JPH0231557B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a rotating head type magnetic recording and reproducing device (VTR) for recording and reproducing PAL or SECAM color television signals, which enables long-time recording, static reproduction, slow-motion reproduction, high-speed reproduction, and reverse rotation. The structure is such that, during special playback such as playback, a good playback signal can be obtained without skew distortion due to discontinuity of the horizontal synchronization signal and without disturbance of hue due to discontinuity of the color signal. In recent years, there has been a trend toward higher density in home VTRs,
In a two-head helical scan VTR, a recording method in which the two heads are provided with an azimuth angle and no guard band is provided between adjacent tracks is becoming common. Figure 1 shows the VHS system for PAL and SECAM signals.
Shows the recording pattern of a VTR. In Figure 1,
-A, -B, -A, -B.... represent recording tracks, -A, -A, -A,...
is the trajectory written by head A, -B, -B,
-B, . . . are loci drawn by the B head, and an azimuth angle of ±6° is provided between the A head and the B head (not shown in the figure). Also, −1, −
2, -3, . . . represent line numbers, and the appended R and B represent the color signals of the lines. In other words, for PAL signals, R-
Although the phase of the Y signal is inverted, a state in which the RY signal is positive is represented by R, and a negative state is represented by B. Also,
In the SECAM signal, the R-Y signal and the BY signal are transmitted alternately on each line. Represented by B. Also, _αH is the amount of deviation of the horizontal synchronization signal between adjacent tracks, and
In PAL and SECAM signal VTRs, α _H is set to 1.5. In addition, the track pitch at this time
T _p was 49 μm, and tape speed was 23.4 mm/S. In this way, for VHS system PAL, SECAM signal
In a VTR, horizontal synchronization signals between adjacent tracks are lined up, and adjacent color signals are also lined up. That is, the neighbor of R is R, and the neighbor of B is B. Next, the case of performing special playback (still, slow, high-speed, and reverse playback) with such a VTR will be explained. FIG. 2 shows head trajectories for static playback, FIG. 3 for high-speed playback, and FIG. 4 for reverse playback, where is the playback trajectory of head A, and is the playback trajectory of head B. However, in Fig. 2, both heads A and B draw the same trajectory. As mentioned above, A, B
Since both heads have azimuth degrees,
The A head reproduces only the signal of the trajectory written by the A head, and the B head reproduces only the signal of the trajectory written by the B head. Therefore, in FIGS. 2 to 4, the signals in the shaded areas are reproduced. In Figure 2, in the A head, the signal in the shaded area is
In the B head, the signal in the shaded area is reproduced.
During such special playback, the recording trajectory may be jumped during one playback of one head, or the signal order may be different from that in normal playback when switching heads. These states can be categorized as follows: 1. During one playback of one head, a transition occurs to the next recording trajectory (during high-speed playback). [In Figure 3, from the -A trajectory of the A head-
Transition to A trajectory and transition from -B trajectory to -B trajectory of B head] 2. Transition to the next recording trajectory when switching heads (during stationary, slow, high speed, and reverse playback). [In Figure 2, the transition from the -B trajectory of the B head to the -A trajectory of the A head, and in Figure 4, the transition from the -A trajectory of the A head to the -B trajectory] 3. Move to recording trajectory (during high-speed playback). [In Fig. 3, the transition from the -A trajectory of the A head to the -B trajectory of the B head] 4. Transition to the previous trajectory when switching heads (during stationary, slow, and reverse playback). [In Figure 2, the transition from the -A locus of head A to the -B locus of head B; in Figure 4, the transition from the -B locus of head B to the -A locus of head A] 5 1 of one head During playback, move to the previous recording trajectory (when playing still, slow, or in reverse). [In Figure 4, from the -A trajectory of the A head-
There are five ways: transition to the A locus, transition from the -A locus to the -A locus, and transition from the -B locus of the B head to the -B locus. In the five cases described above, the continuity of the horizontal synchronization signal and the continuity of the color signal are important. If the continuity of the horizontal synchronization signal is lost, skew distortion will occur on the screen. Next, we will discuss the continuity of color signals. In PAL and SECAM signals, the color signal is switched for each line.
That is, in PAL, the phase of the carrier wave of the R-Y signal is inverted for each line, and in SECAM, the phase of the carrier wave of the R-Y signal is inverted for each line.
The Y signal and the B-Y signal are switched and transmitted line by line. Therefore, if the order of the color signals is reversed in the middle or at the beginning of the field, the color discrimination circuit of the television receiver may malfunction, it may take a long time to read in, the color may not appear, or the color may not appear in the middle or at the top of the screen. The hue may become distorted. Looking at the five cases mentioned above on a VTR with the recording pattern shown in Figure 1, in cases 1 and 5, the horizontal synchronization signal and color signal are lined up in the recording pattern, so the continuity of the horizontal synchronization signal is also the same as that of the color signal. Continuity is also maintained. In case 2, the switching of heads is carried out exactly the same as in the case of normal reproduction, so that the continuity of the horizontal synchronizing signal and color signal is maintained. 3, the signals played when switching heads are 2 tracks and 2α _H.
Line skipped. From -A in Figure 3-
In the transition to B, -B track and -A track and -312 line of -A track,
-313 line (1/2 line), -313 line (1/2 line) and -314 line of -B track are skipped, and the line shifts from -311 to -315. Therefore, the total number of lines skipped is 625
+2α _H =628 (α _H =1.5), which is an even number, so the continuity of the horizontal synchronization signal and color signal is maintained. In the case of 4, when switching heads, the reproduced signal returns to the previous track and returns to the 2α _H line. In the transition from -A to -B in FIG. 2, there is a transition from line -314 of track -A to line -312 of track -B. That is,
625+2α _H = Go back 628 lines. Figure 4 -
Similarly, when moving from the B track to the -A track, the line returns to the front by 625+2α _H =628 lines. Since this is an even number, the continuity of the horizontal synchronization signal and color signal is maintained. In this way, the recording pattern shown in Figure 1
In a VTR, the continuity of the horizontal synchronization signal and color signal is always maintained even during special playback. Next, a basic block diagram of signal processing of a VHS system PAL and SECAM signal VTR is shown in FIG. 5, and will be briefly explained. In Fig. 5, 1 is a video signal input terminal, 2 is a low-pass filter, 3 is a band filter, and 4 is a video signal input terminal.
is a frequency modulator, 5 is a frequency converter, 6 is an adder, 7 is a head, 8 is a high-pass filter, 9 is a low-pass filter, 10 is a frequency demodulator, 11 is a frequency converter, 12 is an adder, 13 is a video signal output terminal. A video signal applied to an input terminal 1 is separated into a luminance signal and a carrier color signal by a low-pass filter 2 and a bandpass filter 3. The luminance signal is converted into a frequency modulated wave by a frequency modulator 4 and guided to an adder 6.
