Audio noise real-time 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: 2014-12-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Audio noise real-time detection method based on correlation analysis
  • Audio noise real-time detection method based on correlation analysis
  • Audio noise real-time detection method based on correlation analysis

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an audio noise real-time detection method based on correlation analysis, which is used for performing real-time noise detection on audio streams. The audio noise real-time detection method comprises the following steps: receiving audio frames, and circularly counting the received audio frames by adopting a frame counter; once the frame counter counts to Nf, performing signal component weakening, correlation analysis and noise judgment, and resetting the frame counter. The audio noise real-time detection method is suitable for detecting various kinds of noises such as white noise, pink noise and high-frequency channel noise in audios; when a signal and noise coexist, the situations of blur audio content and failure in normally listening since the signal is covered by the noise can be avoided; meanwhile, the detection method is simple, is high in processing speed, and can be widely applied to real-time monitoring of audio signals such as broadcast signals and television signals.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): G10L25/78
Inventor甘涛何艳敏黄晓革兰刚周南
OwnerUNIV OF ELECTRONICS SCI & TECH OF CHINA