminal devices automatically search for the audio and video call service center in the family A, and add them to the family communication terminal list.

3. The first terminal device 43 in family A makes a call with family B through the audio and video call service center in family A, and the first terminal device 43 establishes a call with family B through the audio and video call service center in family A. communication channel.

4. The first terminal device 43 selects each data processing device for the video call as itself and performs clock synchronization with the audio and video call service center, and finally makes the video call.

5. During the call, the first terminal device 43 wants to invite the first terminal device 44 to participate in the call.

The first terminal device 43 sends an "invitation" command to the first terminal device 44 through the audio-video call service center in the family A, and the first terminal device 44 can reject or accept it. When the first terminal device 44 refuses, the audio and video call service center in the family A replies the rejection information to the first terminal device 43; The service center replies an acceptance message to the first terminal device 43, and then the first terminal device 43 sends an order to the audio-video service center in family A, asking it to notify the first terminal device 44 to make a call input and receive the first terminal device 44 call The input data is forwarded, and at the same time, the home audio and video data in the home B is sent to the first terminal device 43 and the first terminal device 44 . At this time, the first terminal device 44 acts as the first terminal device 43 , and the first terminal device 43 can watch the home audio and video in the family B and the audio and video of the first terminal device 44 . During this process, the first terminal device 43 may request the first terminal device 44 to become a call input operator; the first terminal device 44 may also invite the first terminal device 43 to become a call input operator again.

6. During the call of the first terminal device 43, the first terminal device 44 requests the first terminal device 43 to participate in the call:

The first terminal device 44 sends a "call request" command to the first terminal device 43 through the audio and video call service center, and the first terminal device 43 can reject or accept it. When the first terminal device 43 refuses, the audio and video call service center in family A will reply the rejection message to the first terminal device 44; The call service center replies an acceptance message to the first terminal device 44, and then the first terminal device 43 sends an order to the audio and video call service center in family A, asking it to notify the first terminal device 44 to make a call input, and at the same time receive the first terminal device 44 call the input data and forward it, and send the audio and video data in the family B to the first terminal device 43 and the first terminal device 44 at the same time. At this time, the first terminal device 44 acts as the first terminal device 43 , and the first terminal device 43 can watch the home audio and video in the family B and the audio and video of the first terminal device 44 . During this process, the first terminal device 43 may request the first terminal device 44 to become a call input operator; the first terminal device 44 may also invite the first terminal device 43 to become a call input operator again.

In this embodiment, during a video call, during this call, one user of the first terminal device may invite other users of the first terminal device to participate in the audio and video call with the opposite family. In addition, other The user member of the first terminal device can also actively request to participate in the audio and video call with the peer family, so that multiple members in the family audio and video call can participate in the call, allowing multiple members in the family to communicate with the peer on their respective terminal devices at the same time The audio and video calls can be made in the terminal family, which facilitates the simultaneous communication of multiple members in the user's family.

It is worth noting that in the above system embodiments, the units included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each functional unit It is only for the convenience of distinguishing each other, and is not used to limit the protection scope of the present invention.

In addition, those of ordinary skill in the art can understand that all or part of the steps in the methods of the above-mentioned embodiments can be completed by instructing related hardware through programs, and the corresponding programs can be stored in a computer-readable storage medium. Storage media, such as ROM/RAM, magnetic disk or optical disk, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (24)

