Method, system and computer storage medium for detecting an audio input interface

Patent metadata

Field	Value
Publication number	US-9886238-B2
Application number	US-201514683103-A
Country	US
Kind code	B2
Filing date	Apr 9, 2015
Priority date	May 27, 2013
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

Provided is a method for detecting an audio input interface, comprising: acquiring input signals of every one of audio input interfaces; acquiring energy values of said input signals of every one of said audio input interfaces, and acquiring an interface identification of the audio input interface of which the energy value is the maximum among the energy values; adding said interface identification acquired herein into an identification sequence in an order by acquiring time; and identifying the audio input interface, of which the interface identification is saved most often in said identification sequence, as a valid audio input interface. Also provided is a system for detecting an audio input interface. The present disclosure is capable of effectively identifying the audio input interface connected to the microphone that the user is using, so that the user does not need to switch manually.

First claim

What is claimed is:

1. A method for detecting an audio input interface by performing an iterative process, the iterative process comprising the steps of:
(a) acquiring input signals of a plurality of audio input interfaces;
(b) acquiring energy values of said input signals of the plurality of audio input interfaces; and
(c) judging whether a maximum energy value among the energy values of said input signals is no less than a preset energy value,
wherein when said judging judges that said maximum energy value among the energy values of said input signals is no less than the preset energy value,
acquiring an interface identification of the audio input interface of which the energy value is the maximum among the energy values,
adding said interface identification acquired herein into an identification sequence in an order by acquiring time, and
identifying the audio input interface, of which the interface identification is saved most often in said identification sequence, as a valid audio input interface; and

when said judging judges that said maximum energy value among the energy values of said input signals is less than the preset energy value,
judging said input signals of the plurality of audio input interfaces as all invalid, and
returning to the step of (a).

2. The method for detecting an audio input interface according to claim 1 , wherein the iterative process further comprises the steps of:
when a quantity of interface identifications saved in said identification sequence reaches a preset quantity, whenever a new interface identification is added, one saved interface identification of which the acquiring time is the earliest will be discarded.

3. The method for detecting an audio input interface according to claim 1 , wherein, after said acquiring input signals of the plurality of audio input interfaces, the iterative process further comprises the steps of:
executing Voice Activity Detection on said input signals of the plurality of audio input interfaces;
when all results of said Voice Activity Detection on the plurality of audio input interfaces are zero,
judging said input signals of the plurality of audio input interfaces as all invalid, and
re-acquiring input signals of the plurality of input interfaces; and

when at least one of the results of said Voice Activity Detection of the plurality of audio input interfaces is one,
judging said input signals of the plurality of audio input interfaces as valid,
acquiring energy values of said input signals of the plurality of said audio input interfaces, and
acquiring an interface identification of the audio input interface of which the energy value is the maximum among the energy values.

4. The method for detecting an audio input interface according to claim 1 , wherein, after said acquiring input signals of the plurality of audio input interfaces, the iterative process further comprises the steps of:
acquiring signal-noise ratios of said input signals of the plurality of audio input interfaces;
when each of said signal-noise ratios of said input signals is less than a preset value of signal-noise ratio,
judging said input signals of the plurality of audio input interfaces as invalid, and
re-acquiring input signals of the plurality of audio input interfaces; and

when at least one of said signal-noise ratios of each of said input signals is no less than said preset value of signal-noise ratio,
judging every one of said input signals as valid,
acquiring energy values of said input signals of the plurality of audio input interfaces, and
acquiring an interface identification of the audio input interface of which the energy value is the maximum among the energy values.

5. The method for detecting an audio input interface according to claim 1 , wherein, said acquiring input signals of the plurality of audio input interfaces comprises following sub-steps:
simultaneously collecting input signals of the plurality of audio input interfaces, and encapsulating said input signals of the plurality of audio input interfaces collected at the same time into a frame of detection data;
de-interleaving each of frames of said detection data so as to acquire said input signals of the plurality of audio input interfaces.

6. The method for detecting an audio input interface according to claim 5 , wherein, said de-interleaving each of frames of said detection data comprises the following sub-steps:
saving each of frames of said detection data;
extracting one of said frames of detection data every preset frames, and then de-interleaving said frame extracted herein.

7. A system for detecting an audio input interface, comprising:
an input detecting module, configured to perform step (a) of acquiring input signals of a plurality of audio input interfaces;
an energy detecting module, configured to perform step (b) of acquiring energy values of said input signals of the plurality of audio input interfaces;
an interface identification acquiring module and an identifying module configured to perform step (c) of judging whether said maximum energy value among the energy values of said input signals is no less than a preset energy value,
wherein when said judging of the interface identification acquiring module judges that said maximum energy value among the energy values of said input signals is no less than a preset energy value,
the energy detecting module acquires an interface identification of the audio input interface of which the energy value is the maximum among the energy values,
the interface identification acquiring module adds said interface identification acquired herein into an identification sequence in an order by acquiring time, and
the identifying module identifies the audio input interface, of which the interface identification is saved most often in said identification sequence, as a valid audio input interface; and

when said judging of the interface identification acquiring module judges said maximum energy value among the energy values of said input signals is less than the preset energy value,
judging said input signals of the plurality of audio input interfaces as all invalid, and
returning to the input detecting module to perform step (a) so as to perform an iterative process of steps (a), (b), and (c).

8. The system for detecting an audio input interface according to claim 7 , wherein, the interface identification acquiring module is configured to discard one saved interface identification of which the acquiring time is the earliest whenever a new interface identification is added, if a quantity of interface identifications saved in said identification sequence reaches a preset quantity.

9. The system for detecting an audio input interface according to claim 7 , further comprising:
a Voice Activity Detecting module, configured to execute Voice Activity Detection on said input signals of the plurality of audio input interfaces;
when all results of said Voice Activity Detection on the plurality of audio input interfaces are zero, the system
judges said input signals of the plurality of audio input interfaces as all invalid, and
re-acquires input signals of the plurality of input interfaces; and

when at least one of the results of said Voice Activity Detection on the plurality of audio input interfaces is one,
the system judges said input signals of the plurality of audio input interfaces as valid,
the energy detecting module acquires energy values of said input signals of the plurality of audio input interfaces, and
acquires an interface identification of the audio input interface of which the energy value is the maximum among the energy values.

10. The system for detecting an audio input interfa

Assignees

• Tencent Tech Shenzhen Co Ltd

Inventors

• Liu Hong
• Peng Yuanjiang
• Long Xingping
• Peng Chao

Classifications

• H04R27/00

  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

• H04M3/569

  using the instant speaker's algorithm (speech detection per se G10L25/78) · CPC title

• H04R3/005 Primary

  for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407) · CPC title

• H04M3/568

  audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants (echo suppression in two-way loud-speaking telephone systems H04M9/02; sound field processing per se H04S7/30) · CPC title

• G10L2025/783

  based on threshold decision · CPC title