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Method, apparatus and machine-readable storage medium for decomposing a multichannel audio signal

An audio signal, multi-channel technology, applied in the direction of instruments, voice analysis, etc.

Inactive Publication Date: 2013-07-03
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These constraints can limit the ability to control interference and / or record spatial effects in the case of music production, and can lead to a restricted user experience in the case of video games

Method used

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  • Method, apparatus and machine-readable storage medium for decomposing a multichannel audio signal
  • Method, apparatus and machine-readable storage medium for decomposing a multichannel audio signal
  • Method, apparatus and machine-readable storage medium for decomposing a multichannel audio signal

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Embodiment Construction

[0053] Decomposing an audio signal using a basis function inventory and sparse restoration techniques is disclosed, wherein the basis function inventory contains information about spectral changes of notes during indecision of pitch. Such decomposition can be used to support analysis, encoding, rendering and / or synthesis of signals. Examples of quantitative analysis of audio signals containing a mixture of sounds from harmonic (ie, non-percussion) and percussion instruments are presented herein.

[0054] Unless expressly limited by its context, the term "signal" is used herein to indicate any of its ordinary meanings, including the state of a memory location (or collection of memory locations) expressed on a wire, bus, or other transmission medium. Unless expressly limited by its context, the term "generate" is used herein to indicate any of its ordinary meanings, such as computational or otherwise. Unless expressly limited by its context, the term "calculate" is used herein to...

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Abstract

Decomposition of a multichannel signal using direction-of-arrival estimation, a basis function inventory, and a sparse recovery technique is disclosed.

Description

[0001] Claims of Priority Pursuant to 35 U.S.C. §119 [0002] This patent application claims priority over Provisional Application No. 61 / 406,561, filed October 25, 2010, entitled "MULTI-MICROPHONE SPARSITY-BASED MUSIC SCENE ANALYSIS" The said application is assigned to the present assignee. technical field [0003] The present invention relates to audio signal processing. Background technique [0004] Many music applications on portable devices (eg, smartphones, netbooks, laptops, tablets) or electronic game consoles are available to a single user. In these cases, the user of the device hums a melody, sings a song, or plays an instrument while the device records the resulting audio signal. The recorded signal can then be analyzed for its pitch / pitch curve by the application, and the user can choose to process operations such as correcting or otherwise altering the pitch curve, upmixing the signal with a different pitch or instrument timbre (upmix) etc. Examples of such...

Claims

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Application Information

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IPC IPC(8): G10L19/008G10L21/0272
CPCG10L19/008G10L21/0272G10L19/00G10L21/02G10L19/0204
Inventor 埃里克·维瑟金莱轩申钟元
Owner QUALCOMM INC