CN108718418B - A method and device for managing a transmission link - Google Patents

Abstract

The disclosure provides a transmission link management method and device, relates to the technical field of communication, and can solve the problem of resource waste in the transmission process of image data. The specific technical scheme is as follows: acquiring image data, judging whether the difference value between the playing time length and the transmission time length of the image data is greater than or equal to a preset threshold value or not after the image transmission is finished, and disconnecting a data transmission link between the sending device and the receiving device if the difference value is greater than the threshold value. The invention achieves the purpose of saving system resources by optimizing the image data transmission management mode.

Description

A method and device for managing a transmission link

technical field

The present invention relates to the field of communication technologies, and in particular, to a method and device for a transmission link.

Background technique

In the control of the existing video remote playback equipment, it is necessary to transmit the server-side image data to the playback device side through the terminal equipment image transmission technology; the specific transmission process is: the sending device obtains the playback image data from the server, and transmits the image data through the transmission link. When the difference between the playback duration of the image data content and the image data transmission duration is large, the data link between the sending device and the receiving device is continuously connected, resulting in a waste of resources.

SUMMARY OF THE INVENTION

The embodiments of the present disclosure provide a transmission link management method, which can solve the problem of wasting system resources during image data transmission. The technical solution is as follows:

According to an embodiment of the present disclosure, a method for managing a transmission link is provided, and the method includes:

Obtain the playback duration of the image data, and the image data is sent by the sending device to the receiving device;

Get the transmission time of image data;

After the receiving device finishes receiving the image data, if the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold, disconnect the data transmission link between the sending device and the receiving device;

The transmission time includes the estimated time or the actual occupied time. The estimated time is the preset time required for the sending device to transmit the image data to the receiving device, and the actual occupied time is the actual time taken by the sending device to transmit the image data to the receiving device. length.

In the method for managing a transmission link provided by the embodiment of the present disclosure, before disconnecting the data transmission link between the sending device and the receiving device, the method further includes:

Determine whether the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold;

When the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold, a first disconnection instruction is generated, and the first disconnection instruction is used to instruct the receiving device to disconnect between the sending device and the receiving device after the receiving device finishes receiving the image data data transmission link.

In the method for managing a transmission link provided by the embodiment of the present disclosure, before disconnecting the data transmission link between the sending device and the receiving device, the method further includes:

A second disconnection instruction is received, where the second disconnection instruction is used to instruct to disconnect the data transmission link between the sending device and the receiving device.

In the method for managing a transmission link provided by the embodiment of the present disclosure, when the device for managing the transmission link is a receiving device, the method further includes:

receive and store image data;

Stored image data is played back on the monitor.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are: by acquiring the playback duration and transmission duration of the image data, when the difference between the two exceeds a threshold, the data link between the sending device and the transmission device is disconnected in time, so as to achieve an optimized chain Road management, the purpose of saving system resources.

The technical scheme of the present invention stores the image data to the receiving device while receiving the image data, and plays the stored image data through the display screen; therefore, regardless of whether the transmission link is disconnected, the playback of the image data is not affected, which achieves Smooth and stable playback.

In a second aspect, an embodiment of the present disclosure provides a transmission link management device, the device includes: a first duration acquisition module, a second duration acquisition module, and a disconnection module:

The first duration acquisition module is used to acquire the playback duration of the image data, and the image data is sent by the sending device to the receiving device;

The second duration acquisition module is used to acquire the transmission duration of the image data;

The disconnecting module is used to disconnect the data transmission link between the sending device and the receiving device if the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold after the receiving device finishes receiving the image data.

The transmission time includes the estimated time or the actual occupied time. The estimated time is the preset time required for the sending device to transmit the image data to the receiving device, and the actual occupied time is the actual time taken by the sending device to transmit the image data to the receiving device. length.

The second duration acquisition module in the device of the present invention includes a first acquisition unit, a second acquisition unit and a calculation unit,

a first acquisition unit, used for acquiring the total amount of data transmission of the image data;

a second obtaining unit, configured to obtain the transmission rate of the data transmission link between the sending device and the receiving device;

The calculation unit is configured to calculate and obtain the estimated duration according to the formula Tg=D/R, where Tg is the estimated duration, D is the total amount of data transmission, and R is the transmission rate.

