US 9,544,606 B2 · Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof

Abstract

A video decoding method includes extracting offset mergence information of a current largest coding unit (LCU), the offset mergence information indicating whether to adopt a second offset parameter as a first offset parameter of the current LCU; reconstructing the first offset parameter of the current LCU based on the offset mergence information, the first offset parameter including an offset type, an offset value, and an offset class of the current LCU; determining whether the current LCU is an edge type or a band type, based on the offset type; determining an edge direction according to the edge type or a band range according to the band type, based on the offset class; determining a difference value between reconstructed pixels and original pixels included in the offset class, based on the offset value; and adjusting pixel values of reconstructed pixels based on the difference value.

A video decoding method comprising:

determining whether an offset parameter of a current block is determined according to an offset parameter of a left block;
in response to determining that the offset parameter of the current block is determined according to the offset parameter of the left block, determining an offset type of a luma component of the current block using an offset type of a luma component of the left block and determining an offset type of a chroma component of the current block using an offset type of a chroma component of the left block;
in response to determining that the offset parameter of the current block is not determined according to the offset parameter of the left block, determining whether the offset parameter of the current block is determined according to an offset parameter of an upper block;
in response to determining that the offset parameter of the current block is determined according to the offset parameter of the upper block, determining the offset type of the luma component of the current block using an offset type of a luma component of the upper block and determining the offset type of the chroma component of the current block using an offset type of a chroma component of the upper block;
in response to determining that the offset parameter of the current block is not determined according to the offset parameter of the upper block, obtaining, from the bitstream, offset type information of the luma component of the current block and offset type information of the chroma component of the current block;
and
compensating for samples of the current block by using offset values,
wherein the obtaining, from the bitstream, offset type information of the luma component of the current block and offset type information of the chroma component of the current block comprises:
when the offset type information of the luma component of the current block indicates an edge offset type, obtaining, from the bitstream, luma offset values and a luma edge class indicating a direction of a luma edge of the current block and compensating for luma samples of the current block by using the luma offset values and the luma edge class;
when the offset type information of the chroma component of the current block indicates the edge offset type, obtaining, from the bitstream, chroma offset values and a chroma edge class indicating a direction of a chroma edge of the current block and compensating for chroma samples of the current block by using the chroma offset values and the chroma edge class;
when the offset type information of the luma component of the current block indicates a band offset type, obtaining, from the bitstream, the luma offset values, and compensating for the luma samples of the current block by using the luma offset values;
and
when the offset type information of the chroma component of the current block indicates the band offset type, obtaining, from the bitstream, the chroma offset values, and compensating for the chroma samples of the current block by using the chroma offset values.

10 more elements

Facts

Application

14/656,377Filed 12 Mar 2015 · continuation

Priority

22 Dec 2011

Published

US 2015/0189290 A12 Jul 2015

Granted

10 Jan 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04N 19/176
The unit being an image region, e.g. an object: the region being a block, e.g. a macroblock
H04N 19/117
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: filters, e.g. for pre-processing or…
H04N 19/136
Characterised by the element, parameter or criterion affecting or controlling the adaptive coding: incoming video signal characteristics or properties
H04N 19/14
Incoming video signal characteristics or properties: coding unit complexity, e.g. amount of activity or edge presence estimation

Family

Application61/579,389Us provisional application · filed 22 Dec 2011

PCT/KR2012/011275Parent of this continuation · filed 21 Dec 2012

US 2015/0189290 A1Pre-grant publication · published 2 Jul 2015

Application14/368,136Parent of this continuation

US 2014/0369420 A1Published application

US 9,571,843 B2Related patent

US 9,544,606 B2This patent

From the US filing history. Foreign family members aren’t listed.

Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof

Life of this patent

Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof

Life of this patent

Abstract

Claims1