Enhanced acoustic transmission system and method

Details Enhanced acoustic transmission system and method Enhanced acoustic transmission system and method

2000-06-27

2010-02-16

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Sound or noise masking

C380S238000, C381S002000

Reexamination Certificate

active

07664274

ABSTRACT:
A system to generate an enhanced acoustic transmission signal includes a carrier signal generator to generate a carrier signal. A data signal generator is provided to receive data and to generate a data signal representing the data. A signal modulator is also provided to modulate the carrier signal with the data signal to form a modulated carrier signal at a carrier frequency. The system includes a masking signal generator to generate a masking signal to mask the modulated carrier signal from being audible by a human ear. An audio input device is provided to receive audio and to generate an audio signal based on the audio, wherein a frequency band surrounding the carrier frequency is removed from the audio signal. A signal adder is also provided to combine the modulated carrier signal, the masking signal, and the audio signal to form the enhanced acoustic transmission signal.

REFERENCES:
patent: 4035838 (1977-07-01), Bassani et al.
patent: 4876617 (1989-10-01), Best et al.
patent: 6584138 (2003-06-01), Neubauer et al.
1996 IEEE International Conference on Multimedia Computing and Systems, Jun. 17-23, Hiroshima, Japan; Laurence Boney et al.; “Digital Watermarks for Audio Signals”, pp. 473-480.

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