JPS59171388A - Dubbing device of color video signal - Google Patents

Abstract

PURPOSE:To improve the reproducing picture quality without deteriorating frequency and pulse characteristics or the like by recording a regenerated time division multiplex signal where a synchronizing signal and the discriminating signal of two kinds of color difference signals are waveform-shaped again respectively while keeping the time division multiplex signal structure of the timeplex system as it is. CONSTITUTION:When a color video signal is incoming to an input terminal 1, a discriminating burst signal is superimposed on a horizontal synchronizing signal at each 1H (=64mus) from a discriminating burst signal addition circuit 18, and further the horizontal synchronizing signal, a color reference level (DC level of achromatic part of a negative color difference signal), one of time axis compression color difference signals (R-Y)c and (B-Y)c and a time axis compression luminance signal are applied with time division multiplex respectively, and a time division multiplex signal transmitted in the line sequential way is extracted from the time axis compression color difference signal. This time division multiplex signal is applied to a recording head 25 via a pre-emphasis circuit 19, a clip circuit 20 of white peak level, a clamp 21, an FM modulator 22, a high pass filter 23 and a recording amplifier 24 and recorded on a magnetic tape 26.

Description

[Detailed description of the invention]

Fields of Application of Recent Work-1- The present invention relates to a color image (M-moon lipping device, in particular, the time axis of the chromatic image 3 and the line-sequential color-difference image are compressed in their time axes, and this 4). This relates to a device for reproducing a signal obtained by time division Φ from a recording medium and copying and recording it on another recording medium (dubbing).Prior art Recent conductor technology, precision processing technology With the rapid progress and development of small parts technology, it has become possible to make recording devices smaller and lighter. In order to reduce the size and weight of the device, reducing the diameter of the drum has a major effect, and in order to secure the recording time required for the small size and weight, it is necessary to increase the traveling speed of the drum. In order to obtain high image quality in such a compact and lightweight recording and reproducing device, a new recording and reproducing method other than the current low frequency conversion recording and reproducing method is required. ·)is. Therefore, in order to meet the above requirements, various recording methods,
(Although it has been proposed, in the middle of the day, the color X signal of 2H is blinded by 1 forward color A1, the wing is FM demodulated L) and the time axis 11 is; 7"j'b time axis!", these signals are time-division multiplexed, (2 time divisions) 11 multiplexed signals are frequency modulated and recorded on a recording medium. Perform reverse signal processing <' t)
Re-11 output of the color video signal of formula 1 to the mark (F
There are some recording/reproducing apparatuses having a certain configuration (for example, see Japanese Patent Application Laid-open No. 926/1993). For this record (1
1rt is the difference between both the luminance signal and color difference signal H bands.
II g, .;1 is a narrow h signal f,'+
, differential signal V] is transmitted within the period 11-1 so that it is possible to transmit the h of the horizontal blanking signal il1 within the horizontal blanking interval il1.
The time axis of the color difference signal is reduced to about 20% of the 11-1 period, and 1. ：Band utilization from fish such as ``to brightness signal'') - C is the time axis - C occupies the same band as the color reduction signal J, uni 111 The time period is approximately 80% of the 111 period. The axis C1 is transmitted in a time-division multiplexed manner as a line-sequential signal that is transmitted to the axis C1 (1 t-1fi for the two color difference A) and the line-sequential signal transmitted to the intersecting axis C1, which is time-division multiplexed f2. M modulator, and this [-M modulator output signal) signal is sent to the magnetic j
--Based on the recording and reproducing method (hereinafter referred to as the time-plex method) for obtaining C-color video signals, which performs signal processing reverse to that during recording during playback. A timeplex 17 transmits such time division multiplexed signals.
According to the formula, there is no period during which the luminance signal and the color difference signal are transmitted simultaneously.The luminance signal and the carrier chrominance signal are transmitted by band-wise multiplexing, as in the case of NTSC and PAL color video signals. There is no mutual interference or moiré between the luminance signal and the color difference signal, which may occur in some cases, and it is compatible with NTSC, P△1 one-way, and SFCAM systems.
