关键词: 码率控制, 编码通道, 率失真斜率, 截断, 超大规模集成电路

Abstract:

In order to implement the real-time code-stream truncation during the Tierl coding in JPEG2000, the rest rate-distortion information of an image tile is combined with the rate-distortion slope of the current coding pass to determine the truncation of the current coding pass, thus effectively guaranteeing the real-time coding and decoding of the JPEG2000 system. Moreover, the JPEG2000 VLSI architecture is built up based on the algorithm proposed in this paper, which can truncate the code stream real-time during the Tierl coding. Experimental results show that the proposed algorithm helps to truncate the code stream during the coding with high real-time performance, less working memory and excellent reconstructed image quality.

Key words: code-rate control, coding pass, rate-distortion slope, truncation, very large scale integration