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A real-time audio signal consistency comparison detection method

An audio signal and detection method technology, applied in speech analysis, instruments, etc., can solve the problems of easy misjudgment and low signal-to-noise ratio of contrast signals, and achieve the effect of high accuracy, fast speed and small amount of calculation.

Active Publication Date: 2022-04-08
杭州联汇科技股份有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the technical problem existing in the prior art that misjudgment is likely to occur when the signal-to-noise ratio of the comparison signal is low, and provides a real-time audio signal consistency comparison detection method that can perform comparison detection on signals with a lower signal-to-noise ratio

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  • A real-time audio signal consistency comparison detection method
  • A real-time audio signal consistency comparison detection method
  • A real-time audio signal consistency comparison detection method

Examples

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Embodiment

[0040] Embodiment: a kind of real-time audio signal consistency contrast detection method of this embodiment, such as figure 1 shown, including the following steps:

[0041] S01. Preprocessing the source audio signal and the comparison audio signal;

[0042] S02. Perform fingerprint extraction on the preprocessed source audio signal and the comparison audio signal;

[0043] S03. Calculate the consistency between the source audio signal and the comparison audio signal according to the extracted fingerprint.

[0044] The preprocessing process in step S01 is as follows:

[0045] S101. Determine whether the incoming signal is a digital signal or an analog signal, if it is a digital signal, enter step S103, and if it is an analog signal, enter step S102;

[0046] S102, converting the analog signal into a digital signal, outputting the PCM data whose sampling rate, bit depth and number of channels are standard values, and entering step S105;

[0047] S103, judging whether the di...

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Abstract

The invention discloses a real-time audio signal consistency comparison detection method, which includes the following steps: S01, preprocessing the source audio signal and the comparison audio signal; S02, performing fingerprinting on the preprocessed source audio signal and the comparison audio signal Extraction; S03. Calculate the consistency between the source audio signal and the comparison audio signal according to the extracted fingerprint. This solution calculates fingerprint features based on the time difference between peaks, and can perform comparative detection on signals with lower signal-to-noise ratios, and is suitable for radio, television and other audio signal comparison environments.

Description

technical field [0001] The invention relates to the technical field of audio signal analysis, in particular to a real-time audio signal consistency comparison detection method. Background technique [0002] Broadcasting stations often need to compare two audio signals to check whether the playback is normal, one of which is the source signal, and the other is an audio signal such as air reception or network, which is recorded as a comparison signal. In the comparison and analysis process of the previous audio signal comparison system, when the signal-to-noise ratio (SNR) of the comparison signal is not high, there will be a high probability of misjudgment, which will reduce the usability of the system. Contents of the invention [0003] The present invention mainly solves the technical problem existing in the prior art that misjudgment is likely to occur when the signal-to-noise ratio of the comparison signal is low, and provides a real-time audio signal consistency compar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L25/51G10L25/18G10L25/21G10L25/45G10L19/20G10L19/26
CPCG10L25/51G10L25/18G10L25/21G10L25/45G10L19/20G10L19/265
Inventor 陈永泽彭小光吕连新王世为单雪松吴洁
Owner 杭州联汇科技股份有限公司