On the other hand, the carrier color signal is converted to a lower frequency by a frequency converter 5, superimposed on the frequency modulated wave by an adder 6, and recorded on a tape via a head 7. During this frequency conversion to the low frequency range, signal processing is applied to each of the PAL and SECAM signals. The signal reproduced from the head 7 is separated by a high pass filter 8 and a low pass filter 9 into a frequency modulated wave of a luminance signal and a carrier color signal converted to a low pass. The frequency modulated wave is guided to a frequency demodulator 10 and demodulated to obtain a reproduced luminance signal, and an adder 1
Leads to 2. On the other hand, the carrier color signal converted to a low frequency band is returned to its original frequency by a frequency converter 11, and added to the reproduced luminance signal by an adder 12, so that a reproduced video signal is obtained at an output terminal 13. In the process of returning the carrier color signal to its original frequency in the frequency converter 11, signal processing is applied to each of the PAL and SECAM signals. The present invention provides a method for obtaining continuity of horizontal synchronizing signals and color signals during special playback by increasing the density even further than the pattern shown in FIG. 1, or by using a different pattern. be. As explained in FIGS. 2 to 4, there are five cases in which signal discontinuity may occur during special playback. In each case, the continuity of α _H , horizontal synchronization signal, and color signal in an arbitrary pattern will be explained. If it is 1, it will move to the 625+2α _H line when moving to the track. In case of 5, move to 625+2α _H line front. Also, as mentioned above, when switching heads,
In the case of 2, the signal transitions in exactly the same way as during normal playback, and the continuity of the horizontal sync signal and color signal is maintained in any pattern.
Move to 2α _H line ahead, and in case of 4 move to 625+2α _H line ahead. Therefore, the condition for the horizontal synchronization signal to be continuous in these cases is that the number of lines skipped or the number of lines reversed is an integer, that is, 625 + 2α _H is an integer, α _H = n/2 (n: integer). Further, the condition for the color signal to be continuous is that 625+2α _H is an even number, that is, 2α _H is an odd number, and α _H =(2n+1)/2 (n: integer). From the above, when increasing the recording density even further than the recording pattern shown in Figure 1, it is clear that not only normal playback but also
The only recording pattern in which continuity of the horizontal synchronizing signal and color signal can be obtained even during special playback is α _H =0.5. However, for PAL and SECAM signals of VHS system
When α _H =0.5 in a VTR, the tape speed is 7.8 mm/s and the track pitch TP is 16 μm, resulting in poor audio performance and image quality. Therefore
With a recording pattern of 0.5 < α _H < 1.5, during special playback,
It is desirable to obtain continuity of the horizontal synchronization signal and color signal. One method for obtaining continuity of color signals during special playback using an arbitrary recording pattern of α _H where α _H ≠ (2n+1)/2 is described in Japanese Patent Application No. 106946/1983. Further, when α _H =n/2, continuity of the horizontal synchronizing signal during special playback can be obtained as described above. In view of the above points, the present invention aims at increasing the recording density from α _H = 1.5 and recording a recording pattern or arbitrary α _H ≠ (2n+1)/2 that can provide satisfactory audio performance and image quality for home use. The present invention provides a method that allows continuity of horizontal synchronization signals and color signals to be obtained even in patterns during special reproduction. Now, if we halve the tape speed of a VTR for VHS system PAL and SECAM signals, α _H =0.75,
Tape speed is 11.7mm/S, track pitch is
T _P =24 μm, and the audio performance and image quality are almost satisfactory for home use. This α _H
The present invention will be explained by taking the case of =0.75 as an example. Note that the present invention is applicable not only to α _H =0.75 but also to any α _H
It is also applicable to a recording pattern of (≠(2n+1)/2). FIG. 6 shows the recording pattern when α _H =0.75. In FIG. 6, the symbols for track, line and color signals have the same meanings as in FIG. Also, Fig. 7 shows the trajectory of the head during static playback with this recording pattern, Fig. 8 shows the trajectory of the head during high-speed playback, Fig. 9 shows the trajectory of the head during reverse playback, Fig. 10 shows the trajectory of the head during static playback, and Fig. 11 shows the high-speed playback. , FIG. 12 shows the order of the horizontal synchronizing signal and color signal, the reproduction track, and the reproduction envelope waveform during reverse reproduction. In Figures 7 to 9, α _H =1.5
Corresponding to FIGS. 2 to 4 in the case of , the symbols have the same meanings. In any recording pattern where α _H ≠n/2, the continuity of the horizontal synchronizing signal and color signal is broken in special reproduction cases other than the above-mentioned 2. These cases of special playback will be explained with reference to FIGS. 7 to 12. In the case of special playback 1, for example, during high-speed playback in Figures 8 and 11, the A head is in the shaded area -A.
When moving from track to -A track (first
This corresponds to point a in Figure 1) and when the B head moves from the -B track to the -B track (point b in Figure 11). At this time, discontinuity occurs because the horizontal synchronizing signals and color signals are not aligned between the A tracks and between the B tracks. The number of lines skipped at this discontinuity point is 625 + 2α _H =
626.5 (α _H = 0.75), and at point a in Figure 11 -
From the middle of line 3 (R) to the middle of line -4 (R), at point b, from the middle of line -622 (B) to the middle of line -623 (B), and the interval of the horizontal synchronization signal at the time of transition. is 0.5H (H: unit of line period). Also, the color signal is -2 line at point a.
There is a period of 0.5H in the process of moving from (B) to -5 line (B), and at point b, from -621 line (R) to -
There will be a 0.5H period in the process of moving to the 624 line (R). Both are discontinuous points compared to continuous points, and the color signal after the discontinuous point is 0.5H ahead (1.5H behind) with respect to the color signal before the discontinuous point. 3, in Figures 8 and 11,
This corresponds to the switching point from the -A locus of the A head to the -B locus of the B head (point c in Figure 11). The skipped line at this time is 1/4 after the -312 line.
626.5 line (625+
2α _H :α _H =0.75), and the same discontinuity as in case 1 above occurs. At point c, at the transition from the end of the -311 line to the beginning of the -315 line, the horizontal synchronization signal interval becomes 1.5H, and the color signal changes from B to R.