In any case, even if a B-type color video signal is recorded and reproduced by a recording/reproducing device using the azimuth recording/reproducing method on tracks that are not arranged in the same order, the time-division multiplexed signal will be affected by the azimuth loss effect on adjacent tracks. Since the high-frequency carrier wave is frequency-modulated and recorded in the form of a 1η = frequency-modulated wave signal, almost no crosstalk occurs due to the azimuth loss effect, and the above-mentioned crosstalk countermeasures are not effective. - Provides high-quality playback image quality. . In addition, the above time axis 1 in the timeplex direction 1 () - "condensed general signal and time i1'llll 11 condensed (!2
Difference A1 - The bow is both in the low frequency band. - The energy distribution is I) where the energy is human C and the T energy is small in the high frequency band, which is suitable for frequency modulation. ), it is possible to obtain a large modulation index and greatly improve the S/N, and when the time axis is further extended, I'I
It is possible to completely eliminate all axis fluctuations between raw time and raw time.
Therefore, it is possible to significantly improve the playback image quality compared to the current low-frequency conversion recording and playback system.When dubbing time-division multiplexed signals based on the timeplex system, two recording and playback devices are required. First, use one of the devices to record the time-division multiplexed signal using the time-plex method with frequency modulation.
Reproducing a general recording medium (e.g. magnetic j-p),
Then, the obtained reproduced frequency modulated time division multiplexed signal is passed through 11 raw signal processing systems such as [M demodulator 1 time axis expansion circuit, encoder], etc. The signal is then converted into a color video signal and then supplied to the other recording/reproducing device. Usage record 1
1st grade 'A! ! ? (This is the beef cattle standard method) Jra video signal is used before r! A frequency-modulated time-division multiplexed signal is generated through a recorder signal processing system having an L configuration, and this signal is transmitted.
Dubbing was performed by recording the image on another unrecorded recording medium. Problems to be Solved by the Invention However, when dubbing (
Recording system, playback system, and so on of the recording/playback device
1 recording book (1 unit [14 unrecorded after passing through N recording systems)]
A 1M modulator, an FM demodulator, and a 1M modulator and an FM demodulator have to be recorded in Achiej, so they pass through a time-axis compression system and a time-axis expansion system, respectively, and the frequency characteristics are There is a problem in that the fI, pulse characteristics, linearity, etc. deteriorate, resulting in deterioration in the image quality of the dubbed color video signal. Therefore, the present invention does not return to the standard color video signal, but instead maintains the time-plex time division element 8 simplex configuration, and reproduces the Domei signal and the two types of color difference signals by reshaping them respectively. To provide a dubbing device for color video signals which solves the above problems by recording time-division multiplexed signals. In this case, two types of time-axis pressure line chroma signals intersect lj at any time during one horizontal scanning period, and the time-axis compressed color difference signal of - within one water-type scanning period becomes a horizontal isobright signal and a time-axis compressed luminance signal. The time-division multiplexed signal, which is extensively time-division multiplexed with the signal and discriminates two types of color difference signals, is frequency-modulated and Re-recorded (according to the recorded information on the recording medium). A reproducing means for regenerating the green signal and then demodulating it to 1M to reproduce time division multiplexed signals; The replacement means J and the +lr raw time-division multiplexed signal which are extracted are frequency-modulated [M modulator and , the output signal of the M modulator is recorded on an unrecorded recording medium (hereinafter referred to as one embodiment).
This will be explained with reference to C drawings. Embodiment FIG. 1 shows a block system diagram of a recording and reproducing apparatus having an embodiment of the present invention apparatus ff (here C' is a car included in the present invention) - an image display system. A viewing device is composed of two recording and reproducing devices, a part of the reproducing system of one of the recording and reproducing devices, and a part of the recording system of the other recording and reproducing device. For convenience of illustration, FIG. 1 assumes that two dubbing devices are included in one recording/reproducing device. First, we will explain the recording operation of standard T%I type color video signals by the recording and reproducing apparatus. (For example, the waveform as shown in A>S)E CA
The M system color video signal 1 (this is a composite video signal) is supplied to the low-pass filter 33 through the switch circuit 2 connected to the terminal R side, where the luminance signal is separated. It is supplied to the dining room 4. The decoder 4 extracts the carrier color signal, which is a frequency modulated wave, from the SECAM Buno type color video signal 63 using a bandpass filter (not shown), and filters it through a bell filter and an FM
The four color difference signals (R
-Y)do1-Y) and l)\intersectiontno(92]1-1 every (
, shown in Figure 2 (13), which is synthesized in two time series.
A line-sequential color difference signal like this is obtained. This line-sequential color difference signal is transmitted to 4 and 9fI S in the backboard in the 111 light room where the color difference signal <B-Y) is transmitted.
