Playback device calibration based on representation spectral characteristics

• US 9,864,574 B2
• Filed: 04/01/2016
• Issued: 01/09/2018
• Est. Priority Date: 04/01/2016
• Status: Active Grant

• Current Assignee: Sonos, Inc.
• Original Assignee: Sonos, Inc.
• Inventors: Hartung, Klaus, Jarvis, Simon, Sheen, Tim, Davies, Chris
• Primary Examiner(s): Patel, Hemant
• Application Number:
  US15/089,004
• Publication Number:
  US 20170286052A1
• Time in Patent Office: 648 Days
• Field of Search: 700 94
• CPC Class Codes: G06F 3/165 Management of the audio stream, e.g. setting of volume, audio stream path
• CPC Class Codes: H04R 2227/003 Digital PA systems using, e.g. LAN or internet
• CPC Class Codes: H04R 2227/005 Audio distribution systems for home, i.e. multi-room use
• CPC Class Codes: H04R 2227/007 Electronic adaptation of audio signals to reverberation of the listening space for PA
• CPC Class Codes: H04R 29/007 for public address systems public address systems per se H04R27/00
• CPC Class Codes: H04S 7/305 Electronic adaptation of stereophonic audio signals to reverberation of the listening space H04S7/301 takes precedence

Abstract

A computing device may maintain a database of representative spectral characteristics. The computing device may also receive particular spectral data associated with a particular playback environment corresponding to the particular playback device. Based on the particular spectral data, the computing device may identify one of the representative spectral characteristics from the database that substantially matches the particular spectral data, and then identify, in the database, an audio processing algorithm based on a) the identified representative spectral characteristic and b) at least one characteristic of the particular playback device. The computing device may then transmit, to the particular playback device, data indicating the identified audio processing algorithm.

Claims

1. A method of calibrating a particular playback device comprising:

maintaining, by a computing device, a database of representative spectral characteristics;

receiving, by the computing device, particular spectral data associated with a particular playback environment corresponding to the particular playback device;

based on the particular spectral data, identifying one of the representative spectral characteristics from the database that substantially matches the particular spectral data;

identifying, in the database, an audio processing algorithm based on a) the identified representative spectral characteristic and b) at least one characteristic of the particular playback device; and

transmitting, to the particular playback device, data indicating the identified audio processing algorithm.

2. The method of claim 1, wherein maintaining the database of representative spectral characteristics comprises:

receiving, by the computing device, a plurality of spectral data corresponding to a respective plurality of playback environments; and

determining, based on the plurality of received spectral data, the representative spectral characteristics.

3. The method of claim 2, wherein each spectral data in the plurality of spectral data comprises recorded audio playback data, and wherein the particular spectral data comprises recorded audio playback data from the particular playback device.

4. The method of claim 3, wherein each recorded audio playback data in the plurality of spectral data comprises a first duration, and wherein the recorded audio playback data from the particular playback device comprises a second duration that is less than the first duration.

5. The method of claim 3, wherein the particular spectral data comprises recorded audio playback of a pre-determined calibration tone.

6. The method of claim 3, wherein the particular spectral data comprises recorded audio playback of media content.

7. The method of claim 1, wherein the particular playback device is a first particular playback device, the method further comprising:

storing, by the computing device, an indication of the identified audio processing algorithm; and

transmitting, to a second particular playback device corresponding to the particular playback environment, data indicating the identified audio processing algorithm.

8. The method of claim 1, further comprising:

causing an indication of the identified audio processing algorithm to be stored at the particular playback device.

9. A computing device comprising:

a processor;

a non-transitory computer readable medium; and

program instructions stored on the non-transitory computer readable medium that, when executed by the processor, cause the computing device to perform functions comprising;

maintaining a database of representative spectral characteristics;

receiving particular spectral data associated with a particular playback environment corresponding to a particular playback device;

based on the particular spectral data, identifying one of the representative spectral characteristics from the database that substantially matches the particular spectral data;

identifying, in the database, an audio processing algorithm based on a) the identified representative spectral characteristic and b) at least one characteristic of the particular playback device; and

transmitting, to the particular playback device, data indicating the identified audio processing algorithm.

10. The computing device of claim 9, wherein maintaining the database of representative spectral characteristics comprises:

receiving a plurality of spectral data corresponding to a respective plurality of playback environments; and

determining, based on the plurality of received spectral data, the representative spectral characteristics.

11. The computing device of claim 10, wherein each spectral data in the plurality of spectral data comprises recorded audio playback data, and wherein the particular spectral data comprises recorded audio playback data from the particular playback device.

12. The computing device of claim 11, wherein each recorded audio playback data in the plurality of spectral data comprises a first duration, and wherein the recorded audio playback data from the particular playback device comprises a second duration that is less than the first duration.

13. The computing device of claim 11, wherein the particular spectral data comprises recorded audio playback of a pre-determined calibration tone.

14. The computing device of claim 11, wherein the particular spectral data comprises recorded audio playback of media content.

15. The computing device of claim 9, wherein the particular playback device is a first particular playback device, and wherein the program instructions, when executed by the processor, further cause the computing device to perform functions comprising:

storing an indication of the identified audio processing algorithm; and

transmitting, to a second particular playback device corresponding to the particular playback environment, data indicating the identified audio processing algorithm.

16. The computing device of claim 9, wherein the program instructions, when executed by the processor, further cause the computing device to perform functions comprising:

causing an indication of the identified audio processing algorithm to be stored at the particular playback device.

17. A playback device comprising:

a processor;

a microphone;

a non-transitory computer readable medium; and

program instructions stored on the non-transitory computer readable medium that, when executed by the processor, cause the playback device to perform functions comprising;

playing back first audio content in a playback environment;

recording, via the microphone, at least a portion of the played back first audio content;

while recording the played back first audio content, transmitting the recorded audio content to a computing device;

receiving, from the computing device, an indication that no further recorded audio content is required;

based on the indication that no further recorded audio content is required, discontinuing recording the played back first audio content;

receiving, from the computing device, data indicating an audio processing algorithm corresponding to the playback environment; and

applying the audio processing algorithm while playing back second audio content in the playback environment.

18. The playback device of claim 17, wherein playing back the first audio content comprises playing back a pre-determined calibration tone.

19. The playback device of claim 17, wherein transmitting the recorded audio content to the computing device further comprises transmitting, to the computing device, playback device characteristic information corresponding to the playback device.

20. The playback device of claim 17, wherein the program instructions, when executed by the processor, further cause the playback device to perform functions comprising:

storing an indication of the audio processing algorithm corresponding to the playback environment in memory.