Patent · US Active

Simplified downsampling for matrix based intra prediction

US11973952B2 · kind B2 · utility

0Cited by

2References

22Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

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

Key dates

Filing date	Jun 12, 2020
Grant date	Apr 30, 2024
Priority date	—
Expiry date	Apr 26, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/593
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A prediction unit (60) for an encoder (24) or decoder (44) implements matrix based intra prediction Input boundary samples for a current block are downsampled to obtain reduced boundary samples for matrix multiplication and/or linear interpolation, or both. In one embodiment, downsampling is performed in a manner that aligns the reduced boundary samples with an output of a matrix multiplication unit of the prediction unit. In other embodiments, downsampling is performed without averaging. The embodiments reduce the complexity of the prediction unit and the latency of the encoder (24) or decoder (44).

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