CONCEPT FOR VARYING A CODING QUANTIZATION PARAMETER ACROSS A PICTURE, CODING QUANTIZATION PARAMETER ADJUSTMENT, AND CODING QUANTIZATION PARAMETER ADAPTATION OF A MULTI-CHANNEL PICTURE

摘要

Coding quantization parameter variation or adaptation is made more effective by basing the determination of a coding quantization parameter for a predetermined block of the picture on a dispersion of a statistical sample value distribution of a high-pass filtered version of the predetermined block. The usage of the high-pass filtered version of the predetermined block as a basis for the determination of the dispersion instead of using, for instance, the un-filtered or original version of the predetermined block assists in a better adaptation of the resulting coding quantization parameter variation across the picture to the human visual system.