Audio playing apparatus and method, and digital television chip

Abstract

The invention provides an audio playing method for a mobile multimedia broadcasting system. The audio playing method comprises the following steps: decoded audio data is obtained; an audio data address pointer is pointed to a current cache address of the decoded audio data; the audio data address pointer is compared with a playing pointer in the audio playing process, and the audio data is played or stopped playing according to the comparison result. The method aims at the disadvantages of weaker function and limited resources of an operating system on a mobile multimedia broadcasting terminal chip to control the playing of the audio data by comparing the audio data address pointer with the playing pointer; therefore, the invention has simple realization method, short realization code, no addition of hardware and software equipment and drive support and less occupied resources, and the audio data can be conveniently integrated into the mobile terminal chip. The method further realizes quick audio switching by resetting the state and directions of the playing pointer when a channel switching is carried out on the mobile terminal.

Description

technical field [0001] The invention relates to the technical field of mobile multimedia broadcasting, in particular to an audio playing device and method for a mobile multimedia broadcasting system, and a digital TV chip for receiving mobile multimedia broadcasting. Background technique [0002] Mobile multimedia broadcasting is an emerging multimedia playback technology. In recent years, this technology and standards have developed rapidly, such as digital video broadcast handheld reception (DVB-H, Digital Video Broadcast Handheld) in Europe, and media single forward link in the United States. (MediaFLO, Media ForwardLink Only) and China's mobile multimedia broadcasting system (CMMB, China Mobile MultimediaBroadcast), etc., provide its end users with many service contents, such as advertisements, weather forecasts, news, sports programs, variety shows, multimedia radio dramas, movies, etc. Programs, users can choose different services according to their hobbies. [0003] ...

AI Technical Summary

Problems solved by technology

Its advantage is that it is very convenient for users to use, but its disadvantages are also obvious. For example, due to the need for more software, hardware and driver support, the system is relatively large and complex, and it takes up more resources. It cannot be integrated in some embedded systems with weaker functions. in the operating system

For example, the operating system on the mobile multimedia broadcasting terminal chip, this type of operating system has to consider factors such as the power consumption of the mobile device terminal, and the processor's ability is relatively limited, so the function is weak and the resources are limited; in addition, the current popular multimedia The playback engine does not have an open internal structure and cannot be modified to meet the needs of digital TV broadcasting end users to quickly switch channels to watch and listen to different programs when playing programs

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