Statistical multiplexing method based on parallel coding
A statistical multiplexing and coding technology, applied in the field of statistical multiplexing based on parallel coding, can solve the problems of increasing system delay, changing the code stream quality of the encoder, and high system complexity, so as to achieve the effect of improving efficiency and image subjective quality
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[0041] The encoder takes AVS as an example, and it is applicable to encoding standards such as H.264 and MPEG4.
[0042] Assuming an application scenario, in a head-end system, there are 4 AVS encoders, which encode 4 sets of programs respectively, including CCTV1, CCTV5, CCTV10, and CCTV12, wherein CCTV5 is a high-priority program. Through the method of the present invention, no In the case of changing the existing head-end system, the optimization of the subjective quality of the image can be realized while making full use of the 6M bandwidth.
[0043] The method is to allocate 6M bandwidth to 4 programs. According to the priority arrangement, CCTV1 is allocated 1.8M, CCTV5 is allocated 2M, CCTV10 is allocated 1.2M, and CCTV12 is allocated 1.0M. According to these requirements, four types are set for the corresponding encoders. Different code rates, CCTV1 encoder is set to 2.0M, 1.8M, 1.5M, 1.2M, CCTV5 encoder is set to 2.5M, 2.2M, 2.0M, 1.8M, CCTV1 encoder is set to 1.6M, 1...
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