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Audio signal processing

About: Audio signal processing is a research topic. Over the lifetime, 21463 publications have been published within this topic receiving 319597 citations. The topic is also known as: audio processing & Acoustic signal processing.


Papers
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Patent
28 Jul 1980
TL;DR: In this article, a delay detector is used to measure the video delay through a video processing system, such as one or more frame synchronizers, and a variable audio delay is controlled by the detector so as to equalize the delays of the video and audio signals.
Abstract: The audio synchronizer includes a delay detector for measuring the video delay through a video processing system, such as one or more frame synchronizers, and a variable audio delay controlled by the detector so as to equalize the delays of the video and audio signals.

92 citations

Journal ArticleDOI
TL;DR: Digitally processing quantised (but not sampled) signals produces no aliasing and reduces the in-band quantisation error.
Abstract: Digitally processing quantised (but not sampled) signals produces no aliasing and reduces the in-band quantisation error. Techniques for accomplishing such processing are proposed. Experimental evidence is included.

92 citations

Proceedings ArticleDOI
18 Oct 2015
TL;DR: The Acoustic Characterization of Environments (ACE) Challenge is a competition to identify the most promising non-intrusive DRR and T60 estimation methods using real noisy reverberant speech.
Abstract: Knowledge of the Direct-to-Reverberant Ratio (DRR) and Reverberation Time (T 60 ) can be used to better perform speech and audio processing such as dereverberation. Established methods compute these parameters from measured Acoustic Impulse Responses (AIRs). However, in many practical situations the AIR is not available and the parameters must be estimated non-intrusively directly from noisy speech or audio signals. The Acoustic Characterization of Environments (ACE) Challenge is a competition to identify the most promising non-intrusive DRR and T 60 estimation methods using real noisy reverberant speech. We describe the ACE corpus comprising multi-channel AIRs, and multi-channel noise including ambient, fan and babble noise recorded in the same environment as the measured AIRs, along with the corresponding DRR and T 60 measurements. The evaluation methodology is discussed and comparative results are shown.

92 citations

PatentDOI
TL;DR: In this article, the authors describe a sound reproduction unit having a diaphragm which is configured to perform sound reproduction based on a sound signal, including a sound pickup unit and an abnormality determination unit to determine occurrence or non-occurrence of an abnormal sound.
Abstract: A headphone device includes: a sound reproduction unit having a diaphragm which is configured to perform sound reproduction based on a sound signal; a sound pickup unit configured to perform a sound pickup operation; a filtering unit configured to apply filtering to a picked-up sound signal obtained by the sound pickup unit, to give a noise-cancelling signal characteristic; a combining unit configured to combine the picked-up sound signal that has undergone filtering, and a listening sound signal which is inputted separately, to generate a sound signal supplied to the sound reproduction unit; and an abnormality determination unit configured to determine occurrence or non-occurrence of an abnormal sound, on the basis of a result of level detection of a sound signal obtained within a sound signal processing system that includes the filtering unit and the combining unit and is formed between the sound pickup unit and the sound reproduction unit.

92 citations

Patent
12 Mar 2012
TL;DR: In this paper, an active noise control system was proposed to generate sound waves to destructively interfere with an undesired sound in a targeted space, where a speaker was also driven to produce sound waves representative of a desired audio signal.
Abstract: An active noise control system generates an anti-noise signal to drive a speaker to produce sound waves to destructively interfere with an undesired sound in a targeted space. The speaker is also driven to produce sound waves representative of a desired audio signal. Sound waves are detected in the target space and a representative signal is generated. The representative signal is combined with an audio compensation signal to remove a signal component representative of the sound waves based on the desired audio signal and generate an error signal. The active noise control adjusts the anti-noise signal based on the error signal. The active noise control system converts the sample rates of an input signal representative of the undesired sound, the desired audio signal, and the error signal. The active noise control system converts the sample rate of the anti-noise signal.

92 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202319
202263
2021217
2020525
2019659
2018597