JPH02177792A - Image signal recording or reproducing device - Google Patents

Abstract

PURPOSE:To record and reproduce an image signal with high definition by recording a pilot signal with a frequency near to the frequancy band of a frequency-modulated color information signal less than the frequency of an ordinary preset value in the case of recording the image signal with the large amount of high frequency component. CONSTITUTION:When a signal read out from a CCD 3 includes a frequency component >=6MHz exceeding a prescribed level, the pilot signal fT2 of 160fH is added, and when it does not include the frequency component >=6MHz exceeding the prescribed level, the pilot signal fT1 of 195fH is added. And it is recorded on a video floppy 16 with the image signal, and the pilot signal fT having the same jitter component as that of a reproducing image signal is separated at a BPF 28 or 34. Then, a clock pulse with a frequency of 780fH is generated, and a phase is adjusted to accurately perform the re-sampling a Y signal, an (R-Y) signal, and a (B-Y) signal reproduced setting a reference pulse inserted and recorded in the vertical flyback period of the image signal at the time of performing recording as phase reference by a phase shifter 41.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is an image signal recording or reproducing apparatus that records an image signal on a recording medium and reproduces the image signal recorded on the recording medium.

[Conventional technology] Conventionally, CCD (Charge Coupled
An electronic still video camera (hereinafter referred to as a floppy camera) has already been commercialized as a system for recording an image signal obtained from an image sensor such as a device as a still image signal on a disc-shaped magnetic recording medium (video floppy). . Images recorded with this front-end camera do not require a developing process like silver halide photography, so they can be viewed immediately on a television monitor or hard copy.

By the way, the image quality, especially the resolution, of images taken with this floppy camera is largely determined by the number of pixels of the image sensor.In other words, the horizontal resolution is limited by the number of horizontal pixels, and the vertical resolution is limited by the number of pixels in the horizontal direction. This is determined by the number of scanning lines in the NTSC system.

Therefore, while maintaining compatibility with the conventional Sv system,
The applicant of the present application is considering a method of obtaining an image having a resolution of about 1:]00x100 (about 1 pixel), which is comparable to TV (formerly GH Definition TV).

That is.

As shown in Figure 7, out of 1:100x 1000 pixels, ○ mark and
The pixel signal of each line represented by 00 pixels (vertical) is divided into four tracks A, B, C, and D on the video floppy and recorded, and when played back, it is recorded on the tracks on the video floppy. The pixel signals that have been divided and recorded are reconstructed on the semiconductor image memory, and further interpolation is performed between pixels.
This allows a silver halide photo difference print to be obtained using a printer or the like as an image of 1300 pixels (horizontal) x 1000 pixels (vertical).

In this case, as a method for outputting image signals from the image sensor, it is necessary to read out the charges accumulated in the image sensor in as short a time as possible in order to prevent deterioration of the S/N ratio due to an increase in dark current. Each line A and B on the image sensor is read out while the magnetic head is tracing one track on the video floppy, and while the magnetic head is tracing the next track on the video floppy. Each line of C and D on the image sensor is read out.

That is, while the video floppy rotates once, of the two-channel magnetic head, channel 1 is simultaneously supplied with a signal obtained from line A on the image sensor, and channel 2 is simultaneously supplied with a signal obtained from line B on the image sensor. In this way, during the first rotation, the magnetic head is moved two track pitches, and
Of the channel magnetic heads, signals obtained from line C on the image pickup device are supplied to channel 1, and signals obtained from line D on the image pickup device are supplied to channel 2 at the same time.

In this case, the position on the track pattern of the horizontal synchronization signal (H-SYNC) of the image signal recorded on each track is determined by taking into account crosstalk between channels of the magnetic head during recording, as shown in FIG. It is desirable that the well-known H alignment is established between AB and CD, and in this way, in a conventional SV playback device, when a frame image is played back using a two-channel magnetic head, AB traffic and CD ) - Since the H arrangement of the racks is offset by the station H (H is the horizontal synchronization period), a simple frame image can be reproduced by reproducing the BC track.

