Speech data compression/expansion apparatus and method

Details Speech data compression/expansion apparatus and method Speech data compression/expansion apparatus and method

2005-09-06

2005-09-06

Lerner, Martin (Department: 2654)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Synthesis

C704S501000

Reexamination Certificate

active

06941267

ABSTRACT:
Waveform data is extracted by referring to an existing waveform dictionary. Regarding the waveform data, a use frequency used for speech synthesis is accumulated and stored. A compression method is gradually changed in accordance with the use frequency, whereby the waveform data is compressed and stored in the waveform dictionary. Furthermore, information on a compression method for each compressed waveform data is stored, and the compressed waveform data is expanded based on information regarding the compression method. Regarding the use frequency of the waveform data, one or a plurality of predetermined threshold values are determined, and in a plurality of use frequency ranges partitioned with threshold values, the waveform data belonging to a use frequency range with a lower use frequency is compressed at a correspondingly increased compression ratio.

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