Sound reproducing device and sound reproduction method for echo cancelling and noise reduction
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 an 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 of said communication unit 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.
21 Citations
9 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 an 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 of said communication unit 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, 9)
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Specification