An Adaptive Loop Filtering Method Based on Parallel Computing
An adaptive loop and adaptive filtering technology, which is applied in the field of video encoding and decoding, can solve the problems of insufficient computing speed and the need to improve the filtering efficiency, so as to improve the filtering efficiency of the adaptive loop, improve the operating speed and related performance indicators , the effect of high speedup ratio
Inactive Publication Date: 2018-08-28
SUN YAT SEN UNIV
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[0008] Although adaptive loop filtering has the above advantages, its operation speed is not fast enough, and the filtering efficiency needs to be improved.
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[0037] Such as Figure 1-3 As shown, an adaptive loop filtering method based on parallel computing adopts CUDA (Universal Parallel Computing Architecture) technology and uses a hybrid architecture of CPU+GPU. The CPU device is responsible for the control of the filtering process, and the GPU device is responsible for the relevant The computation of data, described algorithm comprises the following steps:
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The invention provides a method for adaptive loop filter based on parallel computing. The used parallel computing is mainly a multi-thread production line parallel mode based on a GPU device of a compute unified device architecture (CUDA). Through in-depth research of an original adaptive loop filter algorithm in the video coding and decoding standard AVS2, it is found that pixel processing has a certain independence and low coupling degree in filtering processing, the characteristics are very suitable for processing on the GPU device, and the characteristics that multi-thread production lines are parallel are brought into full play. By modification of a relevant processing process, the characteristic that the complex computation problem can be solved through the GPU device is applied, a CUDA technology is adopted for redesign, and the adaptive loop filter algorithm can run on the GPU device. A high speed-up ratio is obtained, and the adaptive loop filtering efficiency is improved, so as to improve running speed and relevant performance indexes of a whole codec.
Description
technical field [0001] The present invention relates to the field of video coding and decoding, and more specifically relates to an adaptive loop filtering algorithm based on parallel computing. Background technique [0002] According to the 37th China Internet Development Statistical Report, as of December 2015, the number of online video users in China reached 504 million, an increase of 70.93 million compared with the end of 2014, and the utilization rate of online video users was 73.2%, an increase of 6.5 compared with the end of 2014 percentage point. At the same time, with the widespread development of domestic smart phones, the price of mobile phones continues to decrease, and the status of mobile terminals as the entrance to the Internet continues to increase. Whether it is WiFi or mobile 4G network, its technology has made great progress and is widely used, and the network bandwidth is also constantly improving. This has led to a substantial increase in video on m...
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IPC IPC(8): H04N19/436H04N19/82H04N19/117
CPCH04N19/117H04N19/436H04N19/82
Inventor 纪庆革高向梁凡
Owner SUN YAT SEN UNIV