H.264 variable bit rate control method based on Matthew effect
A control method and Matthew effect technology, applied in the field of H.264 variable bit rate control, can solve the problems of increasing the number of bits, etc., and achieve the effect of low complexity, good visual effect, and retaining visual effect
Inactive Publication Date: 2009-09-09
江苏儒灵童文化产业集团有限公司
View PDF0 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This leads to egalitarianism, that is, the fixed area in the image originally needs fewer bits, and the number of bits in the area will be increased; the moving area originally needs more bits, and the number of bits in the area will be reduced. , the statistics of the non-zero coefficients of macroblocks and the number of bits used in an image of the Carphone sequence shows that this method does not allocate the code rate according to the visual characteristics of the human eye. The human eye is sensitive to changing information, but it is often used for large static areas Not concerned
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The present utility model will be further explained below in conjunction with the drawings and embodiments.
[0017] The present invention decides the allocation of the code rate according to the change of the image scene. More bits are allocated for large image scene changes, and fewer bits are allocated for less image scene changes, thereby being more conducive to preserving image detail information.
[0018] In the compression process, the code rate is allocated according to the Matthew effect. In the H.264 compression process, the image layer and the macro block layer are allocated more bit streams for images with large motion and more details.
[0019] In variable bit rate coding, the bit rate allocation is determined according to the amount of motion and motion details during rate control. A bit stream with a large amount of motion is allocated higher bits, and a smaller amount of motion is allocated a lower bit rate.
[0020] The invention adopts a control method in ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to an H.264 variable bit rate control method based on Matthew effect, in particular to a method for bit rate allocation according to the rules of human eyes in the H.264 compression process. The control method comprises a method for determining the quantization step of an image layer, and a method for determining the quantization step of a macroblock layer. The method for determining the quantization step of the image layer is characterized in that in the P frame, if the bit rate of the current coded frame is two times larger than the bit rate of the prior frame, the quantization step is reduced by one to improve the accuracy of quantization; and if the bit rate of the current coded frame is 1 / 2 smaller than the bit rate of the prior frame, the quantization step is increased by one to reduce coded data. The H.264 variable bit rate control method can reserve sensitive data of human eyes, accords with universal Matthew effect rules, can carry out bit rate allocation in an image level and a basic unit level, and can adjust the bit rate in a self-adapting mode according to the conditions of image sequences. The experiment indicates that the complexity of the algorithm is low, and the data of sensitive areas of human eyes can be better reserved.
Description
Technical field [0001] The invention relates to a H.264 variable code rate control method based on Matthew effect, in particular to a method for code rate allocation according to the law of human eyes in the H.264 compression process. Background technique [0002] Rate control is an important part of the video encoder. In the video encoding process, the output video quality and bit rate affect each other. If the output video quality is required to be better, the higher the bit rate needs to be output. Due to the limitation of network bandwidth or storage capacity, the output bit number of the video encoder needs to be controlled within a certain range, so as to obtain the best video quality as much as possible while meeting the bandwidth or storage capacity limitation. The control adopted here The strategy is rate control. It can be seen that the quality of the rate control strategy is one of the key factors for the success of a video encoder. [0003] H.264 is the latest block-b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/146H04N19/70
Inventor 李恒中夏卫平
Owner 江苏儒灵童文化产业集团有限公司