DC level l) 1 of the achromatic color part (non-modulated 11191 part) of the width, and the achromatic color of 4.9 μs width in the backboard in the next 11-1 light area where the color difference signal (-Y at l) is transmitted. There is a certain value difference from the DC level b2 of the non-modulated carrier portion. This means that the color subcarrier frequency of the carrier color signal is i 4,25 Ml-IZ in the transmission line of the color difference signal '74 (13-Y), and the color difference 1C (R-
This is because the transmission line of Y) is 4,406MlIZ. This line-sequential color difference signal is subjected to a DC level adjustment so that the DC level of the achromatic color part of the -h color difference signal matches that of the other color difference signal, and then passed through the switch circuit 13 to the ΔF) converter 1/1. supplied to On the other hand, from the low-pass filter 3, a luminance signal separated from the human-powered SfCAM color image signal 1'1' is taken 111, and this luminance signal is separated and extracted by the separation circuit 6. On the other hand, △[) converter 5
After being digitally converted,
Random Acres Messuri ([M△M) People are supplied to 8 and 9. ] to the ['ll signal generator 7 is supplied with the signal from the synchronization separation circuit 6, and is also supplied with the rectangular waveform as a color difference signal discrimination pulse, △[
]Converters 5, 14. f) Supply the control pulses generated by the user to the A converter 11.16, generate 6 (: 1 η width of water) 7 synchronous signals 8 and various pulses, and further R
Write clock and read to AM8.9 and 15

[Tsuku [-] Tsuku is generated at a predetermined timing and at a predetermined repetition rate of 1, with an output of 4 and 3 degrees, -1
The luminance generator 7 supplies, for example, an 8 MHz (D write clock pulse) to one of the RAMs 8 and 9, and outputs a luminance signal of 11-1 minutes transmitted during a video period of 52 μs'f to one of the RAMs 8 and 9 (J). At the same time, for example, 10M Lly, the readout D-tsuku pulse is applied between 1+-+++ and u, and the time axis of 4-11 synchronization signal 4'-1! IF color reduction 14-(
This is a period excluding the serial transmission period of (J, 11-1 minutes (52Ils)), which is supplied to 1gΔM of (ll!/J) and - (the other f '<
Read out the 111 minutes of brightness signal stored in AM and stored in C11-1 1! 1, this [8M8 and 9 read-out function '1 and 7■) inserting movement '1 and 1 l-1O
The switching circuit 10 on the output side of the master AMs 8 and 9 outputs the 21-ton pulses from the pulse generator 7, ','] The read operation can be switched so that the output signals 1':4 of RAM 8 or 9 on the side connected to row 4 are selectively output.
-, from the switch circuit 10 at 4, /5 time iht+
11 The reduced luminance signal is missing information Q < Fig. 2 (1
) is intermittently taken out (\). This sweat, \ axis 1-scaled luminance signal is converted to [) by the converter 11, and then converted to the switch circuit 12. On the other hand, the line sequential color difference signal outputted from the switch circuit 13 is converted into digital data by the A/D converter 14.
Supplied. 1F (8 M 1 5 +4.
IH (・64#S) 1 person “C River. 1!] 2
The line sequential color difference signal transmitted during the video period of μS is −1
Roll pulse generator to channel 1; e.g. 2MH from f ear
Write with the write eye pulse of z, wait for a certain period of time (for example 1.6/ls > after the completion of the size insertion, then apply the read eye pulse of 10 MHz, for example.)
The time is compressed to 15 and the color code is read out.
=i-<Therefore, one read period is 10.4 μs and 4
2(C), and a waveform as shown in FIG. 2(2) extracted from the li A converter 11. and the water '77 synchronous signal g with a width of about 4 tIS extracted as shown in FIG. The output of the switch circuit 12 is time-division multiplexed based on the output of the switch circuit 12. This is supplied to
Based on the -0- pulse, a burst signal (for discrimination) is added based on the pulse 1 to signal 13-8 for discrimination. color
No. 18 (B-Y) Doku [De-Yl no Den] Discriminates the X line and floods the K-th burst signal, for example, about 1.5MH7
The single-frequency Kaiyang of the color difference signal (II-Y) and ((<
-Y) color difference signal 5-U(here-(・ is 1
2(f) 1. ,
□ - Indication - When the horizontal synchronizing signal is issued, [one occurrence corresponding to the period, \rero. This J is shown in Figure 2 (A) and Figure 3 (△).
