System and method for analyzing audio information to determine pitch and/or fractional chirp rate

A technology of audio information and linear frequency modulation, applied in speech analysis, instruments, measuring devices, etc., can solve problems such as small effect of pitch, decrease of accuracy and/or precision, and large noise of audio signal

Inactive Publication Date: 2014-07-30
弩锋股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accuracy and/or precision of conventional techniques can drop significantly under "noisy" conditions (eg, acoustic noise or process noise)
Since

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  • System and method for analyzing audio information to determine pitch and/or fractional chirp rate
  • System and method for analyzing audio information to determine pitch and/or fractional chirp rate
  • System and method for analyzing audio information to determine pitch and/or fractional chirp rate

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Embodiment Construction

[0020] figure 1 A system 10 for analyzing audio information is shown. System 10 may be used to determine, for an audio signal, an estimated pitch of a sound represented in the audio signal, an estimated chirp slope (or fractional chirp slope) of a sound represented in the audio signal, and / or a pitch of the sound represented in the audio signal. Other parameters of the sound. System 10 may be used to provide a measure related to the likelihood that a sound represented in an audio signal has a pitch and / or a chirp (or a fractional chirp) using statistical analysis. System 10 may be implemented in an overall system (not shown) for processing audio signals. For example, the overall system can be used to segment sounds represented in an audio signal (e.g., divide sounds in an audio signal into groups corresponding to different sound sources, such as human speech), classify sounds (eg, assign sounds to specific sound sources, eg, specific human speech), reconstruct sounds repres...

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PUM

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Abstract

The invention discloses a system and a method configured to analyze audio information. The system and method may include determining for an audio signal, an estimated pitch of a sound represented in the audio signal, an estimated chirp rate (or fractional chirp rate) of a sound represented in the audio signal, and/or other parameters of sound(s) represented in the audio signal. The one or more parameters may be determined through analysis of transformed audio information derived from the audio signal {e.g., through Fourier Transform, Fast Fourier Transform, Short Time Fourier Transform, Spectral Motion Transform, and/or other transforms). Statistical analysis may be implemented to determine metrics related to the likelihood that a sound represented in the audio signal has a pitch and/or chirp rate (or fractional chirp rate). Such metrics may be implemented to determine an estimated pitch and/or fractional chirp rate.

Description

[0001] Cross References to Related Applications [0002] This application claims the title "SYSTEM AND METHOD FOR ANALYZING AUDIO INFORMANDION TO DETERMINE PITCH AND / OR FRACTIONAL CHIRP RATE), which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to analyzing audio information by determining a pitch likelihood measure and a pitch likelihood measure from a transformation of the audio information during a time sampling window to determine the pitch and / or fractional chirp of the sound of the audio information within the time sampling window Slope (fractional chirp rate). Background technique [0004] Systems and methods for analyzing transformed audio information to detect the pitch of sounds represented in the transformed audio information are known. In general, these techniques focus on analyzing transformed audio information or further transformations (e.g., cepstrum) of previously transformed audio information, ...

Claims

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Application Information

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IPC IPC(8): G01L19/00
CPCG10L25/90
Inventor 大卫·C·布兰得利尼古拉斯·K·费舍尔罗伯特·N·希尔顿罗德尼·加托德里克·R·鲁斯
Owner 弩锋股份有限公司
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