Volume control

• US 9,755,605 B1
• Filed: 09/19/2013
• Issued: 09/05/2017
• Est. Priority Date: 09/19/2013
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Li, Meng, Charton, Arnaud Jean-Louis, Loo, Catherine Michelle
• Primary Examiner(s): Elahee, Md S
• Application Number:
  US14/032,081
• Time in Patent Office: 1,447 Days
• Field of Search: 381 99, 381104, 381107, 381 28, 381 711, 3403923, 84737, 703 6, 375332
• CPC Class Codes: H03G 3/02 Manually-operated control H03G3/001 and H03G3/002 take precedence
• CPC Class Codes: H03G 3/3005 in amplifiers suitable for low-frequencies, e.g. audio amplifiers H03G3/32, H03G3/34 take precedence
• CPC Class Codes: H03G 3/32 the control being dependent upon ambient noise level or sound level

Abstract

This disclosure generally pertains to volume control of audio output by a device. A piecewise curve may be used to implement volume control using two or more curves segments. The piecewise curve may be implemented by a signal converter. The curve segments may be selected to provide volume control that provides incremental changes in amplification at mid-level to high level volumes, while providing anticipated amplification at lower volumes which satisfy users'"'"' expectations. In some instances, different piecewise curves may be selected for different types of audio so that these different types of audio are provided to users at an expected volume and/or in a meaningful way. When multiple audio outputs occur at a same time, the piecewise curves associated with some of the audio outputs may be dynamically adjusted or updated based on the presence of the other ones of the multiple audio outputs and/or ambient noise.

Claims

1. An audio device comprising:

memory;

one or more processors; and

one or more computer-executable instructions stored in the memory and executable by the one or more processors to;

associate audio input signals derived from audio data with at least a first function, the first function including at least a second function and a third function joined by a common data point to form the first function, the first function including a contiguous dataset associated with a given noise floor, the contiguous dataset to create audio output signals having different amplification associated with the given noise floor than the audio input signals, wherein the first function includes, for a given input value, at most one output value;

receive a volume control setting; and

convert the audio input signals into the audio output signals using the first function including the contiguous dataset and the volume control setting.

2. The audio device as recited in claim 1, the one or more computer-executable instructions further executable by the one or more processors to convert the audio input signals into the audio output signals using at least one of:

a digital-to-analog converter that uses the contiguous dataset to convert the audio input signals that are digital input signals into the audio output signals that are analog output signals, or

a digital-to-digital converter that uses the contiguous dataset to convert the audio input signals into the audio output signals.

3. The audio device as recited in claim 1, the one or more computer-executable instructions further executable by the one or more processors to determine the noise floor as an average of ambient noise over a given time period.

4. The audio device as recited in claim 1, wherein the common data point is associated with a reference volume setting that is an initial volume, the one or more computer-executable instructions further executable by the one or more processors to create the contiguous dataset at least in part by determining a location of the common data point.

5. The audio device as recited in claim 4, the one or more computer-executable instructions further executable by the one or more processors to modify the contiguous dataset at least in part by determining a new location of the common data point.

6. The audio device as recited in claim 1, wherein the audio data includes first audio data associated with first audio input signals and second audio data associated with second audio input signals, the first audio input signals being from a different audio source than the second audio input signals, the one or more computer-executable instructions further executable by the one or more processors to associate the first audio data with a first contiguous dataset and associate the second audio data with a second contiguous dataset that is different than the first contiguous dataset.

7. The audio device as recited in claim 6, the one or more computer-executable instructions further executable by the one or more processors to dynamically associate a third, different, contiguous dataset to at least one of the first audio data or the second audio data in response to the first audio data being output at a same time or near a same time as the second audio data.

8. The audio device as recited in claim 1, wherein the noise floor includes a cumulative level of ambient noise associated with a given time period, and further comprising at least one microphone to generate audio signals to measure the ambient noise, the one or more computer-executable instructions further executable by the one or more processors to select the at least the second function and the third function based at least in part on the ambient noise.

9. The audio device as recited in claim 1, the one or more computer-executable instructions further executable by the one or more processors to receive the volume control setting via a potentiometer and at least one of a voice command or a user selection from a graphical user interface.

10. A device comprising:

memory;

one or more processors; and

one or more computer-executable instructions stored in the memory and executable by the one or more processors to;

receive a volume control setting;

convert audio input signals into audio output signals using a contiguous dataset and the volume control setting, wherein converting the audio input signals into the audio output signals causes the audio output signals to have a different amplification than the audio input signals for a given noise floor; and

determine at least a first function and a second function that are joined by a common data point to form a third function, the third function including the contiguous dataset for the given noise floor.

11. The device as recited in claim 10, the one or more computer-executable instructions further executable by the one or more processors to dynamically adjust or replace one or both of the first function or the second function based at least in part on detection of another audio source.

12. The device as recited in claim 10, wherein the noise floor includes ambient noise associated with a given time period, the one or more computer-executable instructions further executable by the one or more processors to:

measure a change in the ambient noise in an environment; and

dynamically adjust or replace one or both of the first function or the second function based at least in part on the change in the ambient noise in the environment.

13. The device as recited in claim 10, further comprising a digital-to-digital converter that converts the audio input signals as digital input signals into the audio output signals as digital output signals.

14. The device as recited in claim 10, wherein the common data point is a first common data point, the one or more computer-executable instructions further executable by the one or more processors to associate a fourth function with a volume upper setting, the third function including at least a portion of the fourth function, and the fourth function joined with the second function at a second common data point to form the contiguous dataset.

15. The device as recited in claim 10, further comprising receiving the audio input signals from another device.

16. A method comprising:

receiving audio input signals derived from audio data;

associating audio input signals with at least a first function, the first function including at least a second function and a third function joined at a common data point to form the first function, the first function including a contiguous dataset for a given noise floor;

generating, using the contiguous dataset, audio output signals having different amplification with the given noise floor than the audio input signals;

receiving a volume control setting; and

converting the audio input signals into the audio output signals using the first function including the contiguous dataset and the volume control setting.

17. The method as recited in claim 16, further comprising determining the common data point based at least in part on a reference volume setting that is an initial volume.

18. The method as recited in claim 16, wherein the given noise floor includes a cumulative level of ambient noise associated with a given time period, and further comprising determining the ambient noise, the method further comprising selecting the at least the second function and the third function based at least in part on the ambient noise.

19. The method as recited in claim 16, further comprising selecting the at least the second function and the third function from at least one of linear functions or non-linear functions.

20. The method as recited in claim 16, further comprising causing output of the audio output signals.

21. The method as recited in claim 16, wherein the converting the audio input signals into the audio output signals further comprises using a digital-to-analog converter that uses the contiguous dataset to convert the audio input signals that are digital input signals into the audio output signals that are analog output signals.