Repetitive PCM data developing device

Details Repetitive PCM data developing device Repetitive PCM data developing device

1992-10-22

1994-10-18

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84627, G10H 1057, G10H 700

Patent

active

053570456

ABSTRACT:
The repetitive PCM data developing device of this invention extracts segment waveform PCM data which becomes basic structural part of repetitive PCM data from the waveform of PCM data converted from analog sound signal such as a melody and further extracts envelope PCM data showing the shape of envelope curve from the waveform of PCM data. And the envelope PCM data is divided into blocks for every equal part of amplitude, the segment waveform corresponding to the block is selected from the segment waveform PCM data, and the waveform information including the shape of segment waveform, frequency, amplitude and repetitive number is prepared for every block. Lastly, based on the waveform information, the repetitive PCM data having the blocks combined and continued is prepared.

REFERENCES:
patent: 4882963 (1989-11-01), Ichiki
patent: 4916996 (1990-04-01), Suzuki et al.
patent: 5147970 (1992-09-01), Obata
patent: 5194681 (1993-03-01), Kudo

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