Design And Implementation Of Streaming Media Player Of Smart Phone Based On H.264 Codec

The rapid development of Mobile Internet makes increasingly popular smart mobile terminals, and traffic video display on the mobile terminal becomes part of video intelligent transportation systems. The thesis mainly studies the time complexity of H.264 decoder. Through the research of entropy coding algorithm, an improved algorithm is proposed. The thesis designs and implements a mobile streaming media player client of smartphone platform. The main work of this thesis includes:1. By studying of H.264/AVC video compression standard, the principle of the H.264 codec and the process of H.264 decoder in reference software JM18.1 are studied. We analyses the time complexity of each module of H.264 decoder, and results indicate that the time complexity of the inter prediction and entropy encoding are much larger than other modules in H.264 decoder.2. Based on studying CAVLC(Context-based Adaptive Variable Length Coding)algorithm in JM18.1, we design a new CAVLC decoding algorithm by proposed a new code table .The new CAVLC algorithm is accomplished based on the original JM18.1 decoder, and experiments show that new algorithm reduces the time complexity of H.264 decoder.3. Based on studying 3GPP PSS(Packet Switched Streaming Service)mobile streaming media system,a mobile streaming media player client based on Windows Mobile 6.5 is designed and implemented, which is used to display real-time traffic video. The client includes six modules: the network,audio and video buffer queue, audio/video decoding, audio/video synchronization, adaptive modules and UI. From the subjective satisfaction and performance testing of the actual client playback, the test results meet the design requirements.