The second duration acquisition module in the device of the present invention further includes a third acquisition unit,

The third acquiring unit is configured to acquire the actual occupied duration of transmitting the image data after the receiving device has received the image data.

The disconnection module in the device of the present invention further comprises: a judgment unit and a first signal transmission unit;

Judging unit: for judging whether the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold;

The first signal sending unit: used to generate a first disconnection instruction when the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold before disconnecting the data transmission link between the sending device and the receiving device, and the third A disconnection instruction is used to instruct the receiving device to disconnect the data transmission link between the sending device and the receiving device after the receiving device finishes receiving the image data.

The disconnecting module further includes: a second signal sending unit;

The second signal sending unit is configured to receive a second disconnection instruction before disconnecting the data transmission link between the sending device and the receiving device, where the second disconnection instruction is used to instruct disconnection between the sending device and the receiving device data transmission link.

When the management device of the present invention is a receiving device, it further comprises: a storage module and a display module;

Storage module: used to receive and store the image data;

Display module: used to play the stored image data through the display screen.

The management device of the present invention is used for the realization of the transmission link mode. When the playback time of the image data is longer than the transmission time, the sending device and the receiving device are always connected, resulting in waste of resources of the transmission link. The management of data transmission is optimized, and the management of data transmission is improved. The flexibility of data transmission is improved, and the utilization rate of the transmission link is improved.

The management device of the present invention stores the image data to the receiving device while receiving the image data, and plays the stored image data through the display screen; therefore, regardless of whether the transmission link is disconnected, the playback of the image data is not affected, which achieves Smooth and stable playback.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a flowchart of a transmission link management method provided by Embodiment 1 of the present disclosure;

2 is an information interaction diagram of a transmission link management method provided by Embodiment 2 of the present disclosure;

3 is an information interaction diagram of a transmission link management method provided by Embodiment 3 of the present disclosure;

4 is an information interaction diagram of a transmission link management method provided in Embodiment 4 of the present disclosure;

5 is a structural diagram of a transmission link management device provided in Embodiment 5 of the present disclosure;

6 is a structural diagram of a transmission link management device provided in Embodiment 5 of the present disclosure;

FIG. 7 is a structural diagram of a transmission link management apparatus according to Embodiment 5 of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of methods consistent with some aspects of the present disclosure as recited in the appended claims.

Example 1

An embodiment of the present disclosure provides a transmission link management method, which is applied to a transmission link management apparatus, where the transmission link management apparatus may be a sending device or a part of a sending device, or a receiving device or a part of a receiving device , or an independent device, as shown in Figure 1, the management method of the transmission link includes the following steps:

101. Acquire image data and playback duration.

Image data is sent from the sending device to the receiving device. Play time is used to indicate

As an optional embodiment, the image data includes: pictures, videos, Word, PPT and other contents.

102. Acquire the transmission duration of the image data.

The transmission time includes the estimated time or the actual occupied time. The estimated time is the preset time required for the sending device to transmit the image data to the receiving device, and the actual occupied time is the actual time taken by the sending device to transmit the image data to the receiving device. length.

Here, two specific examples are listed:

In the first example, the transmission duration includes the estimated duration, and the transmission duration of the acquired image data includes:

The total amount of data transfer to obtain image data;

Obtain the transmission rate of the data transmission link between the sending device and the receiving device;

The estimated duration is calculated according to the formula Tg=D/R, where Tg is the estimated duration, D is the total amount of data transmission, and R is the transmission rate.

In the second example, the transmission duration includes the actual occupied duration, and the transmission duration of the acquired image data includes:

After the receiving device receives the image data, the actual occupied time for transmitting the image data is obtained.

For the foregoing optional embodiment, the acquisition subject of the transmission duration includes a sending device, a receiving device, and a management device. Here, the sending device is used as an example for execution, and the specific execution steps include: when the sending device starts sending image data to the receiving device, recording the sending time stamp;

After the sending device completes sending the image data, obtain the receiving timestamp fed back by the receiving device;

The sending device calculates the difference between the sending timestamp and the receiving timestamp as the actual transmission duration.

