JPS61199392A - Magnetic recording and reproducing system - Google Patents

Abstract

PURPOSE:To attain a time arrangement between three kinds of reproduction signals by so forming the titled device that the delay times of variable delay circuits provided in the transmission lines of the three kinds of reproduction signals obtained from the reproduction signals reproduced from N-pieces tracks, are variably controlled based on the signals obtained by respectively comparing the phases of the synchronous signals while referencing the synchronous signal in the reproduction signal from a specified track. CONSTITUTION:A reproduction luminous signal is delayed by a period of H/2, and the resulting delayed reproduction luminous signal is outputted to an output terminal 36 through a low pass filter for clock-pulse-frequency component removal 35, and also outputted to a horizontal-synchronizing-signal separating circuit 37. The second reproduction FM color difference components taken out from a band filter 40 is supplied respectively to a trap circuit 45 and a synchronous signal separating circuit 46. A phase comparator 51 respectively compares the reproduction horizontal synchronizing signal from a horizontal synchronizing-signal separating circuit 37 with that from the synchronous signal separating circuit 46 to generate a phase-differential voltage according to the phase difference, and supplies it to a voltage control oscillator (VCO) 52 as its control voltage in order to variably control the VCO's repetition frequency (oscillating frequency).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing device, in which three types of signals constituting a color video signal are respectively distributed in separate areas in the tape width direction using separate rotating heads. The present invention relates to a magnetic recording/reproducing device for reproducing the same.

2. Description of the Related Art Currently, helical scan type magnetic recording and reproducing devices (VTRs) that use 1/2 inch wide magnetic tape have a relatively narrow recording and reproducing band for home use, so the brightness is separated from the color video signal. Of the signal and the carrier color signal, the luminance signal is frequency-modulated to become a frequency-modulated wave, and the carrier color signal is converted to a low-frequency carrier color signal, which is then frequency-division multiplexed to the frequency-modulated iris signal. The system employs a so-called low-frequency conversion color recording and reproducing method that records multiplexed signals on magnetic tape and reproduces them.Also, in order to improve tape usage efficiency, the azimuth angle of each rotating head that records adjacent tracks is adjusted. A different guard panless recording method is used. On the other hand, in the case of commercial VTRs intended for broadcasting, especially VTRs with built-in cameras, the tape width is the same as that of home VTRs, with the aim of making the device smaller, converting it into a III, and improving the quality of the reproduced color video signal. A method is used in which luminance signals and color signals are recorded on separate tracks using separate rotating heads on magnetic tape, and a guard band is provided between adjacent tracks to record and play back the signals. .

FIGS. 12 and 13 respectively show track patterns recorded and formed by the above-mentioned conventional camera-integrated VTR. In FIG. 12, tracks 21, 22, and 23, which are inclined with respect to the longitudinal direction of the magnetic tape 1, are tracks on which frequency-modulated luminance signals (hereinafter referred to as FM luminance signals) are recorded, and tracks 3+, 32, . 33 are color difference signals ■.

This is a track on which first and second frequency-modulated color difference signals (hereinafter referred to as FM color difference signals) obtained by separately frequency modulating different carrier waves with Q are frequency-division multiplexed and recorded. Tracks 21 and 31 are tracks on which the FM luminance signal and FM color difference signal of the same field are recorded simultaneously and separately.
are tracks on which the FM luminance signal and FM color difference signal of the same field are recorded simultaneously and separately.

Furthermore, the plurality of rotating heads that record and form [-racks 21 to 23.3t to 33 all have the same azimuth angle,
A guard band (no signal recording zone) is formed between adjacent tracks. In addition, in FIG. 12, 41 and 42 are the first. An audio track in which the audio signal of the second channel is recorded, 5 a control track formed by a control head, and 6 a time code track formed by a time code head.

On the other hand, on the magnetic tape γ shown in FIG. 13, there are inclined tracks 8+, 82.9+, 92 and first . Audio tracks 101 and 102 of the second channel, a time code track 11, and a control track 12 are recorded, respectively. Recording tracks 81 and 82 are tracks in which FM luminance signals were recorded by a rotating head with an azimuth angle of -15°, and recording tracks 91 and 92 were tracks in which FM time-base compressed color difference signals were recorded by a rotating head with an azimuth angle of +15°. It's a truck. Here, the above FM
The time axis compressed color difference signals are color difference signals (R-Y) and (B-
After compressing the time axis of Y) to 1/2, they were time-division multiplexed alternately every H/2 (where H is the horizontal scanning period), and the carrier wave was frequency-modulated with this time-division multiplexed signal. It's a signal. The two first rotary heads with an azimuth angle of -15° and the two second rotary heads with an azimuth angle of +15° simultaneously control tracks 81 and 91, and
After recording separately, track 8 will be recorded in the next field.
Tracks 2 and 92 are recorded and formed simultaneously and separately, and thereafter, tracks are recorded and formed two by two in the same manner. Further tracks 8+, 82.9+.

