视频解码系统中读写带宽压缩算法设计

An adaptive bandwidth reduction scheme with reference frame compression for video decoding

随着人们更多地使用携带式消费电子产品,电子产品中的电力消耗问题已经渐渐成为视频编解码器设计中关注的最主要的设计问题。特别是在最新的编码标准H.264/AVC中,由于采用了多种新的先进的压缩策略,编码器达到了更高的压缩效率的同时,由于这些新的性能,使H.264/AVC的解码器需要对外部存储进行大量的读取。所以,内存读取带宽成为对于整个系统成本的关键问题,具体如在使用电池提供高清视频播放的消费者电子产品中,需要以更低的电力提供更好更长时间的视频。在这个研究中,提出了针对于视频压缩解码系统中内存读写带宽问题所设计的可调的参考帧压缩算法设计的方案,通过降低系统读取外部内存的带宽而达到降低视频解码系统电力消耗的目的。

Nowadays,as more and more portable consumer electronics video devices are becoming popular,power becomes the primary design issue for video coders/decoders.The state-of-the-art video coding standard H.264/AVC achieved high compression efficiency by applying a number of highlighted coding strategies.Due to these new features,the decoder requires high memory bandwidth to off-chip memory or large amounts of on-chip cache memory.Therefore,memory bandwidth becomes a critical factor of whole system cost,especially for those battery-operated consumer electronic video devices with high-definition（HD） display capability.In this research,an adaptive bandwidth reduction scheme is proposed.