Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1981-12-28
1984-03-06
Kemeny, E. S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 35, 381 53, 364717, 331 78, 84 101, G10L 100
Patent
active
044358318
ABSTRACT:
Compression and synthesis techniques and related apparatus for time domain signals, particularly signals whose information content resides in the power spectrum such as speech and more particularly signals whose amplitude is aperiodic, such as unvoiced speech sounds. Compression techniques include eliminating serially redundant segments of information. Synthesis, particularly of unvoiced sounds which are sensitive to injected artificial periodicity, involves repeating sequentially portions of the same segmentrepresentative of the source signal, including commencing and terminating at different points each repetition, varying the length of the portion and reproducing the portion forwards and backwards in time. The invention finds application in speech compression and compact speech synthesis devices.
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patent: 3968448 (1976-07-01), Stenning
patent: 4194427 (1980-03-01), Deutsch
patent: 4214125 (1980-07-01), Mozer et al.
patent: 4327419 (1982-04-01), Deutsch et al.
patent: 4395703 (1983-07-01), Piosenka
Harding, "Generation of Random Digital Numbers", Radio and Electronic Engineer, Jun. 1968, pp. 369-375.
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