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Methods and devices for encoding and decoding a sequence of pictures, and corresponding computer program products and computer-readable medium

A sequence encoding and picture technology, applied in the field of encoding and decoding of pictures or picture sequences, can solve problems such as inaccuracy, violation of original range limit constraints, encoding drift artifacts, low encoding efficiency, etc.

Active Publication Date: 2018-06-08
INTERDIGITAL VC HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] When clipping using this method, the original range limit constraints (e.g. Rec.709) may be violated
Therefore, not respecting the original range limit affects the quality / accuracy of the reconstructed / decoded picture
[0015] In addition, since the reconstructed / decoded picture samples can be used as predictors for subsequent picture samples (intra or inter prediction), this reconstructed / decoded picture sample inaccuracy may propagate in the picture, leading to coding drift artifacts shadow or coding inefficiency

Method used

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  • Methods and devices for encoding and decoding a sequence of pictures, and corresponding computer program products and computer-readable medium
  • Methods and devices for encoding and decoding a sequence of pictures, and corresponding computer program products and computer-readable medium
  • Methods and devices for encoding and decoding a sequence of pictures, and corresponding computer program products and computer-readable medium

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Embodiment Construction

[0070] It should be appreciated that the drawings and description of the present disclosure have been simplified to illustrate elements relevant to a clear understanding of the present disclosure, while many other elements found in a typical encoding and / or decoding device have been omitted for the sake of clarity.

[0071] 5.1 General principles

[0072] A general principle of the present disclosure is to apply post-processing on the encoding side and / or decoding side towards prediction units or decoded units (ie more generally picture units) in order to improve the quality and / or precision of the picture units.

[0073] Such post-processing can be applied to the color component of the picture unit, but consider another color component of the picture unit, also called "dual component".

[0074] Such postprocessing can be for example:

[0075] - clipping of the value of a color component of a picture unit, taking into account the value of another color component, so as to res...

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Abstract

The invention provides methods and devices for encoding and decoding a sequence of pictures, and corresponding computer program product and computer-readable medium. The disclosure relates to a methodfor decoding a video stream representative of a sequence of pictures, comprising: - obtaining (22) at least a first color component and a second color component of a picture unit, - decoding (23) atleast one parameter of a post-processing of the second component, said at least one parameter being defined as a function of the first color component, - applying (24) said at least one post-processing to the second color component of the picture unit responsive to said at least one decoded parameter and to said first color component.

Description

1. Technical field [0001] This disclosure relates to the encoding and decoding of pictures or sequences of pictures (also known as video). [0002] More specifically, the present disclosure provides a technique for post-processing picture units, such as prediction units or decoded units, on the encoding side or on the decoding side, with the aim of improving their quality and / or precision and improving encoding efficiency. [0003] Such techniques according to this disclosure may be implemented in video encoders and / or video decoders conforming to any video codec standardization, including, for example, HEVC, SHVC, HEVC-Rext and other HEVC extensions. 2. Background technology [0004] This section is intended to introduce the reader to various aspects of art, which may be related to various aspects of the present disclosure, which are described and / or claimed below. This discussion is considered helpful in providing the reader with background information to better understa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/186H04N19/86H04N19/117H04N19/463H04N19/136
CPCH04N19/117H04N19/463H04N19/136H04N19/86H04N19/186H04N19/50H04N19/82H04N19/85
Inventor P.博兹P.安德里冯P.萨尔蒙
Owner INTERDIGITAL VC HLDG INC
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