METHOD AND APPARATUS FOR LOW COST AUDIO SCRAMBLING AND DESCRAMBLING - Patent 0744105

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EP 0 744 105 A1

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(43)	Date of publication:
	27.11.1996 Bulletin 1996/48

(21)	Application number: 94931915.0

(22)	Date of filing: 18.10.1994

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International Patent Classification (IPC):

H04B 15/ 00^{( . )}

H04K 1/ 04^{( . )}

(86)	International application number:
	PCT/US1994/011891

(87)	International publication number:
	WO 1995/012922 (11.05.1995 Gazette 1995/20)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB IE IT LI LU NL PT SE

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Priority:

14.12.1993 US 19930145066

(71)	Applicant: MACROVISION CORPORATION
	Mountain View, CA 94040 (US)

(72)	Inventor:
	QUAN, Ronald Cupertino, CA 95014 (US)

(74)	Representative: Needle, Jacqueline, et al
	W.H. BECK, GREENER & CO 7 Stone Buildings Lincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)

(54)	METHOD AND APPARATUS FOR LOW COST AUDIO SCRAMBLING AND DESCRAMBLING