Title:
【発明の名称】テレビジョン信号の暗号化方法およびその方法を用いた受信装置
Document Type and Number:
Japanese Patent JP2531612
Kind Code:
B2
Abstract:
PCT No. PCT/GB84/00106 Sec. 371 Date Nov. 20, 1984 Sec. 102(e) Date Nov. 20, 1984 PCT Filed Mar. 28, 1984 PCT Pub. No. WO84/04013 PCT Pub. Date Oct. 11, 1984.A method of encrypting a television signal having in each ruster scan line a digital section of information and chrominance and luminance sections of information comprising cutting either or both of the chrominance and luminance sections and rotating the cut sections within a normal line period. If one of the sections is uncut, it may be translated in time with respect to the line period by having one of the rotated cut sections placed before the uncut section and one placed after the uncut section. The cutting point or points are determined by a pseudo random number generator. Receiving apparatus for receiving such an encrypted signal is also disclosed in which a complementary pseudo random number generator is used responsive to receipt of an encryption key to control addressing of a descrambling store in order to reconstitute the original signal.
Inventors:
ROTSUJI NIKORASU KIMU
MEISON AASAA GORUDON
FURANNIGAN BERII AASAA
MEISON AASAA GORUDON
FURANNIGAN BERII AASAA
Application Number:
JP50160184A
Publication Date:
September 04, 1996
Filing Date:
March 28, 1984
Export Citation:
Assignee:
INDEPENDENTO BUROODOKYASUTEINGU OOSORITEI
International Classes:
H04N11/00; H04N7/167; H04N7/169; H04N11/08; H04N11/24; (IPC1-7): H04N11/00; H04N11/08; H04N11/24
Attorney, Agent or Firm:
Takehiko Suzue (2 outside)