103. After the receiving device finishes receiving the image data, if the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold, disconnect the data transmission link between the sending device and the receiving device.

It should be noted that, when the transmission duration includes the preset duration, the difference between the playback duration and the transmission duration can be determined before the image data transmission, or can be determined after the image data transmission is completed; when the transmission duration includes the actual occupied duration, the playback duration The difference between the duration and the transmission duration is determined after the image data is transmitted.

Disconnecting the link can be implemented in various ways. Here, three implementations of disconnecting the link are listed, which does not mean that the present disclosure is limited to this:

In a first implementation manner, the management apparatus of the transmission link may be a sending device or a receiving device;

Determine whether the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold; when the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold, disconnect the data transmission link between the sending device and the receiving device. The sending device or the receiving device can directly disconnect the transmission link after judgment.

In the second implementation manner, the management device of the transmission link may be a sending device or a receiving device, or an independent device;

Determine whether the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold; when the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold, a first disconnection instruction is generated, and the first disconnection instruction is used to indicate that in After the receiving device finishes receiving the image data, it disconnects the data transmission link between the sending device and the receiving device. The first disconnection instruction may be sent to the sending device or the receiving device.

For example, the management device of the transmission link is the sending device, and can send a first disconnection instruction to the receiving device, instructing the receiving device to disconnect the data transmission link between the sending device and the receiving device; the management device of the transmission link can also be A separate device that sends a first disconnect command to either the sending device or the receiving device. Of course, this is just an exemplary illustration, which does not mean that the present disclosure is limited thereto.

In a third implementation manner, the management apparatus of the transmission link may be a sending device or a receiving device;

Before disconnecting the data transmission link between the sending device and the receiving device, the method further includes:

A second disconnection instruction is received, where the second disconnection instruction is used to instruct to disconnect the data transmission link between the sending device and the receiving device.

For example, the device for managing the transmission link may be the sending device, and after receiving the second disconnection instruction sent by the receiving device, disconnects the data transmission link between the sending device and the receiving device; for another example, the management of the transmission link The apparatus may be a receiving device, and after receiving the second disconnection instruction sent by the sending device, disconnects the data transmission link between the sending device and the receiving device.

In the method for managing a transmission link provided by the embodiment of the present disclosure, the playback duration of the image data and the transmission duration of the image data are obtained; after the receiving device finishes receiving the image data, if the difference between the playback duration and the transmission duration is greater than or equal to a preset value Threshold, disconnect the data transmission link between the sending device and the receiving device; through the disconnection operation of the transmission link, when the data playback time is longer than the transmission time, the resource waste of the transmission link can be avoided, and the data transmission can be improved. flexibility, and improve the utilization of the transmission link. The management method of the present invention stores the image data to the receiving device while receiving the image data, and plays the stored image data through the display screen; therefore, regardless of whether the transmission link is disconnected, the playback of the image data is not affected, which achieves Smooth and stable playback

Embodiment 2

Based on the method for managing a transmission link described in the embodiment corresponding to FIG. 2, an embodiment of the present disclosure provides a method for managing a transmission link, which is applied to a sending device and a receiving device. The management device may be a sending device or a part of the sending device, and the method for managing the transmission link includes the following steps:

201. The sending device acquires image data and playback duration.

In an optional embodiment, the image data includes: pictures, videos, Word, PPT and other types of content.

The data information contained in the image data may include data information such as playing time, the total amount of data transmission, and the number of times of playing.

For example, in one embodiment, the playback duration is the product of the single playback duration and the number of playbacks.

202. The sending device obtains the estimated transmission duration of the image data.

In one embodiment, the method for obtaining the estimated transmission duration includes but is not limited to:

The sending device gets the total amount of data transferred.

The sending device obtains the transmission rate of the data transmission link between the sending device and the receiving device.

The sending device calculates the estimated duration according to the formula Tg=D/R.

Among them, Tg is the estimated duration, D is the total amount of data transmission, and R is the transmission rate.

203. The sending device determines whether the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold.

204. When the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold, the sending device generates a first disconnection instruction and sends the first disconnection instruction to the receiving device.

The first disconnection instruction is used to instruct the receiving device to disconnect the data transmission link between the sending device and the receiving device after the receiving device finishes receiving the image data.

