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A Search Method and Device for Time Domain Prediction Parameters

A time-domain prediction and search method technology, applied in the field of video coding, can solve the problems of increasing coding complexity and coding time, consuming a large amount of calculation, and complicated calculation process, so as to save calculation amount, reduce calculation complexity, and improve The effect of coding efficiency

Active Publication Date: 2018-12-18
BEIJING QIYI CENTURY SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the motion estimation process and the calculation process of the rate-distortion cost or Hadamard cost are relatively complicated, so exhaustively all the motion estimation processes and the calculation of the rate-distortion cost or Hadamard cost for each of the two inter-coding modes The calculations spent require complex calculations and consume a large amount of calculations, thus increasing the complexity and encoding time of encoding

Method used

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  • A Search Method and Device for Time Domain Prediction Parameters
  • A Search Method and Device for Time Domain Prediction Parameters
  • A Search Method and Device for Time Domain Prediction Parameters

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Embodiment 1

[0053] refer to figure 1 , which shows a flow chart of the steps of Embodiment 1 of a method for searching time-domain prediction parameters according to the present invention, which may specifically include:

[0054] Step 101: Determining the best motion parameter of the merging mode for the CU, and determining the best merging mode of the CU;

[0055] In a specific implementation, the step of determining the optimal motion parameter of the merging mode for the coding unit and determining the best merging mode of the coding unit may specifically include the following sub-steps:

[0056] Sub-step A1, perform merge mode motion parameter estimation on the current coding unit, and generate five merge mode prediction parameters;

[0057] In an application example of the present invention, the merge mode motion parameter estimation of the current coding unit can generate up to 5 sets of motion parameters (such as reference index and motion vector, etc.), and the present invention ...

Embodiment 2

[0084] refer to Figure 4 , which shows a flow chart of steps in Embodiment 2 of a method for searching time-domain prediction parameters according to the present invention, which may specifically include:

[0085] Step 401: Determining the best motion parameter of the merging mode for the CU, and determining the best merging mode of the CU;

[0086] Step 402. Determine the total Hadamard cost of the best combination mode of the coding unit; the total Hadamard cost of the best combination mode is the Hadamard cost of the best combination mode and the index cost of the best combination mode and, wherein the index cost is the product of the Lagrangian parameter and the number of bits corresponding to the optimal merge mode index;

[0087] Step 403, when the Hadamard total cost of the best merge mode satisfies the first termination condition, determine that the prediction parameter of the best merge mode is the best time-domain prediction parameter of the current coding unit;

...

Embodiment 3

[0118] refer to Figure 5 , showing a flow chart of steps in Embodiment 3 of a search method for time-domain prediction parameters according to the present invention, which may specifically include:

[0119] Step 501: Determining the best motion parameter of the merging mode for the CU, and determining the best merging mode of the CU;

[0120] Step 502. Determine the total Hadamard cost of the best combination mode of the coding unit; the total Hadamard cost of the best combination mode is the Hadamard cost of the best combination mode and the index cost of the best combination mode and, wherein the index cost is the product of the Lagrangian parameter and the number of bits corresponding to the optimal merge mode index;

[0121] Step 503, when the Hadamard total cost of the best merge mode satisfies the first termination condition, determine that the prediction parameter of the best merge mode is the best time-domain prediction parameter of the current coding unit;

[0122]...

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Abstract

The embodiment of the invention provides a searching method and a searching device for time-domain predictive parameters, wherein the searching method for the time-domain predictive parameters comprises the following steps: determining combined-mode optimal movement parameters of a coding unit, and determining an optimal combining mode of the coding unit; determining Adama total cost of the optimal combining mode of the coding unit, wherein the Adama total cost of the optimal combining mode of the coding unit is sum of Adama cost of the optimal combining mode and the index cost of the optimal combining mode, the index cost is product of a lagrange parameter and a bit number corresponding to the optimal combining mode index; while the Adama total cost of the optimal combining mode meets the first ending condition, determining the predictive parameters of the optimal combining mode as optimal time-domain predictive parameters of an existing coding unit. The searching method can be used for reducing complexity of inter-frame coding and improving the coding efficiency.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a search method and device for time-domain prediction parameters. Background technique [0002] HEVC (High Efficiency Video Coding, high-efficiency video coding standard) is a new generation of video coding standard, which aims to solve people's increasing demand for visual and auditory quality. [0003] HEVC has two inter-frame coding modes, one is the merge (Merge) mode, the merge mode uses the motion parameters of the temporally adjacent coded units to obtain the motion parameters (including reference index and motion vector) of the current coding unit, and Merge The index is encoded into the code stream; the other is the motion estimation mode. For the current coding unit, the motion estimation mode generally has two reference columns, the forward reference column (List0) and the backward reference column (List1), and each reference column can be There are one o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/109H04N19/105H04N19/577
Inventor 朱洪波
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD