A real-time video decoder for digital HDTV

作者：Ling N^*; Wang NT

来源：Journal of Vlsi Signal Processing Systems for Signal Image and Video Technology, 2003, 33(3): 295-306.

DOI：10.1023/A:1022179914445

In this paper, an architecture for real-time digital HDTV video decoding is presented. Our architecture is based on a dual decoding datapath controlled in a fixed schedule with an efficient write-back scheme for anchor pictures. The decoding datapath is synchronized at the block (8 x 8 pixels) level. Unlike other decoding approaches such as the slice bar decoding method and the cross-divide method, our scheme reduces memory access contention problem to achieve real-time HDTV decoding without a high cost in overall decoder buffers, architecture, and bus. In comparison to data-flow approaches, our method eliminates the complexity associated with tagged data operations. Our anchor picture storage is organized to minimize page-breaks during memory accesses. Simulation shows that with a relatively low rate 81 MHz clock, our decoder can decode MPEG-2 MP@ HL HDTV in real-time, based on an ATSC video format of 1,920 1,080 pixels/frame at 30 frames/s, at a bit rate of 18 to 20 Mbps.

• 出版日期2003-3