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US 11,778,382 B2Granted
Audio signal processing apparatus and method
AssigneeAlibaba Group Holding Limited
InventorsJinwei Feng, Xinguo Li, Yang Yang
Life of this patent
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Abstract
An audio signal processing apparatus is provided by the present disclosure, and includes: multiple microphones; and every two of the multiple microphones being arranged in close proximity to each other, and the multiple microphones forming a symmetrical structure.
Claims20
A method implemented by an apparatus, the method comprising:
- performing a linear combination of audio signals obtained by multiple microphones of the apparatus to form a combined audio signal based at least in part on a matrix, matrix elements of the matrix comprising different sine and cosine functions of a beam angle associated with a direction of a desired audio signal and different cosine functions of a null angle associated with a direction of an undesired audio signal;
- and
- dynamically selecting a direction with a highest signal-to-noise ratio as a pickup direction based on the combined audio signal.
One or more computer readable media storing executable instructions that, when executed by one or more processors of an apparatus, causing the one or more processors to perform acts comprising:
- performing a linear combination of audio signals obtained by multiple microphones of the apparatus to form a combined audio signal based at least in part on a matrix, matrix elements of the matrix comprising different sine and cosine functions of a beam angle associated with a direction of a desired audio signal and different cosine functions of a null angle associated with a direction of an undesired audio signal;
- and
- dynamically selecting a direction with a highest signal-to-noise ratio as a pickup direction based on the combined audio signal.
An apparatus comprising:
- multiple microphones forming a symmetrical structure with every two of the multiple microphones being arranged in close proximity to each other;
- one or more processors;
- memory storing executable instructions that, when executed by the one or more processors, cause the one or more processors to perform acts comprising:
- performing a linear combination of audio signals obtained by the multiple microphones to form a combined audio signal based at least in part on a matrix, matrix elements of the matrix comprising different sine and cosine functions of a beam angle associated with a direction of a desired audio signal and different cosine functions of a null angle associated with a direction of an undesired audio signal;
- and
- dynamically selecting a direction with a highest signal-to-noise ratio as a pickup direction based on the combined audio signal.
3 more elements
Dependencies are inferred from the claim text.