Method and system for audio system volume control

Patent metadata

Field	Value
Publication number	US-9154596-B2
Application number	US-54875809-A
Country	US
Kind code	B2
Filing date	Aug 27, 2009
Priority date	Jul 24, 2009
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

A communication device may determine total gain for a downlink processing path via the communication device. The total gain may be determined based on determination of audio requirements for each of a plurality of audio processing devices supported via the communication device, during the downlink processing path. The communication device is operable to determine a default mix signal gain, a downlink gain adjustment and a calibration gain based on the determined audio requirements, and to calculate the total gain for the downlink processing path based on the determined default mix signal gain, the downlink gain adjustment and the calibration gain. The determination of the total gain may be based on determination of a telephony state in the communication device. The calibration gain may be determined during calibration of the communication device, whereas the downlink gain adjustment may be calculated based on an adjustment step-size and/or a mode based gain index.

First claim

What is claimed is:

1. A method for audio processing, using a processor or circuit within a communication device, comprising:
determining, for a combined output audio signal that includes a plurality of component audio signals, again component audio signals;
determining a total gain of the combined output audio signal as a sum of the determined gains of the plurality of component audio signals in response to detecting an off-hook state of the communication device;
comparing the total gain to a predefined saturation threshold;
implementing a volume control algorithm to limit the total gain when the total gain exceeds the predefined saturation threshold, the volume control algorithm comprising:
determining audio requirements for each of a plurality of audio processing devices in a downlink processing path of the communication device;
determining a default mix signal gain, a downlink gain adjustment, and a calibration gain based on the determined audio requirements; and
calculating a mixed gain for the downlink processing path based on the determined default mix signal gain, the downlink gain adjustment and the calibration gain; and

adjusting the total gain based on the mixed gain.

2. The method according to claim 1 , wherein the downlink processing path handles communication of the plurality of component audio signals corresponding to a downlink voice call audio stream, ring tones, music, or dual-tone multi-frequency (DTMF) based audio playback.

3. The method according to claim 1 , comprising acquiring the location of the communication device from a global navigation system satellite (GNSS) receiver communicatively coupled to the communication device.

4. The method according to claim 1 , wherein values for the calibration gain are determined during calibration of the communication device.

5. The method according to claim 1 , wherein the downlink gain adjustment is calculated based on an adjustment step-size or a mode based gain index.

6. The method according to claim 1 , further comprising applying a default signal gain to each of the plurality of component audio signals in the downlink path of the communication device in response to detecting an on-hook state of the communication device.

7. The method according to claim 1 , wherein the total gain is adjusted by adjusting corresponding gains of the plurality of component audio signals.

8. The method according to claim 5 , comprising determining the adjustment step-size based on user input.

9. The method according to claim 5 , comprising selecting the signal gain index from a plurality of predetermined signal gain indexes.

10. The method according to claim 9 , wherein each of the plurality of predetermined signal gain indexes corresponds to an audio play combination, the audio play combination comprising audio signals from at least one source in the communication device.

11. The method according to claim 9 , comprising storing the plurality of predetermined signal gain indexes in at least one look-up table in a memory of the communication device.

12. A system for audio processing, comprising:
one or more processors and/or circuits within a communication device configured to:
determine, for a combined output audio signal that includes a plurality of component audio signals, a gain for each of the plurality of component audio signals;
determine a total gain of the combined output audio signal as a sum of the determined gains of the plurality of component audio signals in response to detecting an off-hook state of the communication device;
compare the total gain to a predefined saturation threshold;
implement a volume control algorithm when the total gain exceeds the predefined saturation threshold, the volume control algorithm comprising:
determining audio requirements for each of a plurality of audio processing devices in a downlink processing path of the communication device;
determining a default mix signal gain, a downlink gain adjustment and a calibration gain based on the determined audio requirements; and
calculating a mixed gain for the downlink processing path based on the determined default mix signal gain, the downlink gain adjustment and the calibration gain; and

adjust the total gain based on the mixed gain.

13. The system according to claim 12 , wherein the downlink processing path handles communication of the plurality of component audio signals corresponding to a downlink voice call audio stream, ring tones, music, or dual-tone multi-frequency (DTMF) based audio playback.

14. The system according to claim 12 , wherein the one or more processors and/or circuits is configured to determine values for the calibration gain during calibration of the communication device.

15. The system according to claim 12 , wherein the one or more processors and/or circuits is configured to calculate the downlink gain adjustment based on an adjustment step-size or a signal mode based gain index.

16. The system according to claim 15 , wherein the one or more processors and/or circuits is configured to determine the adjustment step-size based on user input.

17. The system according to claim 15 , wherein the one or more processors and/or circuits is configured to select the signal mode based gain index from a plurality of predetermined signal mode based gain indexes.

18. The system according to claim 17 , wherein each of the plurality of predetermined signal mode based gain indexes corresponds to an audio play combination, the audio play combination comprising audio signals from at least one source in the communication device.

19. The system according to claim 17 , wherein the plurality of predetermined signal mode based gain indexes are stored in at least one look-up table in a memory of the communication device.

20. A communication device, comprising one or more processors and/or circuits configured to:
generate a combined audio output signal having a plurality of component audio signals;
determine a gain for each of the plurality of component audio signals;
determine whether the communication device is in an on-hook or an off-hook state;
in response to determining that the communication device is in the off-hook state,
calculate a total gain of the combined audio output signal as a sum of the determined gains of the plurality of component audio signals;

apply a first gain to the combined audio output signal in response to determining that the communication device is in the on-hook state; and
apply a second gain to the combined audio output signal in response to determining that the communication device is in the off-hook state.

21. The communication device of claim 20 , wherein the one or more processors and/or circuits are further configured to:
in response to determining that the communication device is in the off-hook state,
compare the total gain to a predetermined saturation threshold;
calculate a controlled gain in response to the total gain exceeding the predetermined saturation threshold; and
modify the total gain based on the controlled gain in response to the total gain exceeding the predetermined saturation threshold.

Assignees

• Khanduri Prakash
• Broadcom Corp

Inventors

• Khanduri Prakash

Classifications

• H04M1/6016 Primary

  in the receiver circuit · CPC title