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1. WO2020089701 - EFFICIENT QUANTIZATION PARAMETER PREDICTION METHOD FOR LOW LATENCY VIDEO CODING

Publication Number WO/2020/089701
Publication Date 07.05.2020
International Application No. PCT/IB2019/055357
International Filing Date 25.06.2019
IPC
H04N 19/14 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
136Incoming video signal characteristics or properties
14Coding unit complexity, e.g. amount of activity or edge presence estimation
H04N 19/124 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
124Quantisation
H04N 19/127 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
127Prioritisation of hardware or computational resources
H04N 19/154 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
154Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
H04N 19/159 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
CPC
H04N 19/124
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
124Quantisation
H04N 19/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
136Incoming video signal characteristics or properties
14Coding unit complexity, e.g. amount of activity or edge presence estimation
H04N 19/146
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
146Data rate or code amount at the encoder output
H04N 19/159
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
157Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
159Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
H04N 19/172
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
17the unit being an image region, e.g. an object
172the region being a picture, frame or field
H04N 19/176
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
Applicants
  • ATI TECHNOLOGIES ULC [CA]/[CA]
Inventors
  • LEW, Dennis
  • WANG, Jiao
  • ZHANG, Lei
  • HAROLD, Edward A.
Agents
  • SMITH, Ryan T.
  • PERRY, Stephen J
  • CURRIER, Andrew T.
  • SPENCE, Kristjan
  • JOHNSON, David J.
  • MAR, Richard
  • ROLFE, Damian
  • LEE, Christina
  • FEENEY, Alan
Priority Data
16/177,15631.10.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) EFFICIENT QUANTIZATION PARAMETER PREDICTION METHOD FOR LOW LATENCY VIDEO CODING
(FR) PROCÉDÉ DE PRÉDICTION EFFICACE DE PARAMÈTRE DE QUANTIFICATION POUR CODAGE VIDÉO À FAIBLE LATENCE
Abstract
(EN)
Systems, apparatuses, and methods for calculating a quantization parameter (QP) for encoding video frames to meet a given bit budget are disclosed. Control logic coupled to an encoder calculates a complexity indicator that represents a level of difficulty in encoding a previous video frame. The complexity indicator is based at least in part on a first parameter associated with the previous video frame and corresponds to one or more of a variance, an intra-prediction factor, and an inter-to-intra ratio. The complexity indicator is then used by the control logic to calculate a preferred QP to use to encode the current video frame to meet a given bit budget. By using the preferred QP generated based on the complexity indicator, the encoder is able to make fewer QP adjustments during the frame. This helps to improve the visual quality of the resulting encoded video bitstream.
(FR)
L'invention concerne des systèmes, des appareils et des procédés pour calculer un paramètre de quantification (QP) pour coder des trames vidéo pour satisfaire une capacité binaire allouée donnée. Une logique de commande couplée à un codeur calcule un indicateur de complexité qui représente un niveau de difficulté dans le codage d'une trame vidéo précédente. L'indicateur de complexité est basé, au moins en partie, sur un premier paramètre associé à la trame vidéo précédente et correspond à une variance, à un facteur de prédiction intra et/ou à un rapport inter-intra. L'indicateur de complexité est ensuite utilisé par la logique de commande pour calculer un QP préféré à utiliser pour coder la trame vidéo actuelle pour satisfaire une capacité binaire allouée donnée. En utilisant le QP préféré généré sur la base de l'indicateur de complexité, le codeur peut réaliser moins de réglages de QP pendant la trame. Cela aide à améliorer la qualité visuelle du train de bits vidéo codé résultant.
Also published as
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