Signal identifying device, code book changing device, signal ide

Details Signal identifying device, code book changing device, signal ide Signal identifying device, code book changing device, signal ide

1998-07-07

2000-12-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704220, G10L 1302

Patent

active

061673722

ABSTRACT:
A signal identifying device which can identify an input signal easily includes a pitch extracting (4Y) for extracting a pitch component of the input signal (S1), and energy calculating unit (4X) for calculating an energy component of the input signal, and identifying unit (4Z) for executing a predetermined operation to the pitch component and the energy component and for identifying whether the input signal is a voice signal or music signal. The voice signal generally has the characteristics evident in energy, and has strong periodicity (i.e., pitch component) comparing compared to the music signal.

REFERENCES:
patent: 4541110 (1985-09-01), Hopf et al.
patent: 4542525 (1985-09-01), Hopf
patent: 5298674 (1994-03-01), Yun
patent: 5375188 (1994-12-01), Serikawa et al.
patent: 5712953 (1998-01-01), Langs
patent: 5778335 (1998-07-01), Ubale et al.
patent: 5809472 (1998-09-01), Morrison

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