Title:
COEFFICIENT CODING/DECODING METHOD, ENCODER, DECODER, AND COMPUTER STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2022/188239
Kind Code:
A1
Abstract:
A coefficient coding/decoding method, an encoder, a decoder, and a computer storage medium. The method comprises: analyzing a code stream by using an adaptive binary arithmetic coding mode of a first context model on the basis of the position of a quantization coefficient to be decoded, to obtain a value of non-zero identification information (S401); when the value of the non-zero identification information is a first value, analyzing a code stream by using an adaptive binary arithmetic coding mode of a second context model, to obtain a value of X preset identification information, wherein X is a natural number greater than zero (S402); and when the value of the X preset identification information is a second value, determining, according to the value of the non-zero identification information and the value of the X preset identification information, the absolute value of a reconstruction quantization coefficient corresponding to the position of said quantization coefficient (S403). According to the method, the adaptive coding characteristics can be better utilized during coding/decoding, such that a code rate can be saved, thereby improving coding/decoding performance.
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Inventors:
HUANG HANG (CN)
WANG FAN (CN)
XIE ZHIHUANG (CN)
YUAN QICHAO (CN)
WANG FAN (CN)
XIE ZHIHUANG (CN)
YUAN QICHAO (CN)
Application Number:
PCT/CN2021/087922
Publication Date:
September 15, 2022
Filing Date:
April 16, 2021
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
H04N19/103; H04N19/13
Foreign References:
| US20090232204A1 | 2009-09-17 | |||
| CN112449201A | 2021-03-05 | |||
| CN110710217A | 2020-01-17 | |||
| CN104581154A | 2015-04-29 | |||
| CN102186087A | 2011-09-14 |
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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