Video decoding device, video encoding device, and recording medium

By clipping and optionally compressing motion vectors within a defined dynamic range, the method addresses memory and bandwidth challenges in video encoding/decoding, particularly for portable devices, enhancing efficiency and reducing resource requirements.

JP7883648B2Active Publication Date: 2026-07-01ELECTRONICS & TELECOMM RES INST
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Patent Information

Application Number
JP2025169426
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2012-01-31
Filing Date
2025-10-07
Publication Date
2026-07-01
Estimated Expiration
2032-01-31

AI Technical Summary

Technical Problem

Existing video compression technologies face challenges in efficiently storing and accessing motion vectors, particularly in environments with limited memory space, such as portable devices, due to the large memory requirements and high bandwidth needed for storing temporal motion vectors.

Method used

The method involves clipping motion vectors within a predetermined dynamic range, storing them in a buffer, and encoding/decoding using these clipped vectors, with the dynamic range defined by the video codec's bit depth, and optionally compressing or quantizing them to reduce memory requirements.

Benefits of technology

This approach reduces the memory space and memory access bandwidth needed for storing motion vectors, making it suitable for devices with limited resources while maintaining video encoding/decoding efficiency.

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Abstract

A method and apparatus for encoding / decoding video using motion vectors. The video decoding method includes the steps of generating a clipped motion vector by clipping a motion vector of a reference picture within a predetermined dynamic range, storing the clipped motion vector in a buffer, deriving a motion vector of a block to be decoded using the motion vector stored in the buffer, and performing inter-prediction decoding using the motion vector of the block to be decoded. According to the present invention, it is possible to reduce the memory space required to store the motion vector.
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Citation Information

Patent Citations

  • Image encoding method and image decoding method

    WO2011125211A1