基于ADSP2187的HDTV音频编码器系统

Audio Encoder System in HDTV Based on ADSP2187 Implementation

设计并实现了基于 ADSP2 1 87处理器的高清晰度电视信源编码系统中的音频编码器。编码器由实时编码和 PES打包构成 ,实时编码完成立体声数字音频的编码压缩 ,压缩的码流符合 ISO/IEC1 1 1 83-3MPEG-2标准 ,同时还接收 Dolby AC-3ES流输入。 PES打包完成 MPEG-2与 AC-3ES流的 PES打包。文中阐述了编码器的工作原理及设计思想 ,描述了该编码器硬件系统结构 ,分析了硬件设计的时序。

Design and implementation of the real-time MPEG-2 audio encoder in HDTV are presented and hardware architecture is described. The encoder is made up real-time encoding and packetization elementary system (PES) packetization parts. Real-time encoding part is designed with ADSP2187 according with ISO/IEC11183-3 MPEG-2 standard. PES packetization is described to implement elementary streams of MPEG-2 and AC-3 transforming transport stream. The principles and ideas of the encoder are proposed. Timing sequence of the hardware is analyzed.