A guard band is formed between two adjacent tracks of 92 to avoid mutual crosstalk.

In the color video signal recording and reproducing apparatus that forms either of the track patterns shown in FIGS. 12 and 13 above,
Since the luminance signal and the color difference signal are recorded on separate tracks and reproduced, the FM luminance signal and the low frequency conversion carrier color signal are simultaneously transmitted using the nonlinear transmission system in the VTR using the low frequency conversion color recording and reproducing method described above. Moiré, which occurs when recording and reproducing on the same track on a magnetic tape, does not occur, and the image recording and reproducing bands for the luminance signal and color difference signal can be made sufficiently wide, and the low-frequency conversion carrier color signal can be converted to FM. Since bias recording is not performed using a luminance signal, the S/N (signal-to-noise ratio) of the reproduced color difference signal can be improved, and as described above, the reproduced color video signal can be reproduced with higher image quality than a VTR using the low-frequency conversion color recording and reproduction method. 1 can be given.

Problems to be Solved by the Invention However, the above-mentioned conventional color video signal recording and reproducing apparatus has the following problems:
Since both have a guard band, the efficiency of magnetic tape usage is poor, and if the rotating head crosses the guard band and scans adjacent tracks during playback, two adjacent tracks will have an FM Since the luminance signal and the FM color difference signal are recorded separately in ff1e, the FM color difference signal (
or FM luminance signal), and there is no field correlation between the reproduced signals of both tracks.
It is not possible to use a crosstalk cancellation method that uses field correlation, such as that used in the above method, and there is also the problem that the reproduced image has noticeable crosstalk.

Furthermore, in the conventional color video signal recording and reproducing apparatus that forms the track pattern shown in FIG. There was also the problem that it caused a time difference.

Therefore, the present applicant previously proposed patent applications (2) and (3) (invention title: "Color video signal recording and reproducing device") filed on February 25, 1985. According to this proposed recording and reproducing apparatus, three types of signals constituting a color video signal are recorded on separate tracks in areas separated across the width of the tape, as shown in FIG. 5 or FIG. 10, which will be described later. Form, record, and play back. According to the color video signal recording and reproducing apparatus proposed by the applicant, since the plurality of tracks recorded simultaneously and separately are completely separated in the tape width direction, the reproduction of each track is difficult. Mutual interference between signals can be prevented, and all the problems of the conventional devices described above can be solved.

However, in the color video signal recording and reproducing device proposed by the present applicant, tension unevenness of the magnetic tape,
Because the signals reproduced from the magnetic tape include different amounts of time axis fluctuations in the tape width direction due to one-sided stretching, etc., there is a problem in that the time axis fluctuations cannot be completely removed.

Therefore, the present invention solves the above problems by inserting a synchronization signal that serves as a time reference into the signals recorded and reproduced on each track separated in the tape width direction, thereby providing a magnetic recording and reproducing device. The purpose is to

Means for Solving the Problems The magnetic recording/reproducing device according to the present invention has two sets of magnetic recording and reproducing devices each installed at substantially the same position on the rotating surface of a rotating body and at a height position corresponding to the upper part of the rotating body in the direction of the rotational axis. (where n is an integer of 2 or more), the three types of signals that make up the color video signal are recorded separately and simultaneously on n tracks separated from each other in the tape width direction. A device for reproducing, which includes a recording means for adding and recording a synchronization signal of a constant period to a signal that originally does not have a signal of a constant period among the signals supplied to the 0 set of rotary heads, and a recording means for recording the signal by adding a synchronization signal of a constant period, and an old translation from the reproduction signal. Minute sync signal! ! and time correction means. The time correction means compares the phase of one of the reproduction synchronization signals separated from the reproduction signals of zero tracks with other reproduction synchronization signals as a reference, and based on the comparison error signal. The time of the reproduction signals of the three keys obtained from the reproduction signals of 0 tracks is adjusted.

Since a synchronization signal is included in the signal reproduced from zero tracks separated in the tape width direction by n sets of rotating heads, a predetermined one track is reproduced behind this synchronization signal. Transmission of three types of reproduced signals obtained from the reproduced signals of 0 tracks, based on the signals obtained by phase comparison with the same signal in the reproduced signals of other tracks, using the synchronization signal in the signal as a reference. By variably controlling the delay time of the variable delay circuit provided in the path, the mutual time alignment of the three types of reproduced signals can be performed. Each embodiment of the present invention will be described below with reference to FIGS. 1 to 11.

