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US 10,757,432 B2Granted
Flexible band offset mode in sample adaptive offset in HEVC
AssigneeSony Corporation
InventorsEhsan Maani, Ali Tabatabai, Jun Xu
Life of this patent
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Abstract
A Flexible Band Offset (FBO) apparatus and method of performing Sample Adaptive Offset (SAO) filtering within encoders and decoders, such as according to the High Efficiency Video Coding (HEVC) standard, and similarly configured coding devices. The number of Band Offset (BO) modes and the number of necessary offsets is reduced. The invention beneficially provides simpler coding, reduces temporary buffer size requirements, and can yield a small performance gain over existing SAO techniques of HEVC test model HM 5.
Claims15
An encoding device, comprising:
- circuitry configured to:
- select a position of a head band of four consecutive bands, wherein
- the head band is a first band of the four consecutive bands out of 32 divided bands in a band offset mode, and
- each of the 32 divided bands corresponds to an intensity range of corresponding pixel values of an image;
- set position data that indicates the selected position of the head band;
- and
- encode the image and generate a bit stream that includes the set position data.
4 more elements
A method, comprising:
- selecting a position of a head band of four consecutive bands, wherein
- the head band is a first band of the four consecutive bands out of 32 divided bands in a band offset mode, and
- each of the 32 divided bands corresponds to an intensity range of corresponding pixel values of an image;
- setting position data that indicates the selected position of the head band;
- and
- encoding the image and generating a bit stream including the set position data.
3 more elements
Dependencies are inferred from the claim text.