Aachener Beiträge zu digitalen Nachrichtensystemen – serie
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4 produkter
HD Telephony by Artificial Bandwidth Extension
Quality, Concepts and Complexity
Häftad, 2021
590 kr
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The audio bandwidth of digital landline and mobile telephone networks is still mostly restricted to 200 Hz to 3.4 kHz. This is due to compatibility requirements during the transition phase from analogue to digital transmission technology. The resulting characteristic "telephone speech" is widely …
Active Noise and Occlusion Effect Cancellation in Headphones and Hearing Aids
Häftad, 2010
569 kr
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The perception of one’s own voice is distorted when telephoning with headsets, or wearing hearing aids. The reason for this is the so-called occlusion effect, which occurs when ear canals are completely or partially closed by the headset or hearing aid. The occlusion causes amplification at low …
Multi Channel Audio Processing: Enhancement, Compression and Evaluation of Quality
Häftad, 2014
577 kr
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The demand for high definition audio and video services is rapidly increasing. Two representative examples for this are audio-visual conferencing or video storage and delivery. In this context, efficient techniques are required for enhancement and compression of multi channel audio signals with …
Wind Noise Reduction
Signal Processing Concepts
Häftad, 2016
590 kr
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With the technological progress, devices, such as mobile phones, tablet computers or hearing aids, can be used in a large variety of every-day situations for mobile communication. Acoustic background noise signals, which are picked up with the desired speech signal, can impair the signal quality …