Now, the method of thinning out every other pixel of the image signal having the pixel arrangement shown in FIG. Because the transmission is not the waveform, but the sample value using offset sampling,
The transfer function of the total transmission path of the longitudinal recording/reproducing and FM modulation/demodulation systems must satisfy the well-known first Nyquist criterion.

In addition, during playback, it is necessary to accurately resample the sample points of the sampling performed on the Q poem, and in order to accurately correct the time axis fluctuations that occur in the magnetic recording and reproducing system within the H period, T B C (Time Ba5eCorrect
or) is required.

Therefore, as shown in FIG. 8, between the chrominance (C) FM signal band and the luminance (Y) FM signal band.

A method has been considered in which continuous pilot signals (rT) for TBC are frequency-multiplexed and recorded.

That is, this method performs TBC by generating a memory write clock having the same jitter component as the pilot signal during reproduction using a PLL configuration, and storing the reproduced image signal in the image memory according to the memory write clock.

In this method, the pilot signal has a frequency of 2.5 to 3.
．． Since it can be set to 5 MHz and is a continuous signal, it is possible to sufficiently track time axis fluctuations that occur within the H period, making it possible to perform TBC with little residual jitter.

[Issues to be Solved by the Invention] As described above, in the method of performing TBC by frequency-multiplexing recording of the pilot signal fT, the recording level of the pilot signal fA cannot be made very large. When the recording band of the luminance signal Y is wide as shown by the broken line, the luminance signal (Y
-FM) sideband waves may also occur. Therefore, as shown in FIG. 9, the pilot signal f reproduced on the reproduction side
Since a part of the phase of r is disturbed, when a resampling clock is formed using the pilot signal fr, the phase of the sampling clock at the part where the phase is disturbed is distorted, and accurate resampling cannot be performed. There were drawbacks.

Additionally, if the pilot signal f is initially set outside the band of the Y-FM signal, that is, closer to the band side of the FM-modulated color difference line sequential signal (C-FM), the Y-FM
The signal will no longer leak into the pilot signal fA, but
This time, since the pilot signal fA leaks into the C-FM signal band, there was a drawback in that the beat of the color signal became noticeable in pictures with few high frequency components.

The present invention has been made to solve this problem, and its purpose is to provide an image signal recording or reproducing device that can reproduce high-definition images by correcting time axis fluctuations with high precision. do.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a recording device that records an image signal composed of a luminance signal and a color information signal on a recording medium. A device for recording an image signal composed of
A luminance signal frequency modulation means for outputting a luminance signal, a color information signal frequency modulation means for inputting a color information signal, frequency-biasing the input color information signal, and outputting the same, and a frequency modulation means for outputting from the color information signal frequency modulation means. a first pilot signal having a first frequency, which is in a frequency band between the frequency band of the color information signal and the frequency band of the frequency modulated luminance signal output from the luminance information signal frequency modulation means; , a pilot signal generating means for generating a second pilot signal having a higher frequency than the first pilot signal; a detecting means for inputting the luminance signal and detecting a frequency band of the input luminance signal; Depending on the detection result in the means, one of the first pilot signal and the second pilot signal is converted into a frequency-modulated color information signal output from the color information signal frequency modulation means and the luminance signal frequency modulation means. and recording means for recording on a recording medium together with the frequency modulated luminance signal output from the frequency modulated luminance signal, and the frequency modulated luminance signal is added to the image signal composed of the frequency modulated luminance signal and the color information signal. A first pilot signal having a first frequency in a frequency band between the frequency band of and the frequency band of the frequency-modulated color information signal, or a second pilot signal having a higher frequency than the first pilot signal. In an apparatus for reproducing the image signal from a recording medium on which one of the following is recorded, the image signal is reproduced from the recording medium.

a reproduction means for reproducing the first pilot signal or the second pilot signal and outputting each separately; a storage means for storing the image signal output from the reproduction means; and an image signal output from the reproduction means. a first storage control signal forming means for controlling the storage operation of the image signal in the storage means using one pilot signal; and a second pilot signal outputted from the reproduction means to control the image signal storage operation in the storage means. a second signal for controlling the storage operation of the signal;
Depending on the type of pilot signal output from the storage control signal forming means and the reproducing means.

and storage operation control means for controlling the storage operation in the storage means using either the first storage control signal or the second storage control signal.

