SECURE WATERMARK METHOD AND APPARATUS FOR DIGITAL SIGNALS

Watermark data (116) is encoded in a digitized signal (110) by forming a noise threshold spectrum (210) which represents a maximum amount of imperceptible noise, spread-spectrum chipping (206) the noise threshold spectrum with a relatively endless stream of pseudo-random bits (204) to form a basis s...

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Bibliographische Detailangaben

1. Verfasser:	LEVINE, EARL
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACOUSTICS CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMAGE DATA PROCESSING OR GENERATION, IN GENERAL MUSICAL INSTRUMENTS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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