Ambient audio event detection in a personal audio device headset

• US 8,804,974 B1
• Filed: 02/07/2011
• Issued: 08/12/2014
• Est. Priority Date: 03/03/2006
• Status: Active Grant

• Current Assignee: Cirrus Logic Incorporated
• Original Assignee: Cirrus Logic Incorporated
• Inventors: Melanson, John L.
• Primary Examiner(s): Chin, Vivian
• Assistant Examiner(s): FAHNERT, FRIEDRICH
• Application Number:
  US13/022,019
• Time in Patent Office: 1,282 Days
• Field of Search: 381/57, 381/74, 381/106, 381/103, 381/108, 375/260, 375/346, 455/186.1, 455/343, 455/550.1, 367/136, 725/47, 345/619, 704231-257, 379 8801- 8804
• US Class Current: 381/57
• CPC Class Codes: G10L 15/20 Speech recognition techniques specially adapted for robustness in adverse environments, e.g. in noise, of stress induced speech G10L21/02 takes precedence
• CPC Class Codes: H03G 3/32 the control being dependent upon ambient noise level or sound level
• CPC Class Codes: H03G 9/005 of digital or coded signals
• CPC Class Codes: H03G 9/025 frequency-dependent volume compression or expansion, e.g. multiple-band systems H03G9/10, H03G9/18 take precedence

Abstract

Ambient audio event detection in a personal audio device headset provides for directive response to external audible events. Depending on the type of event, an alert may be issued, speech may be communicated to another device, program material may be interrupted and/or resumed with or without repositioning, and program material may be modified or selected for compatibility with, or to overcome, the ambient environment indicated by the detected event.

Claims

1. A headphone unit for portable consumer audio playback device use, the headphone unit comprising:

an audio program source for providing audio program information;

an audio output transducer for generating an acoustic output from an audio output signal containing the audio program information;

a microphone for sensing ambient sounds external to the headphone unit and producing an ambient measuring audio signal;

an audio processor that detects an event in the ambient sounds from the ambient measuring audio signal, determines a characteristic of the event, and in response, selects a type of program material provided from the audio program source for compatibility with the event to generate the audio output signal, wherein the audio processor selects the type of the program material for acoustic compatibility with the ambient sounds corresponding to the event to set a mood or more effectively mask the ambient sounds corresponding to the event; and

a battery for supplying power to the audio processor.

2. The headphone unit of claim 1, wherein the audio processor, responsive to detecting the event, pauses playback of the audio program information and resumes playback of the audio program information after the detecting of the event has ended.

3. The headphone unit of claim 1, further comprising a wireless receiver for receiving the audio program information from an external device containing a program source.

4. The headphone unit of claim 1, wherein the audio processor further distinguishes a characteristic of the event as a sound to which a wearer of the headphone unit should be alerted, and wherein the audio processor delivers the ambient sounds to the audio output signal and attenuates the audio program information while the event is present.

5. The headphone unit of claim 4, wherein the processor distinguishes the event as speech when the audio processor is in a mode selected as a social mode, whereby conversations can be conducted with a wearer of the headphone unit.

6. The headphone unit of claim 4, wherein the audio processor distinguishes the event as a hazard indication when the processor is in a mode selected as a personal safety social mode, whereby a wearer of the headphone unit is alerted to the hazard indication.

7. The headphone unit of claim 1, further comprising a transceiver for communicating with another audio reproduction device equipped with a receiver, wherein the audio processor distinguishes the event as speech of a wearer of the headphone unit, and wherein the audio processor delivers the ambient measuring audio signal to the transceiver for transmission to the other audio reproduction device in response to the audio processor distinguishing the event as speech, when the audio processor is in a mode selected as a linked chat mode.

8. The headphone unit of claim 1, further comprising at least one other microphone, wherein the audio processor further detects a directionality of the event and wherein the altering of the program information is further qualified by the detected directionality.

9. A method of processing audio program information in a headphone unit, the method comprising:

providing an audio program source within the headphone unit for generating the audio program information;

within the headphone unit, generating an acoustic output from an audio output signal containing the audio program information;

sensing ambient sounds external to the headphone unit producing an ambient measuring audio signal;

within the headphone unit, detecting an event in the ambient sounds from the ambient measuring audio signal;

responsive to detecting the event, determining a characteristic of the event; and

within the headphone unit, responsive to determining the characteristic of the event, selecting a type of program material for compatibility with the event as the audio program information used to generate the audio output signal, wherein the selecting selects the type of the program material for acoustic compatibility with the ambient sounds corresponding to the event to set a mood or more effectively mask the ambient sounds corresponding to the event.

10. The method of claim 9, further comprising:

responsive to detecting the event, pausing playback of the audio program information; and

resuming playback of the audio program information after the detecting of the event has ended.

11. The method of claim 9, further comprising receiving the audio program information from an external device containing a program source via a wireless link.

12. The method of claim 9, further comprising:

distinguishing a characteristic of the event as a sound to which a wearer of the headphone unit should be alerted; and

delivering the ambient sounds to the audio output signal and attenuating the audio program information while the event is present.

13. The method of claim 12, wherein the distinguishing distinguishes the event as speech when the audio processor is in a mode selected as a social mode, whereby conversations can be conducted with a wearer of the headphone unit.

14. The method of claim 12, wherein the distinguishing distinguishes the event as a hazard indication when the processor is in a mode selected as a personal safety social mode, whereby a wearer of the headphone unit is alerted to the hazard indication.

15. The method of claim 9, further comprising:

communicating with another audio reproduction device equipped with a receiver;

distinguishing the event as speech of a wearer of the headphone unit; and

delivering the ambient measuring audio signal to the transceiver for transmission to the other audio reproduction device in response to distinguishing the vent as speech, when the audio processor is in a mode selected as a linked chat mode.

16. The method of claim 9, further comprising detecting a directionality of the event, and wherein the altering of the program information is further qualified by the detected directionality.