Wideband speech coder and decoder that band divides an input spe

Details Wideband speech coder and decoder that band divides an input spe Wideband speech coder and decoder that band divides an input spe

1997-06-23

1999-08-10

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704205, G01L 302

Patent

active

059373784

ABSTRACT:
An LPC analyzer calculates LPC coefficients from a speech signal input from an input terminal through LPC analysis of the speech signal. An LPC coder codes the LPC coefficients. An impulse response circuit calculates an impulse response from the LPC coefficients obtained by the decoding. A first band divider divides the band of the impulse response. LPC analyzers calculate LPC coefficients for each subband. A second band divider divides the band of the input speech signal input from the input terminal and produces a speech signal for each subband. Coders code an excitation signal for each respective subband by using the LPC coefficients of the respective subband and the speech signal of the respective subband. A multiplexer outputs each code as a modulation signal.

REFERENCES:
patent: 4817141 (1989-03-01), Taguchi
patent: 5222189 (1993-06-01), Fielder
patent: 5230038 (1993-07-01), Fielder et al.
patent: 5367608 (1994-11-01), Veldhuis et al.
patent: 5394473 (1995-02-01), Davidson
patent: 5479562 (1995-12-01), Fielder et al.
patent: 5491773 (1996-02-01), Veldhuis et al.
patent: 5633980 (1997-05-01), Ozawa
patent: 5651090 (1997-07-01), Moriya et al.
patent: 5657349 (1997-08-01), Sugiyama
patent: 5684920 (1997-11-01), Iwakami et al.
M. Yong et al., "Subband Vector Excitation Coding With Adaptive Bit-Allocation", vol. 2, No. Conf. 14, pp. 743-746, XP000090217, (May 23, 1989).
Jacovo et al., "Some Experiment of 7 kHz Audio Coding at 16 kbit/s", IEEE, (1989), pp. 192-195.
Yong et al., "Subband Vector Excitation Coding with Adaptive Bit-Allocation", IEEE, ICASSP, S14.3, (1989), pp. 743-746.
Esteban et al., "Application of Quadrature Mirror Filters to Split Band Voice Coding Schemes", IEEE Proceeding of ICASSP, (1977), pp. 191-194.
"Linear Predictive Coding of Speech".
Paliwal et al., "Efficient Vector Quantization of LPC Parameters at 24 Bits/Frame", IEEE Transactions on Speech and Audio Processing, vol. 1, No. 1, (1993).
Schroeder et al., "Code-Excited Linear Prediction (CELP):High-Quality Speech at Very Low Bit Rates", IEEE Proceedings of ICASSP-85, (1985), pp. 937-940.
"Telecommunication Standardization Sector", (ITU-T) COM15-153-E, (1995).
Soong et al., "Line Spectrum Pair (LSP) and Speech Data Compression", IEEE, (1984).

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