1. A method for audio and video communication, characterized in that, comprising: The first terminal device sends a join request to the audio and video call service center, requesting to be added to the family communication terminal list of the audio and video call service center, the family communication terminal list includes the second terminal device, and the second terminal device It is a terminal device with a wide-angle camera; After establishing an audio and video call with the peer audio and video communication system, the first terminal device completes the collection and encoding of audio data and the reception, decoding, and playback of audio data; The first terminal device selects the second terminal device in the home communication terminal list, so that the second terminal device completes collection and encoding of video data and reception, decoding and playing of video data. 2. The method according to claim 1, wherein the first terminal device completes the collection and encoding of audio data comprising: The first terminal device collects audio data, adds a time stamp to the audio data, encodes it, and sends it to the audio and video call service center; The second terminal device completing the collection and encoding of video data includes: The second terminal device collects video data, adds a time stamp to the video data, encodes it, and sends it to the audio and video call service center. 3. The method according to claim 2, wherein audio data is collected at the first terminal device, and a time stamp is added to the audio data, encoded and then sent to the audio and video call service center Or the second terminal device collects video data, adds a time stamp to the video data, encodes it and sends it to the audio and video call service center, and further includes: Periodic clock synchronization is performed between the first terminal device, the audio and video call service center, and the second terminal device. 4. The method according to claim 1, wherein, in the process of the first terminal device completing the collection of audio data, encoding and receiving, decoding, and playing of audio data, it also includes: The first terminal device completes the collection and encoding of video data, and sends the encoded video data to the audio and video call service center. 5. The method according to claim 4, wherein, in the process of the first terminal device completing the collection of audio data, encoding and receiving, decoding, and playing of audio data, it also includes: The first terminal notifies the audio and video call service center that the first terminal device receives the video data sent by the audio and video call service center, and decodes and plays the video data. 6. The method according to any one of claims 1 to 5, characterized in that the acquisition, encoding and audio data reception, decoding, and playback of audio data are completed at the first terminal device, or the first terminal device Selecting the second terminal device in the home communication terminal list, and completing the process of video data collection, encoding, and video data reception, decoding, and playing by the second terminal device also includes: The first terminal device sends a multi-party call invitation instruction to the audio-video call service center, so that the audio-video call service center notifies a third terminal device to participate in the first terminal device and the audio-video call service center according to the multi-party call invitation instruction. During a call between peer audio and video communication systems; Or send a request to join the call instruction to the audio and video call service center, so that the audio and video call service center can make the first terminal device join the third terminal device to communicate with the opposite end audio and video according to the request to join the call instruction In a call between systems. 7. A method for audio and video communication, characterized in that the method comprises: The audio and video call service center receives the joining requests sent by the first terminal device and the second terminal device, and adds the first terminal device and the second terminal device to the list of home communication terminals, and the second terminal device has Wide-angle camera terminal equipment; The audio and video call service center establishes a communication channel between the first terminal device and the peer audio and video communication system; The audio and video call service center receives the first audio data sent by the first terminal device, and forwards the first audio data to the peer audio and video communication system; The audio and video call service center receives the second audio data sent by the peer audio and video communication system and forwards the second audio to the first terminal device, so that the first terminal device can decode and play the second audio data. audio data; The audio and video call service center receives the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list, and forwards the first video data to the peer audio and video communication system; The audio and video call service center receives the second video data sent by the peer audio and video communication system and forwards the second video to the second terminal device, so that the second terminal device can decode and play the second video data. video data. 8. The method according to claim 7, wherein the first audio data is that the first terminal device adds a time stamp to the collected audio data, encodes it and sends it to the audio and video call service center , the first video data is sent to the audio and video call service center after the second terminal device adds a time stamp to the collected video data and encodes it. 9. The method according to claim 8, characterized in that, receiving the first audio data sent by the first terminal device at the audio-video call service center or receiving the first terminal device from the home communication terminal list Before the first video data sent by the selected second terminal device, it also includes: Periodic clock synchronization is performed between the audio and video call service center and the first terminal device and the second terminal device. 10. The method according to claim 7, characterized in that, in the process of receiving the first video data sent by the first terminal device from the second terminal device selected in the home communication terminal list by the audio and video call service center ,Also includes: The audio and video call service center receives the first video data sent by the first terminal device, and forwards the first video data to the peer audio and video communication system. 