Inventor
NUMAKURA TOSHIHIKO
JP11 patents
Patents
11 patentsUS5243411ASep 7, 1993
Anti-piracy video tape system has anti-piracy components added to the luminance signal and the color difference signals
SONY CORP60 citations96
US4233621ANov 11, 1980
Method and apparatus for recording and reproducing a color-aligned line-sequential color video signal
SONY CORP12 citations73
US4220964ASep 2, 1980
Secam recording and reproducing system
SONY CORP16 citations73
US4208673AJun 17, 1980
Color recorder for reducing crosstalk
SONY CORP12 citations72
US4193084AMar 11, 1980
Video recorder having means for maintaining constant the amplitude of the frequency-modulated signal
SONY CORP11 citations72
US4186411AJan 29, 1980
Recording and playback modulation method and apparatus
SONY CORP7 citations72
US4180833ADec 25, 1979
Apparatus and method for reproducing video signals
SONY CORP13 citations72
US4780769AOct 25, 1988
Recording and reproducing apparatus for time compressed video signals wherein said signals are expanded and converted into two separate channels before recording
SONY CORP14 citations69
US4175272ANov 20, 1979
Video signal processing circuitry for compensating different average levels
SONY CORP4 citations62
US4851928AJul 25, 1989
Apparatus for recording low and high bond components of a chrominance signal
SONY CORP6 citations60
US4268874AMay 19, 1981
Transducer deflection apparatus for use in a video signal reproducing device
SONY CORP4 citations56