[Operation] With the above configuration, a pilot signal with a frequency that does not normally affect the frequency-modulated color information signal is recorded, but an image signal with many high frequency components, that is, an image signal with a fine pattern can be recorded. In this case, by taking advantage of the fact that the color beat is not very noticeable, a pilot signal with a frequency lower than the normal setting value and close to the frequency band of the frequency-modulated color information signal is recorded.
With this configuration, it becomes possible to record and reproduce high-definition image signals.

[Example] The present invention will be explained below using examples.

FIG. 1 is a schematic diagram of a recording system of a floppy camera as an embodiment of the present invention.

In Fig. 1, 1 is an optical lens, 2 is an aperture, and 3 is a Y, R, H filter configuration as shown in Fig. 3. C, capable of well-known electronic shutter operation
CD, 4 is a high frequency component detection circuit that detects a 6 MHz frequency component from two lines of Y signals (Yl, Y2) output simultaneously from CCD 3, and is composed of a band pass filter (BPF), a comparator, etc. For example, when the 6 MHz frequency component in the Y signal is higher than a predetermined level, a control signal is output and the pilot signal changeover switch S is switched to the b side in the figure.

5 is y (Yl, Y2) output from the CCD 3.

Forming a color difference signal from the R and B signals, and forming a color difference line sequential signal C by line sequentializing the formed color difference signal,
Furthermore, a process circuit 6-1 and 6-2 outputs a Y signal outputted from the process circuit 5, which performs band limiting and the like on each of the Y and C signals and outputs the same.

FM modulation is applied to the C signal, and FM modulated luminance signal (Y-FM) and FM modulated color difference line sequential signal (C-F
A recording signal processing circuit 7-1.7-2 outputs Y-F from the recording signal processing circuit 6-1.6-2.
An adder circuit for adding the M signal, the C-FM signal, and the pyroft signal fT output from the synchronization signal generator 10, which will be described later, at an appropriate mixing ratio; 8-1.8-2 is a recording amplifier; 9-1゜9- 2 is a two-channel magnetic head with an in-line recording gap; 9-1 is designated as channel L;
Let 9-2 be channel 2.

10 is a CCD driving clock and a 2M class pilot signal fr+(195fo ”F 3.(1
7MHz: fH is the horizontal synchronization signal frequency), fia (16
A synchronization signal generator (SSG) that outputs synchronization signals such as 0fl (42, 52MHz), other vertical synchronization signals (VD), horizontal synchronization signals (HD), and 11 a BPF that extracts a single frequency pilot signal fTI. , 12 is a BPF that takes out a single frequency pilot signal fT2, 13 is a CPU that controls the entire system, and 14 is a magnetic head 9-1゜9-
2 is a head feeding mechanism, 15 is a spindle motor, and 16 is a video floppy disk.

Next, the operation of the configuration shown in FIG. 1 will be explained.

When the CPU 13 is instructed to start a recording operation by operating a shooting start button on an operation unit (not shown),
The entire system is activated, an appropriate exposure amount is determined by a photometry system (not shown), the aperture and shutter speed are set correspondingly, and a subject image is formed on the imaging surface of the CCD 3. Then, before recording, the once accumulated charges are read out from the CCD 3 and inputted to the high frequency component detection circuit 4.

