Portable color video signal recording apparatus

Claim 2

A recording and reproducing apparatus with an image pick-up function, comprising: image pick-up means (1) for obtaining a luminance signal (Y-signal), a chrominance signal including two color difference signals, for example R-Y signal, and B-Y signal, and a synchronizing signal in accordance with an image being picked up, means (7) for obtaining a luminance recording signal through angle-modulation of said luminance signal; means (29) for generating a carrier signal; means (28) for obtaining a chrominance recording signal of a frequency band which does not overlap a frequency band of said luminance recording signal by directly modulating said carrier signal with said chrominance signal; and means (9) for adding together said luminance recording signal and said chrominance recording signal for recording on a recording medium.

Claim 3

An apparatus according to claim 1, wherein means for obtaing said luminance signal in said image pick-up means (1) includes means for generating a reference signal, means (29) for obtaing the synchronizing signal through frequency division of said reference signal, and means (30) for obtaining luminance information signal in accordance with the image being picked up and adding said luminance information signal with said synchronizing signal to thereby obtain said luminance signal, said carrier signal (29) generating means being adapted to derive the carrier signal through frequency division of said reference signal.

Claim 4

An apparatus according to claim 1, wherein said carrier signal generating means (29) includes means for generating such a carrier signal that a frequency spectrum of the chrominance recording signal obtained through modulation of said carrier signal is in a frequency interleaved relation between adjacent recording tracks.

Claim 5

An apparatus according to claim 3, wherein said carrier signal generating means (29) includes means for generating two kinds of the carrier signals such that frequency spectra of two kinds of chrominance recording signals obtained through modulation of said carrier signals with the chrominance signal are in a frequency-interleaved relation to each other, means for generating a switching signal for changing-over said two kinds of carrier signals to each other in dependence on the recording track so that said two kinds of chrominance recording signals are alternately recorded ' on the adjacent recording tracks, and means for changing-over alternately said two kinds of carrier signals for every recording track in response to said switching signal.

Claim 6

An apparatus according to claim 4, wherein said carrier signal generating means and selecting means comprises: means for producing the reference signal having a frequency four times as high as the frequency of said carrier signal; means for obtaining four kinds of signals the phases of which are different by 90° from one another by dividing the frequency of said reference signal by four; means for obtaining a first signal to generate a synchronizing signal having a frequency twice as high as the frequency of a horizontal synchronizing signal through frequency division of one of said four kinds of signals; means for obtaining a second signal to generate the synchronizing signal having a frequency equal to that of the horizontal synchronizing signal by dividing the frequency of said first signal to general the synchronizing signal by two, means for generating a control signal from said second signal to generate the synchronizing signal and said switching signal for controlling the change-over means in such a manner that a desired carrier signal is obtained by sequentially changing over said four kinds of signals for every horizontal period, and means for obtaining the desired carrier signal by changing over sequentially said four kinds of signals for every horizontal period under the control of said control means in such a manner that a first type of the carrier signal the phase of which is advanced by 90° for every horizontal period during the recording on a certain track is obtained in addition to a second type of the carrier signal the phase of which is delayed by 90° during the recording on the next track, said first and second types of carrier signals sequentially alternating with each other for the recording on every recording track.

Claim 7

An apparatus according to claim 5, further including means for deriving said first and second signals to generate the synchronizing signal.

Claim 8

An apparatus according to claim 1, wherein said means for obtaining the chrominance recording signal is adapted to obtain the chrominance recording signal directly through quadrature phase modulation of said carrier signal with the chrominance signal, in the chrominance signal equivalent to said quadrature phase modulated signal being obtained through balanced modulation of a first carrier signal with the (B-Y) color difference signal, and through balanced modulation of a second carrier signal delayed by 90° relative to the phase of said first carrier signal ' with the (R-Y) color difference signal, and through addition of said two modulated signals.