The chroma QP value for the second chroma component is computed as:
QPchroma[1]=
QPluma+
QPoffset_
pps[1]+
QPoffset_slice[1]+
QPoffset_quant_group[0]+
QPoffset_quant_group[1].??(6)
As mentioned, in some embodiments, the definition of a luma and/or chroma quantization group is specified by parameters that are in the picture level. FIG. 3 illustrates an example picture header or PPS 300 that specifies a definition of a chroma quantization group. The example picture header 300 is associated with the picture 102 of the video coding structure 100. The picture header 300 is described by pseudo code that is modified from the H.265 standard in order to accommodate additional chroma QP offsets (i.e., the adaptation of chroma QP values). In some embodiments, a pseudo code for a video standard (such as the H.265 standard or a modified standard) describes the operations that are required of a video decoder when processing a bitstream that is in compliance with the video standard. A pseudo code also describes the operations that are required of a video encoder when generating a bitstream that is in compliance with the video standard.
