Patent
1980-12-22
1983-05-03
Kemeny, Emanuel S.
H04B 166
Patent
active
043821600
ABSTRACT:
A speech waveform is encoded to reduce storage capacity or transmission bandwidth requirements. The invention encodes two features of the time waveform, for example (1) duration of half-cycle, and (2) shape, e.g. number of maxima or minima of the waveform within that half cycle. The duration of each half cycle and the associated shape data constitute a pair of primary-code symbols. Each pair of primary code symbols may be represented by a single secondary code symbol using a mapping table. The number of secondary symbols may be reduced by grouping within the mapping table. Redundant sequences and inefficient transmission codes are deleted for further data reduction. Envelope peak value may be stuffed with the mapped signal for storage or transmission. Corresponding decoding provides speech synthesis.
REFERENCES:
patent: 3102165 (1963-08-01), Clapper
patent: 3104284 (1963-09-01), French et al.
patent: 3278685 (1966-10-01), Harper
patent: 3510640 (1970-05-01), Voelcker
patent: 3641496 (1972-02-01), Slavin
patent: 3684829 (1972-08-01), Patterson
patent: 3784754 (1974-01-01), Hagiwara et al.
patent: 3803358 (1974-04-01), Shirf et al.
patent: 4163120 (1979-07-01), Baumwolspiner
Robinson, A., "Results of a Prototype Television . . . ", Proc. IEEE, Mar. 1967, pp. 356-359.
Voelcker, "Toward a Unified Theory of Modulation" Part I: Phase-Envelope Relationships, Mar. '66, Proc. of the IEEE, vol. 54, No. 3, pp. 340-351.
Voelcker, "Toward a Unified Theory of Modulation" Part II: Zero Manipulation, May '66, Proc. of IEEE, vol. 54, No. 5, pp. 735-755.
Huffman, "A Method for the Construction of Minimum Redundancy Codes", Sep. 1952, Proc. IRE, vol. 40, pp. 1098-1101.
L. S. Moye, "Digital Transmission of Speech at Low Bit Rates", 1972, Electrical Communication, vol. 47, No. 4, pp. 412-423.
Levin, "Distribution of Zeros of Entire Functions", 1964, Transactions of Mathematical Monographs, Prov. R. I., American Mathematical Society, vol. 5.
Bond et al., "On Sampling the Zeros of Bandwidth Limited Signals", Sep. 1958, IRE Transactions & Information Theory, vol. IT-4, pp. 110-113.
Mathews, "Extremal Coding for Speech Transmission", Sep. 1959, IRE Transactions on Information Theory IT-5, pp. 129.
Sobolev et al., "Simple Methods of Clipped Speech Regeneration", 1969, Telecommunications, vol. 23, No. 3, p. 37.
Logan, "Information in the Zero Crossings of Bandpass Signals", Apr. 1977, The Bell System Tech. Journal, vol. 56, No. 4, p. 487.
Licklider, "Effects of Differentiation, Integration and Infinite Peak Clipping Upon the Intelligibility of Speech", Jan. 1958, Journal of the Acoustical Society of America, vol. 20, pp. 42-51.
Licklider, "The Intelligibility of Amplitude-Dichotomised, Time-Quantized Speech Waves", Nov. 1950, Journal of the Acoustical Society of America, vol. 22, No. 6, pp. 820-823.
Bond et al., "A Relation Between Zero Crossings and Fourier Coefficients for Bandwidth Limited Functions", Mar. 1960, IRE Transactions on Information Theory, (correspondence), IT-6, pp. 51-52.
Morris, "The Role of Zero Crossings in Speech Recognition and Processing", 1972, Conference on Speech Communication, L7, p. 446.
Kusch, "Segment, A Building Block of Speech", Sep. 1967, NTZ vol. 20, No. 9, pp. 495-501.
Gosling Harold W.
King Reginald A.
Kemeny Emanuel S.
National Research Development Corporation
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