Embodiment FIG. 1 shows a block system diagram of a first embodiment of the apparatus of the present invention. In the figure, a luminance signal 9, a color difference signal (R-Y) and a color difference signal <B-Y) are input to input terminals 15, 16 and 17, respectively, and emphasis circuits 18, 18 and 17 are respectively provided.
19 and 20. Here, the color difference signal (R-Y
) and (B-Y) are recorded on one track as will be described later, but originally they do not have a synchronization signal with a constant period. Therefore, in this embodiment, for the purpose of time correction, the synchronization signal generated by the synchronization signal generator 21 at a period of 11-1, for example, corresponding to the horizontal synchronization signal in the luminance signal is used as the color difference signal (B) from the input terminal 17. -Y) and supplied to the emphasis circuit 20 after tC. Emphasis circuit 1
8.19 and 20, a color difference signal (R
-Y) and color difference signal with synchronization signal added (8-Y)
are supplied to frequency modulators 22, 23 and 24 and frequency modulated, respectively.

FIG. 2(A) shows the FM taken out from the frequency modulator 22.
An example of the frequency spectrum of the i-degree signal is shown. In the same figure,
2 indicates the carrier wave shift band of 5 MHz to 6 MH7 of the FM luminance signal, and 2 indicates the lower sideband of the FM luminance signal. This FM luminance signal is supplied to the rotary heads Y1 and Y2 through a recording amplifier 25 and a rotary transformer (not shown), respectively.

On the other hand, from the frequency modulators 23 and 24, the first . 2nd FM
A color difference signal is extracted. FIG. 2(B) shows an example of the frequency spectrum of the first and second FM color difference signals. In Fig. 2 (B), ■ is the frequency spectrum of the first FM color difference signal obtained by frequency modulating the first carrier wave with the color difference signal (R-Y), and its carrier wave shift band 11c is 5MHz.
~6MHz is selected. On the other hand, ■ is the frequency spectrum of the second FM color difference signal obtained by frequency modulating the second carrier wave with the color difference signal (B-Y) to which the Domei signal is attached [t1], and the carrier wave shift band [VC is 0.8M1-1Z~
It has been selected as L2MHz. The first FM color difference signal taken out from the frequency modulator 23 and the second FM color difference signal taken out from the frequency modulator 24 are each supplied to a mixing circuit 26, where they are subjected to frequency division multiplexing. After that, the signals are supplied to the rotary heads C1 and C2 via a recording amplifier 27 and a rotary transformer (not shown), respectively.

Here, rotating head Y1. Y2. CI and C2 are attached and fixed to an upper rotating drum 63, which is an example of a rotating body, as shown in FIGS. In the same figure (A>, the motor shaft 61 of the motor 6o passes through the center of the lower fixed drum 62 and is fixed to the center of the cylindrical upper rotating drum 63, which is an example of a rotating body. Therefore, only the rotating drum 63 mentioned above is rotated by the motor 60.A tape guide 64 is provided on the lower fixed drum roller 2, and the lower end of the magnetic tape is guided along this tape guide 64, and the lower end of the magnetic tape is guided along the tape guide 64. It travels while being attached to the circumferential surfaces of the fixed drum 62 and the upper rotating drum 63 and being wound over an angular range of approximately 180 degrees.

As shown in the plan view of FIG. 3(B), the upper rotating drum 63 is equipped with first and second rotating heads Y1 and Y2 facing each other on the rotating surface of the upper rotating drum 63. A third and fourth rotary head C1 and C2 are attached. Also, as shown in FIG. 3 (△), the rotating heads Y1 and Y2 are at the same height position at the upper rotating drum 6.
Similarly, the rotary heads C1 and C2 are mounted at the same height position. Furthermore, FIG. 3(A).

As shown in (B), the rotary heads Y1 and C1 are mounted at different heights in the direction of the rotation axis of the upper rotary drum 63, and are mounted at approximately the same position on the rotating surface. This also applies between the rotary heads Y2 and C2. Moreover, the rotary head Y1. Y2. C1 and C
2 each have a gap of a predetermined azimuth angle, and the relationship between the head azimuth angle and the signal to be recorded is summarized as shown in the following table.

