Patent
Method and apparatus for adjusting a spectrum shape of a speech signal
TLDR
In this paper, a first filter with pole-zero transfer function A(z)/B(z) for subjecting a speech signal to a spectrum envelop emphasis and a second filter cascade-connected with the first filter, independently deriving two filter coefficients used in the second filter for compensating for the spectral tilt from the pole zero transfer function.Abstract:
Adjusting the shape of a spectrum of a speech signal includes the steps of using a first filter with pole-zero transfer function A(z)/B(z) for subjecting a speech signal to a spectrum envelop emphasis and a second filter cascade-connected with the first filter, for compensating for a spectral tilt due to the first filter, independently deriving two filter coefficients used in the second filter for compensating for the spectral tilt from the pole-zero transfer function, and compensating for the spectral tilt corresponding to the pole-zero transfer function according to the derived filter coefficients.read more
Citations
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Patent
Method and device for efficient frame erasure concealment in linear predictive based speech codecs
Jelinek Milan,Philippe Gournay +1 more
TL;DR: In this article, a method and device for improving concealment of frame erasure caused by frames of an encoded sound signal erased during transmission from an encoder (106) to a decoder (110), and for accelerating recovery of the decoder after non erased frames of the encoded sound signals have been received.
Patent
Periodic signal enhancement system
TL;DR: In this paper, the authors proposed a signal enhancement system that includes delay logic, a partitioned adaptive filter, and signal reinforcement logic to improve the understandability of speech or other audio signals.
Patent
Audio codec post-filter
TL;DR: In this article, techniques and tools for processing reconstructed audio signals are described, where a reconstructed audio signal is filtered in the time domain using filter coefficients that are calculated, at least in part, in the frequency domain.
Patent
Adaptive tilt compensation for synthesized speech residual
Gao Yang,Su San Clemente Huan-Yu +1 more
PatentDOI
Method and device for frequency-selective pitch enhancement of synthesized speech
TL;DR: In this paper, the decoded sound signal is divided into a plurality of frequency sub-band signals, and post-processing is applied to at least one of the frequency subband signals.
References
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Journal ArticleDOI
Adaptive postfiltering for quality enhancement of coded speech
Juin-Hwey Chen,Allen Gersho +1 more
TL;DR: This paper presents a complete description of the original postfiltering algorithm and the underlying ideas that motivated its development, and achieves noticeable noise reduction while introducing only minimal distortion in speech.
Proceedings ArticleDOI
Improved speech quality and efficient vector quantization in SELP
TL;DR: In this paper, a stochastically excited linear prediction (SELP) algorithm consisting of a two-stage vector quantization using an adaptive codebook and a deterministic stochastic codebook is described.
Patent
Low-delay code-excited linear-predictive coding of wideband speech at 32kbits/sec
Erik Ordentlich,Yair Shoham +1 more
TL;DR: In this article, a CELP code/decoder based system is improved for use with a wide-band signal such as a high-quality speech signal by modifying the noise weighting filter used in such systems to include a filter section which affects primarily the spectral tilt of the weighting filters in addition to a filter component reflecting formant frequency information in the input signal.