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Audio Video Compression Stream Synthesis and Implementation

Audio Video Compression Stream Synthesis and Implementation
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摘要 Multiplex of digital streams is one of the key technologies in audio-video communication, and determines audio-video quality. A design scheme for an MPEG2 compliant digital television system including audio-video encoding and multiplexing was implemented. The principles and elements of system layer stream synthesis were analyzed. The key technologies of video and audio PES packetization were discussed, such as stream structure, scheduling matching, audio-video synchronization, data flow and buffering. DSP and FPGA are combined to construct header information and packet structure. The substitution of traditional RAM or PLD results in high operational efficiency and saves memory space. A scheduling algorithm was introduced for PES coding, using the monitor information of PES buffers. DTS is generated by multiplexer to guarantee synchronization. The system is not only simple but also stable, and maintains synchronization constraints of the standard. It supports both analogy and digital audio-video source input, and provides real-time MPEG2 compliant TS/PS output. It has perfect performance and meets the national broadcasting requirements. Multiplex of digital streams is one of the key technologies in audio-video communication, and determines audio-video quality. A design scheme for an MPEG2 compliant digital television system including audio-video encoding and multiplexing was implemented. The principles and elements of system layer stream synthesis were analyzed. The key technologies of video and audio PES packetization were discussed, such as stream structure, scheduling matching, audio-video synchronization, data flow and buffering. DSP and FPGA are combined to construct header information and packet structure. The substitution of traditional RAM or PLD results in high operational efficiency and saves memory space. A scheduling algorithm was introduced for PES coding, using the monitor information of PES buffers. DTS is generated by multiplexer to guarantee synchronization. The system is not only simple but also stable, and maintains synchronization constraints of the standard. It supports both analogy and digital audio-video source input, and provides real-time MPEG2 compliant TS/PS output. It has perfect performance and meets the national broadcasting requirements.
出处 《Journal of Shanghai Jiaotong university(Science)》 EI 2004年第3期45-49,共5页 上海交通大学学报(英文版)
关键词 digital television multiplex SYNTHESIZE STREAM 数字电视 音频流 视频流 MPEG2
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参考文献4

  • 1Cai Zhaohui,Subramanian K R,Me Aidong,et al.A RISC implementation of MPEG-2 TS packetization[].Proceedings of High Performance Computing in the Asia-Pacific Region.2000
  • 2Yu Bin,Nahrstedt K.A realtime software solution for resynchronizing filtered MPEG2 transport stream[].Proceedings of the IEEE th International Symposium on Multimedia Software Engineering.2002
  • 3Isovic D,Fohler G,Steffens L.Timing constraints of MPEG-2 decoding for high quality video: Misconceptions and realistic assumptions[].Proceedings of th Euromicro Conference on Real -Time Systems.2003
  • 4Kovacevic B D.A multi group STC system[].IEEE Transactions on Consumer Electronics.2003

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