As a result, the first field is rotary head Y1.
and C1, one herb TYI and Tc shown in FIG.
+ are simultaneously and separately recorded on the magnetic tape 28, and the next field is recorded by the rotary heads Y2 and C.
2, tracks TY2 and Te3 are recorded simultaneously and separately. Below, in the same way as above,
Rotating heads Y1 and C1 and Y2 and C for each field
2, a pair of tracks alternately T v 31TC
3→TY4. TC4→Tys, Tcs→100
Records are formed sequentially in this order without guard bands.

In this way, tracks TYI to TY10 record the FM luminance signal with the frequency spectrum shown in FIG. 2 (Δ), and tracks Tc+ to Tera record the FM brightness signal with the frequency spectrum shown in FIG. and a second FM color difference signal are recorded.

Further, horizontal synchronizing signal recording portions and tracks Tc+ to Tc+ are recorded on tracks TYI to TYIO.

The synchronization signal portion recorded on the track pattern is as shown with a solid line in FIG. 5, which is a partially enlarged view of the track pattern in FIG.
They are recorded in alignment in the track width direction (so-called H alignment recording).

Also, in FIG. 4, tracks 66+ and 662 are recorded and formed along the longitudinal direction of the magnetic chip 728.

67 and 68 are tracks recorded and formed by a dedicated fixed head, and 66+ and 662 are the first . Audio track 6 on which the second channel audio signal is recorded
7 is a time code track in which a time code for knowing position information on the tape is recorded, and 68 is a control track in which control pulses of a constant period are recorded.

Next, to explain the operation during reproduction, the recording tracks TYI to TYIO on the magnetic chip 128 are alternately scanned field by field by the rotary heads Y1 and Y2, and after the previously recorded FM luminance signal is reproduced, the rotary Trance,
The signal is supplied to the FM demodulator 30 through a switch circuit (not shown) for converting the signal into a continuous signal and a reproducing preamplifier 29 shown in FIG. Meanwhile, at the same time, the recording track Tc+"Tc++ on the magnetic tape 28 is recorded by the rotating head C.
1 and C2 are alternately scanned every field, and the recorded frequency division multiplexed signal is reproduced. This reproduced frequency division multiplexed signal is supplied to bandpass filters 39 and 40, respectively, through a rotary transformer, a switch circuit for converting a continuous signal (all not shown), and a reproduction preamplifier 38, where the first and second FM color difference The signal is transmitted to 111 houses each.

The reproduced luminance signal obtained by FM demodulation by the FM demodulator 30 is sent to a de-emphasis circuit 31. Low pass filter 32
Charge Coupled Device (COD)
) 33. The C0D 33 is supplied with a clock pulse of, for example, 14.3 MHz from the clock pulse generator 34, and delays the input reproduced luminance signal by a period of H/2.
The delayed reproduced luminance signal is outputted to an output terminal 36 through a low-pass filter 35 for removing clock pulse frequency components, and is also outputted to a horizontal synchronizing signal separation circuit 37.

On the other hand, the reproduced first F extracted from the three bandpass filters
The M color difference signal is supplied to an FM demodulator 44, and the reproduced second FM color difference signal extracted from the bandpass filter 40 is supplied to a trap circuit 45 and a synchronization signal separation circuit 46, respectively. The reproduced FM color difference signal from which the synchronizing signal portion has been removed by the trap circuit /1.5 is supplied to the FM demodulator 47. As a result, the reproduced color difference signals (R-Y) and (B-Y) are respectively taken out from the FM demodulators 41.47, and are converted to C0D44.50 through the de-emphasis circuits 42.48 and low-pass filters 43°49, respectively. Supplied.

CCDs 44 and 50 constitute a variable delay circuit. Further, the synchronization signal separation circuit 46 performs FM demodulation on the reproduced second FM color difference signal, and then separates and extracts the synchronization signal portion added to the reproduced color difference signal (B-Y).
Supply to 1. The phase comparator 51 receives the reproduced horizontal synchronization signal from the horizontal synchronization signal separation circuit 37 and the synchronization signal separation circuit 46.
A phase error voltage is generated according to the phase difference, and a voltage controlled oscillator (Co
) 52 as a control voltage to variably control the repetition frequency (oscillation frequency) of its output pulses.

The output pulses of the VCO 52 are supplied to the CCDs 44 and 50, respectively, as clock pulses. Since the CCDs 44 and 50 delay and output the input signal by a time determined by the product of the number of stages and the period of the clock pulse, the delay time can be variably controlled in inverse proportion to the repetition frequency of the output pulse of the VCO 52. Become. Here, in the phase comparator 51, based on the reproduced horizontal synchronizing signal obtained from the reproduced signals of tracks Ty+ to Ty+o, track dc1
~The phase difference (i.e., time difference) between the reproduced synchronization signal obtained from the reproduced signal of TCIG is detected, and the delay time of CCD 44 and 5o is changed by the phase error voltage, so that the manually reproduced color difference signal of CCD 44 and 50 is detected. (RY) and (B-Y) are delayed () by the CCDs 44 and 50, respectively, which is the time required for time alignment with the reproduced luminance signal. The reproduced color difference signals (R, -Y) and (B-Y) taken out from the CCDs 44 and 5o are output to output terminals 55 and 56 through low-pass filters 53 and 54 for removing clock pulse frequency components. The signal may be added to the color difference signal (RY), or may be added to both color difference signals, respectively.

