Method and apparatus for separating sound-source signal and method and device for detecting pitch
First Claim
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1. A sound-source signal separating apparatus, comprising:
- a sound-source signal enhancing unit operable to enhance a target sound-source signal in an input audio signal to produce an enhanced sound-source signal, the input audio signal including a mixture of acoustic signals from a plurality of sound sources picked up by a plurality of sound pickup devices;
a signal processor processing non-steady waveform signals only at a high frequency region in the enhanced sound-source signal by removing random portions from the non-steady waveform signals;
a pitch detector operable to detect a pitch of the target sound-source signal in the input audio signal; and
a sound-source signal separating unit operable to process signals at a middle and a lower frequency regions of the enhanced sound-source signal by separating the target sound-source signal from the input audio signal based on the detected pitch and the received middle and lower frequency signals of the enhanced sound-source signal,where information detected by the pitch detector is used to control only the sound-source signal separating unit, and not the signal processor.
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Abstract
In a sound-source signal separating method, a target sound-source signal in an input audio signal is enhanced, the input audio signal being from a mixture of acoustic signals from a plurality of sound sources picked up by a plurality of sound pickup devices. The pitch of the target sound-source signal in the input audio signal is detected, and the target sound-source signal is separated from the input audio signal based on the detected pitch and the enhanced sound-source signal.
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Citations
14 Claims
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1. A sound-source signal separating apparatus, comprising:
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a sound-source signal enhancing unit operable to enhance a target sound-source signal in an input audio signal to produce an enhanced sound-source signal, the input audio signal including a mixture of acoustic signals from a plurality of sound sources picked up by a plurality of sound pickup devices; a signal processor processing non-steady waveform signals only at a high frequency region in the enhanced sound-source signal by removing random portions from the non-steady waveform signals; a pitch detector operable to detect a pitch of the target sound-source signal in the input audio signal; and a sound-source signal separating unit operable to process signals at a middle and a lower frequency regions of the enhanced sound-source signal by separating the target sound-source signal from the input audio signal based on the detected pitch and the received middle and lower frequency signals of the enhanced sound-source signal, where information detected by the pitch detector is used to control only the sound-source signal separating unit, and not the signal processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A sound-source signal separating method, comprising:
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enhancing a target sound-source signal in an input audio signal to produce an enhanced sound-source signal, the input audio signal including a mixture of acoustic signals from a plurality of sound sources picked up by a plurality of sound pickup devices; processing non-steady waveform signals only at a high frequency region in the enhanced sound-source signal by removing random portions from the non-steady waveform signals; detecting a pitch of the target sound-source signal in the input audio signal; and separating the target sound-source signal from the input audio signal based on the detected pitch and the signals at a middle and a lower frequency regions of the enhanced sound-source signal, where information from the detected pitch is used to control only separating the target sound-source signal, not processing at a high frequency region in the enhanced sound-source signal.
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Specification