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A real-time audio noise detection method based on correlation analysis

A technology for audio noise and real-time detection, applied in speech analysis, instruments, etc., can solve problems such as audio noise real-time detection methods that have not yet been seen, and achieve the effect of fast processing and simple algorithm

Inactive Publication Date: 2017-06-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

Based on these considerations, there have been no reports in the literature on real-time audio noise detection methods suitable for broadcasting stations.

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  • A real-time audio noise detection method based on correlation analysis
  • A real-time audio noise detection method based on correlation analysis
  • A real-time audio noise detection method based on correlation analysis

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Embodiment Construction

[0029] This embodiment takes as input an actual broadcast "weather forecast" audio. The sampling rate of this audio segment is 48KHz, and the duration is 20 seconds. This audio segment contains normal audio and 3 different noises. The first 5 seconds are white noise when there is no broadcast signal, and the human voice is added to the background from the 6th second. The normal audio of the music lasted for 5 seconds, then was disturbed by the environment at the 11th second, and a strong interference noise was generated in the audio, which made the content of the human voice blurred and could not be listened to normally. The interfering noise continued until the end of the audio segment and changed at 17 seconds. The time-domain waveform diagram of the entire test audio is as follows figure 2 shown. Divide the audio data into audio frames according to the length of 512 sampling points, and the total number of frames is 1875 frames. The 1125th frame is taken as an example be...

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Abstract

The present invention provides a real-time audio noise detection method based on correlation analysis, which is used for real-time noise detection of audio streams. First, audio frames are received, and frame counters are used to perform cyclic counting of the received audio frames; N f After that, weaken the signal component, correlate analysis and noise judgment, and set the frame counter to zero at the same time. The invention is suitable for detecting various types of noise in audio, such as white noise, pink noise, high-frequency channel noise, etc. When the signal and noise exist at the same time, it can also detect that the signal is covered by noise and the audio content is blurred , cannot be listened to normally; at the same time, the detection method has a simple algorithm and fast processing, and can be widely used in real-time monitoring of audio signals, such as radio and television signal monitoring.

Description

technical field [0001] The invention belongs to the technical field of digital audio processing, in particular to an audio noise detection method based on correlation analysis, which can be applied to automatic real-time monitoring of audio signals. Background technique [0002] Today, audio broadcasting has become the most popular medium of publicity and entertainment. Due to the complexity of the broadcasting system itself and the influence of external factors in the transmission, transmission and reception links, there are often broadcast anomalies or failures in broadcasting. Therefore, normal and safe broadcasting has always been a basic goal of broadcasting station business, and an important means to achieve this goal is to effectively monitor the quality of broadcasting audio. At present, domestic radio broadcasting monitoring has transitioned from the traditional manual method to computer-aided completion, and the monitoring automation of some simple abnormal events...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L25/78
Inventor 甘涛何艳敏黄晓革兰刚周南
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA