Chroma slice-level QP offset and deblocking

摘要

In one example, an apparatus for processing video data comprises a video coder configured to, for each of the one or more chrominance components, calculate a chrominance quantization parameter for a common edge between two blocks of video data based on a first luminance quantization parameter for the first block of video data, a second luminance quantization parameter for the second block of video data, and a chrominance quantization parameter offset value for the chrominance component. The video coder is further configured to determine a strength for a deblocking filter for the common edge based on the chrominance quantization parameter for the chrominance component, and apply the deblocking filter according to the determined strength to deblock the common edge.

主权项

1. A method for processing video data, the method comprising:
decoding a first block of video data and a second block of video data, wherein the first block of video data and the second block of video data share a common edge; determining a first luminance quantization parameter for the first block of video data and a second luminance quantization parameter for the second block of video data; for each of one or more chrominance components, determining a chrominance quantization parameter offset value; for each of the one or more chrominance components, calculating a chrominance quantization parameter used to configure a chrominance component deblocking filter for the common edge based on the first luminance quantization parameter for the first block of video data, the second luminance quantization parameter for the second block of video data, and the chrominance quantization parameter offset value for the chrominance component; for each of the one or more chrominance components, determining a strength for the chrominance component deblocking filter for the common edge based on the chrominance quantization parameter used to configure the chrominance component deblocking filter for the common edge; and for each of the one or more chrominance components, applying the chrominance component deblocking filter according to the determined strength to deblock the common edge, wherein calculating the chrominance quantization parameter used to configure the chrominance component deblocking filter for the common edge comprises:
calculating an average of the first luminance quantization parameter for the first block of video data and the second luminance quantization parameter for the second block of video data; andapplying the chrominance quantization parameter offset value to the average.