JPS59181887A - Editing device - Google Patents

Abstract

PURPOSE:To prevent the deterioration in the spatial image resolution of a luminance signal by applying a chrominance carrier signal to a signal processing circuit whose phase is inverted at each other frame and applying the obtained luminance signal and chrominance carrier signal to a luminance/chromaticity mixing circuit so as to mix them. CONSTITUTION:A signal processing circuit 113 controlled by a control circuit 109 of a time axis error correcting circuit consists of a delay compensating circuit 114, a selector 115, a luminance/chromaticity separating circuit 116, a signal processing circuit 117, and the luminance/chromaticity mixing circuit 118. The signal processing circuit 117 is controlled by a control signal so as to invert the phase of the chrominance carrier signal at each other frame or pass through as it is. The selector 115 changes over a frame still color video signal from the delay compensating circuit 114 and a frame still color video signal from the luminance/chromaticity mixing circuit 118 by means of the control signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an editing device for editing frame still color video signals.

BACKGROUND TECHNOLOGY AND PROBLEMS For example, when reproducing methylated images using a VTR, even if it is a direct color process VTR such as a broadcasting VTR, in order to achieve correct color reproduction regardless of discontinuity of color subcarriers, it is necessary to The following signal processing was performed on color video signals. That is, a color video signal is once separated into a luminance signal and a carrier chrominance signal, the phase of the carrier chrominance signal is suitably inverted or non-inverted so as to maintain the continuity of the color subcarrier, and then the luminance signal is separated into a luminance signal and a carrier chrominance signal. In addition, in recent VTRs, the rotating magnetic head is moved in a direction almost perpendicular to the scanning direction using an electro-mechanical conversion element such as a bimorph. A method has been proposed that enables reproduction of frame methyl images by controlling displacement. Even in this case, normally the frame methyl color video signal is separated into a luminance signal and a carrier color signal as described above, the phase of the carrier color signal is suitably inverted or non-inverted, and then signal processing is performed to mix them again. was. The reason for this is that in the case of an NTSC or PAL television signal, one cycle of color subcarriers cannot be completed with only one frame of color video signal, and color reproduction is impossible as it is.

However, signal processing that separates a color video signal into a luminance signal and a carrier color signal and inverts or non-inverts the phase of the carrier color signal causes deterioration of the characteristics of the color video signal, that is, deterioration of the image quality of the playback screen. This is the result. In particular, when the same color video signal is subjected to repeated signal processing, such as when editing a color video signal, the characteristics of the color video signal deteriorate accordingly.

Furthermore, when separating a color video signal into a luminance signal and a carrier color signal, a low-pass filter or a comb filter with better performance is used, but in either case, the spatial resolution of the luminance signal deteriorates and unnecessary signals are mixed in, the waveform characteristics deteriorate, and various signal deteriorations such as time delay of the carrier color signal, deterioration of the color band, and crosstalk between line signals occur.
In view of this, the present invention provides an editing apparatus that corrects the time axis error of a frame still color video signal and edits it after editing, which can receive the frame still color video signal as a good image on a monitor, and The purpose of the present invention is to propose an editing device that can edit and record without deteriorating the characteristics of the image.

Summary of the Invention The editing device according to the present invention supplies a frame still color video signal reproduced from a reproduction side VTR to a time axis error corrector to correct the time axis error, and then supplies it to a monitor receiver and also to a recording side VTR. In the editing apparatus, the time axis error corrector adjusts the phase of the carrier color signal by frame when the frame still color video signal is repeatedly and continuously reproduced from the reproduction side VTR. The frame still color video signal processed by the signal processing circuit is supplied to the monitor receiver, and the frame still color video signal, which is not processed by the signal processing circuit, is recorded as is. It is designed to be supplied to the side VTR.

According to the present invention, in an editing device that edits a frame still color video signal after correcting the time axis error, the frame still color video signal can be received on a monitor as a good image, and the deterioration of signal characteristics can be prevented. It is possible to obtain an editing device capable of editing and recording without the need for editing.

Example An embodiment of the present invention will be described below with reference to FIG.

(loz) c playback side v'rR1 (102) id fill VTR teal. (103) fd both VTR (
101), (102) wofl+II ml l,
, and is still a control device that supplies reference synchronization signals, reference clock signals, etc. to each of them.

