Method and apparatus for encoding and decoding image signals

By efficiently encoding and decoding the local block coefficients in the image signal, the problem of low image compression efficiency in the prior art is solved, and a more efficient image compression and decoding process is realized.

CN113810697BActive Publication Date: 2025-04-25IND ACAD COOP GRP OF SEJONG UNIV
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Patent Information

Application Number
CN202111059916.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2017-04-18
Filing Date
2017-04-26
Publication Date
2025-04-25
Estimated Expiration
2037-04-26

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Abstract

The present invention provides a method and device for encoding and decoding an image signal. The method for encoding an image signal according to the present invention can perform the following operations: encoding a local block coefficient flag indicating whether a coefficient of a current local block is a non-zero coefficient; encoding a first flag indicating whether the absolute value of the coefficient is greater than 1; encoding a second flag indicating whether the absolute value of the coefficient is greater than 2; encoding the remaining coefficients in the current local block that are not encoded based on the first flag or the second flag; and encoding the code of the coefficient of the current local block.
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Citation Information

Patent Citations

  • Method for generating prediction block in short distance intra prediction

    KR1020130029695A

  • Method of encoding intra mode by choosing most probable mode with high hit rate and apparatus for the same, and method of decoding and apparatus for the same

    KR1020130068479A