205. The sending device sends image data to the receiving device.

206. After receiving the image data, the receiving device disconnects the data transmission link between the sending device and the receiving device according to the first disconnection instruction.

After the sending device starts sending the image data to the receiving device, the receiving device stores the image data when receiving the image data, and after receiving the image data, the receiving device stores the complete image data.

After disconnecting the data transmission link between the sending device and the receiving device, the receiving device plays the stored image data.

As an optional embodiment, after receiving the image data, the receiving device disconnects the data transmission link with the sending device according to receiving the first disconnection instruction, and plays the stored image data.

As an optional embodiment, when the receiving device disconnects from the sending device and plays the stored image data content in a loop, the sending device can connect with other devices to establish a transmission link, which improves the utilization of the transmission link efficiency.

In the prior art, when transmitting image data for loop playback, after the sending device has finished sending the image data, it still needs to remain connected to the receiving device until the loop playback is completed, which greatly wastes link resources and reduces transmission efficiency. The present invention only needs to disconnect the link with the receiving device after the transmitting device has completed the first transmission of the image data, and the receiving device can complete the loop playback by receiving the stored image data. Efficiency of transmission link usage.

Embodiment 3

Based on the method for managing a transmission link described in the embodiment corresponding to FIG. 3 , an embodiment of the present disclosure provides a method for managing a transmission link, which is applied to a sending device and a receiving device. The management device may be a receiving device or a part of the receiving device, and the management method of the transmission link includes the following steps:

301. The sending device acquires image data.

The sending device obtains the playback duration in the image data.

In an optional embodiment, the image data includes: pictures, videos, Word, PPT and other types of content.

The data information contained in the image data may include data information such as playing time, the total amount of data transmission, and the number of times of playing.

302. The sending device sends image data to the receiving device.

After the sending device starts sending image data to the receiving device, the receiving device stores the image data when it receives it, and plays the stored image data. After receiving the image data, the receiving device stores the complete image data.

After disconnecting the data transmission link between the sending device and the receiving device, the receiving device reads the stored image data according to the position where the image data has been played at the time of disconnection and continues playing from the position.

303. After the receiving device finishes receiving the image data, the receiving device acquires the playback duration and transmission duration of the image data.

As an optional embodiment, the manner of obtaining the transmission duration includes but is not limited to:

When the sending device starts sending image data to the receiving device, the receiving device records the sending time stamp;

After the sending device finishes sending the image data, the receiving device records the receiving time stamp;

The receiving device calculates the difference between the sending timestamp and the receiving timestamp according to the formula to obtain the actual transmission duration.

304. The receiving device determines whether the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold according to the playback duration and the transmission duration.

305. After the receiving device determines that the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold, disconnect the data transmission link between the sending device and the receiving device.

As an optional embodiment, the disconnection manner of the receiving device includes, but is not limited to, directly disconnecting the data transmission link with the sending device after the receiving device determines.

As an optional embodiment, after the receiving device has finished receiving the image data, when it is determined that the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold, the connection with the sending device is disconnected, and the received image data is automatically played; When the receiving device plays the image data, the sending device disconnects the link connection with the receiving device, thereby saving the performance resources and link resources of the sending device.

As an optional embodiment, the image data is a video file, and the playback duration of the file is 1 hour. After acquiring the playback duration, the sending device transmits the file to the receiving device. After receiving the image data, the receiving device obtains the transmission duration as 10 minutes according to the actual transmission time. After the receiving device determines that the difference between the playback duration and the transmission duration is greater than or equal to the preset threshold, it disconnects the data transmission link with the transmitting device. , and automatically plays the received image data. During the playback of the image data, the receiving device disconnects the link with the sending device.

In the prior art, when transmitting image data with a longer playback time and a shorter transmission time, the following situation occurs: after the sending device has sent the image data, it still needs to remain connected to the receiving device until the image data is played; and the present invention The receiving device only needs to finish receiving the image data, and then it can disconnect the link with the sending device and play the image data; it can be seen from the comparison that this method saves the performance resources and link resources of the sending device.