When the M system color video signal is received, the discrimination burst signal is outputted from the I/1 addition circuit 18, as shown in Fig. 3 (13), horizontally synchronized at f0 every IH (-64 μs). A discrimination burst signal is superimposed on the signal, and a horizontal synchronization signal, color base tiL level (DC 1 novel of the achromatic color part of the - color X- signal) and time axis F [line color difference signal (RY)
c or (B-Y)c and the time-axis IF condensed 1 mark signal are time-multiplexed Φ, and the time-axis pressure line color difference signal is a time-division multiplexed signal transmitted line sequentially. is taken out. Figure 3 (13) i, T 14- (The time division small signal of the J-like waveform is connected to the brining knowledge circuit 10.The clipping circuit 2 of the peak level
0. Clan-1 circuit 21, rM modulator 22゜1 bird field noise circuit 23, and recording amplifier 24.
5 and recorded on the magnetic deso 2G. Next i: l'jV〕Work←To explain the two, the switch circuits 2 and 13 are connected to the terminal 1) side. A small time division signal recorded in the signal form of a frequency modulated wave is transmitted to the magnetic j-wave 26F by the reproducing head 27, and this reproduced frequency modulated wave is transmitted to the regenerative amplifier 2.
8. rll riser 29. High pass filter 30. F circuit 32J passes through a known output/1-signal processing circuit and generates a 1-hour multiplexed signal as shown in FIG. Nobumasa Multiplex is controlled so that the human power bow passes through as it is when not dubbing4.
I (passes through the switch circuit 338), and further terminal []
The switch circuit 2 and the low-pass filter 33 connected to the converter 5), the Kaimei separation circuit 61 are connected to the switch circuit 2 and the low-pass filter 33, which are supplied to the detector 33 At the same time, terminal F) km is connected (- switch () 1 path 1 (3 through 1, ``C A I) converter 1 /l Lm supplied i'l 5, AD converter 5, R
AM8 and 9, switch circuit 10 and [)A converter 11
The circuit section consisting of -1-1-11- is based on the output signal of the luminous signal device 7, and is extended by C time 4III+ (returned to the same time axis as the N3 luminance signal L3, S,, /I
to be accomplished. Here, ゛, R A M 8 and 9 10,000 +[
The time axis Li' of the j1 time-division multiplexed signal is
5 (When the response is 11, the usage is to read out the 7th movement, and the N1-ta R A
Mε3 and 9 are 1 tl m L. −,,,,intersection 77
(, (read operation μ) write operation 11 and line '.l
-5 < is the same as at the time of recording. 17, readout [-1 pulse repetition frequency II 1.i
For example, there is 8Ml-1z-r,",-,)"jT 5
7' 4(, 7 old axis extension 11. i, (Rinawara lk'fI!!l I+l+ fl.i-Navy 1 minute (-
The time axis is extended by 1. -) Reno 1 - Shining Itl signal crosses from [ku△M8.9 to I Llfij! Take it out to j 4'
Do 3. -BJ, △1) converter +4, RAM 15) and [)∆ converter 1 (1 consisting of 3); Time axis compression [14 difference values are 1 △M 1 After importing and exporting 5L, the readout operation is performed (j hi) (time axis is 10 and (J ., 11, that is, R A M
1 5 is, for example, 10M
-1 pulse (, 1 hour t1Mh, digital signal i), 2Ml-1z (D
55 times (,
3 The reproduction line sequential color difference signal whose time axis has been expanded and the C time axis has been restored is read out 1-13.
C+fr 41 wires are sequentially colored: 1, 11 are supplied to the '1st input terminal of the 1-der 334 after being sent back;
The burst signal detector 33 detects the L5MHz
The determination burst signal is detected and the Ln]-g 334
is supplied to the second human power CMi-f-. -Ln'-g34 (color difference signal of Maya's line color difference number of months)
Obtain a predetermined DC level difference between each line of R-Y) and ([3-Y)./, :<'C Frequency modulation? ) Nah C frequency modulated wave 1 7 - Wave number modulated wave 4 - Cut off the transmission of the frequency modulated wave only during the period before and after the horizontal synchronization signal of the frequency modulated wave of the helmet and carp and 1C, 5I7C To M method l'i (according to 7)
, 16In-=. 1-'! The beef cattle transport color (0't'4 is taken out from the output of 3 4 and is based on the SFCAM system) (0't'4 is supplied to the mixing circuit 35 according to Fig. 1, and this in'r + ',) The signal from the △ converter 11 is the signal Yσ, and the signal from the signal generator 7 is mixed. (11 converted to t)
, : 1 is output to the output terminal 36 4, such recording re-cow movement 1 is outputted to line 4 ``Re-recording re-cow operation d3 I-C1 recording magnetic field - U-126's previous record count)'' −) Unrecorded magnetic “
When dubbing i1 to J-P42! l1jJ('+') 0th order (C will be explained. During dubbing (4T is 11nl=[1-Levalus generation R effect is applied to the dubbing control signal, To switch circuit 38-1
When horizontal synchronization signal 3 [- with a waveform similar to that shown in FIG. 37 times As shown in Figure (1-), 1 for discrimination 1 8 - Burst l- (j'1 is the burst Buddha 8 generation circuit 1 for discrimination.