Next, the second embodiment of the device of the present invention will be explained.
The figure shows a block system diagram of a recording system of a second embodiment of the apparatus of the present invention. In the figure, the red (R), green (G) and blue (B) primary color signals input to the input terminals 70, 71 and 72, respectively, are as follows:
The signals are respectively supplied to an encoder 73 and converted into a luminance signal and two types of color difference signals (for example, RY and BY). The luminance signal as shown in FIG. 7 (A>) taken out from the encoder 73 passes through an automatic gain control circuit (AGC circuit) 74, a low-pass filter 75, an emphasis circuit 76, and a white/dark clip circuit 77, and is then sent to a frequency modulator 78. On the other hand, two types of color difference signals (B-Y) are extracted from the encoder 73.

(RY) are supplied to the synchronization signal adder 81.82 through the AGC circuit 79.80, where the synchronization signal from the synchronization signal generator 83 is applied to the position corresponding to the horizontal synchronization signal in the luminance signal. will be added.

As a result, the synchronizing signal adder 81 extracts the color difference signal <B-Y) to which the synchronizing signals b1 and b2 have been added, as shown in FIG. 7(B), and the low-pass filter 84... The signal is supplied to a frequency modulator 87 through an emphasis circuit 85 and a white/dark clip circuit 86, respectively. At the same time, the color difference signal (R-Y), which is taken out from the synchronization signal adder 82 and to which synchronization signals Cl, C, and 2 have been added as shown in FIG. Emphasis circuit 89. and is supplied to a frequency modulator 91 through a white/dark clip circuit 90, respectively.

As shown in FIG. 8 (A>), an FM luminance signal with a carrier wave shift band of 5 MHz to 6 MHz is taken out from the frequency modulator 78 and then passed through a high-pass filter 92, a recording amplifier 93, and rotary transformers 941 and 942, respectively. On the other hand, as shown in FIG. 8(B), the carrier wave shift band VTc is 3.5 MHz to 5 MHz from the frequency modulator 87, and Wave band Vlu.

A first FM color difference signal having a lower sideband VIL is retrieved. In addition, as shown in FIG. 8(C), the frequency modulator 91 outputs a carrier wave shift band ■C of 3.5 MHz to 5 MHz.
Then, a second FM color difference signal having an upper sideband ■U and a lower sideband ■L is extracted. The first and second FM color difference signals are passed through a bandpass filter 95.96 to a mixing circuit 97.9.
8.

On the other hand, the audio signals of the first and second channels that have entered the input terminals 99 and 100 are sent to the noise reduction circuits 101 and 101, respectively.
102. Emphasis circuits 103, 104, frequency modulators 105, 106. The signals are supplied to mixing circuits 97 and 98 through bandpass filters 107 and 108, respectively. This results in
The frequency spectrum of the output signal of the mixing circuit 97 is as shown in FIG.
A frequency division multiplexed signal with the iJ voice signal is extracted and sent to a recording amplifier 109. Rotary transformer 110+.

1102 to the third and fourth rotating heads 1''3 and H
4, respectively. Further, from the mixing circuit 98, the eighth
A frequency division multiplexed signal of the second FM color difference signal of the frequency spectrum shown by ■ in Figure (C) and the FM audio signal of the second channel of the frequency spectrum shown by IX in Figure (C) is extracted, and the recording amplifier 111. Rotary transformer 112+.

1122 to the fifth and sixth rotary heads H5 and H6, respectively.

The first to sixth rotating heads H1 to H6 are connected to a rotating drum 1 as shown in FIGS. 9A and 9B, as disclosed in the color video signal recording and reproducing apparatus proposed by the applicant.
It is attached to 13.

In FIGS. 9A and 9B, the same components as those in FIGS. 3A and 3B are designated by the same reference numerals, and their explanations will be omitted. As can be seen from FIGS. 9(Δ) and (B), the rotating heads H1 and H2, H3 and H4 are placed on the rotating surface of the upper rotating drum 113.
. H4 and H6 are also aligned in the direction of the rotation axis and mounted at different height positions. In addition, rotating heads H1, H2°H3, H4, H5
and H6 each have a gap of a predetermined azimuth angle, and the relationship between the head azimuth angle and the signal to be recorded is summarized as shown in the following table.

