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Noise

About: Noise is a research topic. Over the lifetime, 5111 publications have been published within this topic receiving 69407 citations. The topic is also known as: Мопсы танцуют под радио бандитов из сталкера 10 часов.


Papers
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Patent
25 Feb 2015
TL;DR: In this article, a sound recording direction set by a user is received through a touch screen; a directional sound recording parameter corresponding to the sound recording directions is obtained; and sound data in the sound record direction are recorded through a microphone array via the directional sound record parameter.
Abstract: The invention relates to a sound recording method and device and belongs to the field of audio and video processing. The method comprises the steps that during video shooting, a sound recording direction set by a user is received through a touch screen; a directional sound recording parameter corresponding to the sound recording direction is obtained; and sound data in the sound recording direction are recorded through a microphone array via the directional sound recording parameter. Only the sound data in the sound recording direction are recorded, the problem that sound data collected by an internal microphone are always mixed with the sound which the user wishes to record and environment noise, and the sound quality of a shot short video is poor is solved, the effect that only the sound which the user wishes to record is recorded is achieved, the sound quality of the shot short video is improved, and user experience is improved.

16 citations

Journal ArticleDOI
TL;DR: The performance of the 2D Standard Map chaotic map in the proposed communication model is superior to that of the other two studied chaotic encryption schemes in terms of Spectral Distortion, Log Likelihood Ratio, Correlation Coefficient, Segmental Signal-to-Noise Ratio (SNRseg) and SNR encryption/decryption quality metrics.
Abstract: Nowadays, wireless communications play a vital role in all aspects in our daily life activities. A major part of such communications is audio and its rate increases dramatically. Securing audio during such communications is very important issue. Though OFDM is characterized by its strength against various broadcast impairments, the distinct time and frequency features makes signal of traditional OFDM vulnerable to malicious eavesdropping and intrusion. This paper proposes a communication model for encrypting and transmitting audio over OFDM systems. The 2D Baker, Logistic and Standard chaotic encryption schemes are utilized in the suggested model to encrypt and decrypt the transmitted audio. A simulation model for the proposed communication system is built using various encryption/decryption quality indicators to assess and compare its performance. The results demonstrate a good performance for the suggested communication model using all of the three studied chaotic encryption schemes. It also shows that the proposed communication mode is immune against noise distortion. One more noticed point from the result is that, the performance of the 2D Standard Map chaotic map in the proposed communication model is superior to that of the other two studied chaotic encryption schemes in terms of Spectral Distortion, Log Likelihood Ratio, Correlation Coefficient, Segmental Signal-to-Noise Ratio (SNRseg) and SNR encryption/decryption quality metrics.

16 citations

Proceedings ArticleDOI
07 May 2001
TL;DR: This work derives a new and improved audio data-hiding technique that finds application in a number of exciting scenarios like music enhancement and digital communications over analog data channels, while being robust to channel noise.
Abstract: We combine recent theoretical and algorithmic advances in the area of information-hiding with the current mature knowledge-base in the human audio perception system to propose a novel audio data-hiding technique that significantly pushes the state-of-the-art in the field. Our work is based on a combination of advances in two disjoint fields: information-hiding and human auditory masking. The field of information-hiding has recently seen a resurgence due to advances in the understanding of fundamental bounds from information theory. By integrating this with the human perceptual system knowledge that has been successfully exploited for several years in the audio compression community, we derive a new and improved audio data-hiding technique that finds application in a number of exciting scenarios like music enhancement and digital communications over analog data channels. Our preliminary results show that we can embed data at a rate an order of magnitude higher than existing audio data hiding systems, while being robust to channel noise.

16 citations

Patent
20 May 2009
TL;DR: In this article, a method for inhibiting sterosonic background noise of a mobile terminal is proposed, which comprises the following steps: a, voice is recorded through two microphones on the facade of the mobile terminal unit to obtain an L channel signal and an R channel signal; and the environmental background noise is recorded by a third microphone on the rear of the device to obtain a background noise signal; b, the three signals are subjected to voice signal pretreatment; c, output signals after pretreatment are inputted to a noise echo inhibition unit of a baseband chip of the
Abstract: The invention discloses a method for inhibiting sterosonic background noise of a mobile terminal, which comprises the following steps: a, voice is recorded through two microphones on the facade of a mobile terminal unit to obtain an L channel signal and an R channel signal; and the environmental background noise is recorded through a third microphone on the rear of the mobile terminal unit to obtain a background noise signal; b, the three signals are subjected to voice signal pretreatment; c, output signals after pretreatment are inputted to a noise echo inhibition unit of a baseband chip of the mobile terminal; and d, a result after operation by the noise inhibition unit is subjected to further after-treatment to obtain an L channel audio file and an R channel audio file, and sterosonic recording with the function of inhibiting the background noise is completed. Moreover, the invention also discloses a device utilizing the method. The method and the device for inhibiting the sterosonic background noise of the mobile terminal can realize sterosonic recording with the function of inhibiting the background noise, and can also decide whether to use noise inhibition according to a quiet or a noisy environment.

16 citations

Proceedings ArticleDOI
07 Jan 2015
TL;DR: A very low-latency solution in transient noise suppression for audio streams in laptop and netbook devices is proposed in which short-time transform data is processed sequentially in short frames and a robust statistical model is formulated and estimated using Bayesian inference procedures.
Abstract: In this paper a problem in transient noise suppression for audio streams in laptop and netbook devices is addressed. One or more microphones record voice signals which are corrupted with ambient noise and also transient noise from keyboard and mouse clicks. In the current work, a synchronous reference microphone is embedded in the keyboard which allows for measurement of the key click noise, substantially unaffected by the voice signal and ambient noise. An algorithm is here presented for incorporation of the keybed microphone as a reference signal in a signal restoration process for the voice part. The problem is substantially complicated by the presence of nonlinear vibarations (we postulate) in the hinge and casework of the laptop, which renders a simple linear suppressor ineffective in some cases. Moreover, the transfer functions between key clicks and voice microphone depend strongly upon which key is being clicked. A very low-latency solution is proposed in which short-time transform data is processed sequentially in short frames and a robust statistical model is formulated and estimated using Bayesian inference procedures. Results with real recordings show a significant reduction of typing artefacts at the expense of small amounts of voice distortion.

16 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20221
2021125
2020217
2019224
2018243
2017214