AUDIO SIGNAL PROCESSING DEVICE AND AUDIO SIGNAL PROCESSING METHOD

• US 20090310793A1
• Filed: 06/16/2009
• Published: 12/17/2009
• Est. Priority Date: 06/16/2008
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kawanishi, Hiroki, Asada, Kohei, Suzuki, Shiro, Ohkuri, Kazunobu, Itabashi, Tetsunori
• Granted Patent: US 8,761,406 B2
• Time in Patent Office: Days
• US Class Current: 381/58
• CPC Class Codes: G10L 21/0208 Noise filtering
• CPC Class Codes: H03G 3/32 the control being dependent upon ambient noise level or sound level
• CPC Class Codes: H03G 9/005 of digital or coded signals
• CPC Class Codes: H03G 9/10 for tone control and volume expansion or compression

Abstract

An audio signal processing device includes: a microphone configured to collect noise; an analyzing unit configured to analyze an audio signal collected by the microphone to detect the level and frequency property of the collected audio signal; and a signal processing unit configured to subject an audio signal to be reproduced to signal processing based on the analysis results of the analyzing unit.

Claims

1. An audio signal processing device comprising:

a microphone configured to collect noise;

analyzing means configured to analyze a first audio signal collected by said microphone to detect a level and frequency property of the first audio signal; and

signal processing means configured to subject a second audio signal to be reproduced to signal processing based on analysis results of said analyzing means.

2. The audio signal processing device according to claim 1, further comprising:

noise cancel signal forming means configured to form a noise cancel signal from the first audio signal collected by said microphone; and

adding means configured to add the noise cancel signal from said noise cancel signal forming means to an output signal from said signal processing means;

wherein said signal processing means subject said second audio signal to be reproduced to signal processing while taking a property of said noise cancel signal forming means into consideration.

3. The audio signal processing device according to claim 2, wherein said signal processing means perform one or more of

dynamic range control,

frequency property control, and

gain control.

4. The audio signal processing device according to claim 2, further comprising:

storage means configured to store one or more audio signals to be reproduced to which metadata, including genre, tempo, tonality, mean level, and beat is added;

selecting means configured to select the second audio signal to be reproduced based on analysis results from said analyzing means, and said metadata of the second audio signal stored in said storage means; and

playing processing means configured to read out the second audio signal selected by said selecting means from said storage means to form the second audio signal to be supplied to said signal processing means from the read audio signal.

5. An audio signal processing device comprising:

a microphone configured to collect noise;

analyzing means configured to analyze a first audio signal collected by said microphone to detect a level and frequency property of the collected audio signal;

storage means configured to store a second audio signal to be reproduced to which metadata, including genre, tempo, tonality, mean level, and beat is added;

selecting means configured to select the second audio signal to be reproduced based on analysis results from said analyzing means, and said metadata of the second audio signal stored in said storage; and

playing processing means configured to read out the second audio signal selected by said selecting means from said storage means to form the second audio signal for reproduction from the read audio signal.

6. The audio signal processing device according to claim 5, further comprising:

noise cancel signal forming means configured to form a noise cancel signal from the first audio signal collected by said microphone; and

adding means configured to add the noise cancel signal from said noise cancel signal forming means to an output signal from said playing processing means.

7. An audio signal processing method comprising steps of:

analyzing of a first audio signal collected through a microphone for noise collection to detect a level and frequency property of the first audio signal thereof; and

signal processing of a second audio signal to be reproduced, based on analysis results in said analyzing.

8. The audio signal processing method according to claim 7, further comprising the steps of:

forming of a noise cancel signal from the audio signal collected by said microphone for noise collection; and

adding of said formed noise cancel signal to the second audio signal;

wherein, in said signal processing, said second audio signal to be reproduced is subjected to signal processing while taking said forming into consideration.

9. The audio signal processing method according to claim 7, wherein, in said signal processing, one or more of

dynamic range control,

frequency property control, and

gain control,

are performed.

10. The audio signal processing method according to claim 7, further comprising steps of:

selecting of a selected audio signal to be reproduced based on the analysis results in said analyzing, and said metadata of the selected audio signal stored in storage means; and

reading out of the selected audio signal from said storage means to form the second audio signal for reproduction;

wherein one or more audio signals to be reproduced have been stored in said storage means to which the metadata, including genre, tempo, tonality, mean level, and beat, is added.

11. An audio signal processing method comprising the steps of:

analyzing of a first audio signal collected through a microphone for noise collection to detect a level and frequency property of the audio signal thereof;

selecting of a selected audio signal to be reproduced based on the analysis results in said analyzing, and metadata of one or more audio signals to be reproduced, stored in a predetermined recording medium to which the metadata, including genre, tempo, tonality, mean level, and beat, is added; and

reading out of the selected audio signal from said recording medium to form a second audio signal for reproduction from the read audio signal.

12. The audio signal processing method according to claim 11, further comprising the steps of:

forming of a noise cancel signal from the first audio signal collected by said microphone for noise collection; and

adding of the formed noise cancel signal to the second audio signal.

13. An audio signal processing device comprising:

a microphone configured to collect noise;

an analyzing unit configured to analyze a first audio signal collected by said microphone to detect a level and frequency property of the first audio signal; and

a signal processing unit configured to subject a second audio signal to be reproduced to signal processing based on analysis results of said analyzing unit.

14. An audio signal processing device comprising:

a microphone configured to collect noise;

an analyzing unit configured to analyze a first audio signal collected by said microphone to detect a level and frequency property of the collected audio signal;

a storage unit configured to store a second audio signal to be reproduced to which metadata, including genre, tempo, tonality, mean level, and beat is added;

a selecting unit configured to select a selected audio signal to be reproduced based on analysis results from said analyzing unit, and said metadata of the selected audio signal stored in said storage; and

a playing processing unit configured to read out the selected audio signal selected by said selecting unit from said storage unit to form the second audio signal for reproduction from the read selected audio signal.