Data processing: speech signal processing – linguistics – language – Speech signal processing – Psychoacoustic
Reexamination Certificate
2009-06-24
2011-10-11
Armstrong, Angela A (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
Psychoacoustic
C704S501000, C704SE21011
Reexamination Certificate
active
08036880
ABSTRACT:
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.
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Ekstrand Per
Henn Fredrik
Kjoerling Kristofer
Liljeryd Lars G.
Armstrong Angela A
Coding Technologies Sweden AB
Glenn Michael A.
Glenn Patent Group
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