Method for assigning a plurality of audio channels to a plurality of speakers, corresponding computer program product, storage means and manager node

• US 8,311,226 B2
• Filed: 03/25/2008
• Issued: 11/13/2012
• Est. Priority Date: 04/13/2007
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Lorgeoux, Mickaël, Thoumy, Francois
• Primary Examiner(s): Phan, Hai
• Application Number:
  US12/054,935
• Publication Number:
  US 20080253575A1
• Time in Patent Office: 1,694 Days
• Field of Search: 381/2, 381/80, 381/81, 381/58, 381/59, 381/300, 381/307, 700/94
• US Class Current: 381/2
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04R 2205/024 Positioning of loudspeaker enclosures for spatial sound reproduction
• CPC Class Codes: H04R 2420/07 Applications of wireless loudspeakers or wireless microphones
• CPC Class Codes: H04S 7/308 Electronic adaptation dependent on speaker or headphone connection

Abstract

A method for assigning audio channels of audio data content to speakers, each of which is associated with a different one of N speaker nodes of a wireless network. The method is performed by a manager node of the wireless network. The method includes, for each of the N speaker nodes, obtaining a piece of orientation information for each of N−1 other speaker nodes different from the given speaker node, regarding an orientation of a reception antenna of the given speaker node when receiving data sent by each of the N−1 other speaker nodes through the wireless network. The method also includes assigning a different one of the audio channels to a different one of the speaker nodes, as a function of N−1 pieces of orientation information obtained for each of the N speaker nodes.

Claims

1. A method for assigning a plurality of audio channels of audio data content to a plurality of speakers, each of the speakers being associated with a different one of a plurality of N speaker nodes of a wireless network, the method being performed by a manager node of the wireless network, wherein the method comprises:

for each given speaker node from among the N speaker nodes, obtaining a piece of orientation information for each of N−

1 other speaker nodes different from the given speaker node, regarding an orientation of a reception antenna of the given speaker node in a case that the reception antenna of the given speaker node is adapted to a reception of data sent by each of the N−

1 other speaker nodes through the wireless network; and

assigning a different one of the audio channels to a different one of the speaker nodes, as a function of N−

1 pieces of orientation information obtained for each of the N speaker nodes.

2. The method according to claim 1, wherein the assigning includes:

identifying a reference speaker node, from among the speaker nodes, as a function of the N−

1 pieces of orientation information obtained for each of the N speaker nodes;

assigning a reference audio channel, from among the audio channels, to the reference speaker node; and

assigning a different one of the audio channels, other than the reference audio channel, to a different one of the speaker nodes, other than the reference speaker node, as a function of the N−

1 pieces of orientation information obtained for each of the N speaker nodes, and the reference speaker node.

3. The method of assignment according to claim 2, wherein the reference speaker node is situated on an axis of symmetry of the wireless network.

4. The method according to claim 3, wherein, if two or more speaker nodes are situated on the axis of symmetry of the wireless network, the identifying of the reference speaker node includes:

obtaining, for each speaker node situated on the axis of symmetry, a parameter indicating a reception level, by the manager node, of data sent by each speaker node situated on the axis of symmetry, and

selecting the reference speaker node, from among the speaker nodes situated on the axis of symmetry, based on the parameters obtained.

5. The method according to claim 3, wherein the wireless network is a home cinema type of network and the reference speaker node is associated with one of the speakers that is to be assigned a front-center channel of the home cinema network.

6. The method according to claim 2, wherein the reception antenna of each speaker node is a directional antenna having a radiation pattern oriented along an axis of radiation,

wherein each piece of orientation information includes an angle formed by the axis of radiation of the reception antenna associated with the given speaker node and a predetermined angle reference axis, when the reception antenna associated with the given speaker node receives data transmitted by one of the N−

1 other speaker nodes,

and wherein the identifying of the reference speaker node includes determining based the angle included in each of the N−

1 pieces of orientation information obtained for each of the N speaker nodes, the reference speaker node as a speaker node with a maximum difference between a maximum signed angle value and a minimum signed angle value.

7. The method according to claim 2, wherein, the reception antenna of each speaker node is a directional antenna having a radiation pattern oriented along an axis of radiation,

wherein each piece of orientation information includes an angle formed by the axis of radiation of the reception antenna associated with the given speaker node and a sound diffusion axis of the speaker associated with the given speaker node when the reception antenna associated with the given speaker node receives data transmitted by one of the N−

1 other speaker nodes,

and wherein the identifying of the reference speaker node includes determining based on the angle included in each of the N−

1 pieces of orientation information obtained for each of the N speaker nodes, the reference speaker node as a speaker node for which the angle included in each of the obtained N−

1 pieces of orientation information are substantially symmetrical relative to an axis of sound diffusion of the speaker associated with the speaker node.

8. A non-transitory computer-readable storage medium storing instructions that, when executed a computer, cause the computer to perform a method for assigning a plurality of audio channels of audio data content to a plurality of speakers, each of the speakers being associated with a different one of a plurality of N speaker nodes of a wireless network the method being performed by a manager node of the wireless network, the method comprising:

for each given speaker node from among the N speaker nodes, obtaining a piece of orientation information for each of N−

1 other speaker nodes different from the given speaker node, regarding an orientation of a reception antenna of the given speaker node, in a case that said antenna of the given speaker nodes is adapted to a reception of data sent by each of the N−

1 other speaker nodes through the wireless network; and

assigning a different one of the audio channels to a different one of the speaker nodes, as a function of N−

1 pieces of orientation information obtained for each of the N speaker nodes.

9. A manager node of a wireless network, the manager node assigning a plurality of audio channels of audio data content to a plurality of speakers, each of the speakers being associated with a different one of a plurality of N speaker nodes of the wireless network the manager node comprising:

a wireless transceiver;

a microcontroller; and

a memory storing instructions that, when executed by the microcontroller, cause the manager node to;

for each given speaker node from among the N speaker nodes, obtaining a piece of orientation information for each of N−

1 other speaker nodes different from the given speaker node, regarding an orientation of a reception antenna of the given speaker node, in a case that the antenna is adapted to a reception of data sent by each of the N−

1 other speaker nodes through the wireless network; and

assigning a different one of the audio channels to a different one of the speaker nodes, as a function of N−

1 pieces of orientation information obtained for each of the N speaker nodes.

10. The manager node according to claim 9, wherein the memory stores instructions that, when executed by the microcontroller, cause the manager node to:

identify a reference speaker node, from among the N speaker nodes, as a function of the N−

1 pieces of orientation information obtained for each of the N speaker nodes;

assign a reference audio channel, from among the audio channels, to the reference speaker node; and

assign a different one of the audio channels, other than the reference audio channel, to a different one of the speaker nodes, other than the reference speaker node, as a function of the N−

1 pieces of orientation information obtained for each of the N speaker nodes, and the reference speaker node.

11. The manager node according to claim 10, wherein the reference speaker node is situated on an axis of symmetry of the wireless network.

12. The manager node according to claim 11, wherein the memory stores instructions that, when executed by the microcontroller, cause the manager node to:

obtain, for each speaker node situated on the axis of symmetry, of a parameter indicating a reception level, by the manager node, of data recieved by each speaker node situated on the axis of symmetry, and

select the reference speaker node, from among the speaker nodes situated on the axis of symmetry, based on the parameter obtained for each speaker node situated on the axis of symmetry.

13. The manager node according to claim 11, wherein the wireless network is a home cinema type of network and reference speaker node is associated with the speaker that is to be assigned a front-center channel of the home cinema network.

14. The manager node according to claim 10, wherein the reception antenna of each speaker node is a directional antenna having a radiation pattern oriented along an axis of radiation,

wherein each piece of orientation information antenna of a first speaker node includes an angle formed by the axis of radiation of the reception antenna associated with the given speaker node and a predetermined angle reference axis, when the reception antenna associated with the given speaker node receives data transmitted by one of the N−

1 other speaker nodes,

and wherein the memory stores instructions that, when executed by the microcontroller, cause the manager node to determine, based on the angle included in each of the N−

1 pieces of orientation information obtained for each of the N speaker node nodes, the reference speaker node as a speaker node with a maximum difference between a maximum signed angle value and a minimum signed angle value.

15. The manager node according to claim 10, wherein the reception antenna of each speaker node is a directional antenna having a radiation pattern-is oriented along an axis of radiation,

wherein each piece of orientation information includes an angle formed by the axis of radiation of the reception antenna associated with the given speaker node and a sound diffusion axis of the speaker associated with the given speaker node, when the reception antenna associated with the given speaker node receives data transmitted by one of the N−

1 other speaker nodes,

and wherein the memory stores instructions that, when executed by the microcontroller, cause the manager node to determine based on the angle included in each of the N−

1 pieces of orientation information obtained for each of the N speaker nodes, the reference speaker node as a speaker node for which the angle included in each of the obtained N−

1 pieces of orientation information are substantially symmetrical relative to an axis of sound diffusion of the speaker associated with the speaker node.