The method of reading signals from the CCD 3 will be described in detail later, but in order to read out information on every other pixel of the CCD 3, the sampling clock rough is set to 780f. In the high frequency component detection circuit 4, when a 6 MHz frequency component is detected at a predetermined level or higher in the signal read out from the CCD 3, the switch S1 is connected to the b side in the figure, and the frequency components of the 6 sets 1z are detected at a predetermined level. When the detection level is not exceeded, that is, when the frequency band of the image signal read out from the CCD 3 is narrow, the switch S1 is connected to the a side in the figure. Furthermore, the image signal read out from the CCD 3 before this recording operation is fed back to a photometry system (not shown) and is also used to further improve exposure accuracy.

As described above, after the detection of the frequency band of the image signal read out from the CCD 3 is completed and the setting of the switch SL is completed, the CCD 3 is exposed again, and the image signal is read out from the CCD 3.

Here, a method of reading signals from the CCD 3 shown in FIG. 3 will be explained.

First, line a of a in the figure, 32. a3...
... and b, pixel signals of lines b, , b, , b3, . . . are output simultaneously according to the driving clock from the 5SGIO. As mentioned above, the CCD 3 is provided with Y, R, B filters as shown in FIG. 3, and the process circuit 5 outputs Y, , Y, , R, B signals. Then, the process circuit 5 uses the signals supplied from the CCD 3 to form color difference signals R-Y and B-Y, and further lines-sequentializes the color-difference signals to form a color-difference line-sequential signal C. ,y,,c signals are band-limited and then output.

Then, the recording signal processing circuit 6-1, 6-2 receives the Y, Y, C signals supplied from the process circuit 5.
, , VD and HD output from 5SGIO are added to the Y signal, and after applying emphasis processing to the Y I, Y 2 and C signals, respectively, FM modulation is performed, and the adder circuit 7
-1.7-2, and are added to the pilot signal fT1 or fT2 output from each 5SGIO. That is, as shown in FIG. 6, when the FM modulation carrier frequency of the luminance signal is 7.7 MHz in the sync tip part and 9.7 MHz in the white beak part.

If the signal read out from the CCD 3 contains frequency components of 6M)Iz or more at a predetermined level or higher, the sidebands generated after FM modulation will be shown as broken lines, so 160f,
When the pilot signal fT2 of
The L+ pilot signal fT1 will be added.

As described above, in adder 7-1, 7-2, Y-FM
The recording signal formed by adding the signal, the C-FM signal, and the pilot signal f is recorded by the recording amplifier &-1,8
-2, the image signal corresponding to line a of the CCD 3 shown in FIG. 3 is amplified by the magnetic head 9-1. The image signal corresponding to line b is simultaneously recorded on two tracks on the video floppy 16 by the magnetic head 9-2 while the video floppy 16 is rotated once by the spindle motor 15.

Thereafter, the magnetic head 9 is moved two track pitches by the head feed mechanism 14, and while the video floppy 16 is rotated once by the spindle motor 15 as described above, image signals corresponding to lines c and d are transferred to the video floppy 16. Record simultaneously on the upper two tracks. FIG. 4 shows a recording pattern of tracks formed on the video floppy 16. In FIG. 4, CR is the RY signal.

C8 represents the BY signal.

Additionally, a reference pulse is inserted and recorded in the latter half of the vertical blanking period of the image signal, as shown in Figure 5, as a phase reference point for accurate resampling of the image signal during playback, which will be described later. . By doing so, it becomes possible to correct the time delay error between the pilot signal f and the image signal that occurs during recording and reproduction.

In FIG. 2, image signals recorded on four tracks on a video floppy 16 by the above-described recording system are sequentially reproduced using a two-channel magnetic head.

By recording the reproduced image signal in the -H image memory and further performing pixel interpolation, approximately 1000 pixels x 1
1 is a diagram showing a schematic configuration of a reproduction system of a floppy camera designed to obtain an output image signal equivalent to that of a 300-pixel HDTV. Components having the same functions as those in FIG. 1 are given the same numbers.