Embodiment 4

Based on the method for managing a transmission link described in the embodiment corresponding to FIG. 4 , an embodiment of the present disclosure provides a method for managing a transmission link, which is applied to an apparatus for managing a transmission link. In this embodiment, the implementation subject includes: : a sending device, a receiving device and a management device, the management device is an independent device and has the function of data interaction with the sending device and the receiving device, and the method flow of this embodiment includes the following steps:

401. The sending device acquires image data and playback duration.

402. The sending device sends the playback duration to the management device.

403. The sending device sends image data to the receiving device.

404. After the receiving device finishes receiving the image data, the receiving device acquires the transmission duration of the image data.

405. The receiving device sends the transmission duration to the management device.

406. The management device determines whether the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold according to the playback duration and the transmission duration.

407. When the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold, the management device generates a second disconnection instruction, and the second disconnection instruction is used to instruct the receiving device to disconnect the sending device from the receiving device after receiving the image data. A data transmission link between receiving devices.

408. Disconnect the data transmission link between the sending device and the receiving device according to the second disconnection instruction.

As an optional embodiment, the receiving device disconnects the data transmission link with the sending device according to the second disconnection instruction.

Embodiment 5

An embodiment of the present disclosure provides an apparatus for managing a transmission link, where the apparatus for managing a transmission link is configured to execute the data transmission management method provided in the first embodiment or the second embodiment or the third embodiment or the fourth embodiment, as shown in FIG. 5 . As shown, the management device 50 of the transmission link includes the following modules:

The first duration obtaining module 501 is used to obtain the playing duration of the image data, and the image data is sent by the sending device to the receiving device.

The second duration acquiring module 502 is configured to acquire the transmission duration of the image data.

The disconnection module 503 is configured to disconnect the data transmission link between the sending device and the receiving device if the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold after the receiving device completes receiving the image data.

The transmission time includes the estimated time or the actual occupied time. The estimated time is the preset time required for the sending device to transmit the image data to the receiving device, and the actual occupied time is the actual time taken by the sending device to transmit the image data to the receiving device. length.

As an optional embodiment, as shown in FIG. 6 , the second duration obtaining module 502 includes a first obtaining unit 5021, a second obtaining unit 5022 and a calculating unit 5023,

The first obtaining unit 5021 is configured to obtain the total amount of data transmission of the image data.

The second obtaining unit 5022 is configured to obtain the transmission rate of the data transmission link between the sending device and the receiving device.

The calculation unit 5023 is configured to calculate and obtain the estimated duration according to the formula Tg=D/R, where Tg is the estimated duration, D is the total amount of data transmission, and R is the transmission rate.

As an optional embodiment, the second duration obtaining module 502 includes a third obtaining unit 5024,

The third obtaining unit 5024 is configured to obtain the actual occupied duration of the transmitted image data after the receiving device has received the image data.

As an optional embodiment, as shown in FIG. 7 , the disconnection module 503 further includes: a judgment unit 5031 and a first signal sending unit 5032 .

Judging unit 5031: Judging whether the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold.

The first signal sending unit 5032 is used to generate a first disconnection instruction when the difference between the playback duration and the transmission duration is greater than or equal to a preset threshold before disconnecting the data transmission link between the sending device and the receiving device, The first disconnection instruction is used to instruct the receiving device to disconnect the data transmission link between the sending device and the receiving device after the receiving device finishes receiving the image data.

As an optional embodiment, the disconnection module 503 further includes: a second signal sending unit 5033 .

The second signal sending unit 5033 is configured to receive a second disconnection instruction before disconnecting the data transmission link between the sending device and the receiving device, where the second disconnection instruction is used to instruct disconnection between the sending device and the receiving device data transmission link.

The management device provided by the embodiment of the present disclosure is used for the implementation of the transmission link mode. When the playback time of the image data is longer than the transmission time, the sending device and the receiving device are always connected, resulting in waste of transmission link resources, and optimizes the data transmission. management, which improves the flexibility of data transmission and improves the utilization rate of the transmission link.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (8)