There is a 1.5H period in the process of moving to . In this case also 1
As in the case of , compared to the continuous case at discontinuous points,
The color signal after the discontinuity point is different from the color signal before the discontinuity point.
0.5H ahead (1.5H behind). 4, in Figures 7 and 10, -A of the A head.
Switching point from the trajectory to the -B trajectory of the B head (first
This corresponds to point d in figure 0). At this time, 626.5 lines from the 1/4 point from the beginning of the -314 line to the 3/4 point from the beginning of the -312 line (625 + 2α _H : α _H = 0.75)
Go back. At point d, in the transition from the end of the -313 line to the beginning of the -313 line, the horizontal synchronization signal interval becomes 0.5H, and the color signal changes from B to R.
There will be a period of 0.5H. At this time, compared to the case where there is continuity at the discontinuous point, the color signal after the discontinuous point is 1.5H ahead of the color signal before the discontinuous point (delayed by 0.5H). 5, the transition from the -A locus of the A head to the -A locus (first
Figure 2 point e), transition from -A trajectory to -A trajectory,
This corresponds to the transition of the B head from the -B locus to the -B locus (point f in Fig. 12), and a discontinuity similar to that in case 4 occurs. At point e, the interval between the horizontal synchronizing signals becomes 1.5H when moving from the end of the -311 line to the beginning of the -312 line, and there is a 1.5H period in the process of the color signal moving from B to B. In this case, as in case 4, the color signal after the discontinuous point is different from the color signal before the discontinuous point compared to the case of continuous points.
1.5H ahead (0.5H behind). The same is true for point f. The discontinuous states described above will be summarized and generalized.
If the number of lines formed on one track is t _H (t _H = 312.5 in the above example), 2 (t H + α H ) lines are skipped for special playback 1 and 3, and 2 (t _H +α _H ) lines are skipped for 4 and 5.
In this case, the signal returns to the signal 2 (t _H +α _H ) lines earlier. If the number of lines 2 (t _H +α _H ) to be skipped or returned to the previous line is an integer, the horizontal synchronizing signal will be continuous at that point, and if it is an even number, the color signal will also be continuous. Therefore, in cases 1 and 3 above, the horizontal synchronizing signal is equivalent to being skipped by [2(t _H + α _H )-m] lines (m: integer) at the track transition point, and the color signal is [2( t _H +α _H )−2l] This is equivalent to skipping a line (l: integer). In addition, in the case of 4, the horizontal synchronization signal is equivalent to returning to the front of [2 (t _H + α _H ) − m] lines, and the color signal is [2 (t _H + α _H ) −
2l] Equivalent to returning to the front of the line. This is before and after the discontinuous point, and in the case of 1 and 3, the signal after the discontinuous point is the horizontal synchronization signal ahead of the signal before the discontinuous point by [2 (t _H + α _H ) - m] lines. , which means that the color signal advances by [2(t _H +α _H )−2l] lines.
In addition, in the case of 4 and 5, the horizontal synchronization signal is [2
(t _H +α _H )-m] line delay, color signal is [2(t _H +
α _H )−2l] means a line delay. Applying this to α _H = 0.75 mentioned above, 2(t _H + α _H ) =
626.5, m = 626, 2l = 626, in the case of 1 and 3, after the discontinuity point, the horizontal synchronization signal is
0.5H advances, color signal advances 0.5H, in the case of 4 and 5,
After the discontinuity point, the horizontal synchronization signal is delayed by 0.5H and the color signal is delayed by 0.5H, which agrees with the above results. As explained above, when special reproduction is performed, the continuity of the horizontal synchronizing signal and color signal is broken in cases other than the above-mentioned 2. In consideration of the above points, the present invention performs normal color signal reproduction during special reproduction,
This enables high-density recording. 13 and 14 are basic block diagrams of the first embodiment of the present invention when α _H =0.75, FIG. 15 shows the delay line switching switch control signal, and FIG.
The relationship between the waveforms of each part and the color signal in Figures 13 and 14 is shown in the figure, and the recording pattern of the color signal (α _H
= 0.75), and the present invention will be explained according to these. FIG. 13 shows an embodiment of the recording system of the present invention, in which numerals 1 to 7 represent the same elements as in FIG. 5, and the operations are also the same. 14, 15, 16 are each 0.5H,
1.0H and 1.5H delay lines, 17 is a switch circuit, 18 and 19 are adders, 20 is a head switching signal input terminal, 21 and 22 are flip-flops, 2
3 is a head switching signal, 24 and 25 are output signals of flip-flops 21 and 22, respectively, 26 is a vertical synchronizing signal separation circuit, 27 is a vertical synchronizing signal, and 28 is a vertical synchronizing signal.
AND circuit, 29 is the first index signal, 3
0 is a second index signal generation circuit, and 31 is a second index signal. The waveforms in FIGS. 15 and 16 correspond to the signals with the respective numbers above.
In FIG. 13, the luminance signal is connected to the frequency modulator 4 after passing through the low-pass filter 2, as in the case of FIG. 5, and is combined with the chrominance signal in the adder 6.
On the other hand, the carrier color signal output from the band filter 3 is directly sent to the a terminal of the switch circuit 17.
Switch circuit 1 via 0.5H delay line 14
7, to the c terminal of the switch circuit 17 via the 1.0H delay line 15, to the d terminal of the switch circuit 17 via the 1.5H delay line 16,
Connect each. The switch circuit 17 receives a signal 24 obtained by dividing the head switching signal 23 applied to a terminal 20 by 1/2 using a flip-flop 21, and a signal 2.
Signal 2 obtained by dividing 4 into 1/2 by flip-flop 22
The output of the switch circuit 17 is controlled by 5, and the output of the switch circuit 17 is: terminal a when signal 24...high, signal 25...high; terminal b when signal 24...low; signal 25...high; signal 24...high, signal 25... When the signal is low, it is connected to the terminal c, when the signal 24 is low, and when the signal 25 is low, it is connected to the terminal d. Therefore, the output of the switch circuit 17 has a delay time of 0, 0.5H, 1.0H, 0, 0.5H, 1.0H, and
Carried color signals of 1.5H, 0, 0.5H, etc. are obtained.
The color signal is applied to a frequency converter 5, and the converted color signal is applied to an adder 18. Adder 1
8 is also applied with an index signal 29 (29 in FIG. 15) for determining the reference of the switch control signal. This index signal 29 is a vertical synchronization signal 27 obtained by the vertical synchronization separation circuit 26 (see FIG.
