Patent · US Active

Decoders and methods thereof for managing pictures in video decoding process

US10674171B2 · kind B2 · utility

7Cited by

1References

2Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Jonatan Samuelsson · Stockholm, SE
Rickard Sjöberg · Stockholm, SE
Per Wennersten · Kramfors, SE

Key dates

Filing date	Sep 20, 2012
Grant date	Jun 2, 2020
Priority date	—
Expiry date	Nov 1, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/46
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The solution presented herein defines from which previously decoded picture to retrieve the values for calculating POC of the current picture regardless of how many temporal layers have been decoded. That is achieved by determining the POC of the current picture, to be used by the decoder, as a sum of a syntax element pic_order_cnt_lsb and most significant bits of the POC, PicOrderCntMsb, of the current picture, wherein the PicOrderCntMsb of the current picture is derived using at least a prevPicOrderCntMsb and a prevPicOrderCntLsb and the prevPicOrderCntMsb is set equal to the most significant bits of the POC of a previous reference picture in decoding order that has a layer identity equal to zero and prevPicOrderCntLsb is set equal to the value of the least significant bits of the POC of a previous reference picture in decoding order that has a layer identity equal to zero.

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