Patent · US Active

Decoding a block of video samples

US11070818B2 · kind B2 · utility

0Cited by

3References

20Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Rickard Sjöberg · Stockholm, SE
Kenneth Andersson · Gävle, SE
Jacob Ström · Stockholm, SE
Per Wennersten · Kramfors, SE
Zhi Zhang · Munich, DE

Key dates

Filing date	Jun 4, 2018
Grant date	Jul 20, 2021
Priority date	—
Expiry date	Oct 17, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/70
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method of decoding a block of video samples from a video bitstream is provided in which the method includes decoding a DQPRP value, deriving a PQP value for a block having a non-zero residual, decoding a DDQP value for the block, deriving a SDQP value for the block from the DDQP value and the DQPRP value, deriving a block QP value for the block from the SDQP value and the PQP value, decoding at least one non-zero coefficient of the block, deriving values of a residual block for the block by first scaling the at least one non-zero coefficient using the QP value and thereafter applying an inverse transform, deriving values of a prediction block spatial or temporal prediction, and deriving decoded sample values for the block by adding the values of the residual block and the values of the prediction block.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.