Patent
Controlling a weighting filter based on the spectral content of a speech signal
Yang Gao,Huan-Yu Su +1 more
TLDR
In this article, the spectral content of an input speech signal is determined based on a defined spectral characteristic (e.g., a defined characteristic slope), and a frequency specific filter component of a weighting filter is controlled based on the determination of the spectral contents of speech signal or/and its location in the encoder.Abstract:
A method for preparing a speech signal for encoding comprises determining whether the spectral content of an input speech signal is representative of a defined spectral characteristic (e.g., a defined characteristic slope). A frequency specific filter component of a weighting filter is controlled based on the determination of the spectral content of speech signal or/and its location in the encoder. A core weighting filter component of the weighting filter may be maintained regardless of the spectral content of the speech signal.read more
Citations
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Patent
Systems, methods, devices, apparatus, and computer program products for audio equalization
Hyun Jin Park,Erik Visser,Jong Won Shin,Kwokleung Chan,Samir Kumar Gupta,Andre Gustavo P. Schevciw,Ren Li,Jeremy Toman +7 more
TL;DR: In this paper, the authors described methods and apparatus for generating an anti-noise signal and equalizing a reproduced audio signal (e.g., a far-end telephone signal) using information from an acoustic error signal.
Patent
Systems, methods, apparatus, and computer-readable media for automatic control of active noise cancellation
TL;DR: In this article, active noise cancellation is combined with spectrum modification of a reproduced audio signal to enhance intelligibility, and the results show that the modified audio signal is more intelligible than the original signal.
Patent
Systems, methods, apparatus, and computer program products for spectral contrast enhancement
TL;DR: In this article, the spectral contrast enhancement of speech signals, based on information from a noise reference that is derived by a spatially selective processing filter from a multichannel sensed audio signal, is described.
Patent
Systems, methods, apparatus and computer program products for enhanced intelligibility
Erik Visser,Jeremy Toman +1 more
TL;DR: In this article, the use of equalization techniques to improve intelligibility of a reproduced audio signal (e.g., a far-end speech signal) is described, which is similar to our approach.
Patent
Encoder, decoder and methods for encoding and decoding data segments representing a time-domain data stream
Geiger Ralf,Max Neuendorf,Yokotani Yoshikazu,Nikolaus Rettelbach,Herre Juergen,Geyersberger Stefan +5 more
TL;DR: An apparatus for decoding data segments representing a time-domain data stream, a data segment being encoded in the time domain or in the frequency domain, having successive blocks of data representing successive and overlapping blocks of time domain data samples was proposed in this article.
References
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PatentDOI
CS-ACELP speech compression system with adaptive pitch prediction filter gain based on a measure of periodicity
TL;DR: In this paper, a speech coding system employing an adaptive codebook model of periodicity is augmented with a pitch-predictive filter (PPF), which has a delay equal to the integer component of the pitch-period and a gain which is adaptive based on a measure of the periodicity of the speech signal.
Patent
A speech communication system and method for handling lost frames
TL;DR: In this article, a speech communication system and method that has an improved way of handling information lost during transmission from the encoder to the decoder is presented, which matches the energy of the synthesized speech to the energy in the previously received frame.
Proceedings ArticleDOI
Compensated mel frequency cepstrum coefficients
TL;DR: It is shown that this approach can increase the recognition rate, and the technique, known as pre-emphasis, is not used in some speech recognition systems because it can increasing the noise energy at high frequencies, which degrades the system's performance.
Patent
Perceptual weighting device and method for efficient coding of wideband signals
TL;DR: In this article, a perceptual weighting device for producing a perceptually weighted signal in response to a wideband signal comprises a signal preemphasis filter, a synthesis filter claculator, and a perceptual weighted filter.
Patent
Adapting noise masking level in analysis-by-synthesis employing perceptual weighting
TL;DR: In this paper, the spectral parameters serving in this adaptation may in particular comprise parameters representative of the overall slope of the spectrum of the speech signal, and parameters representing the resonant character of the short-term synthesis filter.