In FIG. 2, 20-1 is a reproduction amplifier that amplifies the reproduction signal from the magnetic head 9-1, and 20-2 is the magnetic head 9-1.
-2 is a reproduction amplifier that amplifies the reproduction signal from 2, 21 is the Y-FM reproduced from the m-ki head 9-1 or 9-2;
After the C-FM signal is demodulated and subjected to de-emphasis processing, the C signal is further converted into color difference signals R-Y and B-Y by line-to-line time processing.

22 is an analog-to-digital (A/D') converter; 23 is an image memory that stores A/D-converted Y, RY, and B-Y signals;
24 is a digital/analog CD/A) converter, 25 is a memory read clock generator, 26 is a memory controller that controls memory write and read addresses, etc., and 27 is a converter for extracting the image signal stored in the image memory 23. an image processing circuit that performs interpolation of pixels, etc.;
is a BPF for extracting the pilot signal ff2 of 16Of from the reproduced image signal, 29 is an amplifier, and 30 is 1
78 frequency divider, 31 a phase comparator, 32 a low pass filter (LPF) which is a loop filter, 33 a frequency divider of 9 to 1, and 34 a pilot signal fA of 195 fH for extracting from the reproduced image signal. BPF, 35 is an amplifier,
36 is a phase comparator, 37 is a loop filter LPF
, 38 is 19 consisting of a detection circuit, a comparator, etc.
5fn pilot signal fT+ detection circuit, 39 a voltage controlled oscillator (VCO) that generates a clock signal with a frequency of 780fo, 40 an h frequency divider, and 41 a vertical retrace period of the image signal inserted during recording. The frequency generated by the VCO 39 using the reference pulse as a phase reference is 78of
This is a phase shifter to match the phase of the □ clock signal.

The operation of the reproducing apparatus shown in FIG. 2 will be explained below.

Magnetic discs 9-1 and 9-2 each trace the a and b tracks on the video floppy 16 shown in FIG. The switch S2 is connected to the a side in the figure, and the image signal recorded on the a track on the video floppy 16 is reproduced.

Then, Y-FM and C-FM recorded on the a track
The FM signal is processed by the reproduction signal processing circuit 21.
After demodulation, de-emphasis processing is performed, and the C signal is roughly line-homogenized to produce color difference signals R-Y,
The signal is converted to B-Y, and the original Y, R-Y, and B-Y signals are output.

On the other hand, the pilot signal f7, which is recorded on the video floppy 16 together with the image signal and has the same jitter component as the reproduced image signal, is separated by the BPF 28 or 34. First, a case will be described in which a pilot signal fTl of 195 fu is recorded.

In this case, the pilot signal fT+ detection circuit 38 is operated, for example, during the vertical synchronization retrace period, and
, the signal at the frequency of the pilot signal fa, the detection circuit 38
The wave is detected by the internal detection circuit. Then, a comparator or the like detects whether the detection output signal from the detection circuit is at a predetermined level or higher, and if there is a detection output signal at a predetermined level or higher from the detection circuit, a 195fl pilot signal fA1 is output. It is determined that there is, and the switch S3 is connected to the b side in the figure.

Then, the pilot signal f extracted by the BPF 34
After being amplified by the amplifier 35, the signal □ is input to one input terminal of the phase comparator 36. Then, a signal having a frequency of 780fo outputted from the VCO 39 is divided into i by a % frequency divider 40 and inputted to the other input terminal. Then, a phase error signal between the two signals is output from the phase comparator 36, and the high frequency component is removed by the LPF 37, which is a roof filter, and the oscillation frequency of the VCO 39 is regenerated into the same phase as the pilot signal f. At the same time, the pilot signal fT2 of 160 f, I is recorded, and the pilot signal fA
When it is determined that there is no pilot signal fTl of 95f, , the switch S3 is connected to the a side in the figure. Then, the pilot signal fT2 extracted from the BPF 28
is amplified by the amplifier 29, and the frequency is divided by 2 by the 18 frequency divider 30.
After being converted into an Of□ signal, it is input to one input terminal of the phase comparator 31. And the other input terminal is connected to a 1 to 9 frequency divider 33.

