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Method for controlling transfer bit ratio

A technology of transmission bit rate and control method, applied in the field of bit rate control, can solve problems such as image quality degradation

Inactive Publication Date: 2007-02-07
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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)

Method used

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Embodiment Construction

[0062] The structure and function of the embodiment of the present invention will be described below with reference to the accompanying drawings. The structure and function of the present invention to be described in the accompanying drawing will be described through at least one embodiment. Therefore, the technical idea of ​​the present invention and its core composition and The effect is unlimited.

[0063] Generally, from the perspective of the human visual system (human visual system: HVS), it is difficult for human eyes to sensitively perceive the degradation of image quality after a scene transition.

[0064] Therefore, this invention reduces the picture quality produced by scene transitions, and applies the complexity used during scene transitions respectively, thereby minimizing the degradation of picture quality after scene transitions, as well as the complexity of the hardware, the amount of computation and the complexity of the hardware. Latency issues, which in tur...

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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...

Claims

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Application Information

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IPC IPC(8): H04N7/50H04N19/146H04N19/196
Inventor 徐丙赞
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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