JPS6486302A - Video scramble system for magnetic recording and reproducing device - Google Patents

Video scramble system for magnetic recording and reproducing device

Info

Publication number
JPS6486302A
JPS6486302A JP24312087A JP24312087A JPS6486302A JP S6486302 A JPS6486302 A JP S6486302A JP 24312087 A JP24312087 A JP 24312087A JP 24312087 A JP24312087 A JP 24312087A JP S6486302 A JPS6486302 A JP S6486302A
Authority
JP
Japan
Prior art keywords
luminance signal
signal
scramble
recording
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24312087A
Other languages
Japanese (ja)
Inventor
Takashi Koga
Akihiro Iida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP24312087A priority Critical patent/JPS6486302A/en
Publication of JPS6486302A publication Critical patent/JPS6486302A/en
Pending legal-status Critical Current

Links

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To eliminate the deterioration of picture quality with simple constitution and less cost by shifting the level of a normal luminance signal, inverting it and applying FM modulation so as to be the same as the recording of the signal through FM modulation at the recording and inverting the FM- demodulated luminance signal into the original polarity at the reproduction. CONSTITUTION:A luminance signal from a scramble circuit 18 is FM-modulated by an FM modulator 19, mixed with a low frequency conversion chrominance signal in a mixer 20. On the other hand, the separated FL luminance signal is FM-modulated by an FM demodulation circuit 35, inputted to a de-emphasis circuit 36 and subjected to de-emphasis processing. The luminance signal subjected to de-emphasis processing is fed to a de-scramble circuit 37, and in case of the scrambled signal, scramble release processing is applied. Thus, scramble/descramble processing is attained with simple constitution by the inversion and level shift of the luminance signal and the frequency shift is the same as the conventional luminance signal recording, the picture quality is not lost.
JP24312087A 1987-09-28 1987-09-28 Video scramble system for magnetic recording and reproducing device Pending JPS6486302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24312087A JPS6486302A (en) 1987-09-28 1987-09-28 Video scramble system for magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24312087A JPS6486302A (en) 1987-09-28 1987-09-28 Video scramble system for magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS6486302A true JPS6486302A (en) 1989-03-31

Family

ID=17099097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24312087A Pending JPS6486302A (en) 1987-09-28 1987-09-28 Video scramble system for magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS6486302A (en)

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