Method for controlling transfer bit ratio

Abstract

The invention relates to a bit rate control method for converting the variable bit generated by MPEG dynamic image encode into fixed bit to be transmitted. And the invention can avoid additional view converter, and uses the complexity of picture whose point is coded to check the view conversion condition; and the picture complexity after conversion can be calculated out by referring the converted picture, to improve the quality of converted picture most, and reduce the complexity of hardware, and it can avoid bit buffer overflow. And it has high calculation speed and lower cost.

Description

【Technical field】 [0001] This invention refers to a bit rate control method for converting a variable bit rate generated by MPEG series video encoding into a fixed bit rate for transmission. 【Background technique】 [0002] Since the storage and transmission of moving images requires a lot of resources, a technology for storing and transmitting them after compression and encoding is required. [0003] MPEG (Moving Picture Experts Group: Moving Picture Experts Group) is a standard widely used for this purpose. That is, the MPEG encoder used to compress and encode moving images can realize variable-length encoding brought about by discrete cosine transform (DCT) post-quantization, activity estimation and compensation techniques, and symbol generation probability, which also includes the use of Bit rate control for fixed bit rate transmissions. [0004] At this time, the algorithm mainly used for the above-mentioned MPEG encoder refers to the MPEG-2 data ( The method proposed...

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Problems solved by technology

[0035] So, if figure 2 As shown, if the scene transition is not considered in the image group that generates the scene transition, and the complexity is brought from the previous pictures for encoding, the problem of image quality degradation caused by the scene transition will become serious, and the impact will also be It will continue to affect other pictures in the picture group, making the problem of image quality degradation more serious, which will also cause the problem of bit buffer overflow (bit buffer overflow)

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