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A joint time minimization method for slice-level encoding and decoding

A codec and minimization technology, applied in digital video signal modification, electrical components, image communication, etc., can solve the problem that the fragmentation method and location are not optimal for the decoding end, and achieve the minimum total time and meet the real-time requirements , the effect of load balancing

Inactive Publication Date: 2014-10-29
CENT SOUTH UNIV
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Problems solved by technology

[0004] However, the above method is only a separate parallel optimization for the encoding end or the decoding end. Since the video encoder and decoder have different module composition and computational complexity, the optimal fragmentation method and location of the encoding end are not important for the decoding end. often suboptimal

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  • A joint time minimization method for slice-level encoding and decoding
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  • A joint time minimization method for slice-level encoding and decoding

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Embodiment Construction

[0019] The present invention firstly uses the parallel encoder x.264 and the decoder FFmpeg conforming to the H.264 international video encoding standard, and uses a brute-force search algorithm to verify that different fragment positions will cause differences in the time spent on the encoding end and the decoding end. After analysis, we found that if this problem is ignored, as the load on the decoder increases, the performance of the system will also decrease accordingly. Therefore, for different numbers of encoders and decoders, it is necessary to implement adaptive segmentation of each frame to optimize the joint performance of the two.

[0020] The present invention constructs a simplified model of the joint encoder and decoder, such as image 3 As shown, assume that there is 1 encoder and 3 decoders in this model, and all decoders have the same computing power. Based on this model, the present invention proposes a system equation for testing the performance of the join...

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Abstract

The invention discloses a Slice level coding / decoding end combined time minimization method. A Slice level coding / decoding end combined time minimization model is adopted in the method and comprises a coder end and a plurality of decoder ends which are connected with the coder end. The invention provides the Slice level coding / decoding end combined time minimization model for describing, so that sum of the coding time and the decoding time is minimized to obtain a combined optimal value; and a Slice level parallel algorithm is used in a coder and decoders in accordance with H.264 international video coding standards to achieve combined optimization of the coding end and the decoding ends, so that the load of the coding / decoding ends is balanced, the required total time is minimum, and the requirement of a video communication system on realtimeness is well met.

Description

technical field [0001] The invention relates to the field of design and optimization of video codecs, in particular to a method for minimizing joint time of Slice-level codecs. Background technique [0002] In the field of video codec research, with the continuous improvement of the compression ratio, the computational complexity of the codec also rises rapidly, so the use of multi-core processors to achieve parallel codec has become a hot research topic. At present, video codec parallel technologies mainly include instruction-level parallelism (ILP), data-level parallelism (DLP) and thread-level parallelism (TLP). Among them, the main goal of thread-level parallelism (TLP) technology is to balance the load calculation in multi-core processors. According to the different thread granularity, it can be divided into GOP level, Frame level, Slice level and Macroblock level. [0003] Due to the independence of parameters between slices, it is relatively easy to implement paralle...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/436H04N19/176H04N19/192H04N19/61
Inventor 张昊朱小玉檀丰锋龙军
Owner CENT SOUTH UNIV