A signal with a frequency of 780f□ outputted from No. 39 is divided by nine and inputted to the tobi. Then, the phase comparator 31 outputs a phase error signal between the two input signals, and the high frequency component is removed in the LPF 32 which is a loop filter, and the oscillation frequency of the VCO 39 is made the same as the regenerated pilot signal fT2. The phase is controlled to match the phase.

The clock pulse with a frequency of 78OfH thus obtained is inserted into the vertical retrace period of the image signal during recording, and the Y signal, R-Y, BY signal is reproduced using the recorded reference pulse as a phase reference. In order to resample accurately, the phase is adjusted by a phase shifter 41.

A clock pulse with a frequency of 78Of□ that has the same jitter component as the reproduced image signal obtained in this way is
Y, R, -Y, B input to the D converter 22 and memory controller 26 and output from the reproduced signal processing circuit 21
- the Y signal is resampled based on the clock pulses provided in the A/D converter 22, and the memory controller 26 operates based on the clock pulses;
A write address is specified and stored on the image memory 23.

As described above, after the image signal recorded on the a track on the video floppy 16 is stored in the image memory 23, the image signal reproduced from the b track on the video floppy 16 by the magnetic head 9-2 is , are stored in the image memory 23 in the same manner as the image signals reproduced from the a-trunk on the video floppy 16 described above. After storing the image signals reproduced from tracks a and b on the video floppy 16 in the image memory 23, the magnetic head 9-1, 9-2 is moved two track pitches by the head moving mechanism 14, and The image signals recorded on tracks c and d are sequentially reproduced and resampled in the same manner as described above, and then stored in the image memory 23
to be memorized.

As described above, when the storage operation for the image memory 23 recorded on the four tracks on the video floppy 16 is completed, the image processing circuit 27 uses the data stored in the image memory 23 to Pixel interpolation is performed for the pixels indicated by dots in FIG. 7 above to form data for 1300 pixels and 1000 pixels.

Then, from the memory read clock generation base 25, the HDT
A read clock signal with a frequency based on V is sent to the D/A converter 24. The data supplied to the memory controller 26 and stored in the image memory 23 is read out by the memory controller 26, and the read data is further converted into an analog signal by the D/A converter 24.
The A converter 24 outputs an analog Y signal compatible with HDTV.

RY and BY signals are output.

Then, band limitation is performed at the subsequent stage of the D/A converter 24, and R
If the GB reverse paralysis matrix circuit is used, it is possible to output a composite reproduced image signal to an HDTV compatible monitor or the like.

In addition, the pilot signal fT of 160 fH in the reproducing device
The PLL control configuration of 1 may be configured as shown in FIG. 1O, and the frequency of the pilot signal fT is 160
f□ and 195f□. For example, in FIG. 11, the detection frequency of the high frequency component detection circuit 4 at the time of recording is 6.25 MHz, and the image signal read out from the CCD 3 has a frequency of 6.25 MHz or more. If there is a frequency component, the frequency of the pilot signal fa is set to 156fn (2
, 45MHz), and if there is no frequency component of 6-25MIIz or higher, the frequency of the pilot signal fa is set to 175MHz.
fn (2.75 MHz).

The configuration of the PLL control section of the reproduction system in the above case is shown in FIG. 11. In FIG. 11, the frequency of the pilot signal fa is changed, and the frequency division of the frequency divider is Since this is just a change in the ratio, a detailed explanation will be omitted.

Furthermore, in the embodiment of the present invention, the CCD3 which is an image sensor
Although the frequency of the sampling clock is set to 78OfH, it is not limited to 780flI, and the same clock frequency as the sampling clock during recording may be used during reproduction so that the phases of the sampling points during recording and reproduction are aligned.

