Image encoding with dynamic buffer capacity level based compression adjustment.

摘要

Methods, systems, and computer programs for encoding images are described. In one aspect, quantized frequency domain vectors 50 are sequentially generated from a sequence of blocks 32 of the image 34. Each quantized frequency domain vector includes a set of quantized forward transform coefficients 48 that are derived from a respective image block. For each successive quantized frequency domain vector a current input capacity level of a buffer 38 is determined and the quantized frequency domain vector is modified to increase compressibility when the current input capacity level is determined to be below a prescribed threshold. Modified and unmodified quantized frequency domain vectors 50 are encoded into a sequence of encoded image blocks 36. The sequence of encoded image blocks 36 is stored in the buffer 38.