摘要
本文提出了一种将ＨＤＴＶ信号的传输码率由１．２Ｇｂ／ｓ压缩至１４０Ｍｂ／ｓ以下的帧内子带ＤＣＴ编码方案，所提出的缓存器分级自适应控制方法可更有效地均衡码流。计算机模拟结果表明，ＨＤＴＶ图像数据压缩至１２０Ｍｂ／ｓ以下时，仍可达到传输质量要求。由于只采用了帧内编码方式，所以设备比较简单。
A subband coding scheme based on DCT in intraframe is demonstrated, which compresses the bit rate of HDTV signal from about 1.2Gb/s to less than 140Mb/s. The buffer hierarchical adaptive control on the bitrate of subbands makes the data stream into channel more uniform. Computer simulation results are presented in terms of bit-per-pei and SNR of the reconstructioned pictures. The objective and subjective quality of the reconstructed pictures are excellent.
出处
《通信学报》
EI
CSCD
北大核心
1996年第3期129-135,共7页
Journal on Communications
基金
国家教委博士点基金
国家自然科学基金
