ADJUSTING QUANTIZATION/SCALING AND INVERSE QUANTIZATION/SCALING WHEN SWITCHING COLOR SPACES

摘要

Innovations in adaptive encoding and decoding for units of a video sequence can improve coding efficiency when switching between color spaces during encoding and decoding. For example, some of the innovations relate to adjustment of quantization or scaling when an encoder switches color spaces between units within a video sequence during encoding. Other innovations relate to adjustment of inverse quantization or scaling when a decoder switches color spaces between units within a video sequence during decoding.

主权项

1. A computing device comprising:
one or more buffers configured to store an image or video; and an image encoder or video encoder configured to perform operations comprising:
encoding units of the image or video to produce encoded data, including, when switching from a first color space to a second color space between two of the units, adjusting quantization or scaling for color components of the second color space according to per component color space adjustment factors; andoutputting the encoded data as part of a bitstream.