Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1987-07-21
1988-12-06
LaRoche, Eugene R.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
358340, H04N 578
Patent
active
047899069
ABSTRACT:
An apparatus for processing a video signal to be recorded having a pre-emphasis circuit for pre-emphasizing a signal component with a first predetermined frequency band in the video signal to produce a pre-emphasized video signal, a modulating circuit for frequency modulating a carrier with the pre-emphasized video signal to be recorded, an extracting circuit for extracting a signal component with a second frequency band within the first predetermined frequency band and having a level higher than a threshold level from the video signal, a multiplier for multiplying the outputs of the modulating circuit and the extracting circuit, whereby the amplitude of the frequency modulated signal from the modulating circuit at the portion when the extracted signal is obtained is higher than at the rest of the portion, and a recording amplifier for amplifying the output of the multiplier. Accordingly, the level of the frequency modulated video signal is changed in response to the level of the extracted output signal in the second frequency band, thereby to minimize the deteriorations of frequency characteristic and waveform characteristic of the video signal and to avoid the occurrence of an inversion phenomenon.
REFERENCES:
patent: 4597021 (1986-06-01), Yamamitsu et al.
Tsuji Sentaro
Urata Kaoru
Eslinger Lewis H.
LaRoche Eugene R.
Mis David
Sony Corporation
LandOfFree
Video signal recording apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video signal recording apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal recording apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1496244