SOUND REPRODUCING DEVICE AND SOUND REPRODUCTION METHOD
First Claim
1. A sound reproducing device, comprising:
- a communication unit that transmits/receives signals;
at least one sound output unit that outputs sound based upon a signal having been received at said communication unit;
a sound pickup unit that picks up sound containing noise and generates audio data;
an echo canceller unit that stores any echo signal contained in the signal received at said communication unit and generates a dummy echo signal to be used to prevent said echo signal from returning to a transmission side by attenuating said echo signal based upon said echo signal having been stored; and
a noise reducing unit that generates a cancel signal to be used to cancel noise based upon said audio data of the sound having been picked up at said sound pickup unit and outputs a composite signal generated by combining said dummy echo signal and said cancel signal.
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Accused Products
Abstract
A sound reproducing device is provided including a communication unit that transmits/receives signals; at least one sound output unit that outputs sound based upon a signal having been received, a sound pickup unit that picks up sound and generates audio data, an echo canceller unit that stores any echo signal contained in the signal having been received at the communication unit and generates a dummy echo signal by using the stored echo signal, and a noise reducing unit that generates a cancel signal to be used to cancel noise by using the audio data if the sound picked up at the sound pickup unit contains noise originating from a noise source and outputs a composite signal generated by combining the output signal from the echo canceller unit and the cancel signal.
42 Citations
16 Claims
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1. A sound reproducing device, comprising:
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a communication unit that transmits/receives signals; at least one sound output unit that outputs sound based upon a signal having been received at said communication unit; a sound pickup unit that picks up sound containing noise and generates audio data; an echo canceller unit that stores any echo signal contained in the signal received at said communication unit and generates a dummy echo signal to be used to prevent said echo signal from returning to a transmission side by attenuating said echo signal based upon said echo signal having been stored; and a noise reducing unit that generates a cancel signal to be used to cancel noise based upon said audio data of the sound having been picked up at said sound pickup unit and outputs a composite signal generated by combining said dummy echo signal and said cancel signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A sound reproduction method, comprising:
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a communication step in which signals are transmitted/received; a sound output step in which sound is output by a sound output unit based upon a signal having been received in said communication step; a dummy echo signal generation step in which any echo signal contained in a signal having been received in said communication step is stored and a dummy echo signal to be used to prevent said echo signal from returning to a transmission side is generated by attenuating said echo signal based upon said echo signal having been stored; a sound pickup step in which sound containing noise is picked up at a sound pickup unit and audio data are generated; a cancel signal generation step in which a cancel signal to be used to cancel the noise is generated based upon said audio data of the sound having been picked up in said sound pickup step; and an output step in which a composite signal generated by combining said dummy echo signal and said cancel signal is output. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification