Code rate control method fusing image features

A technology of rate control and image fusion, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of inapplicable rate control strategy, insufficient rate control accuracy, and no allocation of code rate.

Active Publication Date: 2015-10-21
NINGBO UNIV
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Problems solved by technology

However, this rate control algorithm does not take into account the characteristics of the video image, but simply allocates the target bits according to the average method, and does not consider that different types of frame encoding methods are also very different. A bit rate control strategy cannot Applicable to all types of frames, the rate control accuracy of this bit rate control algorithm is not high enough, and the stability of the encoded video quality is not high enough, resulting in no reasonable bit rate allocated to areas with high image complexity

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  • Code rate control method fusing image features
  • Code rate control method fusing image features
  • Code rate control method fusing image features

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Embodiment Construction

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0056] A code rate control method for fusing image features proposed by the present invention, its overall realization block diagram is as follows figure 1As shown, it controls the code rate of the three levels of the group of pictures layer, the frame layer, and the maximum coding unit layer respectively. At the group of pictures layer, the target bit allocation of the pictures in the group of pictures is optimized according to the characteristics of the pictures; Layer, select different code rate control models for control according to the type of coding frame; at the maximum coding unit layer, similar to the frame layer, also select different target bit allocation strategies according to the frame type of the frame where the maximum coding unit is located.

[0057] Code rate control method of the present invention comprises the following st...

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Abstract

The invention discloses a code rate control method fusing image features. In frame layer intra-frame target bit allocation, image complexity of images and a target bit of each pixel point are fully considered, the images with high image complexity obtain more target bits, the coding rate is utilized more fully, and quality is more stable; in frame layer inter-frame target bit allocation, image complexity between images in an image group is fully considered, more target bits are allocated to the images with high image complexity; and in a maximum coding unit layer, according to the frame type of a frame wherein a maximum coding unit is, different code rate control strategies are used, so that image features are given more consideration to in a target bit allocation process. The code rate control method fusing image features has the advantages that a peak signal to noise ratio of a video reconstructed by coding using the method provided by the invention is improved by 0.04 to 0.67dB, and code rate control accuracy is improved to 0.00 to 8.49kb/s.

Description

technical field [0001] The invention relates to a code rate control technology, in particular to a code rate control method for fusing image features. Background technique [0002] With the rapid development of digital video and display technology, high-definition and ultra-high-definition video has gradually entered people's field of vision. As the development direction of a new generation of video technology, it will be used in home theater, video conferencing, network video and other fields. However, uncompressed high-definition and ultra-high-definition video contains a huge amount of data, and the limitation of network bandwidth has become a bottleneck restricting its wide application. Therefore, the International Telecommunication Union Video Coding Expert Group and the International Electrotechnical Commission Motion Picture Expert Group developed a A new generation of video coding standard - High Efficiency Video Coding (HEVC), compared with H.264 / AVC, this coding st...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/30H04N19/70H04N19/177H04N19/114
Inventor 彭宗举费马燕陈芬陈伟国
Owner NINGBO UNIV
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