ENHANCING PERCEPTUAL PERFORMANCE OF SBR AND RELATED HFR CODING METHODS BY ADAPTIVE NOISE-FLOOR ADDITION AND NOISE SUBSTITUTION LIMITING
Patent №
US 8,036,880
Granted
2011-10-11
Filed 2009
Owner
CODING TECHNOLOGIES SWEDEN AB
Lab
—
AI components
2
nlp · speech
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
12490969
Methods and an apparatus for enhancement of source coding systems utilizing high frequency reconstruction (HFR) are introduced. The problem of insufficient noise contents is addressed in a reconstructed highband, by using Adaptive Noise-floor Addition. New methods are also introduced for enhanced performance by means of limiting unwanted noise, interpolation and smoothing of envelope adjustment amplification factors. The methods and apparatus used are applicable to both speech coding and natural audio coding systems.
AI classification
Ownership
CODING TECHNOLOGIES SWEDEN AB
assignment · 231910365
Assignors
LILJERYD, LARS G., KJOERLING, KRISTOFER, EKSTRAND, PER, HENN, FREDRIK
On an employer assignment, the assignors are typically the inventors.