Signal processing apparatus having voice activity detection unit and related signal processing methods
First Claim
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1. A signal processing apparatus, comprising:
- a speech recognition system; and
a voice activity detection unit, coupled to the speech recognition system, the voice activity detection unit arranged for detecting whether an audio signal is a voice signal or not, and outputting a voice activity detection result to the speech recognition system to control whether the speech recognition system should perform speech recognition upon the audio signal;
wherein only when the speech recognition system enters a power saving mode from a normal mode, the voice activity detection unit is enabled; and
when the speech recognition system is in the normal mode, the voice activity detection unit is disabled.
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Abstract
A signal processing apparatus includes a speech recognition system and a voice activity detection unit. The voice activity detection unit is coupled to the speech recognition system, and arranged for detecting whether an audio signal is a voice signal and accordingly generating a voice activity detection result to the speech recognition system to control whether the speech recognition system should perform speech recognition upon the audio signal.
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Citations
18 Claims
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1. A signal processing apparatus, comprising:
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a speech recognition system; and a voice activity detection unit, coupled to the speech recognition system, the voice activity detection unit arranged for detecting whether an audio signal is a voice signal or not, and outputting a voice activity detection result to the speech recognition system to control whether the speech recognition system should perform speech recognition upon the audio signal; wherein only when the speech recognition system enters a power saving mode from a normal mode, the voice activity detection unit is enabled; and
when the speech recognition system is in the normal mode, the voice activity detection unit is disabled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A signal processing method, comprising:
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detecting whether an audio signal is a voice signal or not, and outputting a voice activity detection result to a speech recognition system to control whether the speech recognition system should perform speech recognition upon the audio signal; wherein the steps of detecting whether the audio signal is the voice signal are performed only when the speech recognition system enters a power saving mode from a normal mode; and
the steps of detecting whether the audio signal is the voice signal are not performed when the speech recognition system is in the normal mode. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification