Bi-directional interconnect for communication between a renderer and an array of individually addressable drivers

Patent metadata

Field	Value
Publication number	US-9622010-B2
Application number	US-201314420890-A
Country	US
Kind code	B2
Filing date	Aug 26, 2013
Priority date	Aug 31, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

Embodiments are directed to an interconnect for coupling components in an object-based rendering system comprising: a first network channel coupling a renderer to an array of individually addressable drivers projecting sound in a listening environment and transmitting audio signals and control data from the renderer to the array, and a second network channel coupling a microphone placed in the listening environment to a calibration component of the renderer and transmitting calibration control signals for acoustic information generated by the microphone to the calibration component. The interconnect is suitable for use in a system for rendering spatial audio content comprising channel-based and object-based audio components.

First claim

What is claimed is:

1. An interconnect for coupling components in an object-based rendering system comprising:
a first network channel configured to couple a renderer to an array of individually addressable drivers projecting sound in a listening environment and configured to transmit audio signals and control data from the renderer to the array; wherein the array of individually addressable audio drivers comprises an upward-firing driver for propagation of sound waves off of a ceiling of the listening environment to simulate the presence of a speaker at the ceiling of the listening environment; wherein the renderer is configured to render an object-based audio signal from a source for playback in the listening environment; wherein the renderer comprises a virtualizer that is configured to derive an audio signal for the upward-firing driver based on spatial reproduction information of the object-based audio signal; and
a second network channel configured to couple a microphone placed in the listening environment to a calibration component of the renderer and configured to transmit calibration control signals for acoustic information generated by the microphone to the calibration component; wherein the calibration component is configured to modify the audio signal for the upward-firing driver based on the acoustic information.

2. The interconnect of claim 1 wherein one or more configuration parameters are stored in a memory associated with the array of individually addressable drivers, and wherein the second network channel transmits configuration information selected from the group consisting of: driver identification, driver location information, driver type, and driver firing direction.

3. The interconnect of claim 1 wherein the first and second network channels embody a bi-directional interconnect supporting a network protocol utilized by the rendering system for transmission of control data among the renderer, calibration component, and the array of individually addressable audio drivers, and wherein each audio driver of the array of audio drivers is uniquely addressable according to the network communication protocol.

4. The interconnect of claim 1 wherein the renderer is configured to render audio streams comprising audio content to a plurality of audio feeds corresponding to the array of uniquely addressable audio drivers in accordance with metadata, wherein the metadata specifies which individual audio stream is transmitted to each respective addressable audio driver.

5. The interconnect of claim 4 wherein the audio content comprises object-based and channel-based audio signals.

6. A system for rendering object-based audio signals in a listening environment, comprising:
an array of individually addressable audio drivers enclosed in one or more speaker enclosures for projection of sound in the listening environment; wherein the array of individually addressable audio drivers comprises an upward-firing driver for propagation of sound waves off of a ceiling of the listening environment to simulate the presence of a speaker at the ceiling of the listening environment;
at least one microphone placed in the listening environment for monitoring an acoustic characteristic of the listening environment;
a renderer configured to render an object-based audio signal from a source for playback in the listening environment; wherein the renderer comprises a virtualizer that is configured to derive an audio signal for the upward-firing driver based on spatial reproduction information of the object-based audio signal; and
a bi-directional interconnect having a first channel coupling the renderer to the array of individually addressable audio drivers for playback of audio signals in the listening environment, and a second channel coupling the at least one microphone to the renderer; wherein the renderer is configured to modify the audio signal for the upward-firing driver based on the acoustic characteristic of the listening environment.

7. The system of claim 6 further comprising a calibration component coupled to the renderer and configured to receive the acoustic characteristic for configuration of the system and modification of the audio signals.

8. The system of claim 7 further comprising a network embodying the bi-directional interconnect and wherein the bi-directional interconnect supports a network protocol utilized by the system for transmission of control data among the renderer, the calibration component, and the array of individually addressable audio drivers.

9. The system of claim 8 wherein each audio driver of the array of audio drivers is uniquely addressable according to the network protocol.

10. The system of claim 9 wherein the renderer is configured to render audio streams comprising audio content to a plurality of audio feeds corresponding to the array of uniquely addressable audio drivers in accordance with metadata, wherein the metadata specifies which individual audio stream is transmitted to each respective addressable audio driver.

11. The system of claim 10 wherein the listening environment comprises an at least partially enclosed area, and further wherein the audio streams comprise audio content selected from the group consisting of: cinema content transformed for playback in a home environment, television content, user generated content, computer game content, and music.

12. The system of claim 11 wherein the at least one audio driver comprises one of: a manually adjustable audio transducer within an enclosure that is adjustable with respect to sound firing angle relative to a floor plane of the enclosed area and an electrically controllable audio transducer within an enclosure that is automatically adjustable with respect to the sound firing angle.

13. The system of claim 11 wherein the audio content comprises object-based and channel-based audio signals.

14. The system of claim 13 wherein at least a portion of the array of individually addressable drivers is configured according to a surround sound definition.

15. A method for rendering audio content in an object-based rendering system comprising a renderer and an array of individually addressable drivers, wherein the audio content comprises an object-based audio signal, wherein the array of individually addressable audio drivers comprises an upward-firing driver for propagation of sound waves off of a ceiling of the listening environment to simulate the presence of a speaker at the ceiling of the listening environment, the method comprising:
deriving an audio signal for the upward-firing driver based on spatial reproduction information of the object-based audio signal using a virtualizer;
transmitting the audio signal and control data for the upward-firing driver from the renderer to the array over a first network channel coupling the renderer to the array for projecting sound in a listening environment;
transmitting sound signals capturing acoustic information of the listening environment from a microphone to a calibration component over a second network channel coupling the microphone to the calibration component; and
using the acoustic information to modify the audio signal and control data for the upward-firing driver sent to the array.

16. The method of claim 15 further comprising assigning to each driver of the array of individually addressable drivers a unique address defined in accordance with a network protocol utilized by the rendering system.

17. The method of claim 15 wherein the calibration component is provided as a component within the renderer and the microphone is tightly coupled to

Assignees

• Dolby Laboratories Licensing Corp

Inventors

• Hooks S Spencer
• Lando Joshua Brandon
• Mehta Sripal S
• Fellers Matthew
• Murrie Stewart
• Basler Brad

Classifications

• H04R1/40 Primary

  by combining a number of identical transducers {(specially adapted for hearing aids H04R25/405)} · CPC title

• H04S7/00

  Indicating arrangements; Control arrangements, e.g. balance control · CPC title

• H04S7/30 Primary

  Control circuits for electronic adaptation of the sound field · CPC title

• H04R1/403 Primary

  loud-speakers · CPC title

• H04S7/301

  Automatic calibration of stereophonic sound system, e.g. with test microphone · CPC title