Image encoding / decoding method and device

The intra-prediction method addresses inefficiencies in high-resolution and stereoscopic video encoding/decoding by utilizing a weighted sum of reference samples based on location and directionality, improving accuracy and efficiency.

WO2026106258A1PCT designated stage Publication Date: 2026-05-21DIGITALINSIGHTS INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
DIGITALINSIGHTS INC
Filing Date
2025-11-10
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing video compression technologies struggle to efficiently encode and decode high-resolution and stereoscopic video content, particularly in intra-prediction processes, leading to suboptimal accuracy and encoding/decoding efficiency.

Method used

An intra-prediction method that determines a reference sample for a current block by considering its location and directionality within the block, using a weighted sum of multiple reference samples from peripheral regions, including top-left, same vertical, and same horizontal lines, with adaptive selection based on intra-prediction mode and accessibility.

Benefits of technology

Improves prediction accuracy and reduces residual data by employing a weighted sum of reference samples, enhancing the encoding/decoding efficiency of intra-prediction processes.

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Abstract

An image decoding method and device, according to the present disclosure, may: derive a prediction sample of the current block on the basis of intra prediction; derive a residual sample of the current block; and reconstruct the current block on the basis of the prediction sample and the residual sample. Here, the prediction sample of the current block may be derived on the basis of a weighted sum of at least two reference samples belonging to a surrounding area of the current block.
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