Signal parameter value information in a parameter set to reduce the amount of data contained in an encoded video bitstream

A picture parameter set and parameter value technology, applied in the field of video encoding and decoding, can solve problems such as excessive delay, save bits and improve overall compression efficiency.

Active Publication Date: 2022-02-08
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] GRA pictures are essentially used for random access in a bitstream coded for low-latency coding, where a full IRAP picture would cause too much delay

Method used

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  • Signal parameter value information in a parameter set to reduce the amount of data contained in an encoded video bitstream
  • Signal parameter value information in a parameter set to reduce the amount of data contained in an encoded video bitstream
  • Signal parameter value information in a parameter set to reduce the amount of data contained in an encoded video bitstream

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Embodiment Construction

[0060] Embodiments described herein may be used in a video encoder or video decoder.

[0061] figure 1 is a schematic block diagram of video encoder 140 according to one embodiment. The current pixel block is predicted by performing motion estimation from an already provided pixel block in the same frame or a previous frame using the motion estimator 150 . In the case of inter prediction, the result of motion estimation is a motion or displacement vector associated with the reference block. The motion compensator 150 may use the motion vectors to output the inter prediction of the pixel block. The intra predictor 149 calculates intra prediction of the current pixel block. The outputs from the motion estimator / compensator 150 and the intra predictor 149 are input into a selector 151 which selects intra prediction or inter prediction for the current pixel block. The output from the selector 151 is input to an error calculator in the form of an adder 141 which also receives ...

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Abstract

A method (400) performed by a decoder (260, 600, 701) for decoding a bitstream comprising a picture parameter set PPS and a first slice set. The method includes obtaining (s402) the picture parameter set. The method also includes decoding (s404) syntax elements included in the set of picture parameters to obtain an indicator value. The decoder is configured such that: if the indicator value is set to a first value, the decoder determines that a picture header included in the bitstream includes a parameter value corresponding to a specific parameter, otherwise the decoding The filter determines that each slice included in the first set of slices includes a parameter value corresponding to a particular parameter. If the picture header includes a parameter value corresponding to a specific parameter, the slice data of each slice included in the first slice set is decoded using the parameter value.

Description

technical field [0001] This disclosure relates to video encoding and decoding. Background technique [0002] 1.1 HEVC and VVC [0003] High Efficiency Video Coding (HEVC) is a block-based video codec standardized by ITU-T and MPEG. The HEVC video codec utilizes both temporal and spatial prediction. Spatial prediction is achieved using intra (I) prediction within the current picture. Temporal prediction is achieved at the block level using unidirectional (P) or bidirectional (B) inter prediction from previously decoded reference pictures. In the encoder, the difference between the original and predicted pixel data (called the residual) is transformed to the frequency domain before being sent along with the necessary prediction parameters such as prediction mode and motion vectors, which are also entropy coded and is quantized, then entropy encoded. The decoder performs entropy decoding, inverse quantization and inverse transformation to obtain a residual, which is then a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/70H04N19/174H04N19/46
CPCH04N19/174H04N19/172H04N19/70H04N19/179H04N19/513H04N19/593H04N19/124H04N19/13H04N19/60H04N19/46H04N19/188
Inventor 理卡尔德·肖伯格米特拉·达姆汉尼安玻尔·温纳斯滕马丁·彼得松
Owner TELEFON AB LM ERICSSON (PUBL)
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