Sound-field correcting apparatus and method therefor

• US 7,933,421 B2
• Filed: 05/16/2005
• Issued: 04/26/2011
• Est. Priority Date: 05/28/2004
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Asada, Kohei
• Primary Examiner(s): Chin; Vivian
• Assistant Examiner(s): MONIKANG, GEORGE C
• Application Number:
  US11/129,989
• Publication Number:
  US 20050265559A1
• Time in Patent Office: 2,171 Days
• Field of Search: 381/17, 381/18, 381/86, 381/56, 381/302, 381/303, 381/309, 381/310, 381/19
• US Class Current: 381/86
• 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
• CPC Class Codes: H04S 7/302 Electronic adaptation of stereophonic sound system to listener position or orientation H04S7/301 takes precedence
• CPC Class Codes: H04S 7/40 Visual indication of stereophonic sound image

Abstract

A sound-field correcting apparatus includes a sound-field correcting unit for executing, based on a correcting information, predetermined audio signal processing for correcting a sound field, an information acquiring unit for acquiring the correcting information on each position, a designating unit for designating, in a predetermined space range including the positions, a target position serving as a position at which sound-field correction is to be performed, a correcting information acquiring unit for acquiring, based on the correcting information on each position, correcting information corresponding to the target position designated by the designating unit, and a control unit for performing control based on the correcting information acquired by the correcting information acquiring unit so that the sound-field correcting unit executes the audio signal processing.

Claims

1. A sound-field correcting apparatus comprising:

information acquiring means for acquiring by measurement correcting information on each of a plurality of listening positions for listening to sound output;

sound-field correcting means for executing, based on the correcting information, predetermined audio signal processing for correcting a sound field formed at a target position by sound output from a plurality of sound sources;

designating means for designating thea target position in a predetermined space range including (a) said plurality of listening positions at which the information acquiring means acquires by measurement the correcting information and (b) at least one position other than the listening positions at which the information acquiring means acquires by measurement the correcting information, the target position serving as a position at which sound-field formation correction is to be performed;

correcting information acquiring means for acquiring, based on the correcting information on each of said plurality of listening positions, correcting information corresponding to the target position designated by said designating means; and

control means for performing control based on the correcting information acquired by said correcting information acquiring means so that said sound-field correcting means executes the predetermined audio signal processing.

2. The sound-field correcting apparatus according to claim 1, wherein:

said information acquiring means comprises acoustic measurement means for measuring a predetermined acoustic measurement item; and

in said information acquiring means, the correcting information on each of said plurality of listening positions is acquired as a result of measurements by said acoustic measurement means in which each of said plurality of listening positions is used as a measuring position.

3. The sound-field correcting apparatus according to claim 1, wherein:

said information acquiring means comprises acoustic measurement means for measuring a predetermined acoustic measurement item;

correcting information on at least one position among said plurality of listening positions is acquired by performing measurement by said acoustic measurement means in which said at least one position is used as a measuring position; and

correcting information on at least one position other than the measuring position among said plurality of listening positions is acquired by performing calculation using correcting information on the measuring position and a predetermined calculation parameter in accordance with each of the listening positions in the sound field.

4. The sound-field correcting apparatus according to claim 1, further comprising storage means for storing beforehand the correcting information on each of said plurality of listening positions,

wherein said information acquiring means acquires the correcting information on each of said plurality of listening positions by reading the correcting information stored in said storage means.

5. The sound-field correcting apparatus according to claim 1, further comprising storage means for storing beforehand correcting information on at least one reference position among said plurality of listening positions,

wherein:

said information acquiring means acquires the correcting information on the reference position by reading the correcting information stored in said storage means; and

correcting information on at least one position other than the reference position among said plurality of listening positions is acquired by performing calculation using the correcting information on the reference position and a predetermined calculation parameter in accordance with each of the listening positions in the sound field.

6. A sound-field correcting method for executing by a processor the sound-field correcting method comprising the steps of the processor:

acquiring by measurement correcting information on each of a plurality of listening positions for listening to sound output;

executing, based on the correcting information, predetermined audio signal processing for correcting a sound field formed at a target by sound output from a plurality of sound sources;

designating the position in a predetermined space range including (a) said plurality of listening positions at which correcting information is acquired by measurement and (b) at least one position other than the listening positions at which correcting information is acquired by measurement, the target position serving as a position at which sound-field formation correction is to be performed;

based on the correcting information on each of said plurality of listening positions, acquiring correcting information corresponding to the designated target position; and

performing control based on the correcting information acquired in the step of acquiring the correcting information so that the predetermined audio signal processing is executed.

7. A sound-field correcting apparatus comprising:

an information acquiring unit acquiring by measurement correcting information on each of a plurality of listening positions for listening to sound output;

a sound-field correcting unit executing, based on the correcting information, predetermined audio signal processing for correcting a sound field formed at a target position by sound output from a plurality of sound sources;

a designating unit designating the target position in a predetermined space range including (a) said plurality of listening positions at which the information acquiring unit acquires by measurement the correcting information and (b) at least one position other than the listening positions position at which the information acquiring unit acquires by measurement the correcting information, the target position serving as a position at which sound-field formation correction is to be performed;

a correcting information acquiring unit acquiring, based on the correcting information on each of said plurality of listening positions, correcting information corresponding to the target position designated by said designating unit; and

a control unit performing control based on the correcting information acquired by said correcting information acquiring unit so that said sound-field correcting unit executes the predetermined audio signal processing.