Back to results
US 5,063,457 AGranted
Wide-band video signal recording apparatus by using frequency interleave
AssigneeCanon Kabushiki Kaisha
InventorsHisashi Ishikawa, Susumu Kozuki, Koji Takahashi, Katsuji Yoshimura
Life of this patent
Estimating the term…
Abstract
A wide-band video signal recording apparatus is arranged: to frequency modulate a low frequency band portion of a luminance signal; to multiplex a high band portion of the luminance signal with a carrier chrominance signal in such a way as to have their spectra interleaved with each other; and to perform signal recording by further multiplexing the multiplexed signal with the low band of the frequency modulated signal.
Claims10
A video signal recording apparatus comprising:
- a) input means arranged to be capable of selectively receiving a first video signal consisting of a carrier chrominance signal, a low-band luminance signal which is limited to a given low frequency band and a high-band luminance signal which is frequency interleaved with the low-band luminance signal or a second video signal consisting of a luminance signal having a narrower band than the band of said first video signal and a chrominance signal which is frequency interleaved with said luminance signal;
- b) a first filter arranged to limit the band of said low-band luminance signal included in said first video signal or that of said luminance signal included in said second video signal;
- c) modulating means arranged to frequency modulate the signal which is band limited by said first filter;
- d) a second filter arranged to limit the bands of the high-band luminance signal and the chrominance signal included in said first video signal or that of the chrominance signal included in said second video signal;
- e) converting means arranged to frequency convert the signal which is band limited by said second filter to the low band of said frequency modulated signal modulated by said modulating means;
- f) multiplexing means for multiplexing said frequency converted signal converted by said converting means with said frequency modulated signal;
- g) recording means for recording on a recording medium a multiplexed signal obtained by the multiplexing action of said multiplexing means;
- and
- h) discriminating means for making a discrimination as to whether the signal received by said input means is said first video signal or said second video signal.
6 more elements
A video recording apparatus, comprising:
- a) input means for receiving an encoded video signal including a low-band luminance signal which has a low frequency band component of a luminance signal, a chrominance signal which is frequency interleaved with said low-band luminance signal relative to a horizontal scanning frequency and a shifted high-band luminance signal which has a high frequency band component of said luminance signal and is allocated within a lower frequency than a maximum frequency of said low-band luminance signal and is frequency interleaved relative to said horizontal scanning frequency with said low-band luminance signal and is also frequency interleaved relative to a vertical scanning frequency with said chrominance signal;
- b) filter means for separating, from said encoded video signal received by said input means, said low-band luminance signal and a composite signal comprising said chrominance signal and said shifted high-band luminance signal, said filter means utilizing the correlativity of video signals in the vertical direction and not the correlativity thereof in the temporal direction;
- c) modulating means arranged to frequency modulate said low-band luminance signal separated by said filter means and to form a frequency modulated luminance signal;
- d) converting means arranged to convert the frequency of said composite signal separated by said filter means to form a converted composite signal which is located within a frequency band lower than said frequency modulated low-band luminance signal;
- e) multiplexing means arranged to form a recording signal by frequency multiplexing said frequency modulated low-band luminance signal and said converted composite signal;
- and
- f) recording means for recording said recording signal on a recording medium.
- f) recording means for recording said recording signal on a recording medium.
5 more elements
Dependencies are inferred from the claim text.