Embedded codec circuitry for sub-block based entropy coding of quantized-transformed residual levels

摘要

An embedded codec (EBC) circuitry includes a memory to store a plurality of one dimensional (1D) sub-blocks of quantized-transformed residual levels for a 1D image block and encoder circuitry to allocate a set of signaling bits to each 1D sub-block of the plurality of 1D sub-blocks. The encoder circuitry selects an entropy coding scheme, from a set of entropy coding schemes, for each 1D sub-block of the plurality of 1D sub-blocks, based on the allocated set of signaling bits for each 1D sub-block. The encoder circuitry generates a bit-stream of encoded 1D image block by selective application of the entropy coding scheme on a DC quantized-transformed residual level, a plurality of AC quantized-transformed residual levels, or a combination of the DC quantized-transformed residual level and the plurality of AC quantized-transformed residual levels of each 1D sub-block of the plurality of 1D sub-blocks.