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Hardware implementation method and device for sample adaptive offset compensation filtering

A sample adaptive and offset compensation technology, applied in the field of video processing, can solve problems such as high delay, poor real-time performance, and low efficiency of adaptive offset compensation

Active Publication Date: 2021-05-18
北京博雅慧视技术有限公司
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Problems solved by technology

[0003] At present, a method for implementing sample adaptive offset compensation filtering is provided in the related art. The method is based on software program for sample adaptive offset compensation. When compensating based on software program, each pixel in the image needs to be sequentially Point compensation, this pixel-by-pixel compensation method leads to low efficiency of adaptive offset compensation, high delay, and poor real-time performance

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  • Hardware implementation method and device for sample adaptive offset compensation filtering
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Embodiment Construction

[0058] Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for thorough understanding of the application and to fully convey the scope of the application to those skilled in the art.

[0059] It should be noted that, unless otherwise specified, technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which this application belongs.

[0060] A hardware implementation method and device for sample adaptive offset compensation filtering according to an embodiment of the present application will be described below with reference to the accompanying drawings. ...

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Abstract

The invention provides a hardware implementation method and device for sample adaptive offset compensation filtering. The method comprises the following steps: respectively dividing a source image and a corresponding reconstructed image into a plurality of image blocks according to a preset size; the compensation value of the first image block under each color channel is calculated in parallel through the compensation filter circuit corresponding to each color channel, and the first image block is any one image block included in the source image; and compensating a reconstructed image block corresponding to the first image block in the reconstructed image according to the compensation value of the first image block under each color channel. Sample adaptive offset filtering is realized through a hardware circuit, then the optimal rate distortion value and the optimal compensation value in each mode are calculated in parallel through the circuit, and the optimal compensation value corresponding to the minimum optimal rate distortion value is selected from the optimal rate distortion values in each mode to compensate the reconstructed image, so that the compensation accuracy is higher, the calculation speed is high, the delay is low, and the real-time requirement of a hardware encoder is met while the ringing effect of the encoder is solved.

Description

technical field [0001] The present application belongs to the technical field of video processing, and in particular relates to a hardware implementation method and device for sample adaptive offset compensation filtering. Background technique [0002] Sample Adaptive Offset Compensation Filtering (Sample Adaptive Offset, SAO) is to perform pixel compensation on the image to reduce the distortion between the source image and the reconstructed image. [0003] At present, a method for implementing sample adaptive offset compensation filtering is provided in the related art. The method is based on software program for sample adaptive offset compensation. When compensating based on software program, each pixel in the image needs to be sequentially This pixel-by-pixel compensation method leads to low efficiency of adaptive offset compensation, high delay, and poor real-time performance. Contents of the invention [0004] This application proposes a hardware implementation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/117H04N19/147H04N19/176H04N19/186H04N19/583
CPCH04N19/147H04N19/186H04N19/176H04N19/117H04N19/583
Inventor 王世超文湘鄂宋磊张广耀东健慧向国庆
Owner 北京博雅慧视技术有限公司
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