The novel features of the invention are set forth in the appended claims. However, for purpose of explanation, several embodiments of the invention are set forth in the following figures.
FIG. 1 illustrates a hierarchical video coding structure 100 that includes chroma quantization groups with each having its own set of chroma QP offset specifications.
FIGS. 2a-c illustrates several methods for encoding a set of chroma QP offset values for a chroma quantization group.
FIG. 3 illustrates an example picture header or picture parameter set (PPS) that specifies a definition of a chroma quantization group.
FIG. 4 illustrates an example coding tree unit that can be in a chroma quantization group.
FIG. 5 illustrates the specification of additional chroma QP offsets within a quantization group.
FIG. 6 illustrates the specification of additional chroma QP offsets within a quantization group using a different method for specifying the chroma QP offset values for the two chroma components.
FIG. 7 conceptually illustrates a process for determining chroma QP values from a video bitstream that allows additional chroma QP offset specifications.
FIG. 8 illustrates a hierarchical video coding structure that includes a table of possible chroma QP offset values at a higher level header.