7'', reswitch circuit: 1 B is supplied. On the other hand, the previously recorded signal is transferred from the recording head 126 to the playback head 27.
8. High-pass filter 30. FM demodulator 31. Since the horizontal synchronizing signal in the reproduction time division multiplexed signal of the de-emphasis circuit 32 (V) has a narrow pulse width of about 4 μs, as shown in the above b/:, it is , the playback waveform becomes sluggish, roars, and then again.
The discrimination burst signal in the time division multiplexed signal also deteriorates during the recording process. Therefore, the switch circuit 38
1tf cow time-division multiple bow from 2 horizontal open-meeting irises (
(including vertical synchronization signal component) and discrimination parse 1 to signal 23
The horizontal synchronization signal that is generated by the pulse generator 7 and the judgment parse 1~
It is replaced with the discrimination burst No. iF4 from the signal generation circuit 17. As a result, the switch circuit 3ε3 or 1-) takes out the reproduction time-division polygon Φiha>lH in which the horizontal synchronizing signal and the signal to the discrimination berth 1 have been switched, respectively, and outputs another signal from the output terminal f'39. The input terminal 41 in FIG. (31, Bri-Ninoassist circuit 19.'/Rip circuit 20, Clamp circuit 21. [2M modulator 22. High frequency filter 23
and a recording amplifier 24 are supplied to a recording head 25, thereby recording on an unrecorded magnetic tape 42. In this way, the recorded green signal of the recording pan-magnetic j-b 2G is not converted into a standard color video signal by the unrecorded magnetic j-b 42, and the horizontal synchronization signal and the discrimination pulse signal have waveforms. It is possible to dub an extremely high-quality image compared to the C1 flux that is formatted (duplicated/J). Weight moon is 14 & Ki-game J26 and playback head 2
7. In general, time axis fluctuations (jitter) are controlled by fluctuations in the relative linear velocity of any IW. If this playback time axis fluctuation occurs, when the dubbed time-division multiplexed signal is reproduced, the one-shot time axis fluctuation in this playback system will be added to the time axis expansion circuit (, The clock pulse generation circuit that supplies one pulse (this is located in the -1 input to the roll pulse generation circuit 7) is unable to sufficiently follow the fluctuations in the playback time axis.
Due to a difference in the time axis expansion rate between the compressed luminance signal and the line-sequential color difference, the luminance signal and the color difference signal may deviate from each other on the screen. In this embodiment of the device of the present invention, the switch circuit 38
Output cuff 1T A 4 time division multiplexed signal, switch circuit?
, the low-pass filter 3 is used to extend the time axis during -C reproduction, and the time axis of the time axis LE compressed luminance signal is Supplies the expansion circuit. Therefore, this time axis expansion circuit uses the dubbing control signal inputted to the input terminal 37 to output from the control pulse generator 7 the timing when the time axis is expanded. Since the ivy pulse is generated, do not increase the time axis by 11, but set it to 10i111.
．． ' + Remove the axis fluctuation. , (J'l'; straw, 1 △M8 and 9 write and read every 11-1) The movement I is repeated, but the ingress and egress [-1 pulse (maiq <, t11i division multiplexing) The read clock pulse is selected to have the same time axis variation as the signal, and the read clock pulse has the same repetition frequency as the write 1-1 vine pulse, and has no time axis degree vJ. Since the DA converter 11 outputs the reproduction time division multiplexed signal (if
fi number is taken out. This reproduced time-division multiplexed signal is outputted from the output terminal 41 to the dubbing signal input terminal of another recording/reproducing device, and is passed through the blocks 19 and 2/1 shown in FIG. 1 in the same manner as described above. The recording head 25 records on the unrecorded Cheebu/12. Application Example The device described in this section can be applied to the recording and reproduction of cuff-video signals of the 1 method and the NrSC/j method. In this case, j゛=, :+-da4 C-transport 22- (b.