7), head switching signal 23 (FIG. 15, 23), output signal 24 of flip-flop 21 (15th and 16th
24), output signal 25 of flip-flop 22
AND each signal of (Fig. 15, 16 25)
When all of the four types of signals introduced into the circuit 28 are at high level, a signal having one period of 8 fields is obtained as an output, which corresponds to the time when the delay time of the color signal is O. A composite signal of the color signal obtained by the adder 18 and the first index signal 29 is further applied to an adder 19. Adder 1
9, a second index signal for controlling delay time switching of the reproduced luminance signal so that the time difference between the reproduced carrier color signal and the reproduced luminance signal is maintained at the same time or a time difference obtained by adding kHz to the reproduced carrier color signal and the reproduced luminance signal during special reproduction. 31 is also applied. This second index signal 31 is generated by an index generation circuit 30 controlled by the output signal 24 of the flip-flop 21. For example, as shown in FIG. 15, the period when the signal 24 is at a high level (the period when the color signal delay is 0 and 1.0H)
This shows that. This signal 31 may be a horizontal synchronizing signal that occurs at a frequency that does not overlap with the chrominance signal and the luminance signal during all or a part of the above period, or an arbitrary frequency that occurs during the whole or a part of the above period. It may be something that occurs part or all of the time. In FIG. 15 and the following drawings and explanations, the signal 31 will be treated as a pulse signal for convenience. The signal actually recorded and the pulse signal can be easily converted by amplitude modulation/demodulation or the like. A composite signal of the color signal obtained by the adder 19 and the first and second index signals 29, 31 is applied to the adder 6 and recorded in the same manner as in FIG. Now track (-A, -B), (-A,
-B), (-A, -B), (-A, -B),
The color signals recorded in ... are 0, 0.5H, respectively.
Assuming that the delay is 1.0H, 1.5H, ..., the recording pattern of the color signal will be as shown in Fig. 17, and the adjacent track will be 0.75H (or 0.25H), but every other track will be delayed. In this case, the color signals are aligned. Also, the first index signal is -
A, -A, ... tracks, the second index signals are (-A, -B), (-A, -B),
...It is inserted into the truck. Incidentally, the relationship between the track and the signal is not limited to that shown in FIG. 17 as long as the delay time switching matches the reference. Next, we will discuss the regeneration system. FIG. 14 shows an embodiment of the reproduction system of the first embodiment, and the relationship between the switch control signal, the waveforms of each part, and the color signal is shown in FIGS. 15 and 16 as in recording. To explain according to these, in FIG. 14, 7 to 13 are the same as in FIG. 5, and perform the same operations. 32 is 0.5H day line, 33 is switch, 34, 35, 36, 37
are delay lines of 2.0H, 1.5H, 1.0H, and 0.5H, respectively, 38 is a switch circuit, 39 is a first index separation circuit, 40 is a first index signal, 41 is a head switching signal input terminal, 42, 43
are flip-flops, 44 and 45 are the output signals of flip-flops 42 and 43, respectively, and 46 is the second flip-flop.
47 is the second index signal, 48 is an AND circuit, 49 is an AND circuit 4
8 output signal, 50 is NOR circuit, 51 is output signal of NOR circuit 50, 52 is OR circuit, 53 is OR
The output signal of the circuit 52, 54 is an envelope detector, 55 is the output signal of the envelope detector 54,
56 is a pulse generator, 57 is an output signal of the pulse generator 56, 58 is a flip-flop, and 59 is a switch control signal, and the waveforms in FIGS. 15 and 16 correspond to the signals with the respective numbers above. Part of the reproduced luminance signal obtained by the frequency demodulator 10 is connected to the switch 33, and the other part is applied to the 0.5H delay line 32 and then connected to the switch 33. Switch 33 is controlled by switch control signal 59. During normal playback, switch 3
Only the signals that do not pass through the delay line are output to the output of No. 3. (The control signal 59 will be explained later at the time of special reproduction.) The output signal of the switch 33 is combined with the reproduced color signal by the adder 12. On the other hand, the reproduced color signal returned to the original frequency by the frequency converter 11 is transmitted to the 2.0H delay line 34,
It is connected to input terminals a, b, c, and d of a switch circuit 38 through a 1.5H delay line 35, a 1.0H delay line 36, and a 0.5H delay line, respectively. The switch circuit 38 is a flip-flop 4
It is controlled by the output signal 44 (44 in Figs. 15 and 16) of 2 and the signal 45 (45 in Figs. 15 and 16) obtained by dividing the signal 44 into 1/2 by the flip-flop 43, and performs the same operation as the switch rotation 17. (16th
44, 45, 62 in the figure). As a result, the output of the switch circuit 38 has a delay time of 2.0H, 1.5H, 2.0H, 1.5H, etc. for every two tracks, as shown in FIG.
Reproduction color signals of 1.0H, 0.5H, 2.0H, 1.5H, ... are obtained. As mentioned above, at the time of recording, 2
Since the delay is switched for each track,
As shown in FIG. 16, the total delay time for recording and reproduction is 2.0H for all tracks. This is because the control signals 44 and 45 of the switch circuit 38 are controlled by the index signal 40 (FIG. 16) during reproduction so that the total delay time for all tracks is equal. The relationship between these signals is as shown in FIG. , 43 to their respective reset terminals. When the index signal is applied,
The outputs 44 and 45 of the flip-flop become high level, and the signals 44 and 45 are outputted, respectively, in response to the input of the head switching signal until the next index signal arrives. That is, during reproduction, switching of the delay time of the reproduced color signal is controlled using the separated first reproduction index signal 40 as a reference. The color signal output from the switch circuit 38 is combined with the reproduced luminance signal in the adder 12 and outputted from the terminal 13 as a reproduced video signal. In the above explanation, the reproduced luminance signal is not delayed during reproduction, but by using a delay line with a time of 1.0H or an integral multiple of H added to it, the time difference between the reproduced luminance signal and the reproduced chrominance signal can be reduced. It can also be 0 or an integral multiple of H. It is also possible to perform a delay during recording and not perform a delay during playback, or to use both in combination. Furthermore, in the above description, delay switching was controlled using the first index signal so that the total delay time for recording and reproducing color signals of all tracks was constant. If the flip-flop 42 is controlled using the index signal (the flip-flop 43 is not controlled).