1. A management method of transmission link is characterized in that a management device applied to the transmission link comprises the following steps:

acquiring the playing duration of image data, wherein the image data is sent to receiving equipment by sending equipment;

acquiring the transmission duration of the image data; the transmission time length comprises estimated time length or actual occupied time length, the estimated time length is preset time length occupied by the sending equipment for transmitting the image data to the receiving equipment, and the actual occupied time length is time length actually occupied by the sending equipment for transmitting the image data to the receiving equipment;

after the receiving device finishes receiving the image data, judging whether the difference value between the playing time length and the transmission time length is greater than or equal to a preset threshold value or not;

when the difference value between the playing time length and the transmission time length is greater than or equal to the preset threshold value, generating a first disconnection instruction, wherein the first disconnection instruction is used for indicating that a data transmission link between the sending device and the receiving device is disconnected after the receiving device finishes receiving the image data;

or, receiving a second disconnection instruction, where the second disconnection instruction is used to instruct to disconnect a data transmission link between the sending device and the receiving device;

and disconnecting the data transmission link between the sending equipment and the receiving equipment.

2. The method for managing transmission link according to claim 1, wherein the transmission duration includes an estimated duration, and the acquiring the transmission duration of the image data includes:

acquiring the total data transmission amount of the image data;

acquiring the transmission rate of a data transmission link between the sending equipment and the receiving equipment;

and calculating the estimated duration according to a formula Tg-D/R, wherein Tg is the estimated duration, D is the total data transmission amount, and R is the transmission rate.

3. The method for managing transmission link according to claim 1, wherein the transmission duration includes an actual occupation duration, and the acquiring the transmission duration of the image data includes:

and after the receiving equipment receives the image data, acquiring the actual occupation time for transmitting the image data.

4. A method for managing a transmission link according to any one of claims 1 to 3, wherein the management means of the transmission link is a receiving device, the method further comprising:

receiving and storing the image data;

and playing the stored image data through a display screen.

5. A management device of a transmission link is characterized by comprising a first duration acquisition module, a second duration acquisition module and a disconnection module:

the first time length obtaining module is used for obtaining the playing time length of image data, and the image data is sent to the receiving device by the sending device;

the second duration acquisition module is used for acquiring the transmission duration of the image data;

the disconnection module is configured to disconnect a data transmission link between the sending device and the receiving device if a difference between the playing time length and the transmission time length is greater than or equal to a preset threshold after the receiving device completes receiving the image data;

the transmission time length comprises estimated time length or actual occupied time length, the estimated time length is preset time length occupied by the sending equipment for transmitting the image data to the receiving equipment, and the actual occupied time length is time length actually occupied by the sending equipment for transmitting the image data to the receiving equipment;

wherein the disconnect module comprises: a judging unit and a first signal transmitting unit;

the judgment unit: the time length judging unit is used for judging whether the difference value between the playing time length and the transmission time length is greater than or equal to the preset threshold value or not;

the first signal transmitting unit: before disconnecting the data transmission link between the sending device and the receiving device, when a difference value between the playing time length and the transmission time length is greater than or equal to the preset threshold, generating a first disconnection instruction, where the first disconnection instruction is used to instruct to disconnect the data transmission link between the sending device and the receiving device after the receiving device finishes receiving the image data;

or, the disconnection module comprises: a second signal transmitting unit;

the second signal sending unit is configured to receive a second disconnection instruction before disconnecting the data transmission link between the sending device and the receiving device, where the second disconnection instruction is used to instruct to disconnect the data transmission link between the sending device and the receiving device.

6. The apparatus of claim 5, wherein the second duration obtaining module comprises a first obtaining unit, a second obtaining unit and a calculating unit,

the first acquisition unit is used for acquiring the total data transmission amount of the image data;

the second obtaining unit is configured to obtain a transmission rate of a data transmission link between the sending device and the receiving device;

and the calculating unit is used for calculating and acquiring the estimated duration according to a formula Tg-D/R, wherein Tg is the estimated duration, D is the total data transmission amount, and R is the transmission rate.

7. The apparatus of claim 5, wherein the second duration obtaining module comprises a third obtaining unit,

the third obtaining unit is configured to obtain an actual occupation time for transmitting the image data after the receiving device has received the image data.

8. The management device of a transmission link according to any one of claims 5 to 7, wherein the management device of the transmission link is a receiving device, and the receiving device comprises: a storage module and a display module;

the storage module: for receiving and storing said image data;

the display module: the image data is used for playing the stored image data through a display screen.

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