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Open accessProceedings ArticleDOI
05 Oct 1999
57 Citations
The audio information system implemented on an LED traffic light can provide the function of open space, wireless broadcasting of audio messages.
In this study we demonstrate an effect for amplitude modulation (AM) that is analogous to forward making of audio frequencies, i. e., the modulation threshold for detection of AM (signal) is raised by preceding AM (masker).
Proceedings ArticleDOI
Fan Chen, HongJie He, Hongxia Wang 
27 May 2008
21 Citations
In this paper, we propose a method for self-embedding an audio signal into itself as a means for protecting the content of audio signal.
These developments enable new possibilities for advanced audio signal processing, such that in the future we can record, transmit and reproduce spatial audio in ways that have not been possible before.
Proceedings ArticleDOI
03 Apr 1990
89 Citations
A new technique is proposed which makes possible the inaudible addition of extra information to an audio signal.
This paper describes an audio system that is well-suited for use in a small confined area with many audio transmitters broadcasting different audio signals.
Open accessJournal ArticleDOI
01 Aug 2017
15 Citations
Hence, there is a need to encrypt the message with stream cipher before embedding the message into the audio.
In this paper, we propose an aerial acoustic communication system using inaudible audio signal for low-rate communication in indoor environments.
Proceedings ArticleDOI
Haider Ismael Shahadi, Razali Jidin 
01 Dec 2011
26 Citations
The results show that message can be embedded up to 42 % of the total size of the cover audio signal with at least of 50 dB signal to noise ratio.
The data imply that 3-D audio provides an effective mode of message presentation in systems with multiple radio communications.