Audio signal adjustment for mobile phone based public addressing system

Patent metadata

Field	Value
Publication number	US-9392386-B2
Application number	US-201414213445-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 14, 2014
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

Systems are described for managing audio in a public addressing (PA) system, the system comprising a host configured to generate an adjustment request; and a client configured to establish a session with a personal communication device (PCD); receive a first audio sample from the PCD; transmit the first audio sample to the PA system; receive the adjustment request from the host; receive a second audio sample from the PCD; and adjust the second audio sample in response to the adjustment request.

First claim

What is claimed is:

1. A system for managing audio for a public addressing (PA) system, comprising:
a client, the client configured to
establish a session with a personal communication device (PCD);
receive a first audio sample from the PCD;
transmit the first audio sample to the PA system;
receive the adjustment request from a host;
receive a second audio sample from the PCD; and
adjust the second audio sample to suppress feedback, in response to the adjustment request.

2. The system of claim 1 , wherein the host is configured to generate the adjustment request in response to detecting a triggering event.

3. The system of claim 2 , wherein the triggering event is an input received at the host.

4. The system of claim 1 , wherein:
the second audio sample has an amplitude and a frequency range; and
adjusting the second audio sample comprises at least one of the following:
scaling the amplitude of the second audio sample;
changing at least one directionality of a microphone of the PCD; and
filtering out the frequency range of the second audio sample.

5. The system of claim 1 , wherein adjusting the second audio sample comprises:
providing the PCD with the adjustment request; and
receiving at least one adjusted second audio sample from the PCD.

6. The system of claim 1 , wherein:
the second audio sample has an amplitude and a frequency range; and
the feedback for the PA system is suppressed by
scaling the amplitude of the second audio sample;
changing at least one directionality of a microphone of the PCD; and
filtering out the frequency range of the second audio sample.

7. The system of claim 1 , wherein the client receives the adjustment request from the host via a network.

8. A method of adjusting audio signals to suppress feedback for a public addressing (PA) system, the method comprising:
establishing, by a client, a session with a source device;
receiving, by a client, a first audio sample from the source device;
transmitting, by a client, the first audio sample to the PA system;
receiving, by a client, an adjustment request from a host;
receiving, by a client, a second audio sample from the source device; and
adjusting, by a client, the second audio sample in response to the adjustment request.

9. The method of claim 8 , wherein the source device comprises a personal communication device (PCD).

10. The method of claim 8 , wherein:
the second audio sample has an amplitude and a frequency range; and
adjusting the second audio sample comprises at least one of the following:
scaling the amplitude of the second audio sample;
changing at least one directionality of a microphone of the PCD; and
filtering out the frequency range of the second audio sample.

11. A method of managing audio signals for a public addressing (PA) system implementing a personal communication device (PCD), the method comprising:
establishing, by the PCD, a session with a client;
receiving, by the PCD, a first audio sample from a user of the PCD;
transmitting, by the PCD, the first audio sample to the client;
receiving, by the PCD, an adjustment request;
receiving, by the PCD based on the adjustment request to suppress feedback, a second audio sample from the user; and
transmitting, by the PCD, the second audio sample to the client.

12. The method of claim 11 , wherein the receiving, based on the adjustment request, comprises:
configuring at least one microphone of the PCD based on the adjustment request; and
receiving the second audio sample via the configured microphone.

13. The method of claim 12 , wherein the receiving, based on the adjustment request, further comprises:
receiving the second audio sample; and
adjusting the second audio sample based on the adjustment request.

14. The method of claim 11 , wherein the receiving, based on the adjustment request, comprises receiving the second audio sample and adjusting the second audio sample.

15. The method of claim 11 , wherein the receiving, based on the adjustment request, a second audio sample from the user, comprises
scaling amplitude of the second audio sample
changing at least one directionality of a microphone; and
filtering out at least one frequency range of the second audio sample.

16. The method of claim 11 , wherein the adjustment request is received from the client or a host associated with the client.

17. The method of claim 11 , wherein the adjustment request is received in response to a feedback signal.

18. The method of claim 17 , wherein the feedback signal is detected by the PCD automatically.

19. The method of claim 18 , wherein the PCD is configured to determine whether the first audio sample exceeds a predetermined threshold, and the feedback signal is detected when the first audio sample exceeds the predetermined threshold.

20. The method of claim 17 , wherein the feedback signal is detected by the client automatically.

21. The method of claim 20 , wherein the client is configured to determine whether the first audio sample exceeds a predetermined threshold, and the feedback signal is detected when the first audio sample exceeds the predetermined threshold.

Assignees

• Qualcomm Inc

Inventors

• Sheth Soham Vikrambhai
• Soliman Samir Salib
• Mahendran Arungundram Chandrasekaran

Classifications

• H04R2420/07

  Applications of wireless loudspeakers or wireless microphones · CPC title

• H04R3/02

  for preventing acoustic reaction {, i.e. acoustic oscillatory feedback (specially adapted for hearing aids H04R25/453)} · CPC title

• H04R27/00 Primary

  Public address systems (circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; {monitoring or testing arrangements for public address systems H04R29/007}; amplifiers H03F) · CPC title

• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title