Motion compensated multiresolution transmission of HD video using multistage quantizers
Multiresolution (MR) transmission of compressed video is performed using subbands. The subband decomposition is used for both hierarchical estimation of the motion and encoding of the motion-compensated error frame. With this approach, the video at a given resolution embeds lower-resolution video. Frequency roll-off of higher-frequency subbands is used to obtain visually pleasing low-resolution videos at low-bit rates. It is well known that the transmission of higher-resolution video requires finely quantized low-resolution video. The necessary refinement of the coarsely quantized low-resolution video is made by using multistage quantization. A novel technique is introduced to improve the performance of conventional multistage quantization. Simulation of a three-resolution MR coding system were made on a monochrome MIT test HD (high-definition) video, which is 30 frames long at 30 frames/s with 1600*960 8-bit pixels per frame.<<ETX>>