The rotary heads H1 to H6 having the above configuration form tracks Tn to T18 on the magnetic tape 115 shown in FIG. 10 in three regions separated in the tape width direction, tLWa, Wb, and Wc, tilted by an angle of 0 and without guard bands. ．． T21~T2
8. T31 to Tz are formed, respectively.

Here, the tracks T u to T ta are the first tracks recorded and formed by the rotary heads H1 and H2, and the tracks T21 to T2B are the second tracks recorded and formed by the rotary heads H3 and H4, and the trunk T 31 ~ Ding: (
8 is the third record formed by the rotary heads H5 and H6.
This is a truck. Further, in the first to third tracks, one horizontal cycle signal or one synchronizing signal is recorded. Furthermore, for example, at the upper end of the 1/2 inch wide magnetic tape 115 are audio tracks 1161 and 116 on which audio signals of the first and second channels are recorded, respectively, by a fixed audio head along the longitudinal direction of the tape.
On the other hand, at the bottom end there is a time code track 117 in which a time code for knowing the position information on the tape is recorded by a fixed time code head, and a control pulse of a fixed period is recorded by a fixed control head. control tracks 118 on which are recorded are formed parallel to each other along the longitudinal direction of the tape.

Next, the reproduction system of the second embodiment of the present invention will be explained with reference to the block system diagram shown in FIG. 11. In the figure, the same components as in FIG. 6 are designated by the same reference numerals. Rotating head H1
The FM luminance signals sequentially reproduced from the first tracks II to T+6 by 1 and 2 are supplied to the FM demodulator 121 through a preamplifier 120, where they are converted into reproduced luminance signals, and then further passed through a low-pass filter. 122. CC through a de-emphasis circuit 123 and a low-pass filter 124, respectively.
D125, where the clock pulse generator 12
A clock pulse of, for example, 14.3 MHz from 6 is delayed by a period of, for example, H/2. The reproduced luminance signal extracted from the CCD 125 after being delayed by a fixed delay time H/2 is passed through a low-pass filter 127 to the decoder 12.
8, the horizontal synchronizing signal is separated by the horizontal synchronizing signal separation circuit 129, and then the horizontal synchronizing signal is separated by the phase comparator 130 and 1.
31 as reference signals.

On the other hand, the second track T is rotated by the rotary heads H3 and H4.
The first frequency division multiplexed signal sequentially reproduced from T21 to T2B is sent to the rotary transformer 110+.

1102, bandpass filter 1 through preamplifier 132
33 and 134, respectively, and the first FM color difference signal and the FM audio signal of the first channel having the frequency spectra v■ and ■ shown in FIG. 8(B) are separated into P waves. Similarly, the third track T3 is rotated by the rotary heads H5 and H6.
The second frequency division multiplexed signal sequentially reproduced from 1 to 738 is transmitted through rotary transformers 112+ and 1122.
and a preamplifier 135 to bandpass filters 136 and 137, respectively, where the second FM color difference signal and the second
The FM audio signals of each channel are separated into P waves. The first filters extracted from bandpass filters 134 and 137, respectively
And the reproduced FM audio signal of the second channel is FMtim.
Vessels 138 and 139. De-emphasis circuits 140 and 141. The signals are output via the noise reduction circuits 142 and 143 to output terminals '144 and 145 as a first channel reproduced audio signal and a second channel reproduced audio signal.

On the other hand, the first and second reproduced FM color difference signals extracted from bandpass filters 133 and 136 are transmitted to FM demodulators 146 and 147 . Low pass filters 148 and 149. The signals are supplied to CCDs 154 and 155 through de-emphasis circuits 150 and 151 and low-pass filters 152 and 153, respectively. The CCDs 154 and 155 constitute a variable delay circuit whose delay time is controlled inversely to the repetition frequency of clock pulses supplied from VCOs 156 and 157, which will be described later. While delaying the signal and outputting it through low-pass filters 158 and 159 to synchronous signal separation circuits 160 and 161,
are supplied to decoders 128, respectively. As a result, the synchronization signal separation circuit 160 extracts the reproduced color difference signal (B-Y) as shown in FIG.
The synchronization signal b1. shown in B). After separating and extracting b2, it is output to the phase comparator 130. As a result, the phase comparator 13
0 is the first track T++"T+a and the second track T
A phase error voltage corresponding to the time difference between the two regenerative signals of 2+-T28 is generated and supplied to Vc○156, and the repetition frequency of the output clock pulse is variably controlled.
The output reproduced color difference signal (B-Y) is controlled so as to temporally coincide with the reproduced luminance signal.

