Enhancement of Narrowband Audio Signals Using Single Sideband AM Modulation
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United States of America Patent
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Issued Date -
May 14, 2015
app pub date -
Jun 12, 2014
filing date -
Nov 12, 2013
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Abandoned
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Abstract
The present document relates to the efficient processing of audio signals for enhancing the perceptual quality of the audio signal. An audio processing unit configured to generate an enhanced audio signal from an input audio signal is described. The input audio signal is sampled at a first sampling rate and the enhanced audio signal is sampled at a second sampling rate, wherein the second sampling rate is higher than the first sampling rate. The input audio signal comprises spectral content in a frequency range up to a first frequency and the enhanced audio signal comprises spectral content in a frequency range up to a second frequency, wherein the second frequency is higher than the first frequency. The audio processing unit comprises an upsampling and interpolation unit configured to generate an upsampled audio signal at the second sampling rate from the input audio signal.
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