Although a difference of 2H may occur in the total recording and reproducing delay time, the continuity of the color signal is maintained, so color signal reproduction can be performed. Next, the case of performing special playback will be described. During special playback, no control is performed using the first playback index signal, and only the output signals of the flip-flops synchronized with the head switching signals are used as switch control signals. 7th during special playback
As described in the explanation of Figures 9 to 9, there are five cases in which discontinuity of the color signal occurs, and the manner in which the continuity of the horizontal synchronization signal and the color signal breaks down in the case of α _H = 0.75, as explained above. . Examples of the present invention will be described for these cases. Figures 18, 19, and 20 show the recording patterns shown in Figure 6 for the luminance signal and the recording patterns in Figure 17 for the chrominance signal, respectively, when special reproduction is performed with the reproduction trajectories shown in Figures 7 to 9. FIG. 3 is a diagram showing a delay time relationship between a track luminance signal and a chrominance signal. 44, 45, 62, 6
3 is the same as that in Figure 16, 65, 55,
57, 47, and 59 are envelope waveforms, envelope detection output signals, pulse generator output signals, second index signals, and
This is a switch control signal. 66 to 69 are playback tracks for static playback, 70 to 73 are high speed playback, and 74 to 77 are reverse playback, recording delay time of color signals, total delay time of recording and playback of color signals,
It represents the reproduction delay time of the luminance signal. Before explaining the delay relationship between the color signal and the luminance signal during special playback, we will explain the switch 33 that switches the delay of the luminance signal.
The operation of the control signal 59 will be explained using the case of static playback shown in FIG. 18 as an example. The second index signal inserted and recorded at two field intervals during recording (in the example, the delay time of the recorded color signal is 0 and
It is inserted in a period of 1.0H. ) is separated from the head output signal by the index separation circuit 46 during special playback. In the example of FIG. 18, the second index signal is obtained during the -B reproduction period. The obtained second index signal 47 and the output signal 44 of the flip-flop 42 are connected to an AND circuit 48 and a NOR circuit 5, respectively.
0 and OR the obtained point force signals 49 and 51.
applied to circuit 52 to obtain signal 53. That is, the calculation output 53 of the index signal 47 and the flip-flop output signal 44 is as follows: When the signal 47 is high and the signal 44 is high, the output signal 53 is
...High signal 47...High, signal 44...Output signal 53 when low
...Low signal 47...Low, signal 44...Output signal 53 when high
...Low signal 47...Low, signal 44...Output signal 53 when low
...becomes high. On the other hand, the envelope 65 is detected by the envelope detector 54 and becomes a signal 55, which is applied to the pulse generation circuit 56, which generates a pulse 57 at the depressed portion of the envelope. The pulse 57 is applied to a flip-flop 58 to obtain the switch control signal 59 whose period is the envelope drop. The flip-flop 58 has the above OR
The output signal 53 of the circuit is applied as a control signal, and when signal 53 is high, the output signal 59 of flip-flop 58 (switch control signal) is high. The switch 33 is switched using the switch control signal, and the luminance signal is not delayed during the period in which the total delay time for recording and reproducing the color signal is an integer multiple of H (the period in which the signal 59 is at a high level). A delay of 0.5H is performed in a period 0.5H off from the double (a period in which the low signal 59 is at a low level). In the case of the above-mentioned special playback 1, in FIG. 8, when transitioning from -A track to -A track, and -
This corresponds to the transition from the B track to the -B track, resulting in a color signal delay as shown in FIG. 19, for example, 72. In this case, since one head is performing one reproduction, no color signal delay switching is performed during reproduction. As can be seen from the recording pattern in FIG. 17, the color signals of every other track are lined up, so that the continuity of the color signals is maintained. In addition, in FIG. 19 72, the delay amount of the color signal changes by 0.5H at the time of transition from -A to -B and from -B to -B (the color signal after the transition is delayed by 0.5H). This means that the color signal is 0.5H after the discontinuous point when reproducing the original pattern in Figure 8.
Since it is advanced, the order of the color signals can be normalized by delaying 0.5H at the time of transition. Further, as in the case of FIG. 18, the luminance signal is not delayed when the signal 59 is at a high level, and is delayed by 0.5H when the signal 59 is at a low level. In this way, since the luminance signal advances by 0.5H after the discontinuity point when reproducing the original pattern shown in FIG. 8, continuity of the horizontal synchronizing signal can be maintained by delaying by 0.5H at the time of transition. 2 corresponds to the transition from -B to -A in FIG. 7 and from -A to -B in FIG. 9, resulting in color signal delays as shown in 68 in FIG. 18 and 76 in FIG. 20. In this case, the continuity of the color signal is maintained by the same color signal delay switching as during normal reproduction. As for the luminance signal, there will be a delay like 69, 77,
As with normal playback, the continuity of the horizontal synchronization signal is maintained. 3 corresponds to the transition from -A to -B in FIG. 8, resulting in a color signal delay as shown in FIG. 19 72. In this case, the total delay amount for recording and reproducing color signals when switching heads changes by 0.5H. (Color signal after switching is delayed by 0.5H) When the original pattern shown in FIG. 8 is reproduced, it is ahead by 0.5H after switching, so the order of the color signals can be made normal by delaying by 0.5H. As for the luminance signal, the continuity of the horizontal synchronizing signal can be maintained by delaying the -A track by 0.5H when switching heads as shown in 73. 4, -A to -B in Figure 7, - in Figure 9
Corresponds to the time of transition from B to -A, Fig. 18 6
8. The color signal is delayed as shown in Fig. 20 76. In the case of 68 in Fig. 18, no color signal delay is performed when switching heads, and the original pattern in Fig. 7 is
Since the 1.5H delay is corrected, continuity is maintained. In the case of FIG. 20 76, the original pattern shown in FIG. 9 is played back by 1.5H, so it can be made normal by delaying 1.5H at the time of switching. As for the luminance signal, the continuity of the horizontal synchronizing signal can be made normal by advancing it by 0.5H when switching heads, as shown in 69 and 77. 5 corresponds to the transition from -A to -A, -A to -A, and -B to -B in Fig. 9, and the color signal lags as shown in Fig. 20 76, and in this case as well, The continuity of the color signal can be made normal in the same way as in the case.
The brightness signal also becomes as shown in 77, and the continuity of the horizontal synchronization signal can be made normal. As described above, according to the present invention, it is possible to maintain the continuity of color signals normally in any case of special reproduction, eliminate errors in color discrimination in a television receiver, and provide normal colors. In the above embodiment, during normal playback,
Although a case has been described in which the total delay time of color signals is 2.0H, it may be configured to be delayed as shown in Table 1 below during reproduction. In this case as well, during special playback,

The luminance signal delay switching operation in [Table] is the same as that described above. In addition, envelope detection was used to detect discontinuous points in the horizontal synchronization signal during special playback by using the drop in the envelope. Discontinuities can also be detected. Also, during special playback, the switch control signal for switching the delay of the luminance signal is obtained by detecting discontinuities in the horizontal synchronization signal, such as by envelope detection.