The synchronization signal separation circuit 161 also outputs a reproduced color difference signal (R-Y
) The synchronizing signals C+ and C2 shown in FIG. 7(C) are separated and extracted and then output to the phase comparator 131, where the phase is compared with the reproduced horizontal synchronizing signal. Output j of phase comparator 131
The phase error voltage indicates the relative time difference between the reproduced signals of the first track T u~T +s and the third track T 31~Ti, and is supplied to the VCO 15'7 to repeat its clock pulses. Variable frequency control. As a result, the delay time of the CCD 155 is
It is variably controlled so as to output a reproduced color difference signal (R-Y) that temporally coincides with the output reproduced luminance signal of No. 7.

In this way, the reproduced color difference signals (B-Y) and (RY) to which delay time has been added for time alignment with the reproduced luminance signal by COD''+54 and 155 are sent to the decoder 128 at the reproduced luminance signal. It is supplied with the signal and is converted into the three primary color signals and then output to the output terminals 162, 163 and 14.
Each is output separately to

As described above, according to the first and second embodiments, among the respective reproduction signals reproduced from tracks recorded in mutually different areas in the tape width direction, reproduction is performed from the remaining tracks based on the reproduction luminance signal. Since the time is aligned with the reproduced color difference signal, even if the amount of time axis fluctuation differs in the tape width direction, the relative deviation in time axis fluctuation can be removed.

Note that in each of the above embodiments, the audio tracks 66+, 662, +62+, 162
Audio signal recording and reproducing system for recording and reproducing □, time code recording and reproducing system for recording and reproducing time code track 67.117, control track 68.118
Since the control signal recording and reproducing system, servo system, etc. for recording and reproducing the information are not directly related to the gist of the present invention, illustrations and explanations thereof are omitted.

It should be noted that the present invention is not limited to the above embodiments, but also includes various other modifications. for example,
■ as the first and second color difference signals.

A Q signal may be used, and two types of color difference signals processed by time division multiplexing instead of frequency division multiplexing may be recorded and reproduced. Further, the signals recorded and reproduced by the rotary heads C1 and C2 may be any color signal, for example, a multiplexed signal such as a low frequency conversion carrier color signal and a bias signal, or a signal obtained by frequency modulating a carrier wave with a low frequency conversion carrier color signal. An FM low frequency conversion carrier color signal, an FM line sequential color difference signal, or a multiplexed signal of three types of FM signals obtained by frequency modulating the three primary color signals separately may be used. Furthermore, the signals recorded and reproduced by the rotary heads H1 to H6 may be any of the three types of signals that make up the color video signal, so the three types of signals that are obtained by separately frequency modulating the three primary color signals are sufficient.
It may also be a FM primary color signal.

Furthermore, rotating head 01. C2, Yl, Y2. or H1~H
The rotating body to which the rotor 6 is attached may have a configuration in which flat square head bars are arranged in two or three upper and lower stages. Furthermore, the rotating heads C1, C2, Yl, Y2 . H1
~H6 may form a track pattern with a guard band at the same azimuth angle, and the rotating head Y1
and C1, between Y2 and C2, Hl, H3 and H5
The azimuth angles between H2, H4 and l-16 do not have to be selected to be the same.

Effects of the Invention As described above, according to the present invention, among the signals recorded on a plurality of tracks that are separated from each other in the tape width direction and recorded at the same time, signals that originally include a horizontal synchronizing signal are recorded. A synchronization signal is added to the signal that has not been recorded, and this same signal is discriminated and separated during playback. Based on the error signal obtained by comparing the phases of the playback synchronization signals, the difference between the playback signals of each track is determined. Since the mutual time difference between the two is minimized, the above-mentioned multiple times played separately and simultaneously due to tape tension unevenness or tape distortion (unilateral elongation, etc.) caused by tape tension, tape elongation due to temperature effects, etc. Even if the time axis fluctuations of the playback signals of book tracks are different from each other, the mutual time alignment between the playback signals can be automatically performed, thereby enabling the recording and playback of higher quality color video signals, etc. It has the following features.

