公开(公告)号：US3757034A

公开(公告)日：1973-09-04

申请号：US3757034D

申请日：1972-01-12

Applicant: VICTOR COMPANY OF JAPAN

Inventor： FUJITA M

IPC: H04N9/83 ,  H04N5/78 ,  H04N9/38

CPC classification number: H04N9/83

Abstract: In a color video signal recording and reproducing system, a color video signal is separated into a luminance signal and a carrier chrominance signal. The luminance signal is frequency modulated, while the carrier chrominance signal is frequency converted to a lower frequency band. The frequency modulated luminance signal and the frequency converted carrier chrominance signal are superimposed one upon the other, and the superimposed signal is recorded on and reproduced from a magnetic medium. The frequency modulated luminance signal is separated from the reproduced signal and then demodulated. The frequency converted carrier chrominance signal is also separated from the reproduced signal and then reconverted to its original frequency band. A feedback loop, including a voltage control oscillator, extends from the output of the frequency converter means for reconverting the carrier chrominance signal and terminates at the second frequency converter means. The central oscillation frequency of the voltage control oscillator is sufficiently low so that the feedback loop is not substantially unlocked by frequency drifting caused by ordinary changes in ambient temperature.

公开(公告)号：US3715468A

公开(公告)日：1973-02-06

申请号：US3715468D

申请日：1970-11-10

Applicant: VICTOR COMPANY OF JAPAN

Inventor： FUJITA M

IPC: H04N5/92 ,  H04N9/79 ,  H04N9/898 ,  H04N5/76

CPC classification number: H04N9/7912 ,  H04N5/92 ,  H04N9/898

Abstract: In a color video signal recording and reproducing system, a color video signal is separated into a luminance signal and a chrominance signal. A frequency modulated luminance signal is superimposed on a frequency converted chrominance signal. This superimposed signal is recorded on a magnetic medium and reproduced therefrom. The chrominance signal is converted into a signal having a frequency which makes beats inconspicuous. A signal, which is in opposite phase to the beats, is produced in order to eliminate the beats which are produced in the recording and reproducing processes. The opposite phase signal are added to the luminance signal on either the recording side or the reproducing side of the system.

Abstract translation: 在彩色视频信号记录和再现系统中，彩色视频信号被分成亮度信号和色度信号。 频率调制亮度信号叠加在变频色度信号上。 该叠加信号被记录在磁性介质上并由其再现。 色度信号被转换成具有使拍打不显眼的频率的信号。 产生与节拍相反相位的信号，以消除在记录和再现过程中产生的节拍。 相反的相位信号被加到系统的记录侧或再现侧的亮度信号。