If the second index signal is inserted into the entire delay time period of 0 and 1.0H of the recording color signal described above, it is possible to obtain the index signal only by detecting the index signal. In the above explanation, it was necessary to record the second index signal in order to switch the delay of the luminance signal in response to the switch of the delay of the color signal during special playback. A method that does not require the second index signal will be explained. 21st
22 and 22 show a basic block diagram of the second embodiment, FIG. 23 shows the delay line switching switch control signal, and FIG. 24 shows the relationship between the waveforms of each part in FIG. 21, the luminance signal, and the chrominance signal. The recording pattern of the color signal is the same as that shown in FIG. 17, and the recording pattern of the luminance signal is shown in FIG. The present invention will be explained according to these. Figure 21 shows an embodiment of the recording system, numbered 1 to 2.
9 represents the same thing as the first embodiment (Fig. 13), and the basic operation is the same, so
I will mainly explain the different points and keep the others brief. 78 is a 0.5H day line, and 79 is a switch. The luminance signal obtained by low-pass filter 2 is combined with the original signal and the 0.5H delay line 7.
The signals passed through 8 are respectively applied to switches 79 to effect delay switching. The switch 79 is controlled by the switch control signal 24, and the output of the switch 79 has a delay time of 0,
Luminance signals of 0.5H, 0, 0.5H, . . . are output, and are added to an adder 6 after passing through a frequency modulator 4. On the other hand, the color signal obtained by the band filter 3 undergoes the same delay switching as in the first embodiment, passes through the frequency converter 5, and is combined with the first index signal 29 in the adder 18. The composite color signal is further combined with the luminance signal in an adder 6 and recorded.
The first index signal 29 is produced with the same configuration as the first embodiment, and as shown in FIG. 23, one period is 8 fields, and the delay time of the luminance signal is 0, and the delay time of the color signal is 0. corresponds to the time of . Now track (-A, -B), (-A,
-B), (-A, -B), (-A, -B)...
The luminance signals recorded in ... are respectively 0, 0.5H,
If the delay is in the order of 0, 0.5H..., the recording pattern of the luminance signal will be as shown in Figure 25,
Horizontal synchronization signals can be arranged every other track. Note that the relationship between the track and the signal is not limited to that shown in FIGS. 25 and 17 for both the luminance signal and the chrominance signal, but the standards are the same, and in units of one frame, the luminance signal is 0, 0.5H, 0, 0.5H. ..., the color signal is 0.0.5H,
It is sufficient if the order is 1.0H, 1.5H, .... Next, we will discuss the regeneration system. FIG. 22 shows an embodiment of the reproduction system of the second embodiment, and FIGS. 23 and 24 show the relationship between the switch control signal, the waveforms of various parts, the luminance signal, and the color signal. First example (first
The same numbers as in Figure 4) are the same and perform the same operations. The reproduced luminance signal obtained by the frequency demodulator 10 is
The same signal as that passed through the 0.5H delay line 32 is applied to the switch 33 to perform a delay switching operation. On the other hand, the color signal obtained by the frequency converter 11 is divided into those that pass through the respective delay lines of 1.5H35, 1.0H36, and 0.5H37, and the signal as it is, and is sent to the input terminal a of the switch circuit 38.
b, c, and d, and a delay switching operation is performed by the switch circuit 38. The switch 33 is controlled by a switch control signal 44, and the switch circuit 3
8 is controlled by control signals 44 and 45. As shown in FIG. 23, the control signal is created with the same configuration as in the first embodiment (FIG. 14). The switch circuit 38 is controlled by the control signals 44 and 45 and operates in the same manner as the switch circuit 17 shown in FIG. (Relationships 44, 45, 62 in FIG. 24). As a result, the output of the switch circuit 38 is
As shown in FIG. 24, a reproduced color signal with a delay time of 1.5H, 1.0H, 0.5H, 0, . . . every two tracks is obtained for the input signal of each delay line. Since a delay is sometimes performed for every two tracks, the total delay time for recording and reproduction is 1.5H for all tracks, as shown in FIG. 24 (64). Using the reproduced first index signal 40, the switch control signal 4 is
4 and 45, and the operation of separating and controlling the index signals is the same as in the first embodiment. In the case of a luminance signal, the output of the switch 33 has a delay time of 0.5H, 0, 0.5H, 0, . . . for every two tracks with respect to the input of each delay line, as shown in FIG. A luminance signal of
becomes. Next, we will discuss the case of special playback. During special playback, control using the playback index signal is not performed as in the first embodiment, and the head switching signal and the output signal of the flip-flop synchronized only with the head switching signal are used as switch control signals. Figures 26, 27, and 28 show the results of each track when the color signal recording pattern of Figure 17 and the luminance signal recording pattern of Figure 25 are specially reproduced with the reproduction trajectory shown in Figures 7 to 9. FIG. 3 is a diagram showing the amount of delay of a luminance signal and a color signal. 44, 45, 62, 6
3 and 81 are the same as those in FIG. 26th
83 to 87 show the playback tracks, recording delay times of the chrominance signal and luminance signal, and the recording delay times of the chrominance signal and the luminance signal, respectively, for static reproduction, FIG. 27, 88 to 92 for high-speed reproduction, and FIG. Represents the total recording/playback delay time. In the case of special playback 1, in FIG. 8, from -A track to -A track and
This corresponds to the time of transition from -B track to -B track, and there is a delay in the color signal as shown in FIG. Not done. Since the color signals of every other track are lined up, the continuity of the color signals is maintained. Also, the luminance signal delay is 92, and as above, the luminance signal delay is not switched during playback, and since the luminance signals of every other track are lined up, the continuity of the horizontal synchronization signal is also maintained. . 2, from -B to -A in Figure 7 and - in Figure 9
Corresponds to the transition from A to -B, FIG. 26 85,
The color signal is delayed as shown in FIG. 28, 95. In this case, the color signal switching operation is the same as during normal reproduction, and color signal continuity is maintained. Regarding the luminance signal, 87,
97, and the continuity of the horizontal synchronizing signal is maintained by the same switching operation as during normal playback. Case 3 corresponds to the transition from -A to -B in Fig. 8, resulting in a color signal delay as shown in Fig. 27 90, and the color signal delay in the original pattern is corrected to ensure continuity of the color signal. is maintained. The brightness signal will be like 92,
Similar to the color signal, the continuity of the horizontal synchronization signal is maintained. Case 4 corresponds to the transition from -A to -B in Figure 7 and from -B to -A in Figure 9,
The color signal is delayed as shown in FIG. 26 85 and FIG. 28 95, and the continuity of the color signal is maintained in the same manner as described above. Regarding the luminance signal, see Fig. 26 87 and 28
As shown in FIG. 97, the continuity of the horizontal synchronizing signal can be made normal as in the case of the color signal. Case 5 corresponds to the transition from -A to -A, -A to -A, and -B to -B in Figure 9, and the color signal is delayed as shown in Figure 28, 95. Continuity can be maintained for exactly the same reason. The luminance signal also becomes 97, and the continuity of the horizontal synchronization signal can be maintained in the same way as above. As described above, the continuity of the color signal and horizontal synchronization signal can be made normal in any case of special reproduction. In the second embodiment described above, during recording, the luminance signal is changed to 0, 0,
It was delayed like 0.5H, 0, 0.5H,...
