Encoding and decoding method and apparatus

By determining the conditions of the current block in the encoding and decoding methods and performing inverse conversion skipping or DCT2 inverse conversion processes, the application scope limitation of the ISTS method is solved, and the encoding performance and decoding efficiency of screen content encoded video are improved.

JP7864759B2Active Publication Date: 2026-05-25HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
View PDF 4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
Filing Date
2024-04-03
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

The existing Implicit Selection of Transform Skip (ISTS) method is only applicable to Intrinsic Prediction Mode and IBC Mode, which limits its application scope and cannot effectively improve the coding performance of Screen Content Coding (SCC) video.

Method used

By determining whether the current block meets the conditions for the transition skip mode in the encoding and decoding methods, and performing the inverse transition skip process or the DCT2 inverse transition process when the conditions are met, the application scope of ITS is expanded to include different prediction modes, luma blocks and blocks of specific sizes.

Benefits of technology

This expands the application scope of ISTS, improves the encoding performance of screen content encoded video, and reduces decoding time.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 0007864759000005
    Figure 0007864759000005
  • Figure 0007864759000006
    Figure 0007864759000006
  • Figure 0007864759000007
    Figure 0007864759000007
Patent Text Reader

Abstract

To provide coding and decoding methods and apparatuses that improve the flexibility and controllability of the application of implicit selection of transform skip mode (ISTS) means, expand the application range of the ISTS means, improve encoding performance and reduce decoding delay.SOLUTION: An image processing method which can be applied to a coding device or decoding device includes: determining a prediction mode of a current block; and when it is determined that the prediction mode of the current block satisfies one of the conditions that the prediction mode of the current block is an inter prediction mode and the prediction mode of the current block is a direct mode, determining that the current block satisfies transform skip mode conditions.SELECTED DRAWING: Figure 5
Need to check novelty before this filing date? Find Prior Art