Chroma quantization in video coding
地域：
CA
CA Cupertino
摘要
A method of signaling additional chroma QP offset values that are specific to quantization groups is provided, in which each quantization group explicitly specifies its own set of chroma QP offset values. Alternatively, a table of possible sets of chroma QP offset values is specified in the header area of the picture, and each quantization group uses an index to select an entry from the table for determining its own set of chroma QP offset values. The quantization group specific chroma QP offset values are then used to determine the chroma QP values for blocks within the quantization group in addition to chroma QP offset values already specified for higher levels of the video coding hierarchy.
說(shuō)明書
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The table 890 is an array that includes multiple entries. Each entry contains a set of chroma QP offsets that can be selected by any of the quantization groups in the picture. In this example, the table 890 includes entries 891-895, which correspond to chroma QP offset sets A, B, C, D, and E, respectively. In some embodiments, each one of the entries can be selected by any number of quantization groups or by none at all. In the example of
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