Model Correction for Cross-Channel Chroma Prediction

A new inter-channel coding mode named LM mode has been intensively explored in the HEVC standardization project. This mode predicts the chroma signal from the luma signal using a linear model whose parameters are inferred from neighboring reconstructed luma and chroma samples. Although this mode pre...

Full description

Saved in:
Bibliographic Details
Main Authors: Gisquet, C., Francois, E.
Format: Conference Proceeding
Language:English
Subjects:
Approximation methods
Correlation
cross-channel predictin
Encoding
HEVC
Image reconstruction
LM mode
Predictive models
Quantization (signal)
Transforms
video coding
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new inter-channel coding mode named LM mode has been intensively explored in the HEVC standardization project. This mode predicts the chroma signal from the luma signal using a linear model whose parameters are inferred from neighboring reconstructed luma and chroma samples. Although this mode presents very good coding efficiency, it is observed that ill cases in the linear parameters calculation can be detected and fixed. This paper gives an overview of the LM mode and presents a novel model correction scheme to detect and correct those ill cases. Simulation results show significant bit-rate savings by the proposed correction scheme with limited added complexity.
ISSN:1068-0314
2375-0359
DOI:10.1109/DCC.2013.10