Invention Grant
- Patent Title: Method and apparatus for determining a context model for transform coefficient level entropy encoding and decoding
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Application No.: US14678621Application Date: 2015-04-03
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Publication No.: US09503752B2Publication Date: 2016-11-22
- Inventor: Yin-ji Piao , Jung-hye Min
- Applicant: SAMSUNG ELECTRONICS CO., LTD.
- Applicant Address: KR Suwon-si
- Assignee: SAMSUNG ELECTRONICS CO., LTD.
- Current Assignee: SAMSUNG ELECTRONICS CO., LTD.
- Current Assignee Address: KR Suwon-si
- Agency: Sughrue Mion, PLLC
- Main IPC: H04N7/18
- IPC: H04N7/18 ; H04N19/60 ; H04N19/91 ; H04N19/176 ; H04N19/186 ; H04N19/18

Abstract:
Provided are a method and apparatus for determining a context model for entropy encoding and decoding of a transformation coefficient. According to the method and apparatus, a context set index ctxset is obtained based on color component information of a transformation unit, a location of a current subset, and whether there is a significant transformation coefficient having a value greater than a first critical value in a previous subset, and a context offset c1 is obtained based on a length of a previous transformation coefficient having consecutive 1s. Also, a context index ctxids for entropy encoding and decoding of a first critical value flag is determined based on the obtained context set index and the context offset.
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