Method and apparatus for calibrating an audio playback system

• US 9,402,095 B2
• Filed: 11/19/2013
• Issued: 07/26/2016
• Est. Priority Date: 11/19/2013
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Vilermo, Miikka Tapani, Lehtiniemi, Arto Juhani, Tammi, Mikko Tapio, Laaksonen, Lasse Juhani
• Primary Examiner(s): Flanders, Andrew C
• Application Number:
  US14/084,108
• Publication Number:
  US 20150138370A1
• Time in Patent Office: 980 Days
• US Class Current: 1/1
• CPC Class Codes: H04N 17/00 Diagnosis, testing or measuring for television systems or their details
• CPC Class Codes: H04N 2017/006 for television sound
• CPC Class Codes: H04N 21/4223 Cameras H04N23/00 takes precedence
• CPC Class Codes: H04N 21/439 Processing of audio elementary streams
• CPC Class Codes: H04N 21/44218 Detecting physical presence or behaviour of the user, e.g. using sensors to detect if the user is leaving the room or changes his face expression during a TV program methods or arrangements for recognising human body or animal bodies or body parts G06V40/10; methods or arrangements for acquiring or recognising human faces, facial parts, facial sketches, facial expressions G06V40/16; methods or arrangements for recognising movements or behaviour G06V40/20; arrangements for identifying users in broadcast systems H04H60/45
• CPC Class Codes: H04N 5/607 for more than one sound signal, e.g. stereo, multilanguages H04N5/602 takes precedence
• CPC Class Codes: H04S 2400/11 Positioning of individual sound objects, e.g. moving airplane, within a sound field H04S2420/13 takes precedence
• CPC Class Codes: H04S 7/302 Electronic adaptation of stereophonic sound system to listener position or orientation H04S7/301 takes precedence

Abstract

A method, apparatus and computer program product are provided to facilitate calibration of an audio playback system with a video presented upon a display. In the context of a method, an image including a display from a first location is received. The method also includes determining a dimension of the display within the image and determining an angle of the display based upon the dimension of a display determined within the image and the first location. The method further includes permitting an audio playback system associated with the display to be calibrated, such as with a video to be presented upon the display, based upon the determined angle. A corresponding apparatus and computer program product are also provided.

Claims

1. A method comprising:

receiving an image comprising a display from a first location;

determining, with a processor, a dimension of the display within the image;

determining an angle of the display based upon the dimension of the display determined within the image and the first location; and

causing an audio playback system associated with the display to be calibrated based upon determining a measure of calibration, wherein the measure of calibration comprises determining a modified azimuth of a source of audio signals based upon the determined angle.

2. A method according to claim 1 wherein causing the audio playback system to be calibrated comprises causing the angle to be provided to a remote audio processor of the audio playback system to calibrate audio.

3. A method according to claim 1 wherein causing the audio playback system to be calibrated comprises determining the measure of calibration and causing the measure of calibration to be provided to a remote audio processor of the audio playback system.

4. A method according to Claim 1 wherein determining the modified azimuth comprises determining the modified azimuth in an instance when the source of audio signals include one or more auditory objects that contain speech.

5. A method according to claim 3 wherein determining a measure of calibration comprises converting left and right channels of multichannel audio into mid and side channels, modifying the mid and side channels based upon a target audio image width and converting the mid and side channels, as modified, to left and right channels of multichannel audio.

6. A method according to claim 1 wherein receiving the image comprises causing the image to be captured by a camera of a mobile device at the first location from which the display will be viewed.

7. A method according to claim 1 further comprising determining information regarding keystoning from the image comprising the display and causing the information regarding keystoning to be provided so as to permit modification of the video presented upon the display to reduce the keystoning.

8. A method according to claim 1 further comprising determining a center of the display based upon the image comprising the display.

18. A method according to claim 5 wherein the target audio image width changes in response to at least the modified azimuth of the source of audio signals.

9. An apparatus comprising:

at least one processor; and

at least one memory communicatively coupled to the at least one processor, wherein the at least one memory includes computer program code for facilitating calibration of an audio playback system, the computer program code, when executed by the at least one processor, configured to cause the apparatus to at least;

receive an image comprising a display from a first location;

determine a dimension of the display within the image;

determine an angle of the display based upon the dimension of the display determined within the image and the first location; and

cause the audio playback system associated with the display to be calibrated based upon determining a measure of calibration, wherein the measure of calibration comprises determining a modified azimuth of a source of audio signals based upon the determined angle.

10. An apparatus according to claim 9 wherein the computer program code, when executed by the at least one processor, is configured to cause the apparatus to cause the audio playback system to be calibrated by causing the angle to be provided to a remote audio processor of the audio playback system to calibrate audio.

11. An apparatus according to claim 9 wherein the computer program code, when executed by the at least one processor, is configured to cause the apparatus to cause the audio playback system to be calibrated by determining the measure of calibration and causing the measure of calibration to be provided to a remote audio processor of the audio playback system.

12. An apparatus according to claim 11 wherein the computer program code, when executed by the at least one processor, is configured to cause the apparatus to determine a measure of calibration by converting left and right channels of multichannel audio into mid and side channels, modifying the mid and side channels based upon a target audio image width and converting the mid and side channels, as modified, to left and right channels of multichannel audio.

13. An apparatus according to claim 9 wherein the computer program code, when executed by the at least one processor, is configured to cause the apparatus to receive the image by causing the image to be captured by a camera of a mobile device at the first location from which the display will be viewed.

19. An apparatus according to claim 12 wherein the target audio image width changes in response to at least the modified azimuth of the source of audio signals.

14. A computer program product comprising at least one non-transitory computer-readable storage medium having computer-executable program code portions stored therein, the computer-executable program code portions comprising program code instructions for:

receiving an image comprising a display from a first location;

determining a dimension of the display within the image;

determining an angle of the display based upon the dimension of the display determined within the image and the first location; and

causing an audio playback system associated with the display to be calibrated based upon determining a measure of calibration, wherein the measure of calibration comprises determining a modified azimuth of a source of audio signals based upon the determined angle.

15. A computer program product according to claim 14 wherein the program code instructions for causing the audio playback system to be calibrated comprise program code instructions for causing the angle to be provided to a remote audio processor of the audio playback system to calibrate audio.

16. A computer program product according to claim 14 wherein the program code instructions for causing the audio playback system to be calibrated comprise program code instructions for determining the measure of calibration and program code instructions for causing the measure of calibration to be provided to a remote audio processor of the audio playback system.

17. A computer program product according to claim 16 wherein the program code instructions for determining a measure of calibration comprise program code instructions for converting left and right channels of multichannel audio into mid and side channels, program code instructions for modifying the mid and side channels based upon a target audio image width and program code instructions for converting the mid and side channels, as modified, to left and right channels of multichannel audio.

20. A computer program product according to claim 17 wherein the target audio image width changes in response to at least the modified azimuth of the source of audio signals.