There is a conversion J-ru 6 east in the i issue, and it is necessary to process the reproduction line sequential color difference 11 month to the same ll, +r. According to the present invention, it is possible to convert a time-division multiplexed signal of 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period (1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period 1 time period to 1 time division 1 time division 1 time division 1 time period) from a recording medium to convert it into a standard system color video signal is possible. J] Mamizu [Since the first cycle signal and the discrimination signals of two types of color difference signals are recorded on unrecorded recording media from the 8C, it is easier to dub (X
The number of times the color video signal passes through the filter and the number of times it passes through the [M modulation/demodulation, etc.] can be reduced, and the number of times the color video signal passes through the time axis F11 circuit and the time axis expansion circuit can also be reduced by one. Even in the form of a division multiplexed signal, it is possible to perform dubbing with higher quality than before, and in addition, by replacing the signal with the water XF synchronization signal and the discrimination berth 1, the recording 14f (・Deterioration I) When performing the test using the accumulated water\P same 1υ1 signal and the burst signal for discrimination as a reference, it is possible to prevent color shift etc. in one double-sided image. , history (using the time axis expansion circuit of the earth time axis + p + reduced luminance trembling, - C re - F time multiplex Φ - regeneration n; + i axis fluctuations are removed,
However, there are some things that can be done to prevent the light from changing colors due to natural time axis fluctuations.

[Brief explanation of the drawing]

Fig. 1 is a 7-D track system diagram showing a recording/reproducing device including one embodiment of the device of the present invention; Fig. 1 is a signal waveform diagram for explaining the operation of the control block 11 system.
4...△[]Converter, 6...1111 minutes 1131
1 circuit, 7...' 1-roll pulse generator, 8.
9゜15...Random j' access memory (RA
M), 11.16...Converter to [), 12.38.
・Switch circuit, '17 . . . Determination berth] ・ Signal transmission J generation circuit, 22 . . . FM modulator, 26 . . . . . . fn-]1-da, 35 . . . Mixing circuit, J 36 . . . Reproduction base color video signal output terminal, 37 . . . Dubbing control signal input terminal r, 39. /10... Playback time division multiplex signal output terminal for dubbing, 41... Playback time division multiplex signal input terminal for dubbing, 42... Unrecorded magnetic tape. 25-

Claims (2)

[Claims] (1) Do the two types of time axis pressure line color stops No. 3 intersect every horizontal scanning period? 71-2, and when the time axis [[reduced color difference signal is extensively time-division multiplexed with the horizontal bright signal and the time axis compressed luminance signal within the scanning period of 1 water < p, the JJH The time-division multiplexed signal on which the discrimination signal of the color difference signal is multiplexed is frequency-modulated and recorded. , a replacement means for replacing the horizontal synchronization signal and the discrimination signal in the reproduction time division multiplexed signal with separately generated horizontal synchronization signals and discrimination signals, respectively, and reproduction time division multiplexing means extracted from the reproduction time division multiplexing means. Frequency modulation of multiplexed signal F
1. An FM modulator, etc., comprising a recording means for recording an output signal of the FM modulator on an unrecorded recording medium.
1-Dubbing device for color video signals. (2) Two types of time-axis compressed luminance signals are generated for 1 horizontal scanning period 111
Interact with the eyes! 7, and the time axis compressed color within 1 horizontal scanning light; -4 Fr; The time-division multiplexed signal, which is time-division multiplexed and discriminates two types of color difference signals (ili-Y), is frequency-modulated (recorded and FMlu-tuned C1/1 time division multiplex signal reproducing means; a horizontal bright signal and a discrimination signal that separately generate the water 117-doimei signal and the discrimination signal in the reproduced time division multiplex signal; 1 step of replacing a large amount and removing it from the replacement means c
The cleared 7Ti time-division multiplexed signal is supplied to a time-base expansion circuit that can be used to expand the time-base of the time-base compressed luminance signal, and the reproduced time-base fluctuations of the entire reproduced time-division multiplexed signal are removed. means, and the playback time axis fluctuation is removed (I)
an FM modulator that frequency-modulates the time-division slave signal;
A dubbing device for Carthy video signals, comprising a recording means for recording an output signal of an M modulator on an unrecorded recording medium.