Video Scaling Motion Estimation Method Based on Adaptive Factor
An adaptive factor and video scaling technology, which is applied in the direction of digital video signal modification, image communication, electrical components, etc., can solve the problems of inability to realize motion estimation/compensation, limit practicality, etc., and achieve adaptive scaling factor and fast operation speed , the effect of reducing computational complexity
Active Publication Date: 2021-07-13
LIAONING NORMAL UNIVERSITY
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This process involves a large number of fractional pixel interpolation operations, and its computational complexity is much higher than the full search of the block translation model, and it is impossible to achieve real-time motion estimation / compensation, which greatly limits its practicality
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[0028] A kind of video scaling motion estimation method of adaptive factor of the present invention is characterized in that carrying out according to the following steps:
[0029] Step 1. If all frames of the current Group of Picture (GOP) have been processed, the algorithm ends; otherwise, select an unprocessed frame in the current Group of Picture as the current frame , and use its previous frame as the reference frame ;
[0030] Step 2. If the current frame All the macroblocks of have been processed, then go to step 1; otherwise, select an unprocessed macroblock of the current frame As the current macroblock, let its size be pixel, , Indicates the abscissa and ordinate of the pixel in the upper left corner of the current macroblock, is a preset constant, in this embodiment, let ;
[0031] Step 3. According to the definition of the formula, calculate the motion compensation error corresponding to the zero vector :
[0032]
[0033] said Indicates ...
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The invention discloses a video scaling motion estimation method with adaptive factors. First, the motion compensation error corresponding to the motion vector (0,0) and (1,0) and the first-order horizontal autocorrelation of the reference frame are used to distinguish the to-be-predicted The scaling form of the macroblock, and then provides the calculation method of the optimal scaling ratio, which significantly reduces the number of bilinear interpolation operations and computing time; secondly, on the basis of the block matching motion estimation based on the translation model, combined with the most Optimizing the scaling ratio to obtain the scaling motion vector can break through the scaling range of the traditional scaling motion estimation, thereby improving the motion estimation accuracy. Compared with the traditional scaling motion estimation / compensation method, the peak signal-to-noise ratio of the present invention is increased by 4.54 dB on average, and the average peak signal-to-noise ratio of block matching full search is increased by 5.45 dB; the required calculation amount is higher than that of the traditional scaling motion estimation method The average reduction was 96.54%.
Description
technical field [0001] The invention relates to the field of video coding and compression, in particular to a video motion estimation method with fast computing speed, high motion compensation quality, and capable of effectively predicting the scaling motion existing in the video and having the adaptive scaling factor capability. Background technique [0002] Motion estimation is an effective temporal prediction technique, and most of the improvements in video coding efficiency over the years have been due to better motion estimation algorithms. However, the computing resources consumed by the motion estimation link often account for more than 50% of the total resources of the encoder, and even up to 80%. In order to achieve a better compromise between complexity and prediction accuracy, existing video coding standards generally use block matching motion estimation algorithms based on translation models, and have successively proposed a variety of fast block matching strateg...
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IPC IPC(8): H04N19/52H04N19/176H04N19/172H04N19/177H04N19/30
CPCH04N19/172H04N19/176H04N19/177H04N19/30H04N19/52
Inventor 宋传鸣闫小红王相海傅博
Owner LIAONING NORMAL UNIVERSITY