CN201114558Y - Service Switching Device for Mobile Multimedia Broadcasting Terminal - Google Patents

Abstract

The utility model provides a service switching device for a mobile multimedia broadcast terminal, wherein the device includes: a first analysis unit, located on the terminal, used to receive and analyze a multiplexing frame whose multiplexing frame number is 0, and obtain relevant Control information; the second parsing unit is used to receive and parse the current multiplexed frame to obtain relevant data of the multiplexed frame; the third parsed unit is used to parse the target multiplexed subframe in the multiplexed subframe according to the relevant data, Obtain relevant information of the target multimedia service; and set a playback unit for setting relevant parameters of the video decoder and the audio decoder, and start playing the target multimedia service when the I frame of the target multimedia service is received. Therefore, through the utility model, after completing the acquisition of related parameters and setting and modification of related units, the service switching function inside a multiplexing frame can be completed only after waiting for the I frame of the target service to appear.

Description

Service Switching Device for Mobile Multimedia Broadcasting Terminal

technical field

The utility model relates to the field of digital mobile communication, in particular to a service switching device for a mobile multimedia broadcasting terminal and a mobile terminal using the device.

Background technique

In recent years, digital mobile multimedia broadcasting technologies and standards have developed rapidly, such as DVB-H (Digital Video Broadcasting Handheld Receiver: Digital Video Broadcast Handheld) in Europe, MediaFLO (Media Forward Link Only) in the United States and China's CMMB (Mobile Multimedia Broadcasting: China MobileMultimedia Broadcasting), etc., they provide many services for their end users, such as advertisements, weather forecasts, news, sports programs, variety shows, multimedia radio dramas, movies and other programs, users can choose according to their own hobbies Service programs for mobile multimedia broadcasting.

Mobile multimedia broadcasting uses a time-division method to send multimedia broadcasting services. The broadcast channel frame lasts for 1 second and consists of 40 time slots of 25 milliseconds. One or more time slots can carry data encapsulated in a broadcast multiplexing frame. In the multiplexing frame structure of mobile multimedia broadcasting, the multiplexing frame is divided into three parts: the multiplexing frame header, the multiplexing frame payload and the padding. A multiplex frame (multiplex frame 0 is used to transmit control information) contains multiple multiplex subframes, each multiplex subframe can carry a multimedia service, and the first multiplex subframe defaults to full screen Display of multimedia services. The structure of the multiplexing frame is shown in Figure 1.

Each multiplexing subframe contains video data and audio data. The video data mainly includes three kinds of image coding frames, I frame, B frame, and P frame. I-frames are intra-coded and can be decoded independently. B frames and P frames are inter-coded and cannot be decoded independently.

The terminal can switch between multiple multimedia services according to the control information. Since various parameters of the multiplexing frame and the multiplexing subframe need to be used when the terminal is switched, it is necessary to provide a device for the terminal to complete service switching.

Utility model content

The utility model provides a service switching device for a mobile multimedia broadcasting terminal, which enables the terminal to perform service switching within a multiplexing frame through the relevant information in the multiplexing frame header and the multiplexing subframe.

The utility model provides a service switching device for a mobile multimedia broadcast terminal, which may include: a first analysis unit, located on the terminal, used to receive and analyze a multiplexing frame whose multiplexing frame number is 0, and obtain related control information ; The second analysis unit is used to receive and analyze the current multiplexed frame to obtain relevant data of the multiplexed frame; the third analysis unit is used to analyze the target multiplexed subframe in the multiplexed subframe according to the relevant data to obtain the target multiplexed subframe Multimedia service-related information; and setting a playback unit for setting relevant parameters of the video decoder and audio decoder, and when receiving the I frame of the target multimedia service, start playing the target multimedia service.

According to the present invention, the control information may include at least one of the following: network information table, electronic service guide, service multiplexing configuration table, and service configuration table.

