METHOD FOR REDUCTION OF ALIASING INTRODUCED BY SPECTRAL ENVELOPE ADJUSTMENT IN REAL-VALUED FILTERBANKS
Patent №
US 8,346,566
Granted
2013-01-01
Filed 2010
Owner
CODING TECHNOLOGIES SWEDEN AB
Lab
—
AI components
1
speech
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
12872482
The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
AI classification
Ownership
CODING TECHNOLOGIES SWEDEN AB
assignment · 254090197
Assignors
KJOERLING, KRISTOFER, VILLEMOES, LARS
On an employer assignment, the assignors are typically the inventors.