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Selective deblock filtering techniques for video coding

A technology of deblocking filtering and video coding, which is applied in the field of filtering technology and can solve problems such as aggravating blocking effects and defects.

Inactive Publication Date: 2012-03-21
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this happens, decoded video frames can appear "blocky", which is very undesirable
Transformation and quantization of video blocks can exacerbate this undesirable blocking artifact in encoded video frames

Method used

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  • Selective deblock filtering techniques for video coding
  • Selective deblock filtering techniques for video coding
  • Selective deblock filtering techniques for video coding

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Embodiment Construction

[0025] This disclosure describes selective deblocking filtering techniques that are particularly useful for coding standards that do not specify in-loop deblocking filtering for standards compliance, such as MPEG-4 and ITU H.263 P0. In accordance with the present invention, deblocking filtering may be performed selectively with respect to the block boundaries of a given video block being encoded, the motion compensation process may be performed using a filtered version of the predicted video frame used to encode the given video block , or do both. The present invention also provides selection rules that can be applied to determine what type of deblocking technique to apply in various situations. The selection rules can improve video coding, and can also ensure that no mismatch between video blocks at the encoder and decoder is introduced by filtering.

[0026] The described techniques may address both innate and inherited blockiness that may arise due to prediction-based vide...

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Abstract

This disclosure describes selective deblock filtering techniques that are particularly useful with coding standards that do not specify in-loop deblock filtering for standard compliance. In accordance with this disclosure, deblock filtering may be selectively performed with respect to block boundaries of a given video block being coded, a motion compensation process can be performed using a filtered version of the prediction video frame used to code the given video block, or both. This disclosure also provides selection rules that can be applied to determine what type of deblocking techniquesto apply in various scenarios. The selection rules may improve the video coding and may also ensure that mismatch between video blocks at an encoder and a decoder is not introduced by the deblock filtering.

Description

[0001] Related applications [0002] This application claims the 60th application titled "SELECTIVE MC-DB: A DEBLOCKING POST-FILTER BASED ONMOTION COMPENSATION" filed on October 18, 2005. / 728,361, which is assigned to the assignee of the present application and is hereby incorporated by reference in its entirety for all purposes. technical field [0003] The present invention relates to digital video processing, and more particularly, to filtering techniques that reduce blocking artifacts in encoded video frames. Background technique [0004] Digital video capabilities can be incorporated into a wide variety of devices including digital televisions, digital live broadcast systems, wireless communication devices, personal digital assistants (PDAs), laptop computers, desktop computers, digital cameras, digital recording devices, Cellular or satellite radiotelephones, direct two-way communication devices (sometimes called "walkie-talkies"), etc. Digital video devices can of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/30
CPCH04N19/00781H04N19/00278H04N19/00157H04N19/00066H04N19/176H04N19/61H04N19/117H04N19/14H04N19/85H04N19/86
Inventor 滕佳缘沙拉特·曼朱纳特叶琰
Owner QUALCOMM INC