Wide-band video signal recording apparatus by using frequency interleave

Claim 2

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.

Claim 3

An apparatus according to claim 1, wherein said discriminating means includes a band-pass filter which is arranged to have a filtering frequency band higher than the maximum frequency of the low-band luminance signal of said first video signal and to be supplied with the signal received by said input means.

Claim 4

An apparatus according to claim 1, further comprising filter control means for controlling the limiting bands of said first and second filters on the basis of the output of said discriminating means.

Claim 5

An apparatus according to claim 3, wherein said filter control means is arranged to make the limiting band of said first filter narrower and that of said second filter wider when the signal received by said input means is determined by said discriminating means to be said first video signal than when said signal is determined to be said second video signal.

Claim 6

An apparatus according to claim 1, further comprising moving means for moving said recording medium in the direction intersecting the direction in which signal recording is performed by said recording means; and change-over means for changing the recording medium moving speed of said moving means from one speed over to another on the basis of the result of the discrimination made by said discriminating means.

Claim 7

An apparatus according to claim 5, wherein said change-over means causes the recording medium moving speed of said moving means to be a first speed when the signal supplied to said input means is determined by said discriminating means to be said first video signal and to be a second speed which is lower than said first speed when said signal is determined to be said second video signal.

Claim 8

An apparatus according to claim 1, further comprising sub-information recording means for recording, on said recording medium, sub-information relative to the output of said discriminating means.

Claim 9

An apparatus according to claim 7, wherein said sub-information recording means is arranged to multiplex said sub-information with the signal to be recorded by said recording means.

Claim 10

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.

Claim 11

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.

Claim 12

An apparatus according to claim 9, wherein said modulating means is arranged to frequency modulate said low-band luminance signal in such a way as to make a frequency which corresponds to at least a portion of the level thereof higher than the band-width of said luminance signal.