Patent · US Active

Enhanced chroma extraction from an audio codec

US9697840B2 · kind B2 · utility

11Cited by

4References

19Claims

0Family size

Assignee

Dolby International AB · IE

Inventors

Arijit Biswas · Holden, US
Marco Fink · Hamburg, DE
Michael Schug · Erlangen, DE

Key dates

Filing date	Nov 28, 2012
Grant date	Jul 4, 2017
Priority date	—
Expiry date	Apr 18, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG10L21/0388
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The present document relates to methods and systems for music information retrieval (MIR). In particular, the present document relates to methods and systems for extracting a chroma vector from an audio signal. A method (900) for determining a chroma vector (100) for a block of samples of an audio signal (301) is described. The method (900) comprises receiving (901) a corresponding block of frequency coefficients derived from the block of samples of the audio signal (301) from a core encoder (412) of a spectral band replication based audio encoder (410) adapted to generate an encoded bitstream (305) of the audio signal (301) from the block of frequency coefficients; and determining (904) the chroma vector (100) for the block of samples of the audio signal (301) based on the received block of frequency coefficients.

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