Robust watermark for DSD signals

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C380S229000, C726S026000

Reexamination Certificate

active

07325131

ABSTRACT:
A robust watermark embedded into a Direct Stream Digital (DSD) audio signal including a flat frequency response in a specific frequency range which does not extend below 20 kHz or above 100 kHz. The watermark is therefore hidden in the noise spectrum of the DSD signal, such that the watermark is inaudible to a listener. Since the noise spectrum contains important information that helps provide the DSD signals with sharp transients and an accurate impulse response, the watermark cannot be removed from the DSD signal without causing significant degradation to the signal's audio quality.

REFERENCES:
patent: 5848155 (1998-12-01), Cox
patent: 5889868 (1999-03-01), Moskowitz et al.
patent: 5930369 (1999-07-01), Cox et al.
patent: 6061793 (2000-05-01), Tewfik et al.
patent: 6157330 (2000-12-01), Bruckers et al.
patent: 6209092 (2001-03-01), Linnartz
patent: 6314518 (2001-11-01), Linnartz
patent: 6330672 (2001-12-01), Shur
patent: 6330673 (2001-12-01), Levine
patent: 6345100 (2002-02-01), Levine
patent: 6442285 (2002-08-01), Rhoads et al.
patent: 6522767 (2003-02-01), Moskowitz et al.
patent: 6522769 (2003-02-01), Rhoads et al.
patent: 6674861 (2004-01-01), Xu et al.
patent: 6674876 (2004-01-01), Hannigan et al.
patent: 6690812 (2004-02-01), Reefman et al.
patent: 6718047 (2004-04-01), Rhoads
patent: 6724911 (2004-04-01), Cox et al.
patent: 6810388 (2004-10-01), Sato
patent: 6850619 (2005-02-01), Hirai
patent: 6853676 (2005-02-01), Kim
patent: 6891958 (2005-05-01), Kirovski et al.
patent: 6996521 (2006-02-01), Iliev et al.
patent: 7000113 (2006-02-01), Linnartz
patent: 2001/0029580 (2001-10-01), Moskowitz
patent: 2002/0001277 (2002-01-01), Thomas
patent: 2002/0146147 (2002-10-01), Levy
patent: 2002/0146148 (2002-10-01), Levy
patent: 2003/0046238 (2003-03-01), Nonaka et al.
patent: 2003/0108200 (2003-06-01), Sako
patent: 2003/0172277 (2003-09-01), Suzuki et al.
patent: 2004/0006696 (2004-01-01), Shin et al.
patent: 2004/0015711 (2004-01-01), Ogura
patent: 2004/0024588 (2004-02-01), Watson et al.
Anonymous: “Super Audio Compact Disc—A Technical Proposal” Internet Article, ′Online! 1997, XP002186479, pp. 1-12.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Robust watermark for DSD signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Robust watermark for DSD signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Robust watermark for DSD signals will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2796687

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.