Data processing: speech signal processing – linguistics – language – Speech signal processing – Application
Patent
1996-08-20
1999-11-09
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Application
704251, 704233, G10L 500
Patent
active
059831863
ABSTRACT:
Techniques for implementing adaptable voice activation operations for interactive speech recognition devices and instruments. Specifically, such speech recognition devices and instruments include an input sound signal power or volume detector in communication with a central CPU for bringing the CPU out of an initial sleep state upon detection of perceived voice exceeding a predetermined threshold volume level and is continuously perceived for at least a certain period of time. If both these conditions are satisfied, the CPU is transitioned into an active mode so that the perceived voice can be analyzed against a set of registered key words to determine if a "power on" command or similar instruction has been received. If so, the CPU maintains an active state in normal speech recognition processing ensues until a "power off" command is received. However, if the perceived and analyzed voice can not be recognized, it is deemed to be background noise and the minimum threshold is selectively updated to accommodate the volume level of the perceived but unrecognized voice. Other aspects include tailoring the volume level of the synthesized voice response according to the perceived volume level as detected by the input sound signal power detector, as well as modifying audible response volume in accordance with updated volume threshold levels.
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Edatsune Isao
Hasegawa Hiroshi
Inazumi Mitsuhiro
Miyazawa Yasunaga
Urano Osamu
Abebe Daniel
Gabrik Michael T.
Hudspeth David R.
Seiko Epson Corporation
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