Error detection method for sub-band coding

Details Error detection method for sub-band coding Error detection method for sub-band coding

1988-04-04

1989-05-16

Atkinson, Charles E.

Excavating

371 31, 381 46, G06F 1110

Patent

active

048316245

ABSTRACT:
A method and apparatus is disclosed for improving the quality of speech samples communicated via sub-band coding utilizing adaptive bit allocation, by providing error detection only on the adaptive bit allocation information. A first error detection code, such as a cyclic redundancy check (CRC), is calculated on the bit allocation parameters in the transmitter and sent to the receiver, where a second error detection code is calculated based upon the reconstructed bit allocation parameters. The transmitted error detection code is then used to determine if the received bit allocation information is correct, and if not, the frame of speech data is discarded. By protecting only the bit allocation information, additional speech frames may be salvaged from the error-prone channel, thus further increasing speech intelligibility.

REFERENCES:
patent: 4048443 (1977-09-01), Crochiere et al.
patent: 4216354 (1980-08-01), Esteban et al.
patent: 4291405 (1981-09-01), Jayant et al.
patent: 4375581 (1983-03-01), Jaynant
patent: 4455649 (1984-06-01), Esteban et al.
patent: 4464782 (1984-08-01), Beraud et al.
patent: 4516258 (1985-05-01), Ching et al.
patent: 4622680 (1986-11-01), Zinser
patent: 4688224 (1987-08-01), Dal Degan et al.
Aarskog, et al., "Real-Time Implentation of a 16 KBIT/s Speech Coder/Decoder Using Adaptive Sub-Band Coding Together with Time Domain Harmonic Scaling", Nordic Seminar on Digital Land Mobile Radiocommunication, (Feb. 5-7, 1985), pp. 27-34.
Ahlin, "Coding Methods for the Mobile Radio Channel", Nordic Seminar on Digital Land Mobile Radiocommunication, (Feb. 5-7, 1985), pp. 185-194.
Chien, "Memory Error Control: Beyond Parity", IEEE Spectrum, (Jul. 1973), pp. 18-23.
Chu, P., "Quadrature Mirror Filter Design for an Arbitrary Number of Equal Bandwidth Channels" IEEE Trans. Acoust., Speech, Signal Processing, vol. ASSP-31, pp. 203-218, Feb. 1985.
Kaltenmeier, et al., "A Subband Coder for Digital Speech Transmission in the Digital Cellular Radio Telephone System CD900", Nordic Seminar on Digital Land Mobile Radiocommunication, (Feb. 5-7, 1985), pp. 279-285.
Kittel, "Channel Coding for Digital Public Land Mobile Networks", Nordic Seminar on Digital Land Mobile Radiocommunication, (Feb. 5-7, 1985), pp. 57-66.
Max, J., "Quantizing for Minimum Distortion", IRE Trans. Inform. Theory, pp. 7-12, Mar. 1960.
McLaughlin, "Comparison of Sub-Band Coding and Adaptive Predictive Coding for Land Mobile Radio" Nordic Seminar on Digital Land Mobile Radiocommunication, (Feb. 5-7, 1985), pp. 115-124.
McLaughlin, et al., "Speech and Channel Coding for Digital Land-Mobile Radio", IEEE Journal on Selected Areas in Communications, vol. 6, No. 2, (Feb. 1988), pp. 332-345.
McNamara, John E., Technical Aspects of Data Communications, 2nd ed. (Bedford, MA: Digital Press, 1982), pp. 110-112.

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