(104) is a time axis error corrector to which a color video signal obtained by FM demodulation from the reproduction side VTR (101) is supplied. This time axis error corrector (104) is configured so that the frame still color video signal is
A signal processing circuit (106) is provided for inverting the phase of the carrier color signal of the frame still color video signal every other frame when the frame still color video signal is repeatedly reproduced seven times in succession. This signal processing circuit (106) includes a luminance/chromaticity separation circuit, a phase inversion/non-inversion circuit for carrier color 1n, a luminance/chromaticity mixing circuit, and the like.

SW is a changeover switch for switching between a frame still color video signal processed by the signal processing circuit (106) and a frame still color video signal not processed. This changeover switch SW is
It has a movable contact a and fixed contacts 1) and C. Fixed contact 1
] is connected to the terminal T from which the frame still color video signal processed by the signal processing circuit (106) is obtained, and the fixed contact C is connected to the terminal T from which the frame still color video signal signal processed by the signal processing circuit (106) is obtained. is connected to terminal T2. Also, frame still color video signal +r from movable contact a:! , , are supplied to the recording side VTR (102) and the monitor receiver (107). 3 (105) is a time axis error corrector to which a color video signal obtained by FM demodulation is supplied from the recording side VTR (102). Then, a signal-processed frame still color video signal is obtained from a signal processing circuit (106) similar to the signal processing circuit (106) of the time axis error corrector (104) at the terminal T3, and this is directly transmitted to other monitors. (ios).

Also, from the playback side VTR (101) to the recording side VTR (102)
) are provided with subcarrier status signals 5C-8T representing the phase states of the color subcarriers. Recording side VTR (10
2), the recording preparation signal RR is supplied as a control signal to the changeover switch SW of the time axis error corrector (104).

Next, referring to FIG. 2, the time axis error corrector (10
The configuration of 4) will be explained. Playback side VTR (101)
The FM demodulated color video signal obtained from
Using the write clock signal from the C circuit (109A), it is written and stored in the memory (111).

The frame still color video signal written in this memory (111) is read from the read clock (g) from the read clock AFC circuit (09B) of the control circuit (109).
It is read out using the number. In this way, the time axis error of the first word of the frame still color video input with the digital signal is corrected. Furthermore, this memo! The frame null color video No. 3 read out from J (111) is supplied to a dropout correction processing circuit (112), subjected to dropout correction processing, and then supplied to a word processing circuit (113). .

These memory (111), dropout correction processing circuit (112) and signal processing circuit (113) are all f5
1] Controlled by a controller (110) of a control circuit (109). Excellent read clock AFC circuit (109B
) The readout clock signals of 75 and others are processed by the signal processing circuit (
113). Then, the signal processing circuit (11
3) outputs a digitized frame still color video signal that has been processed to maintain time axis error correction, dropout correction, and continuity of the carrier wave (No. 77).

Next, the configuration of this signal processing circuit (113) will be explained with reference to FIG. The digitized frame still color video signal is provided to a delay compensation circuit (114) and a luminance/chromaticity separation circuit (116). Delay compensation circuit (11
The frame still color video signal from 4) is supplied to a selector (115). Furthermore, a luminance chromaticity separation circuit (1
The luminance signal and carrier color signal from 16) are processed by a signal processing circuit (117) that inverts the phase of the carrier color signal every frame.
), and the obtained luminance signal and carrier color signal are supplied to a luminance/chromaticity mixing circuit (118) and mixed. The frame still color video signal obtained from the mixing circuit (118) is supplied to the selector (115). Further, the signal processing circuit (117) is controlled by a control signal to invert the phase of the carrier color signal or to pass it through as is. Furthermore, the selector (115) is connected to the delay compensation circuit (1
The frame still color video signal from 14) and the frame still color video signal from the luminance/chromaticity mixing circuit (118) are switched by a control signal.

Next, the operation of this editing device will be explained. Playback side VTR (1
When supplying the frame still color video signal obtained from 01) to the recording side VTR for editing and recording, the movable contact a of the switch SW of the time axis error corrector (104) is switched to the fixed contact side, and the playback is started. After correcting the time axis error of the FM demodulated frame still color video signal from the side VTR (101) and processing the signal in the signal processing circuit (106), it is supplied to the monitor receiver (107) for editing and recording. Check the frame still color video signal. After you are ready to record,
Recording side VTR (102) Color (i?v is control 1iH
t (103) empty) is supplied to the changeover switch SW of the time axis error corrector (104), the movable contact a is switched to the fixed contact C side, and the recording preparation signal RR of the reproducing side VTR (101) is supplied. The obtained FM demodulated video signal is corrected for the time axis error by a time axis error corrector (104), and is supplied as it is to the recording side VTR (102) without signal processing by the signal processing circuit (106). Edit and record on Yamaki tape.

