Patent · US Active

Methods and apparatus for improving high frequency reconstruction of audio and speech signals

US8112284B2 · kind B2 · utility

42Cited by

25References

30Claims

0Family size

Assignee

Coding Technologies AB · SE

Inventors

Kristofer Kjorling · Solna, SE
Per Ekstrand · Stockholm, SE
Holger Horich · Koblenzer Straße, DE

Key dates

Filing date	Nov 19, 2008
Grant date	Feb 7, 2012
Priority date	—
Expiry date	Jul 19, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG10L21/038
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilizing high frequency reconstruction (HFR). It utilizes a detection mechanism on the encoder side to assess what parts of the spectrum will not be correctly reproduced by the HFR method in the decoder. Information on this is efficiently coded and sent to the decoder, where it is combined with the output of the HFR unit.

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