Adaptive residual error frame operation method bused on video image complexity
An operation method and residual frame technology, which are applied in image communication, digital video signal modification, television, etc., can solve the problems of not obtaining the effect of removing redundancy between frames, loss of compression quality, and reduction of compression effect, so as to avoid compression. Effects, quality optimization, avoiding greatly reduced effects
Inactive Publication Date: 2008-04-23
FUDAN UNIV
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Therefore, the residual frame operation in the fixed mode does not adjust its operation mode according to the content changes of the video stream, resulting in the residual frame operation not obtaining the optimal effect of removing inter-frame redundancy, and even often causing serious compression effects. decline
[0005] The present invention proposes a brand-new adaptive residual frame operation method based on video image complexity, which can dynamically change the insertion interval of the original frame (group) according to the content of the video stream, fundamentally solving the problem of preventing error accumulation and trying to Remove the contradiction between the inter-frame redundancy of the video image, and avoid the great loss of compression quality caused by the scene transfer or background mutation in the video stream
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[0048] The implementation of the present invention will be further introduced below through specific simulation.
[0049] Suppose the video frame to be encoded is figure 2 . The reference frame is divided into two cases: one is an image similar to the content of the frame to be encoded, such as image 3 , which corresponds to a relatively stable video stream; the other is an image that is very different from the content of the frame to be encoded, such as Figure 4 , which corresponds to situations where a background mutation or scene transition occurs.
[0050] Figure 5 and Image 6 Residual frame images in these two cases are shown separately. Depend on Figure 5 It can be seen that when the video stream is relatively stable, the residual frame between the frame to be encoded and the reference frame is relatively simple, a large number of complex static backgrounds are offset, and the image complexity is low. In this example, Figure 5 The image complexity of is 21...
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This invention relates to a self-adaptable remaining different frame operation method used to compress video image based on the complexity of video images. This invention forecasts whether the remaining different frame operation will bring better compressing effect by defining the complexity of video images, and does the self-adaptable remaining different operation according to the forecasting result. The self-adapted remaining different frame operation method brought forward by this invention makes the mode of the remaining difference operation change with the content of the video images, to ensure using the redundancy among frames furthest to video image flow of any content, and also avoid the blight bought by the scene diversion or the background break to the remaining different frame operation at the same time. The method of this invention can be applied not only in the self-adaptable remaining different frame operation of the single-frame video images, but also in the self-adaptable remaining different operation of video image frame groups composed of a certain quantity of video image frames.
Description
technical field [0001] The invention belongs to the technical field of video image compression, and in particular relates to an adaptive residual frame operation method based on video image complexity. Background technique [0002] In the process of video image compression and encoding, since there is a great correlation between the previous and subsequent image frames, the image redundancy in the time direction can usually be removed through the residual frame operation, the image to be encoded can be simplified, and the compression efficiency and quality can be improved. Today's most cutting-edge video image compression algorithms include residual frame operations. Whether it is motion estimation and motion compensation [1] in the MPEG standard, or the original frame group and residual frame group interleaving method [2] in 3D-DWT-SPIHT, the residual frame operation is used to achieve better compression effect. [0003] In the above methods, the mode of residual frame op...
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IPC IPC(8): H04N7/26H04N19/105H04N19/137H04N19/14H04N19/587H04N19/87
Inventor 潘吉彦胡波
Owner FUDAN UNIV