US 2014/0153743 A1Published application

Audio processing device and method

AssigneeFujitsu Limited

InventorsTakeshi OTANI, Taro TOGAWA, Chisato ISHIKAWA, Masanao SUZUKI

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Abstract

An audio processing device includes a setting section that sets a reproduction sampling frequency Fplay and a recording sampling frequency Frec higher than Fplay, a digital-to-analogue converter that based on Fplay converts a sound source signal that is a digital signal into a reproduction signal that is an analogue signal, an analogue-to-digital converter that based on Frec converts a recording signal that is an analogue signal converter into an input signal that is a digital signal, a signal separator that separates the input signal into a low region signal contained in a band of less than Fplay and a high region signal contained in a band of the Fplay and higher, and a breakup detector that detects whether or not breakup is occurring in the reproduced sound based on power of the high region signal.

Claims21

Dependent claims

An audio processing device comprising:

a setting section that sets a reproduction sampling frequency and a recording sampling frequency higher than the reproduction sampling frequency;
a digital-to-analogue converter that, based on the reproduction sampling frequency, converts a sound source signal that is a digital signal into a reproduction signal that is an analogue signal;
an analogue-to-digital converter that, based on the recording sampling frequency, converts a recording signal that is an analogue signal obtained by recording sound that has been reproduced according to the reproduction signal converted by the digital-to-analogue converter into an input signal that is a digital signal;
a signal separator that separates the input signal converted by the analogue-to-digital converter into a low region signal contained in a band of less than the reproduction sampling frequency and a high region signal contained in a band of the reproduction sampling frequency and higher;
and
a breakup detector that detects whether or not breakup is occurring in the reproduced sound based on power of the high region signal, or based on a difference or ratio between power of the high region signal and power of the low region signal.

3 more elements

An audio processing method comprising:

setting a reproduction sampling frequency and a recording sampling frequency higher than the reproduction sampling frequency;
based on the reproduction sampling frequency, converting a sound source signal that is a digital signal into a reproduction signal that is an analogue signal;
based on the recording sampling frequency, converting a recording signal that is an analogue signal obtained by recording sound that has been reproduced according to the converted reproduction signal into an input signal that is a digital signal;
separating the converted input signal into a low region signal contained in a band of less than the reproduction sampling frequency and a high region signal contained in a band of the reproduction sampling frequency and higher;
and
detecting whether or not breakup is occurring in the reproduced sound based on power of the high region signal, or based on a difference or ratio between power of the high region signal and power of the low region signal.

3 more elements

A recording medium having recorded thereon an audio processing program for causing a computer to execute a process, the process comprising:

setting a reproduction sampling frequency and a recording sampling frequency higher than the reproduction sampling frequency;
based on the reproduction sampling frequency, converting a sound source signal that is a digital signal into a reproduction signal that is an analogue signal;
based on the recording sampling frequency, converting a recording signal that is an analogue signal obtained by recording sound that has been reproduced according to the converted reproduction signal into an input signal that is a digital signal;
separating the converted input signal into a low region signal contained in a band of less than the reproduction sampling frequency and a high region signal contained in a band of the reproduction sampling frequency and higher;
and
detecting whether or not breakup is occurring in the reproduced sound based on power of the high region signal, or based on a difference or ratio between power of the high region signal and power of the low region signal.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/080,373Filed 14 Nov 2013
Priority: JP 2012-2646503 Dec 2012
Published: 5 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04R 3/04
Circuits for transducers: for correcting frequency response
G10L 21/0208
Speech enhancement, e.g. noise reduction or echo cancellation: noise filtering
H03G 5/18
Automatic control: in untuned amplifiers
H04R 3/007
Circuits for transducers: protection circuits for transducers

Family

US 9,426,570 B2Related patent
US 2014/0153743 A1This patent

From the US filing history. Foreign family members aren’t listed.

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