Speech signal transmitting and receiving apparatus with noise se

Details Speech signal transmitting and receiving apparatus with noise se Speech signal transmitting and receiving apparatus with noise se

1996-08-12

1998-03-24

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704222, 704223, 704225, 704226, 704228, 704233, G10L 914

Patent

active

057323909

ABSTRACT:
A speech signal transmitting receiving apparatus, such as a portable telephone set, includes a speech signal transmitting encoding circuit, a noise domain detection unit, a noise level detection unit and a controller. The speech signal transmitting encoding circuit compresses input speech signals by digital signal processing at a high efficiency. The noise domain detection unit detects the noise domain using an analytic pattern produced by the speech signal transmitting encoding circuit. The noise level detection unit detects the noise level of the noise domain detected by the noise domain detection unit. The controller controls the received sound volume responsive to the noise level detected by the noise level detection unit.

REFERENCES:
patent: 4628529 (1986-12-01), Borth et al.
patent: 4817157 (1989-03-01), Gerson
patent: 5111454 (1992-05-01), Hung et al.
patent: 5146504 (1992-09-01), Pinckley
patent: 5432859 (1995-07-01), Yang et al.
Rabiner and Schafer, Digital Processing of Speech Signals, Prentice Hall International, 1978, pp. 447-453.
IRA A. Gerson and Mark A. Jasiuk: "Vector Sum Excited Linear Prediction (VSELP) Speech Coding at 8 KBPS," Chicago Corporate Research and Development Center, Motorola Inbc., Schaumburg, IL, Int.Conf.on Acoustics,Speech & Signal Processing, Apr. 1990.

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