Sub-channel below the perceptual threshold in audio

This paper explores the concept and possible ways of making use of an audio channel's capacity below the perceptual threshold as a hidden sub-channel. Such an audio channel can be a one with conventional telephony or with voice-over-IP. Since the sub-channel is hidden, not detectable by the hum...

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Bibliographic Details
Published in2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03) Vol. 2; pp. II - 325
Main Author Heping Ding
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Acoustic signal processing
Bandwidth
Councils
Ear
Frequency conversion
Hardware
Humans
Modems
Payloads
Telephony
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Summary:This paper explores the concept and possible ways of making use of an audio channel's capacity below the perceptual threshold as a hidden sub-channel. Such an audio channel can be a one with conventional telephony or with voice-over-IP. Since the sub-channel is hidden, not detectable by the human ear, a communications system equipped with this technology will be compatible with the existing system in terms of audio signal transmission. Two potential applications of the technology are concurrent services and the extension of audio bandwidth. The latter application provides the listener with an improved audio quality.
ISBN:9780780376632
0780376633
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2003.1202360