IMAGE BLOCK CODING BASED ON PIXEL-DOMAIN PRE-PROCESSING OPERATIONS ON IMAGE BLOCK

摘要

An embedded codec (EBC) circuit is provided for coding an image block based on pixel-domain pre-processing operations on the image block. The EBC circuit calculates, in the pixel-domain, a first sum of absolute differences (SAD) from a memory storing the first image block and, in the pixel-domain, a first prediction block of row-wise residual values, column-wise, and encoder circuitry for calculating a second SAD from the second predictive block of residual values. The encoder circuit selects, for each of the first encoding mode and the second encoding mode, one residual prediction type from the set of residual prediction types as an optimal residual prediction type, and a set of quantization parameters as optimal quantization parameters. The encoder circuitry generates, based on the selected residual prediction type and the selected quantization parameter set, a bitstream set of a first image block encoded in the first encoding mode and the second encoding mode, respectively.