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Quantization and code stream control method for image compressing transmission

A control method and code stream technology, applied in the fields of video communication, video information transmission and processing, can solve problems such as uneven distribution of quantization parameters, degradation of subjective quality of compressed images, and failure to consider human visual characteristics.

Inactive Publication Date: 2005-03-16
ZTE CORP
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Problems solved by technology

The advantage of TMN8 and TMN11 is that the control of the code rate is relatively stable, but its disadvantage is that the distribution of quantization parameters in one frame is not uniform enough, and the visual characteristics of the human eye are not considered, which will cause a decline in the subjective quality of the compressed image

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  • Quantization and code stream control method for image compressing transmission
  • Quantization and code stream control method for image compressing transmission
  • Quantization and code stream control method for image compressing transmission

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] figure 1 The system block diagram shown is a block diagram of a traditional encoder buffer quantization control method, from figure 1 It can be seen from the figure that this method performs quantization control at the macroblock level according to the fullness of the encoder buffer, and does not consider the importance of specific image information, which greatly affects the subjective quality of the image.

[0019] figure 2 Shown is a block diagram of an image coding system. The method for quantization and bit rate control in the present invention is located in the quantization and bit rate control module of the block diagram of the coding system. This improvement fully takes into account important information and Differences in the impact of secondary information on human vision, and corresponding control, highlighting important information, impr...

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Abstract

The present invention disclosed quantization and code steam control method for image compressing transmission in video communication field. The said method combines buffering area quantizing parameter control and predistortion theory and considers the visual features of human eye in time domain and space domain. The image of different property is predistorted in different mode, and through the two steps of frame level quantizing parameter control and macroblock level quantizing parameter control, high image compressing quality is provided in the condition of smooth code rate control. In addition, it is possible to avoid the lag of code stream control and raise code stream control effect.

Description

field of invention [0001] The invention relates to the field of video communication, in particular to the field of transmission and processing of video information. Background technique [0002] In the video information transmission system, a large number of video signals need to be transmitted, but due to the limitation of the bandwidth, it is impossible to transmit the video signal as it is, and the video signal must be compressed before the transmission of the video signal becomes possible. In video signal compression processing, quantization and code flow control are an indispensable and important link, which directly affect image compression efficiency and subjective image quality. Subjective image quality refers to the evaluation obtained in human vision due to the difference in the impact of important information and secondary information on human vision in an image. In the process of video signal compression processing, the quantization and code flow control usually...

Claims

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Application Information

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IPC IPC(8): G06T9/00
CPCG06T9/005
Inventor 火焰赵昕王陆方马王宁赵乘骥
Owner ZTE CORP
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