[Brief explanation of drawings]

FIG. 1 is a block system diagram showing a first embodiment of the device of the present invention, FIG. 2 is a diagram showing an example of the frequency spectrum of the signals of each main part in the block system shown in FIG. 1, and FIG. Rotating head of the device! 4 is a front view and a plan view showing a first embodiment of the li device, etc.; FIG. 4 is a diagram showing a first embodiment of a track pattern recorded and reproduced by the apparatus of the present invention; 6 is a block system diagram showing the recording system of the second embodiment of the apparatus of the present invention; FIG. 7 is a signal waveform diagram for explaining the operation of the block system shown in FIG. 6; Figure 8 shows an example of the frequency spectrum of the signals of each main part in the block system shown in Figure 6.
FIG. 9 is a front view and a plan view showing a second embodiment of the rotary head arrangement of the apparatus of the present invention, and FIG. 10 shows a second embodiment of the track pattern recorded and reproduced by the apparatus of the present invention. 11 is a block system diagram showing a reproduction system of the second embodiment of the apparatus of the present invention, and FIGS.
The figure shows eight examples of track patterns recorded and formed by conventional apparatuses. 1.7.28, 115... Magnetic tape, 15... Luminance signal input terminal, 16.17... Color difference signal input terminal,
21...Synchronization signal generator, 22-24,78°ε3
7.91, 105.106...Frequency modulator:,"
,0.41.47.121,146,147...Fj
ν1 compound'iJ4 device, 33, 44, 50.125, 154
゜】155...Charge coupled device (C
CDl 34,126...Clock pulse generator, 3
6... Reproduction luminance signal output terminal, 37,129... Horizontal synchronization signal separation circuit, 39.40... Bandpass filter,
45...Trap circuit, 46,160.161...
Synchronous signal separation circuit, 51, 130.131... Phase comparator, 52, 156, 157... Voltage controlled oscillator <V
CO), 55.56... Reproduction color difference signal output terminal, 60.
... Motor, 63,113 ... Upper rotating drum, 70
~72...Primary color signal input terminal, 73...Encoder,
81.82... Synchronization signal generator, 83... Synchronization signal generator, 133, 136... Bandpass filter for separating reproduced FM color difference signals, 134.137... Bandpass filter for separating reproduced FM audio signals, 128 ...Decoder, 162-1
64... Reproduction primary color signal output terminal, Yl. Y2. C1, C2, 1-11 to H6...Rotating head. Patent applicant Victor Company of Japan Co., Ltd. Figure 2, Figure 7, Figure 8 □ □ Frequency iAl,, 113 Figure 9 fiO diagram

Claims (3)

[Claims] (1) A set of two rotary heads installed at the same height at opposing positions on the rotating surface of a rotary body around which a running magnetic tape is wound over an angular range of approximately 180°; n sets (where n is an integer of 2 or more) of rotating heads are installed at approximately the same position on the rotating surface of the rotating body and at different height positions in the direction of the rotating axis of the rotating body, and are arranged to generate color video signals. A magnetic recording and reproducing apparatus that records three types of signals constituting the magnetic tape separately and simultaneously on n tracks separated from each other in the tape width direction by the n sets of rotary heads on the magnetic tape, and reproduces the same. means for adding and recording a periodic signal of a constant period to a signal that originally does not have a signal of a constant period among the signals supplied to the n sets of rotary heads; means for separating the synchronization signal from the signals respectively reproduced from the book tracks;
The phase of one of the reproduction synchronization signals separated from the reproduction signals of the n tracks by the separating means is compared with the other reproduction synchronization signals as a reference, and the phase of the reproduction synchronization signal is compared with each other based on the comparison error signal. A magnetic recording/reproducing apparatus comprising: time correction means for time-aligning the three types of reproduction signals obtained from reproduction signals of n tracks. (2) The three types of signals are a luminance signal and two types of color difference signals, and the n sets of rotating heads record and reproduce frequency-modulated luminance signals obtained by frequency modulating the luminance signals. a first frequency modulated wave signal obtained by frequency modulating a first carrier wave with a first color difference signal; and a second frequency modulated wave signal obtained by frequency modulating a second carrier wave with a second color difference signal. and another set of rotary heads for recording and reproducing a frequency division multiplexed signal with a frequency modulated wave signal, and the periodic signal adding means adds the periodic signal to one or both of the first and second color difference signals. The synchronizing signal separating means is configured to separate and output a reproduced horizontal synchronizing signal from the reproduced luminance signal and to separate the synchronizing signal in the reproduced first or second color difference signal. Claim 1 characterized in that
The magnetic recording and reproducing device described in . (3) The three types of signals are a luminance signal and two types of color difference signals, or three primary color signals, and the n sets of rotary heads are three sets of rotary heads that separately record and reproduce the three types of signals. , the magnetic recording and reproducing apparatus according to claim 1, wherein the synchronization signal adding means is means for adding the synchronization signal to each of the two types of color difference signals or to each of the three primary color signals. .