H.264 inter-frame mode optimization method based on maximin MV (Music Video) difference value
A technology of minima and minima, optimization method, applied in the direction of television, electrical components, image communication, etc., can solve the problems of increasing algorithm complexity, affecting the efficiency and quality of video compression coding, reducing real-time coding, and reducing coding time. , Reduce algorithm complexity and video compression rate, and ensure the effect of high-definition video quality
Inactive Publication Date: 2012-08-22
CHONGQING UNIV
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When judging the inter-frame mode, search for each mode, and finally select the optimal mode encoding according to the rate-distortion theory. Although the rate-distortion performance is improved, the algorithm complexity is also greatly increased, and the real-time performance of the encoding is reduced.
Moreover, motion estimation accounts for more than half of the entire encoding calculation, which directly affects the encoding efficiency and quality of video compression.
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[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.
[0034] The traditional inter-frame mode prediction is to perform motion estimation and motion compensation on 7 modes from 16×16 to 4×4, and then obtain the optimal prediction mode according to the rate-distortion theory. However, various block modes are not equally probable distributions in image compression coding, and often have great differences. If the range of prediction modes is limited in advance, the search time and calculation amount can be greatly reduced. The present invention is based on this idea, and according to a certain threshold comparison result, some low-probability prediction modes are excluded in advance.
[0035] According to statistics, it sho...
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The invention discloses an H.264 inter-frame mode optimization method based on a maximin MV (Music Video) difference value, which comprises the following steps of: 1) reading a video frame to be coded, and dividing the video frame into 16*16 macro blocks; 2) carrying out repeated prior judgment in an SKIP mode on the current macro blocks which need to be coded, entering step 4) if the optimal coding mode of the macro blocks is in the SKIP mode, and entering step 3) if the optimal coding mode of the macro blocks is not in the SKIP mode; 3) according to the judgment method based on the maximin MV difference value, reducing an inter-frame mode selection range, and finally, selecting an optimal coding mode according to the rate distortion optimization theory; and 4) according to the determined optimal coding mode, coding the current coding block, and continuing to process the next coding block. According to the method, the algorithm complexity and the video compression rate can be greatly reduced on the premise of guaranteeing the video coding quality, and the coding instantaneity requirement can be satisfied.
Description
technical field [0001] The present invention relates to the field of video coding and compression, and is mainly proposed for the shortcomings of high-definition video data, such as large amount of data, slow processing speed, large limitations in practical applications, and H.264 algorithm, which improves coding efficiency and increases computational complexity. . Background technique [0002] The superiority of high-definition video is recognized, and it has the advantages of intuition, certainty, high efficiency, and extensiveness. However, due to the huge amount of information, it will cost a lot to store and transmit high-definition video information, so it is a key issue to compress and encode it efficiently. [0003] Traditional video compression coding standards mainly include H.261, MPEG-1, H.262, MPEG-2, MPEG-3, H.263, MPEG-4, etc. Purpose of compression encoding. MPEG and VCEG jointly developed a video compression coding standard with better performance than th...
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Login to View More IPC IPC(8): H04N7/26H04N7/50H04N19/103H04N19/61
Inventor 罗钧刘衍军杨晓花徐世成姜忠兵
Owner CHONGQING UNIV