Also, the frequency of the pilot signal r□ is determined by detecting the frequency band of the pilot signal f7 during playback and determining it according to the level of the detected signal, for example, an ID signal recorded together with the image signal during recording, etc. Information on the frequency of the pilot signal fa may be set and recorded in the ID signal, and the switch S3 may be changed over based on the content of the ID signal during playback.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide an image signal recording or reproducing device that performs highly accurate time axis fluctuation correction and reproduces a high-definition image regardless of the pattern. can.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a recording system of a floppy camera as an embodiment of the present invention, FIG. 2 is a schematic diagram of a playback system of a floppy camera as an embodiment of the present invention, and FIG.
FIG. 4 is a diagram showing the pixel arrangement of the CCD 3 in the embodiment shown in the figure, FIG. 4 is a diagram showing the recording pattern of tracks on a video floppy in an embodiment of the present invention, and FIG. 6 is a diagram showing the frequency allocation of a composite image signal recorded on a video floppy. FIG. 7 is a diagram showing the frequency allocation of a composite image signal recorded on a video floppy. A diagram for explaining the recording method for recording sampled signals, FIG. 8 is a diagram showing the frequency allocation of the recording signal in the recording method shown in FIG. 7, and FIG. 9 is a diagram for explaining the case where a luminance signal leaks. 10 and 11 are block diagrams of a PLL circuit in a reproducing apparatus as another embodiment of the present invention. In the figure. 1: Optical lens 2, 2 apertures 3: CCD 4: High frequency component detector 5: Process circuit 6: Recording signal processing circuit 7: Adding circuit 8:
Recording amplifier 9: Magnetic head lO: 5sG 11.12: BPF 13: CPU 20: Reproduction amplifier 2 Reproduction signal processing circuit 22: A/D converter
23: Image memory 24: D/A converter 25: Clock generator 26: Memory controller 27: Image processing circuit 2B, 34: B P F29.
35: Amplifier 30: 18 frequency divider: 11, 36: Phase comparator 32.37: L P F33: lb9 frequency divider 38: Pilot signal fTl detector 39: VCO 41: Phase shifter 40: y4 frequency divider Agent Patent Attorney 1) Haru Kitatake

Claims (2)

[Claims] (1) A device for recording an image signal composed of a luminance signal and a color information signal on a recording medium, the luminance signal frequency modulation means inputting the luminance signal, frequency modulating the input luminance signal, and outputting the resultant signal. a color information signal frequency modulation means for inputting a color information signal, frequency-biasing the input color information signal, and outputting the frequency-biased color information signal; and a frequency modulation means for frequency-modulating the color information signal output from the color information signal frequency modulation means. and a frequency band between the frequency band and the frequency band of the frequency-modulated luminance signal output from the luminance information signal frequency modulation means, and a first pilot signal having a first frequency; a pilot signal generating means for generating a second pilot signal having a higher frequency; a detecting means for inputting the luminance signal and detecting a frequency band of the input luminance signal; One of the first pilot signal and the second pilot signal is converted into a frequency-modulated color information signal output from the color information signal frequency modulation means and a frequency-modulated color information signal output from the luminance signal frequency modulation means. 1. An image signal recording device comprising a recording means for recording a luminance signal on a recording medium. (2) An image signal composed of a frequency-modulated luminance signal and a color information signal has a frequency band between the frequency band of the frequency-modulated luminance signal and the frequency band of the frequency-modulated color information signal. The apparatus reproduces the image signal from a recording medium on which either a first pilot signal having a certain first frequency or a second pilot signal having a higher frequency than the first pilot signal is recorded. a reproduction means for reproducing the image signal, a first pilot signal, or a second pilot signal from the recording medium and outputting each separately; and a storage means for storing the image signal output from the reproduction means. a first storage control signal forming means for controlling the storage operation of the image signal in the storage means using the first pilot signal output from the reproduction means; and a second pilot signal output from the reproduction means. a second storage control signal forming means for controlling the storage operation of the image signal in the storage means using the signal; An image signal reproducing apparatus comprising: storage operation control means for controlling storage operation in the storage means using either one of the second storage control signals.