Method and device for encoding and decoding images using adaptive deblocking filtering

Through adaptive deblocking filtering technology, the computational complexity and encoding complexity problems of image encoding and decoding in the prior art are solved, and the image quality and encoding efficiency are improved.

CN115134609BActive Publication Date: 2025-02-21DOLBY LABORATORIES LICENSING CORP
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Patent Information

Application Number
CN202210546225.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2015-06-11
Filing Date
2016-06-13
Publication Date
2025-02-21
Estimated Expiration
2036-06-13

AI Technical Summary

Technical Problem

In the existing image encoding and decoding technologies, inter prediction methods are complex in calculations, intra prediction methods are complex in encoding, and quantization processing leads to block artifacts and ringing phenomena in reconstructed pictures, and subjective definitions are degraded.

Method used

Adaptive deblocking filtering technology is adopted to generate reference picture lists through entropy decoder, prediction unit, adder and decoded picture buffer unit, perform inter prediction, generate reconstructed pictures, and loop filtering when necessary to improve image quality .

Benefits of technology

The performance and efficiency of the image processing system are improved, the block effect of intra prediction blocks or inter prediction blocks is reduced, and the subjective definition and encoding efficiency of reconstructed images are improved.

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Abstract

An image decoding device is disclosed, comprising: an entropy decoder for entropy decoding from a bit stream information required for generating a reference picture list for inter-frame prediction of a current picture and performing inter-frame prediction of a current block; a prediction unit for generating a reference picture list based on the information and performing inter-frame prediction of the current block based on the generated reference picture list; an adder for generating a reconstructed picture based on a prediction block generated by inter-frame prediction of the current block and a residual block of the current block; and a decoded picture buffer unit for storing the reconstructed picture, wherein the current block is one of a plurality of blocks belonging to the current picture, wherein the reference picture list is configured based on whether the current picture is included in the reference picture list and a slice type, wherein the decoded picture buffer unit comprises a first buffer and a second buffer.
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Citation Information

Patent Citations

  • Picture coding method and picture decoding method

    US20120213276A1

  • Features of intra block copy prediction mode for video and image coding and decoding

    WO2015054811A1