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A method and system for optimizing code rate control using inter-frame prediction characteristics

A bit rate control and inter-frame prediction technology, applied in the field of video coding, can solve the problem of not considering the influence of qp arrangement order, which will affect the encoding effect, etc., and achieve the effect of optimizing the bit rate control algorithm

Active Publication Date: 2022-04-01
北京君正集成电路股份有限公司
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AI Technical Summary

Problems solved by technology

Therefore, the order of qp arrangement will affect the encoding effect
However, the existing code rate control does not consider the impact of the qp arrangement order on the encoding

Method used

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  • A method and system for optimizing code rate control using inter-frame prediction characteristics
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  • A method and system for optimizing code rate control using inter-frame prediction characteristics

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Embodiment Construction

[0029] Rate control is an important part of video coding technology. Video quality and transmission bandwidth are two considerations for rate control. The algorithm that gives priority to code rate is called cbr, and the algorithm that gives priority to quality is called vbr. The balance between encoding rate and quality is realized by adjusting qp.

[0030] The existing code rate control is adjusted in a single frame, and the size of qp is adjusted once in a frame. According to the feedback of the code rate of the current frame, the size of the qp of the next frame is determined. Such as figure 1 Shown is the relationship between rate control and encoding.

[0031] In addition, inter-frame prediction: the purpose of image compression is achieved by using the correlation between video image frames, that is, temporal correlation.

[0032] Reconstructed frame: The coded stream is decoded to obtain a frame.

[0033] Reference frame: The frame used as a reference during inte...

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Abstract

The present invention provides a method for optimizing code rate control by utilizing inter-frame prediction characteristics, said method comprising: (1) recording encoding information, recording the encoding information of each frame after encoding; (2) using the previous frame as a reference frame , using the previous frame as the reference frame for inter-frame prediction, and the quality of the previous frame is determined by the quantization parameter (qp) of the previous frame; (3) using the inter-frame prediction feature to adopt the quantization parameter (qp) of at least three consecutive frames ) to be sorted, the ordering legitimacy of the quantization parameter (qp) of the code rate control is stipulated as being illegal from large to small, and other sorting is legal; (4) selecting the sorting in step (3) as legally encoded.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method and system for optimizing code rate control using inter-frame prediction characteristics. Background technique [0002] Today's society is a highly digital society, and video coding technology has been widely used in many fields, such as cable TV, digital broadcasting, video conferencing, etc. In the application process, the data processing of the computer must cooperate with the processing of video information and the transmission of the network, and the audio-visual quality must reach the acceptable range of people's general level. In order to save transmission bandwidth and storage space, video coding technology has always been the focus of scientific research. To obtain better image quality under the constraints of bandwidth, delay, cache, etc., to efficiently transmit encoded data at a bit rate, while ensuring good and stable quality, bit rate control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/124H04N19/184
CPCH04N19/124H04N19/184
Inventor 张传兵
Owner 北京君正集成电路股份有限公司