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Method for filtering video loop

A loop filter and video technology, applied in the field of video codec, can solve the problem that the decoder is difficult to meet the real-time requirements, and achieve the effect of reducing time consumption and saving system resources

Active Publication Date: 2008-06-25
HISENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In occasions that require high real-time performance, especially in embedded systems with limited resources, it is sometimes difficult for the decoder to meet the real-time requirements

Method used

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  • Method for filtering video loop

Examples

Experimental program
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Embodiment Construction

[0042] First, the loop filtering method in the prior art is described.

[0043] Referring to FIG. 1 , a schematic diagram of an embodiment of boundary distribution of a macroblock is illustrated. As shown in the figure, the macroblock includes four 8×8 blocks, respectively ①, ②, ③, and ④; the macroblock includes two vertical boundaries 1 and 2 (the solid line part in the figure), and two horizontal boundaries 3 and 4 (dotted line part in the figure); wherein, 2 represents an entire vertical boundary, and 5 represents a part of 2 (half of 2 in this embodiment). The rightmost dotted boundary in the figure is the left boundary of the macroblock (not shown) on the right side of the macroblock shown in Figure 1, and the lowermost dotted line in the figure is the macroblock below the macroblock shown in Figure 1 (not shown in the figure). ), therefore, the two dotted boundaries are the boundaries of other macroblocks, which can be compared to the macroblock shown in FIG. 1 , and wi...

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PUM

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Abstract

The invention discloses a loop filtering method, which makes a choice for a standard filtering algorithm and a reduced filtering algorithm through setting a judge step, the standard filtering algorithm is adopted when enough time is left, and the reduced filtering algorithm is adopted when no enough time is left, wherein, the reduced filtering algorithm filters wave or does not filter the wave through judging the condition of a certain sample of the plate boundary instead of judging other samples of the plate boundary, thereby avoiding the judgment on all samples of the plate boundary, saving the system resource greatly, reducing the time consumption of the loop filtering and further meeting the real-time demand.

Description

technical field [0001] The invention relates to the field of video coding and decoding, in particular to a video loop filtering method. Background technique [0002] AVS (Audio Video coding Standard, digital audio and video codec standard), like other internationally popular source compression standards, adopts a hybrid coding framework combining block-based predictive coding and transform coding. Due to the use of block-based motion compensation technology and block-based prediction residual DCT (Discrete Cosine Transform, discrete cosine transform) / IDCT (inverse Discrete Cosine Transformation, inverse discrete cosine transform) transformation, the decoder output image will inevitably appear square Effect, in order to improve the image quality of the output image at the decoding end, it is necessary to add a deblocking filter at the decoding end. [0003] Post-filtering is used in the previous source compression standards, and the decoding end filter does not need to for...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/82
Inventor 刘微杨怀省泮利
Owner HISENSE