The relevant data may include at least one of the following: the number of multiplexed subframes, the length of the multiplexed subframes, and the encoding of the multiplexed subframes.

In addition, the target multimedia service-related information may include at least one of the following: video algorithm type, video code rate indication, image display indication, resolution indication, and frequency frame.

The relevant parameters may include at least one of the following: a decoding algorithm, and an image display frame rate.

According to the utility model, a mobile multimedia broadcasting terminal is also proposed, which uses the above-mentioned service switching device.

Through the utility model, after completing the acquisition of related parameters and setting modification of related units, the service switching function inside a multiplexing frame can be completed only after waiting for the I frame of the target service to appear.

Other features and advantages of the present invention will be set forth in the following description, and, in part, will be apparent from the description, or can be learned by practicing the present invention. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is a schematic structural diagram of a multiplexing frame; and

Fig. 2 is a cabinet diagram of the service switching device of the mobile multimedia broadcasting terminal according to the present invention.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of a multiplexing frame. Fig. 2 is a block diagram of a service switching device 200 for a mobile multimedia broadcast terminal according to the present invention. The utility model will be described below in conjunction with Fig. 1 and Fig. 2 .

As shown in Figure 2, the device includes: a first parsing unit 202, located on the terminal, for receiving and parsing multiplexed frame 0 to obtain relevant control information; a second parsing unit 204, for receiving and parsing the current multiplexed frame 0 frame to obtain relevant data of the multiplexed frame; the third parsing unit 206 is used to analyze the target multiplexed subframe in the multiplexed subframe according to the relevant data to obtain relevant information of the target multimedia service; and the playback unit 208 is set for Set the relevant parameters of the video decoder and the audio decoder, and start playing the target multimedia service when the I frame of the target multimedia service is received.

Wherein, the control information includes at least one of the following: a network information table, an electronic service guide, a service multiplexing configuration table, and a service configuration table.

The relevant data includes at least one of the following: the number of multiplexed subframes, the length of the multiplexed subframes, and the encoding of the multiplexed subframes.

In addition, the target multimedia service-related information includes at least one of the following: video algorithm type, video code rate indication, image display indication, resolution indication, and frequency frame.

The related parameters include at least one of the following: decoding algorithm, and image display frame rate.

It should be understood here that the multimedia broadcasting terminal using the above service switching device may include mobile phones, PDAs, handheld terminals, and mobile TVs.

To sum up, with the technical solution of the present invention, after completing the acquisition of relevant parameters and the setting modification of relevant units, the service switching function within a multiplexing frame can be completed only after the I frame of the target service appears.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. A service switching device for a mobile multimedia broadcast terminal, characterized in that it comprises: The first parsing unit is located on the terminal and is used to receive and parse the multiplexed frame whose multiplexed frame number is 0, and obtain relevant control information; The second parsing unit is configured to receive and parse the current multiplexed frame to obtain relevant data of the multiplexed frame; A third parsing unit, connected to the second parsing unit, for parsing the target multiplexed subframe in the multiplexed subframe according to the related data to obtain target multimedia service related information; and The playing unit is set, which is used to set the relevant parameters of the video decoder and the audio decoder, and start playing the target multimedia service when the I frame of the target multimedia service is received. 2. The service switching device according to claim 1, wherein the control information includes at least one of the following: a network information table, an electronic service guide, a service multiplexing configuration table, and a service configuration table. 3. The service switching device according to claim 1, wherein the relevant data includes at least one of the following: the number of multiplexed subframes, the length of the multiplexed subframes, and the encoding of the multiplexed subframes. 4. The service switching device according to claim 1, wherein the target multimedia service-related information includes at least one of the following: video algorithm type, video code rate indication, image display indication, resolution indication, and frequency frame . 5 . The service switching device according to claim 1 , wherein the relevant parameters include at least one of the following: a decoding algorithm, and an image display frame rate. 6. A mobile multimedia broadcasting terminal, having the service switching device according to any one of claims 1 to 5.