Motion-Compensated Coder

In an earlier paper, an extension of the pel recursive techniques of Netravali and Robbins [2] and Cafforio and Rocca [3] was introduced. Here a method is provided to realize the algorithm in hardware, with some approximations. The prediction error distribution allows the use of quantized variables to a lookup table of reasonable size. The algorithm is then incorporated into a simple multimode coder capable of 1.5 bits/pel on the sequence examined. The coder incorporates a spot filter, quantizer, block run length coding, and variable word length coding and subsampling. Simulation results are presented, including bit rate, buffer status, and mode control analysis.