基于通用DSP的数字电视信源解码器的软件实现  

Software Implementation of DTV Source Decoder Based on General DSP

作　　者：国澄明[1] 刘学丰[1] 胡雪芬[1] 朱永松[1] 肖瑞珠[1] 张凤珊[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《天津大学学报》2006年第11期1364-1369,共6页Journal of Tianjin University(Science and Technology)

摘　　要：为实现数字电视信源解码器,提出了一种基于通用数字信号处理器的总体方案,并在嵌入式实时操作系统μC/OS-Ⅱ上提出了以数据为驱动源,基于任务优先级的多任务实时调度策略,成功地实现了对传送流输入、解复用、音频解码、视频解码、视频显示和音频播放等任务的实时调度.本系统全软件实时实现了单路标准清晰度数字电视信源解码器的功能,CPU利用率约为9000/.To implement the digital television source decoder, the overall scheme based on general digital signal processor（DSP） was presented. In the embedded real-time operating system μC/OS-Ⅱ, a multi-task real- time schedule strategy based on the task priority was put forward driven by data. Transport stream input, demultiplexing, audio decoding, video decoding, video display, and audio playback were scheduled in real-time successfully. The system implements the function of single channel standard definition digital television source decoder all in software, and the CPU load ratio is about 90%.

关 键 词：数字信号处理器 标准清晰度电视 信源解码器 μC/OS-Ⅱ 

分 类 号：TN941.1[电子电信—信号与信息处理]