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Method and apparatus of advanced de-blocking filter in video coding

A technology of deblocking filtering and video decoder, applied in digital video signal modification, electrical components, image communication, etc., can solve the problems of suboptimal subjective and objective performance of deblocking filtering method

Active Publication Date: 2018-05-11
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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Problems solved by technology

[0046] Current deblocking filtering methods cannot always achieve the best subjective and objective performance for various sequences

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  • Method and apparatus of advanced de-blocking filter in video coding
  • Method and apparatus of advanced de-blocking filter in video coding
  • Method and apparatus of advanced de-blocking filter in video coding

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Embodiment Construction

[0065] The following description is the best way to implement the present invention, and the description is to illustrate the basic principle of the present invention, so it should not be interpreted as limiting. The scope of the invention is best determined by reference to the appended claims.

[0066] In the following description, the Y component is the same as the luma component, the U component is the same as the Cb component, and the V component is the same as the Cr component, and one chrominance component may be the U component or the V component.

[0067] In order to further improve the performance of deblocking filtering, the present invention discloses an advanced method. In conventional deblocking filtering processes, the parameters for all sequences are usually fixed regardless of the local characteristics of the underlying image data. According to the invention, parameters are locally adapted to the underlying image data. For example, a deblocking filter for eac...

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Abstract

A method and apparatus for adaptive de-blocking filter are disclosed. One or more parameters associated with a de-blocking filter are determined. De-blocking filter using the derived parameters are then applied to reconstructed blocks. Each set of parameters is used for each picture, slice, coding tree unit (CTU) or CU (coding unit). The parameters can be signalled in VPS (video parameter set), SPS (sequence parameter set), PPS (picture parameter set), slice header, CTU (coding tree unit) or CU (coding unit) of the video bitstream. The parameters correspond to one or more values used as thresholds, clipping boundaries, or both the thresholds and clipping boundaries for the de-blocking filter. In one embodiment, the parameters for the current picture are determined using a training processusing a current coded picture a previous coded picture as training data.

Description

[0001] Related references [0002] The present invention claims the priority of PCT patent application No. PCT / CN2015 / 089523 submitted on September 14, 2015, which is incorporated by reference in its entirety. technical field [0003] The present invention relates to encoding and decoding of video and image data, and in particular, the present invention relates to techniques for improving video quality by using de-blocking (deblocking) filtering on reconstructed video or images. Background technique [0004] Video data requires a large amount of storage space to store the video data or a wide bandwidth to transmit the video data. With the development of high resolution and higher frame rate, if the video data is stored or transmitted in an uncompressed format, the demand for storage or transmission bandwidth will be very scary. Therefore, video data is usually stored or transmitted in a compressed format using video codec technology. Using new video compression formats such...

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Application Information

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IPC IPC(8): H04N19/00
CPCH04N19/117H04N19/14H04N19/154H04N19/50H04N19/70H04N19/82H04N19/86H04N19/136H04N19/176
Inventor 张凯安基程黄晗
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE
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