Results 161 to 170 of about 43,657 (212)

Improvement of the narrowband LPC synthesis

ICASSP '84. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
The major weakness of the current narrowband LPC synthesizer lies in the use of a "canned" invariant excitation signal. The use of such an excitation signal is based on three primary assumptions, namely, (1) that the amplitude spectrum of the excitation signal is flat and time-invariant, (2) that the phase spectrum of the voiced excitation signal is a ...
George S. Kang, Stephanie Everett
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Vector quantized multipulse-LPC

ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
Both multipulse and stochastic coders render telephonic, or close to telephonic quality, for speech signals. Stochastic coders are more efficient from the point of view of bit rate and multipulse coders are the most efficient ones if we are looking for low computational cost.
Ramón García-Gómez, Francisco Javier Casajús-Quirós, Luis A. Hernández Gómez   +2 more
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Subband synthesized LPC vector quantization (SBS-LPC-VQ)

2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421), 2002
This paper presents a new LPC parameter quantization method-SubBand Synthesized LPC Vector Quantization (SBS-LPC-VQ). In the subband synthesis process, the relationships between subband spectra and whole band LPC spectrum are established and thus the vector quantized subband LPC parameters are mapped to the whole band LPC parameters.
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Time Evolution in LPC Spectrum Coding

IEEE Transactions on Speech and Audio Processing, 2004
Udgivelsesdato ...
Frank Norden, Thomas Eriksson
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Tree encoding of the LPC residual

ICASSP '84. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
In speech coding quantization has traditionally been done on a sample by sample basis. According to rate distortion theory there is much to be gained by applying multidimensional schemes to the quantization at low bit rates. This paper presents the use of a tree-encoder for quantization of the LPC-residual.
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A Hijacker’s Guide to the LPC Bus

2012
In this paper, we analyze the communication mechanism of trusted platform modules via the low-pin-count bus. While the trusted platform module is considered to be tamper resistant, the communication channel between this module and the rest of the trusted platform turns out to be comparatively insecure.
Johannes Winter, Kurt Dietrich
openaire   +1 more source

Harmonic excitation LPC (HE-LPC) speech coding at 2.3 kb/s

2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)., 2003
This paper presents an algorithm for encoding a speech signal at 2.3 kbit/s based on a uniform harmonic modeling of the excitation signal. The algorithm uses the robust pitch detection and efficient voicing analysis to split the LPC excitation into two bands.
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Variable model order LPC quantization

Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002
This paper presents a new method to apply variable bit-rate predictive quantization of the variable model order LPC parameters. In addition, the method is employed to interpolate the parameters within the analysis frame. The LPC model order selection algorithm is based on the characteristics of the input signal and on the performance of the LPC model ...
Pasi Ojala, Ari Lakaniemi
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The lightning protection of a complex of structures (LPCS)

IEEE Systems Technical Conference on Industrial and Commercial Power 2005., 2005
The standard IEC 61024 provides information for the design of lightning protection of structures (LPS). In determining the position of the air-termination system two methods are generally suggested: the protective angle method and the rolling sphere method.
PARISE, Giuseppe, MARTIRANO, Luigi
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Thinned lattice filter for LPC analysis

[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992
The authors introduce a spectral analysis technique for LPC systems based on using a high-order lattice filter having only few nonzero reflection coefficients. An efficient algorithm based on dynamic programming techniques has been developed to find the nonzero coefficients and their corresponding delays for the thinned lattice filter.
Cheung-Fat Chan, Kwok-Wah Law
openaire   +1 more source