Patent
Spectral enhancing method and device
Pierrick Philippe,Patrice Collen +1 more
TLDR
In this paper, a method for enhancing spectral content of a signal having an incomplete spectrum including a first spectral band is described, which is characterised in that the spectral content is subjected to a whitening step.Abstract:
The invention concerns a method for spectral enhancement and a device therefor. The inventive method is a method for enhancing spectral content of a signal having an incomplete spectrum including a first spectral band, the method including the following steps: at least transposing the spectral content of the first band into a second spectral band not included in the spectrum to generate a transposed spectrum signal, with spectrum limited to the second spectral band; transforming the spectrum of the transposed spectrum signal to obtain an enhancing signal; combining the incomplete spectrum signal and the enhancing signal to produce a spectrum enhanced signal. The invention is characterised in that the spectral content is subjected to a whitening step.read more
Citations
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Patent
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References
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Patent
Source coding enhancement using spectral-band replication
Liljeryd Lars Gustaf,Ekstrand Per Rune Albin,Henn Lars Fredrik,Hans Magnus Kristofer Kjorling +3 more
TL;DR: In this article, the authors proposed a new method and apparatus for the enhancement of source coding systems, which employs bandwidth reduction (101) prior to or in the encoder, followed by spectral-band replication (105) at the decoder.
PatentDOI
Speech bandwidth extension method and apparatus
TL;DR: In this paper, a speech bandwidth extension method and apparatus analyzes narrowband speech sampled at 8 kHz using LPC analysis to determine its spectral shape and inverse filtering to extract its excitation signal.
Patent
System for bandwidth extension of narrow-band speech
TL;DR: In this article, a system for extending the bandwidth of a first signal (i.e., a narrowband signal) such as a speech signal is described, where the second signal is generated using the second area coefficients.
Patent
Enhancing Perceptual Performance of SBR and Related HFR Coding Methods by Adaptive Noise-Floor Addition and Noise Substitution Limiting
TL;DR: In this article, the problem of insufficient noise contents is addressed in a reconstructed highband, by using Adaptive Noise-floor Addition, which is applicable to both speech coding and natural audio coding systems.
Patent
Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
TL;DR: In this paper, a method and an apparatus for spectral envelope encoding is presented, which is applicable to both natural audio coding and speech coding systems and is especially suited for coders using SBR [WO 98/57436] or other high frequency reconstruction methods.