ECHO SUPPRESSING SYSTEM, ECHO SUPPRESSING METHOD, RECORDING MEDIUM, ECHO SUPPRESSOR, SOUND OUTPUT DEVICE, AUDIO SYSTEM, NAVIGATION SYSTEM AND MOBILE OBJECT
First Claim
1. An echo suppressing system, comprising:
- a sound output device for outputting sound based on a sound signal, includinga passing section for allowing passage of a component of a different frequency band for each of a plurality of sound signals, anda plurality of sound output sections, each of which outputs sound based on each of the plurality of sound signals passed through the passing section;
a summer for summing the plurality of sound signals passed through the passing section to generate a reference sound signal;
a sound input device for converting input sound into a sound signal; and
an echo suppressor for suppressing echo based on the sound output by the sound output device from the sound input to the sound input device, includingan input section to which a sound signal is input from the sound input device as an observation sound signal, anda correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal.
1 Assignment
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Accused Products
Abstract
An echo suppressing system includes: a sound output device for outputting sound based on a sound signal, including a passing section for allowing passage of a component of a different frequency band, and a plurality of sound output sections, each of which outputs sound based on each of the plurality of sound signals passed through the passing section; a summer for summing the plurality of sound signals to generate a reference sound signal; a sound input device for converting input sound into a sound signal; and an echo suppressor for suppressing echo based on the sound output by the sound output device, including an input section to which a sound signal is input from the sound input device as an observation sound signal, and a correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal.
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Citations
20 Claims
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1. An echo suppressing system, comprising:
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a sound output device for outputting sound based on a sound signal, including a passing section for allowing passage of a component of a different frequency band for each of a plurality of sound signals, and a plurality of sound output sections, each of which outputs sound based on each of the plurality of sound signals passed through the passing section; a summer for summing the plurality of sound signals passed through the passing section to generate a reference sound signal; a sound input device for converting input sound into a sound signal; and an echo suppressor for suppressing echo based on the sound output by the sound output device from the sound input to the sound input device, including an input section to which a sound signal is input from the sound input device as an observation sound signal, and a correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An echo suppressing method using a sound output device for outputting sound based on a sound signal, a sound input device to which sound is input, and an echo suppressor for suppressing echo based on the sound output by the sound output device from the sound input to the sound input device, the echo suppressing method comprising:
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passing, using the sound output device, a component of a different frequency band for each of a plurality of sound signals; outputting, using the sound output device, sound based on a plurality of sound signals for which components of different frequency bands passed through; converting, using the sound input device, the input sound into a sound signal; summing, using the echo suppressor, a plurality of sound signals for which components of different frequency bands passed through, to generate a reference sound signal, acquiring, using the echo suppressor, a sound signal from the sound input device as an observation sound signal; and correcting, using the echo suppressor, the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal.
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15. A computer readable recording medium recording a program for making an echo suppressor execute, in cooperation with a sound output device for outputting sound based on a sound signal and a sound input device for generating a sound signal based on input sound, suppression of echo based on the sound output by the sound output device from the sound input to the sound input device, the program comprising:
correcting, using the echo suppressor, an observation sound signal so as to suppress echo included in the observation sound signal, based on a reference sound signal generated by summing a plurality of sound signals which are output by the sound output device and for which components of different frequency bands passed through, and the observation sound signal which is a sound signal generated by the sound input device.
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16. An echo suppressor for suppressing, in cooperation with a sound output device for outputting sound based on a sound signal and a sound input device for generating a sound signal based on input sound, echo based on the sound output by the sound output device from the sound input to the sound input device, the echo suppressor comprising
a summer for summing a plurality of sound signals which are output by the sound output device and for which components of different frequency bands passed through, to generate a reference sound signal; -
an input section to which a sound signal is input from the sound input device as an observation sound signal; and a correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal.
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17. A sound output device cooperating with a sound input device for generating a sound signal based on input sound and an echo suppressor for suppressing echo based on the sound output based on the generated sound signal from the sound input to the sound input device, comprising:
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a plurality of sound output sections for outputting sound based on a plurality of sound signals; and a passing section for allowing passage of a component of a different frequency band for each of a plurality of sound signals;
whereinthe plurality of sound output sections output sound based on a plurality of sound signals passed through the passing section.
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18. An audio system, comprising:
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a sound output device for outputting sound based on a sound signal, including a passing section for allowing passage of a component of a different frequency band for each of a plurality of sound signals, and a plurality of sound output sections, each of which outputs sound based on each of a plurality of sound signals passed through the passing section; a sound input device for converting input sound into a sound signal; a summer for summing a plurality of sound signals passed through the passing section to generate a reference sound signal; an echo suppressor for suppressing echo based on the sound output by the sound output device from the sound input to the sound input device, including an input section to which a sound signal is input from the sound input device as an observation sound signal, a correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal, and an output section for outputting the observation sound signal corrected by the correction section to a control device; and a controller including a control section for controlling at least one of the sound output device, the sound input device and the echo suppressor, an input section to which the output observation sound signal after correction is input, and a recognition section for performing a voice recognizing process based on the corrected observation sound signal input from the input section;
whereinthe control section performs control based on a recognition result obtained by the recognition section.
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19. A navigation system, comprising:
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a sound output device for outputting sound based on a sound signal, including a passing section for allowing passage of a component of a different frequency band for each of a plurality of sound signals, and a plurality of sound output sections, each of which outputs sound based on each of a plurality of sound signals passed through the passing section; a sound input device for converting input sound into a sound signal; an echo suppressor for suppressing echo based on the sound output by the sound output device from the sound input to the sound input device, including an input section to which a sound signal is input from the sound input device as an observation sound signal, a correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal, and an output section for outputting the corrected observation sound signal to the navigation device; a summer for summing a plurality of sound signals passed through the passing section to generate a reference sound signal; and a navigation device including a control section for performing a navigation process, an input section to which the output observation sound signal after correction is input, and a recognition section for performing a voice recognition process based on the corrected observation sound signal input from the input section;
whereinthe control section performs a navigation process based on a recognition result obtained by the recognition section.
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20. A mobile object, comprising
a sound output device for outputting sound based on a sound signal, including a passing section for allowing passage of a component of a different frequency band for each of a plurality of sound signals, and a plurality of sound output sections, each of which outputs sound based on each of a plurality of sound signals passed through the passing section; -
a sound input device for converting input sound into a sound signal; an echo suppressor for suppressing echo based on the sound output by the sound output device from the sound input to the sound input device, including an input section to which a sound signal is input from the sound input device as an observation sound signal, a correction section for correcting the observation sound signal so as to suppress echo included in the observation sound signal based on the observation sound signal and the reference sound signal, and an output section for outputting the corrected observation sound signal to the navigation device; a summer for summing a plurality of sound signals passed through the passing section to generate a reference sound signal; and a navigation device including a control section for performing a navigation process, an input section to which the output observation sound signal after correction is input, and a recognition section for performing a voice recognition process based on the corrected observation sound signal input from the input section;
whereinthe control section performs a navigation process based on a recognition result obtained by the recognition section.
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Specification