Signaling of scaling list

摘要

In one embodiment, a method determines when a scaling list for a non-default quantization matrix is being used to perform quantization of one or more units of video. Transform unit sizes are determined that are not available for performing a transform of the one or more units of video. Then, the method encodes or decodes scaling list data for each of the transform unit sizes available for performing the transform of the one or more units of video. The scaling list data is for transform unit sizes not available for performing the transform of the one or more units of video are not encoded or decoded.

主权项

1. A method comprising:
determining, by a processor in response to instructions stored on a non-transitory computer readable medium, whether to use a scaling list for a non-default quantization matrix to perform quantization of one or more units of video; identifying a plurality of transform unit sizes; determining a set of unavailable transform unit sizes from the plurality of transform unit sizes that are unavailable for performing a transform of the one or more units of video, wherein determining the set of unavailable transform unit sizes includes:
determining a minimum transform unit size for the one or more units of video,determining a maximum transform unit size for the one or more units of video, andincluding each transform unit size from the plurality of transform unit sizes in the set of unavailable transform unit sizes on a condition that the respective transform unit size exceeds a range from the minimum transform unit size to the maximum transform unit size, and omitting each transform unit size from the plurality of transform unit sizes from the set of unavailable transform unit sizes on a condition that the respective transform unit size is within the range; determining a set of available transform unit sizes from the plurality of transform unit sizes that are available for transforming the one or more units of video; generating encoded scaling list data by encoding scaling list data for each available transform unit size from the set of available transform unit sizes; and including the encoded scaling list data in an output bitstream, such that the output bitstream omits scaling list data for the set of unavailable transform unit sizes.