High Dynamic Range Non-Constant Luminance Video Encoding and Decoding Method and Apparatus

摘要

Compounding reproduction errors in the luminance of a pixel encoded by a non-constant luminance video encoder is High Dynamic Range (HDR) video content, which is starting to become more widely supported by commercially available display devices. HDR video content contains information that covers a wider luminance range than traditional, non-HDR video content known as Low Dynamic Range (LDR) video content. The present disclosure is directed to an apparatus and method for reducing errors in reproduced luminance of HDR video content (and other types of video content) at a video encoder and/or video decoder due to non-constant luminance video encoding.

主权项

1. An encoder, comprising:
a spatial low-pass filter; a filter controller configured to control the spatial low-pass filter to provide more spatial smoothing to a green component of a first pixel than to a green component of a second pixel based on a color of the first pixel being closer to a red or blue vertex of a color gamut than a color of the first pixel; a perceptual transfer function configured to perceptually quantize the green component of the first pixel after the green component has been spatially low-pass filtered by the spatial low-pass filter to provide a perceptually quantized first color component; a decomposition transformation matrix configured to transform the perceptually quantized green color component, a perceptually quantized red color component, and a perceptually quantized blue color component into a luma component and chroma components; and a subsampling filter configured to subsample the chroma components.