A Low-bite-rate Video Codec using Block-list-transform.
01 January 1989
A simple but efficient video codec is built for low-bite-rate videophone applications. The goal of this project is to construct a video codec at a low cost and good performance. In order to reduce hardware complexity, a simple interframe predictive coding structure is selected. The input pictures are partitioned into 2-D blocks, and only the blocks with significant frame differences are coded and transmitted to the decoder. The BLT coding algorithm, a generalized DPCM, is used to encode the frame differences between the previously reconstructed picture and the current picture. Some preliminary results from this coding system show reasonable coding performance at around 64 kbits/sec on typical videophone sequences.