Method and system for selectively breaking prediction in video coding

• US 10,104,377 B2
• Filed: 06/24/2016
• Issued: 10/16/2018
• Est. Priority Date: 12/28/2010
• Status: Active Grant

• Current Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Original Assignee: Dolby Laboratories Licensing Corporation (Dolby Laboratories Incorporated)
• Inventors: Horowitz, Michael
• Primary Examiner(s): Vo, Tung T
• Assistant Examiner(s): Becker, Joseph W
• Application Number:
  US15/192,079
• Publication Number:
  US 20160309155A1
• Time in Patent Office: 844 Days
• Field of Search: 375240
• CPC Class Codes: C12N 9/0071 acting on paired donors with incorporation of molecular oxygen (1.14)
• CPC Class Codes: C12P 17/14 Nitrogen or oxygen as hetero atom and at least one other diverse hetero ring atom in the same ring
• CPC Class Codes: C12P 7/14 Multiple stages of fermentation; Multiple types of microorganisms or re-use of microorganisms
• CPC Class Codes: C12Y 114/00 Oxidoreductases acting on paired donors, with incorporation or reduction of molecular oxygen (1.14)
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/105 Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• CPC Class Codes: H04N 19/137 Motion inside a coding unit, e.g. average field, frame or block difference
• CPC Class Codes: H04N 19/139 Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/174 the region being a slice, e.g. a line of blocks or a group of blocks
• CPC Class Codes: H04N 19/196 being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters processing of motion vectors H04N19/513
• CPC Class Codes: H04N 19/436 using parallelised computational arrangements
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/50 using predictive coding H04N19/61 takes precedence
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/80 Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation H04N19/635, H04N19/86 take precedence
• CPC Class Codes: H04N 19/82 : involving filtering within a prediction loop
• CPC Class Codes: H04N 19/91 : Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Abstract

Described are techniques in video coding and/or decoding that allow for selectively breaking prediction and/or in loop filtering across segment boundaries between different segments of a video picture. A high layer syntax element, such as a parameter set or a slice header, may contain one or more indications signalling to an encoder and/or decoder whether an associated prediction or loop filtering tool may be applied across the segment boundary. In response to such one or more indications, the encoder and/or decoder may then control the prediction or loop filtering tool accordingly.

Claims

1. A method for decoding by a decoder a coded video picture, the method comprising:

obtaining a first slice and a second slice of the coded video picture,

wherein the first slice and the second slice are divided by at least one slice boundary between the first slice and the second slice,

wherein at least the first slice is divided by a tile boundary to belong to two tiles,

wherein the slice boundary is different from the tile boundary, and

wherein the two tiles do not have associated tile headers;

receiving an NAL unit and determining a type of the NAL unit;

if the NAL unit is a parameter set NAL unit, obtaining a parameter set including a first flag for controlling a sample adaptive offset filter operation across the tile boundary;

determining whether to apply the sample adaptive offset filter operation across the tile boundary according to the first flag;

obtaining, from the coded video picture, a slice header including a second flag for controlling a sample adaptive offset filter operation across the at least one slice boundary, wherein the first flag is different from the second flag; and

determining whether to apply the sample adaptive offset filter operation across the at least one slice boundary according to the second flag.

2. A non-transitory computer-readable medium having instructions stored thereon which, when executed by one or more processors, cause the one or more processors to perform operations comprising:

obtaining a first slice and a second slice of the coded video picture,

wherein the first slice and the second slice are divided by at least one slice boundary between the first slice and the second slice,

wherein at least the first slice is divided by a tile boundary to belong to two tiles,

wherein the slice boundary is different from the tile boundary, and

wherein the two tiles do not have associated tile headers;

receiving an NAL unit and determining a type of the NAL unit;

if the NAL unit is a parameter set NAL unit, obtaining a parameter set including a first flag for controlling a sample adaptive offset filter operation across the tile boundary;

determining whether to apply the sample adaptive offset filter operation across the tile boundary according to the first flag;

obtaining, from the coded video picture, a slice header including a second flag for controlling a sample adaptive offset filter operation across the at least one slice boundary, wherein the first flag is different from the second flag; and

determining whether to apply the sample adaptive offset filter operation across the at least one slice boundary according to the second flag.