ACOUSTIC SIGNAL PROCESSING DEVICE AND ACOUSTIC SIGNAL PROCESSING METHOD

• US 20110007905A1
• Filed: 02/26/2008
• Published: 01/13/2011
• Est. Priority Date: 02/26/2008
• Status: Abandoned Application

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Sato, Shinichi, Tomoda, Nobuhiro
• Application Number:
  US12/866,348
• Publication Number:
  US 20110007905A1
• Time in Patent Office: Days
• US Class Current: 381/59
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04S 7/301 Automatic calibration of stereophonic sound system, e.g. with test microphone

Abstract

In a processing control unit 119, a correction measurement unit measures an aspect of sound field correction processing executed upon an acoustic signal UAS received from a sound source device 920₀, that is a particular external device. And if an acoustic signal NAS or an acoustic signal NAD other than the acoustic signal UAS is selected as an acoustic signal to be supplied to speaker units 910_L, through 910_SR, then a sound field correction unit 113 generates an acoustic signal APD by executing sound field correction processing for the aforementioned measured aspect upon the selected acoustic signal. Due to this, whichever of the plurality of acoustic signals UAS, NAS, and NAD is selected, it is possible to supply that signal to the speaker units 910_L, through 910_SR in a state in which uniform sound field correction processing has been executed thereupon.

Claims

1-10. -10. (canceled)

11. An acoustic signal processing device that creates acoustic signals that are supplied to a plurality of speakers, characterized by comprising:

a reception part configured to receive an acoustic signal from each of a plurality of external devices;

a measurement part configured to measure an aspect of sound field correction processing executed upon an acoustic signal received from a specified one of said plurality of external devices; and

a generation part configured to generate acoustic signals by executing sound field correction processing upon said selected acoustic signal for the aspect measured by said measurement part, when an acoustic signal received from an external device other than said specified external device has been selected, as acoustic signals to be supplied to said plurality of speakers.

12. An acoustic signal processing device according to claim 11, characterized in that said measurement part measures said aspect of said sound field correction processing by analyzing an acoustic signal generated by said specified external device from audio contents for measurement.

13. An acoustic signal processing device according to claim 11, characterized in that:

said specified external device is mounted to a mobile unit; and

the acoustic signal received from said specified external device is an acoustic signal for which sound field correction processing corresponding to a sound field space internal to said mobile unit has been executed upon an original acoustic signal.

14. An acoustic signal processing device according to claim 11, characterized in that said sound field correction processing includes synchronization correction processing to correct the timing of audio output from each of said plurality of speakers.

15. An acoustic signal processing device according to claim 14, characterized in that:

during measurement with said measurement part of an aspect of synchronization correction processing included in said sound field correction processing, as individual source acoustic signals corresponding to each of said plurality of speakers in the original acoustic signal that corresponds to the acoustic signal from said specified external device, signals in pulse form are used that are generated simultaneously at a period that is more than twice as long as the maximum mutual delay time period difference imparted by said synchronization processing to each of said individual source acoustic signals; and

said measurement part measures an aspect of said synchronization correction processing on the basis of the acoustic signal from said specific external device, after half of said period has elapsed from the time point at which a signal in pulse form has been initially detected in any one of said individual acoustic signals of the acoustic signal from said specified external device.

16. An acoustic signal processing device according to claim 11, characterized in that said sound field correction processing includes at least one of audio volume balance correction processing in which the balance between the audio volumes outputted from each of said plurality of speakers is corrected, and frequency characteristic correction processing in which the frequency characteristics of the acoustic signals supplied to each of said plurality of speakers is corrected.

17. An acoustic signal processing device according to claim 11, characterized in that the acoustic signals received from those of said plurality of external devices other than said specified external device are non-corrected acoustic signals upon which sound field correction processing has not been executed.

21. An acoustic signal processing device according to claim 12, characterized in that:

said specified external device is mounted to a mobile unit; and

the acoustic signal received from said specified external device is an acoustic signal for which sound field correction processing corresponding to a sound field space internal to said mobile unit has been executed upon an original acoustic signal.

22. An acoustic signal processing device according to claim 12, characterized in that said sound field correction processing includes synchronization correction processing to correct the timing of audio output from each of said plurality of speakers.

23. An acoustic signal processing device according to claim 13, characterized in that said sound field correction processing includes synchronization correction processing to correct the timing of audio output from each of said plurality of speakers.

24. An acoustic signal processing device according to claim 12, characterized in that said sound field correction processing includes at least one of audio volume balance correction processing in which the balance between the audio volumes outputted from each of said plurality of speakers is corrected, and frequency characteristic correction processing in which the frequency characteristics of the acoustic signals supplied to each of said plurality of speakers is corrected.

25. An acoustic signal processing device according to claim 13, characterized in that said sound field correction processing includes at least one of audio volume balance correction processing in which the balance between the audio volumes outputted from each of said plurality of speakers is corrected, and frequency characteristic correction processing in which the frequency characteristics of the acoustic signals supplied to each of said plurality of speakers is corrected.

26. An acoustic signal processing device according to claim 14, characterized in that said sound field correction processing includes at least one of audio volume balance correction processing in which the balance between the audio volumes outputted from each of said plurality of speakers is corrected, and frequency characteristic correction processing in which the frequency characteristics of the acoustic signals supplied to each of said plurality of speakers is corrected.

27. An acoustic signal processing device according to claim 15, characterized in that said sound field correction processing includes at least one of audio volume balance correction processing in which the balance between the audio volumes outputted from each of said plurality of speakers is corrected, and frequency characteristic correction processing in which the frequency characteristics of the acoustic signals supplied to each of said plurality of speakers is corrected.

28. An acoustic signal processing device according to claim 12, characterized in that the acoustic signals received from those of said plurality of external devices other than said specified external device are non-corrected acoustic signals upon which sound field correction processing has not been executed.

29. An acoustic signal processing device according to claim 13, characterized in that the acoustic signals received from those of said plurality of external devices other than said specified external device are non-corrected acoustic signals upon which sound field correction processing has not been executed.

30. An acoustic signal processing device according to claim 14, characterized in that the acoustic signals received from those of said plurality of external devices other than said specified external device are non-corrected acoustic signals upon which sound field correction processing has not been executed.

18. An acoustic signal processing method that creates acoustic signals that are supplied to a plurality of speakers, characterized by including:

a measurement process of measuring an aspect of sound field correction processing executed upon an acoustic signal received from a specified one of a plurality of external devices; and

a generation process of, when an acoustic signal received from an external device other than said specified external device has been selected, as acoustic signals to be supplied to said plurality of speakers, generating acoustic signals by executing sound field correction processing upon said selected acoustic signal for the aspect measured by said measurement process.

19. An acoustic signal processing program, characterized in that it causes a calculation part to execute the acoustic signal processing method according to claim 18.

20. A recording medium, characterized in that an acoustic signal processing program according to claim 19 is recorded thereupon in a manner that is readable by a calculation part.