Data processing: speech signal processing – linguistics – language – Speech signal processing – Application
Patent
1997-07-28
1999-09-28
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Application
704205, 704275, 360 60, 360 32, 360 64, 360 58, 3692753, 369 32, G10L 900
Patent
active
059603984
ABSTRACT:
A copyright information embedding system is provided which is designed to embed information for copyright protection into digital audio signals without deterioration of analog audio signals reproduced. The copyright information embedding system includes an A/D converter, a modulator, a level detector, and a copyright data embedding circuit. The A/D converter converts an analog audio signal into a digital signal. The modulator modulates a copyright data signal for the digital signal using spectrum spread. The level detector detects a variation in level of the digital signal. The copyright data embedding circuit divides the copyright data signal into several codes and embeds them into the digital signal each time the variation in level of the digital signal shows a preselected variation such as a rapid rise or drop.
REFERENCES:
patent: 4939515 (1990-07-01), Adelson
patent: 5023730 (1991-06-01), Sakata et al.
patent: 5130864 (1992-07-01), Shimada
patent: 5319735 (1994-06-01), Preuss et al.
patent: 5428598 (1995-06-01), Veldhuis et al.
patent: 5530751 (1996-06-01), Morris
patent: 5579120 (1996-11-01), Oguro
Bender, W., et al, "Techniques for data hiding", Proc. Spie, vol.2420, Jan. 1, 1995, pp. 164-173.
Boney et al., ("Digital Watermarks for audio signals", Proceedings of IEEE Multimedia '96, Jan. 1996, pp. 473-480).
Mintzer et al., (Digital Watermarking schemes based on vector quantization, IEEE 97, Jun. 1997, pp. 95-96).
Cox et al., ("Secure Spread Spectrum Watermarking for Multimedia", IEEE Transactions on Image Processing, vol. 6, No. 12, Dec. 1997, pp. 1673-1687).
Fuchigami Norihiko
Tanaka Yoshiaki
Ueno Shoji
Chawan Vijay B.
Hudspeth David R.
Meller Michael N.
Wictor Company of Japan, Ltd.
LandOfFree
Copyright information embedding apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Copyright information embedding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copyright information embedding apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-715895