US Patent No. 9,270,990

METHOD FOR ENCODING AND DECODING IMAGES BASED ON CONSTRAINED OFFSET COMPENSATION AND LOOP FILTER, AND APPARATUS THEREFOR


Patent No. 9,270,990
Issue Date February 23, 2016
Title Method For Encoding And Decoding Images Based On Constrained Offset Compensation And Loop Filter, And Apparatus Therefor
Inventorship Jin Ho Lee, Daejeon-si (KR)
Hui Yong Kim, Daejeon-si (KR)
Sung Chang Lim, Daejeon-si (KR)
Jin Soo Choi, Daejeon-si (KR)
Jin Woong Kim, Daejeon-si (KR)
Assignee Electronics and Telecommunications Research Institute, Daejeon (KR)

Claim of US Patent No. 9,270,990

1. A method for decoding a video, the method comprising:
receiving a first constrained offset compensation indicator and a second constrained offset compensation indicator from an
encoding apparatus, wherein the first constrained offset compensation indicator indicates whether constrained offset compensation
across tile boundaries can be applied or not, and the second constrained offset compensation indicator indicates whether constrained
offset compensation across slice boundaries can be applied or not;

receiving a sample adaptive offset (SAO) compensation indicator from the encoding apparatus, wherein the SAO compensation
indicator indicates whether to perform SAO compensation;

receiving a SAO parameter from the encoding apparatus when the SAO compensation indicator indicates performing SAO compensation;
and

performing SAO compensation, using the SAO compensation indicator and the SAO parameter, on a sample across tile when the
first constrained offset compensation indicator indicates that constrained offset compensation across tile boundaries are
not applied and across slice when the second constrained offset compensation indicator indicates that constrained offset compensation
across slice boundaries are not applied,

wherein the performing SAO compensation comprises determining an offset category for the SAO compensation based on the first
constrained offset compensation indicator, the second constrained offset compensation indicator, and encoding parameters of
a target block of the SAO compensation, and at least one of neighboring blocks of the target block upon an edge offset being
applied to an offset compensation target sample within the target block.