When delay switching is performed every other field as shown in Table 2, adjacent luminance signals are lined up, so adjacent interference can be reduced.

[Table] Furthermore, in the first and second embodiments described above, there is a difference in the total recording and reproduction delay time between the tracks and within the same track during special playback, and there is a difference in the total recording and playback delay time of the luminance signal and the color signal, respectively, and flickering occurs. Image quality deterioration occurs. Therefore, if the same delay switching as for the color signal is performed for the luminance signal during recording and reproduction, it is possible to obtain a good reproduced image with consistent timing. In addition, the delay switching operation for the luminance signal and chrominance signal is not performed after separating both signals separately, but the delay switching is performed with the unseparated video signal during recording, and during playback, the reproduced luminance signal and reproduced chrominance signal are combined. It is also possible to perform delay switching on the reproduced video signal. Also, in the above explanation, a delay line was used as the delay element, but
It is also fully possible to use, for example, a CCD or the like as other elements. Also, during normal playback, the first
However, as explained above, the first index signal is not recorded and each track is A normal color reproduced image can be obtained if the difference in the total recording and reproduction delay time of the signal is 2 kHz and the difference in the recording and reproduction total delay time of each of the luminance signal and the color signal is kHz. As explained above, according to the present invention, PAL
When recording and reproducing SECAM signals, higher density than before can be achieved, skew distortion does not occur even during special playback, and the order of color signals is normalized to obtain sufficient image quality and sound. The present invention has been described above for the case of arbitrary α _H (α _H ≠ n/2), especially α _H =0.75, but the present invention is also applicable to any α _H pattern other than the above α _H =0.75. can. At this time, the delay of the recorded color signal increases by (2α _H + 1) H every two tracks, or
It is sufficient to delay the reproduction color signal in the order of time subtracted by 2kHz, and then delay the reproduced color signal in the reverse order of the recording. For example, when recording one field on one track and α _H = 0.75, 2α _H +1 = 2.5, and the recording color signal will be delayed by 2.5 H every two tracks, or the delay time will be increased by 2 kHz, or the delay time will be increased by 2 kHz. Delaying in order is 0, 2.5H − 2H = 0.5H (k = 1),
5H−4H=1.0H(k=2), 7.5H−6H=1.5H(k
=3), . . . , which is the same as the example.
When the luminance signal is recorded as in the first embodiment,
As explained in the special playback section above, in special playback 1 and 3 (that is, during high-speed playback), the luminance signal advances by [2(t _H +α _H )−m]H at the discontinuous point, and advances by 4
and 5 (that is, during stationary, slow, and reverse playback), there is a delay of [2(t _H +α _H )−m]H. When recording one field on one track, t _H = 312.5, so 2 (t _H + α _H ) - m = 2 α _H + 625 - m = 2 α _H - k, and in the case of 1 and 3, (2 α _H - k )H ahead, and in the case of 4 and 5, it will be delayed by (2α _H −k)H. Therefore, during special playback, in the case of 1 and 3 at the discontinuous point, there is a delay of H (2α _H -k), and in the case of 4 and 5 (2α _H -k)
By advancing by H, the continuity of the horizontal synchronization signal can be made normal. For example, when α _H = 0.75, 2α _H = 1.5, and for each discontinuous point 1.5H − 1H = 0.5H ((k = 1)
It is either delayed or advanced (in the case of 0.5H, both are the same), which is consistent with the example. In addition, in the second embodiment, in addition to making the luminance signal similar to the delay of the color signal, a delay (2α _H ) is added every two tracks.
The delay may be increased by H or by the time subtracted by kH. For example, when α _H = 0.75, 2α _H =
1.5, and the delay time increases by 1.5H for every 2 tracks, or the delay time is subtracted by kH, which is 0, 1.5H - 1H = 0.5H (k = 1),
3H−3H=0(k=3), 4,5H−4H=0.5H(k
=4), . . . , which is the same as the example. Also, for the luminance signal, there is a delay for each track (α _H
+1/2) may be delayed in increments of H or kH less. For example, when α _H = 0.75, α _H +1/2 = 1.25H, which means that every track is 1.25H.
The delay time increases gradually, or the delay time increases in the order of kH minus time, which is 0, 1.25H−
1.0H=0.25H (k=1), 2.5H−2.0H=0.5H (k=
2), 3.75H−3.0H=0.75H (k=3), 5.0H−
5.0H=0(k=5), 6.25H−6.0H=0.25H(k=
6), 7.5H-7.0H=0.5H (k=7), 8.75H-8.0H
= 0.75H (k = 8), ..., which matches the example in the text. The above explanation was for the case of α _H ≠ n/2, but
The present invention can also be applied to the case where α _H =n. For example, when recording one field on one track, when α _H = 1.0, 2α _H +1 = 3.0, and the recorded color signal is delayed by 3.0 H delay time for every 2 tracks, or by the time subtracted by 2 kHz. That is, 0,3H−2H=1H (k=1), 6H
-6H=0 (k=3), 9H-8H=1H (k=4),...
