Cryptography – Cryptanalysis
Patent
1996-10-18
1998-10-13
Buczinski, Stephen C.
Cryptography
Cryptanalysis
360 60, 386 94, 380 20, H04N 7167
Patent
active
058224254
ABSTRACT:
Information for imposing copy generation restrictions is superimposed in the format of an XDS signal that is according to the standard of a closed caption broadcast so as to permit performance of copy generation restriction in response to such information without the need to change the structure of a TV receiver. Copy Generation Restriction Management System (CGMS) information is inserted in the format of the XDS signal defined in association with the closed caption signal superimposed on an analog TV signal at the 21-st line in a vertical blanking interval. The XDS signal is composed of a clock run-in interval, a start bit code, and a 16-bit digital signal which is divided into two bytes respectively representing first and second characters. The XDS signal and the CGMS information can be recognized from the start bit code and the first and/or second character. A recording apparatus recognizes the CGMS information on the 21-st line of a second or even-numbered field so as to perform the corresponding copy generation restriction.
REFERENCES:
patent: 4775901 (1988-10-01), Nakano
patent: 5418853 (1995-05-01), Kanota et al.
patent: 5627655 (1997-05-01), Okamoto et al.
patent: 5668873 (1997-09-01), Yamauchi
patent: 5673357 (1997-09-01), Shima
Ezaki Tadashi
Watanabe Koichiro
Buczinski Stephen C.
Frommer William S.
Sony Corporation
LandOfFree
Methods of transmitting and recording television signals with co does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods of transmitting and recording television signals with co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of transmitting and recording television signals with co will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-321766