Method for rapidly determining intra-frame prediction mode of video code and device thereof

A technology of intra-frame prediction mode and prediction mode, which is applied in the field of video coding and can solve problems such as low operating efficiency, complicated calculation process, and high hardware cost

Active Publication Date: 2015-09-30
ACTIONS ZHUHAI TECH CO
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Problems solved by technology

[0007] Embodiments of the present invention provide a method and device for quickly determining an intra-frame prediction mode of video coding, which are used to solve the problems in the prior art that the PU division of an I frame and the selection and calculation process of the prediction mode are complicated and the operation efficiency is low. The problem of high hardware cost

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  • Method for rapidly determining intra-frame prediction mode of video code and device thereof
  • Method for rapidly determining intra-frame prediction mode of video code and device thereof
  • Method for rapidly determining intra-frame prediction mode of video code and device thereof

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[0160] Still with Figure 4 As an example, after starting to calculate the target prediction mode of the current LCU, divide the current LCU into 4 BUs and determine whether to perform parallel calculations. If so, calculate the prediction modes of PUs in BU0-BU3 at the same time: first calculate each BU The target prediction mode of the 4*4 PU of the lowest level in the starting position; then calculate the target prediction mode of the remaining 3 4*4 PUs, and start the target of the 8*8 PU of the higher level at the starting position Prediction mode; calculate the target prediction mode of the next 8*8 PU and internal 4*4 PU; and repeat this step until the target prediction modes of all PUs at all levels have been calculated; otherwise, proceed to the first The target prediction mode of the 4*4 PU at the lowest level of the starting position in BU (BU0); then calculate the target prediction mode of the remaining 3 4*4 PUs, and start the 8*8 higher level of the starting positi...

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Abstract

The present invention discloses a method for rapidly determining the intra-frame prediction mode of a video code and a device thereof to solve the problems of complex selection and calculation process, low operation efficiency and high hardware cost of a prediction mode in the prior art. According to the method, the target prediction mode of each PU is orderly calculated based on the data of the PU adjacent to a current LCU and a result obtained through calculation, the PU which is not at the start position of the corresponding BU is calculated, the candidate prediction mode of the PU is obtained according to the target prediction mode of the adjacent PU of the PU, the PU of each layer at the corresponding BU start position is calculated, and the candidate prediction mode of the PU is obtained according to the target prediction mode of a lower layer PU. In this way, the optimal segmentation approach and prediction mode of the current LCU can be rapidly obtained, while all prediction modes are retained and the coding performance is ensured, the coding efficiency is increased, the running time is saved, at the same time the hardware cost is reduced, and the resource overhead is greatly saved.

Description

Technical field [0001] The present invention relates to the field of video coding, in particular to a method and device for quickly determining an intra-frame prediction mode of video coding. Background technique [0002] The data volume of unencoded and compressed moving images and videos is very large. In the process of transmission and storage, it is easy to cause the problems of communication bandwidth and data storage capacity. Therefore, when processing moving images and videos, you must The data is encoded. High-Efficiency Video Coding (HEVC\H.265) is a new generation of video coding standard, which can greatly improve coding and compression efficiency. On the basis of H.264, many new functions have been introduced, including: Maximum coding unit (Large Code Unit, LCU), prediction unit (Prediction Unit, PU), and transformation unit (Transfer Unit, TU) multi-level segmentation, PU asymmetric segmentation, intra-frame multi-prediction mode, etc. Because intra-frame predict...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/50H04N19/105
Inventor 桂海田杨少军
Owner ACTIONS ZHUHAI TECH CO
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