The color signals of every other track can be arranged in this order. During normal playback, delays may be performed in the reverse order. As for the luminance signal, since horizontal synchronization signals are arranged for every other track, a normal signal can be obtained without performing a delay switching operation. Further, the recording luminance signal may be delayed in the same manner as the recording color signal, and the delay may be performed in the reverse order during normal playback. In a pattern where the head rotation direction and tape running direction are opposite, all of the above applies if _αH is made negative. The present invention can also be applied to systems other than those in which one field is recorded on one track by appropriately setting the difference in delay amount between signals and luminance signals for each track.

[Brief explanation of drawings]

Figure 1 shows the current VHS system for PAL and SECAM signals.
Diagram showing TVR recording pattern (α _H = 1.5), 2nd
Figures 4 to 4 are diagrams showing head trajectories during special playback using the recording pattern of Figure 1, Figure 5 is a basic block diagram of the signal processing system for the pattern of Figure 1, and Figure 6 is a diagram showing the head trajectory when special _reproduction is performed using the recording pattern of Figure 1. 7 to 9 are diagrams showing head trajectories when performing special playback using the pattern of FIG. 6, and FIGS.
Figures 13 to 14 are diagrams showing the order of horizontal synchronization signals and color signals, reproduction tracks, and envelopes when special reproduction is performed using the pattern shown in the figure.
FIG. 15 is a block diagram showing an embodiment of the invention.
Waveform diagrams of switch control signals in Figures to Figures 14, No. 16
The figure shows the waveforms of each part in Figs. 13 to 14 and the delay times of the color signal and luminance signal during recording and normal playback. Fig. 17 shows the delay time of the color signal and the luminance signal in the first embodiment of the present invention. Diagrams showing recording patterns, Fig. 18~
20 is a diagram showing the waveforms of each part in FIGS. 13 and 14 and the delay time of the color signal and luminance signal during special playback. FIGS. 21 and 22 are blocks showing the second embodiment of the present invention. Figures 23 and 23 are figures 21 to 22.
FIG. 24 is a waveform diagram of the switch control signal shown in FIG.
FIG. 25 is a diagram showing the recording pattern of the luminance signal in the second embodiment of the present invention, and FIGS. 26 to 28 are the waveforms of each part of FIGS. FIG. 3 is a diagram showing signal delay time. 14, 16-22, 35, 36, 38-44,
77, 79-81, 14-16, 32, 34-3
7,78...day line, 17,33,3
8, 79... Switch circuit, 20, 41... Head switching signal input terminal, 21, 22, 42, 43,
58... Flip-flop, 26... Vertical synchronization signal separation circuit, 28... AND circuit, 30... Index generation circuit, 39, 46... Index separation circuit, 54... Envelope detector.

Claims (1)

[Claims] 1. A PAL or SECAM color television signal to be recorded is recorded on a magnetic tape by alternately using two heads arranged at an azimuth angle of 180 degrees on a rotating body. In a video signal recording and reproducing apparatus configured to sequentially record and reproduce by forming diagonal recording tracks, at least one of the luminance signal and color signal of the color television signal to be recorded is recorded at regular intervals. Or 2kH (k: integer, H: horizontal scanning time)
The color signals of every other recording track are arranged on the recording trajectory by sequentially delaying them with different time differences, and during playback, the reproduced color signals are set at a constant rate opposite to that during recording or by 2 kHz in addition to that during playback. A video signal recording and reproducing device characterized in that output color signals are obtained by sequentially delaying them with different time differences. 2 Record the luminance signal in color television to be recorded at regular intervals without any time difference,
When playing back at the same tape speed as during recording (normal playback), the tape is played back at regular intervals without any time difference.
During special playback, in which playback is performed at a tape speed different from the tape speed during recording, discontinuous points in the playback horizontal synchronization signal are detected, and the delay time of the playback brightness signal is sequentially adjusted using a control signal created based on the detection signal. A patent claim characterized in that the difference between the delay time of the color signal and the delay time of the luminance signal in the total recording and reproduction is always 0 or an integral multiple of the horizontal scanning time during normal reproduction and special reproduction. The video signal recording and reproducing device according to item 1. 3. The luminance signal in the color television signal to be recorded is adjusted at a constant rate or in kH at regular intervals.
The horizontal synchronization signals are sequentially delayed with different time differences and recorded so that they are lined up at least every other track on the recording track, and during playback, the playback luminance signal is set at a constant or constant rate opposite to that during recording.
Output luminance signals are obtained by sequentially delaying them with different time differences in kH, and the difference between the color signal delay time and the luminance signal delay time in total recording and reproduction is always 0 or horizontal scanning time during normal playback and special playback. 2. The video signal recording and reproducing apparatus according to claim 1, wherein the video signal recording and reproducing apparatus is configured to be an integral multiple of . 4 Record one field of signal on one track,
When the two heads are placed at 180 degrees from each other and the horizontal synchronization signal difference between adjacent tracks is α _H , the recorded color signal is in units of 2 tracks [(2α _H +1) − 2k] 2. The video signal recording and reproducing apparatus according to claim 1, wherein the video signal recording and reproducing apparatus sequentially delays each line. (However, if the rotating direction of the head and the running direction of the tape are the same, α _H > 0, and in the opposite case, α _H < 0.) 5. Record one field signal on one track,
α _H
(If α _H > 0 if the rotational direction of the head and the tape running direction are the same, and α _H < 0 in the opposite case, the playback horizontal synchronization signal is By detecting the discontinuity point and using the control signal created by the detection signal,
Each time a discontinuity point is detected, the reproduced luminance signal is delayed by (2α _H − k) lines from before the discontinuity point when playing back at a tape speed higher than that during recording, and when playing back at a tape speed lower than that during recording. Claim 1 or 2, characterized in that during reproduction, the delay time of the reproduced luminance signal is sequentially switched in order to advance the reproduced luminance signal by (2α _H −k) lines from before the discontinuity point. video signal recording and reproducing device. 6 Record one field of signal on one track,
α _H
(If the rotating direction of the head and the running direction of the tape are the same, α _H >0; otherwise, α _H < 0), then the luminance signal in the television signal to be recorded is calculated in units of two recording tracks. (2α _H +1)−k] The video signal recording and reproducing apparatus according to claim 1, wherein the video signal recording and reproducing apparatus records data with a sequential delay of (2α H +1)−k lines. 7 Record one field of signal on one track,
α _H
(If the rotating direction of the head and the running direction of the tape are the same, α _H >0; otherwise, α _H < 0), then the luminance signal in the television signal to be recorded is recorded for each track. 2. The video signal recording and reproducing apparatus according to claim 1, wherein the video signal recording and reproducing apparatus records data with a sequential delay of [α _H +1/2)−k] line by line.