11. The method according to claim 7, characterized in that, receiving the second video data sent by the terminal equipment of the peer audio and video communication system at the audio and video call service center and forwarding the second video data to the The second terminal device, after the second terminal device decodes and plays the second video data, further includes: The audio and video call service center receives the second video data sent by the peer audio and video communication system and forwards the second video data to the first terminal device, so that the first terminal device can decode and play the second video data. Two video data. 12. The method according to any one of claims 7 to 11, wherein the audio and video call service center receives the second video data sent by the peer audio and video communication system and forwards the second video to the said audio and video call service center. The second terminal device, so that in the process of decoding and playing the second video data by the second terminal device, it also includes: The audio and video call service center notifies the third terminal device to participate in the call between the first terminal device and the peer audio and video communication system according to the multi-party call invitation instruction sent by the first terminal device; or The audio and video call service center enables the first terminal device to join the call between the third terminal device and the peer audio and video communication system according to the request to join the call instruction sent by the first terminal device. 13. A terminal device, characterized in that it comprises: A join request sending unit, configured to send a join request to the audio and video call service center, requesting to be added to the home communication terminal list of the audio and video call service center, the home communication terminal list includes the second terminal device, and the first The second terminal device is a terminal device with a wide-angle camera; The audio data processing unit is used to complete audio data collection, encoding, and audio data reception, decoding, and playback after establishing an audio and video call with the peer audio and video communication system; The video device acquisition unit is configured to select a second terminal device in the home communication terminal list, so that the second terminal device completes video data collection, encoding, and video data reception, decoding, and playback. 14. The terminal device according to claim 13, wherein the audio data processing unit collects audio data, adds a time stamp to the audio data, encodes it and sends it to the audio and video call service center ; The video device acquisition unit selects the second terminal device in the home communication terminal list, so that the second terminal device collects video data, adds a time stamp to the video data, encodes it, and sends it to the The audio and video call service center. 15. The terminal device according to claim 14, further comprising: A clock synchronization unit, configured to perform periodic clock synchronization with the audio and video call service center and the second terminal device. 16. The terminal device according to claim 13, further comprising: The first video data processing unit is used to complete the collection and encoding of video data, and send the encoded video data to the audio and video call service center. 17. The terminal device according to claim 16, further comprising: The second video data processing unit is configured to receive the video data sent by the audio and video call service center, and decode and play the video data. 18. The terminal device according to any one of claims 13 to 17, wherein the terminal device further comprises: A multi-party call invitation instruction/request to join call instruction sending unit, configured to send a multi-party call invitation instruction to the audio and video call service center, so that the audio and video call service center can notify a third terminal device to participate according to the multi-party call invitation instruction to the call between the terminal device and the peer audio and video communication system; or Sending a request to join the call instruction to the audio and video call service center, so that the audio and video call service center can join the terminal device between the third terminal device and the peer audio and video communication system according to the request to join the call instruction in the call. 19. An audio and video call service center, characterized in that the audio and video call service center includes: The joining request receiving unit is configured to receive joining requests sent by the first terminal device and the second terminal device, and add the first terminal device and the second terminal device to the family communication terminal list, and the second terminal device It is a terminal device with a wide-angle camera; A communication channel establishment unit, configured to establish a communication channel between the first terminal device and the peer audio and video communication system; A first audio data processing unit, configured to receive the first audio data sent by the first terminal device, and forward the first audio data to the peer audio and video communication system; The second audio data processing unit is configured to receive the second audio data sent by the peer audio and video communication system and forward the second audio to the first terminal device, so that the first terminal device can decode and play the second audio data; The first video data processing unit is configured to receive the first video data sent by the second terminal device, and forward the first video data to the peer audio and video communication system; The second video data processing unit is configured to receive the second video data sent by the peer audio and video communication system and forward the second video to the second terminal device, so that the second terminal device can decode and play the Second video data. 20. The audio and video call service center according to claim 19, characterized in that, the first audio data is that the first terminal device adds a time stamp to the collected audio data, encodes it and sends it to the For the audio and video call service center, the first video data is sent to the audio and video call service center after the second terminal device adds a time stamp to the collected video data and encodes it. 21. The audio and video call service center according to claim 20, wherein the audio and video call service center further comprises: A clock synchronization unit, configured to perform periodic clock synchronization with the first terminal device and the second terminal device. 22. The audio and video call service center according to claim 19, wherein the first video data processing unit is further configured to receive the first video data sent by the first terminal device, and forward the first video data sent by the first terminal device. A video data is sent to the opposite end audio and video communication system. 23. The audio and video call service center according to claim 19, wherein the second video data processing unit is further configured to receive the second video data sent by the peer audio and video communication system and forward the second video data. The video data is sent to the first terminal device, so that the first terminal device decodes and plays the second video data. 24. The audio and video call service center according to any one of claims 19 to 23, wherein the audio and video call service center further comprises: A multi-party call control unit, configured to notify a third terminal device to participate in the call between the first terminal device and the peer audio and video communication system according to the multi-party call invitation instruction sent by the first terminal device; or According to the request to join call instruction sent by the first terminal device, the first terminal device is added to the call between the third terminal device and the peer audio-video communication system.