Digital system and method for compressing speech signals for...

Details Digital system and method for compressing speech signals for... Digital system and method for compressing speech signals for...

H - Electricity

03

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H03M 7/46 (2006.01) G10L 11/00 (2006.01) G10L 11/02 (2006.01) G10L 11/04 (2006.01) G10L 11/06 (2006.01) G10L 19/00 (2006.01)

Patent

CA 1307590

DIGITAL SYSTEM AND METHOD FOR COMPRESSING SPEECH SIGNALS FOR STORAGE AND TRANSMISSION 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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