Parallel mode decision device and method based on AVS (Audio Video Standard)
A mode and inter-frame mode technology, applied in the field of digital video encoding and decoding, can solve the problems of large data processing and low encoding efficiency, and achieve the effect of improving efficiency, improving utilization, and satisfying high-definition real-time encoding.
Active Publication Date: 2013-09-04
联合信源数字音视频技术(北京)有限公司
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[0004] In order to overcome the defects of large data processing and low encoding efficiency of existing encoders, the present invention proposes an AVS-based parallel mode decision-making device and method
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[0020] An AVS-based parallel mode decision device and method provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] The data to be processed in the mode decision includes 6 modes including inter16x16, inter16x8, inter8x16, inter8x8, intra and direct16x16. Among them, there is a certain correlation in the intra prediction, which leads to a certain waiting time interval in the intra brightness decision in the mode decision process. Except for the other 5 modes of intra, there is no correlation between the data. Therefore, in order to control the cost of using hardware resources, only one pipeline is used in the mode decision-making part to receive the data input of the above-mentioned 6 modes for mode decision-making.
[0022] In the device of the present application, the data processed by the mode decision includes 6 modes of data, and when processing the 6 modes of data, each clock inp...
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The invention provides a parallel mode decision device based on an AVS (Audio Video Standard), which comprises a data selection device, a distortion factor processing device, a precoding device and a decision device, wherein the data selection device is used for selecting predication data from external devices of inter, intra and direct; the distortion factor processing device is used for receiving the predication data transmitted by the data selection device to calculate the distortion factor of the prediction data; the precoding device is used for calculating the bit number of the prediction data according to the quantized predication data transmitted by the distortion factor processing device; and the decision device is used for carrying out mode decision according to the distortion factor and the bit number of the prediction data. According to the parallel mode decision device disclosed by the invention, the precedence order of the decision mode is reasonably changed so as to improve the utilization rate of a coder to the time; and on the other hand, by adopting high parallelism degree for processing, the efficiency of processing data is remarkably improved, so that the device meets the requirement for high-definition real-time coding.
Description
technical field [0001] The present invention relates to the technical field of digital video coding and decoding, and more specifically, the present invention relates to an AVS-based parallel mode decision device and method. Background technique [0002] The AVS standard is a new type of video coding technology with independent property rights and independent innovation in my country. At present, the video part (AVS-P2) has become a national standard. AVS video encoding is oriented to high-definition broadcast TV and audio and video discs. Since a large amount of data information is processed per unit time in real-time encoding, it is almost impossible to implement pure software encoding, and hardware acceleration of the encoder is required. [0003] In the second-generation video standard, a rate-distortion optimization (Rate Distortion Optimizaton, RDO) decision criterion is introduced. This criterion establishes a cost function cost=D+λR for each mode of predicted data, ...
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IPC IPC(8): H04N7/26H04N7/32H04N19/109H04N19/124H04N19/147
Inventor 邓磊呼大明宋益波郑海鸥王佳薇
Owner 联合信源数字音视频技术(北京)有限公司