Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1986-07-21
1989-01-31
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 30, G10L 500
Patent
active
048022217
ABSTRACT:
The system and method of the invention operates upon a serial bit stream of speech encoded data by reading the data in fixed length frames. Each frame is classified as to whether the frame represents voiced, unvoiced, or a silence condition. For a voiced frame, the pitches are detected. The bits of the voiced frame are then compared with the bits of prior received voiced frames, on a pitch basis, so as to detect repetition. When repetition is detected, the repetition count, the pitch period, and the one set of the repetitive pitch bits are stored ready for transmission. The compressed data is reconstructed by utilizing a decoder which interprets the stored information and causes reinsertion of the repetitions.
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Dugas Edward
Hawk Jr. Wilbert
Kemeny Emanuel S.
NCR Corporation
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