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Code rate control method and device

A bit rate control and frame coding technology, applied in the field of bit rate control methods and devices, can solve the problem of high computational complexity of bit rate control

Active Publication Date: 2019-10-25
XIAN WANXIANG ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Embodiments of the present disclosure provide a code rate control method and device, which can solve the problem of excessive computational complexity in existing code rate control

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  • Code rate control method and device
  • Code rate control method and device

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Embodiment Construction

[0074] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0075] An embodiment of the present disclosure provides a code rate control method, such as figure 1 As shown, the code rate control method includes the following steps:

[0076] Step S10, divide a frame of image into at least one pixel macroblock, and extract the macroblock feature of each macroblock; wherein, the macroblock feature includes the basic number of pixels n bc and the n...

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Abstract

The invention provides a code rate control method and device, and relates to the field of computer image transmission, and the method comprises the steps: dividing a frame of image into at least one pixel macro block, and extracting the macro block features of each macro block, wherein the macro block features comprise a basic pixel number nbc and a high-gradient pixel number nhg; determining a corresponding macro block type according to the obtained macro block characteristics, wherein the macro block type comprises a character macro block and a picture macro block; and selecting a charactermacro block factor delta 1 and a picture macro block factor Q according to a preset formula and a preset rule, and taking delta 1 and Q as quantization parameters of the frame coding. According to theinvention, the problem of over-high calculation complexity in the existing code rate control can be solved.

Description

technical field [0001] The present disclosure relates to the field of computer image transmission, in particular to a code rate control method and device. Background technique [0002] In the field of video compression transmission, real-time video transmission application scenarios represented by live broadcast and video conferencing are becoming more and more important, followed by more and more high-definition video sources such as 2K and 4K, but the network The development of bandwidth is far behind the requirements of practical applications, resulting in a poor effect of the entire compressed transmission. In the process of video compression and transmission, the code stream length generated by the encoder directly affects the quality of the decoded and restored image. Generally speaking, at the same resolution, the larger the code stream of the video file, the smaller the compression ratio and the better the picture quality. Bit rate control technology is one of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/146H04N19/176H04N19/186H04N19/184H04N19/124H04N19/147
CPCH04N19/124H04N19/146H04N19/147H04N19/176H04N19/184H04N19/186
Inventor 杨鹏飞范志刚
Owner XIAN WANXIANG ELECTRONICS TECH CO LTD
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