Note that with the configuration shown in FIG. 1, it is not possible to simultaneously receive the frame still color video signal to be edited and recorded on the monitor during editing and recording. If the signal is directly supplied to the monitor receiver (107) and the frame still color video signal from the terminal T2 is directly supplied to the recording side V'I'R (102)K, the monitor receiver can be received at the same time as editing recording. It becomes possible.

Now, for example, when editing and recording a large number of frame still color video signals with explanatory audio recorded on a video disc, the discontinuity of color subcarriers between different frame still color video signals is ignored. do,
Edit and record without any conditions.

However, when importance is placed on the positional accuracy between consecutive signals even for frame still color video signals such as animation images, the recording condition of the recording side VTR (102) is that the magnetic tape to be edited and recorded is CTL above
It is necessary to match the color framing of the signal with the color framing of the frame-by-frame color video signal to be recorded.

Therefore, in this case, a detector for detecting the state of the color subcarrier is provided inside the recording side VTR (102), and the recording timing in the recording side VTR (102) is controlled by the detection signal, and the magnetic tape is It is necessary to edit and record the frame still color video signal by preserving the color frame on top. That is, in simple still image recording of an image signal from a camera, etc., the reproduction CTL is fixed and the color framing on the recording side changes alternately.
The detection signal of the phase state of the color subcarrier becomes a 15 Hz pulse.

In addition, when editing and recording a frame methyl color video signal that is an image to be recorded as a still image without going through a signal processing circuit, a detector for detecting the phase state of the color subcarrier is also installed on the playback side VTR (101). It is necessary to establish a color scheme and compare it with a standard color frame. Then, the comparison output is transferred to the recording side V.
The signal is supplied to the TR (102) and controls the recording signal gate circuit. By doing this, the frame still color video signal to be supplied to the recording side VTR for recording can be transferred to the playing side VTR.
When recording by switching frame still color video signals from the TR (101) and a television camera, recording with accurate color framing can be easily performed.

This point will be explained with reference to FIG. Figure 4 A is X
Color framing PB- on the playback side of frame PR-x
CF, and FIG. 4B shows the reference color subcarrier REF-8C with which it is to be compared. 4A and 4B show the case where the color framing of the X-th frame PR-x is in reverse phase with respect to the reference color subcarrier REF-8C. Fourth
Figures C and D are the color subcarrier REF of the reproduction side color framing PB-CF of frame FR-x of mx@LA.
-8C and the case where it is in phase are shown. And record 1
jlV'lR, for example, the Cth track of the trunk immediately before the track to be recorded on the magnetic tape of
If the color framing I(, EC-CFn, of the n-1)th frame PR-(n-1) matches the reference color subcarrier JtEF-8C of FIG. 4F,
Figure 4. The n-th frame F to be recorded in the trunk next to G.
If the recording color framing 1tEc-CF of 几-n is out of phase with the base color subcarrier REF-CF shown in FIG. 4H, the recording gate circuit is closed and no recording is performed, and If they match as shown, the frame still color video signal of the Xth frame in FIG. 4C is recorded by opening the gate circuit.

Next, referring to FIG. 5, the recording side VTR (1) in FIG.
An example of 02) will be explained. Furthermore, the playback side VTR (101)
I also used the VTR shown in Figure 5 and got it.

ffi 5 Figure VTR, SMPTE (7'C type V
This is an improvement made by setting TR to -i books. In FIG. 5, (1) is a magnetic tape, which is guided to be wound diagonally on a tape guide drum (2) in an Ω winding manner. tape(
A control signal is recorded in advance on the side edge of 1). This winding has an angle close to 360°. Tape (1
) on the tape guide drum (2), that is, the inclination of the winding.
1, (regulated by 61.

The tape guide drum (2) is composed of a rotating upper drum (3) and a fixed lower drum (4). (7a) is a recording/reproducing rotary magnetic head, (7b) is an erasing rotary magnetic head, and these heads (7a) and (7b) are connected to a rotating upper drum via a common electro-mechanical transducer (8) such as a bimorph. (
3), it can be displaced in a direction substantially perpendicular to the scanning direction. (9) is a drum motor that rotationally drives the rotating upper drum (3), and is attached to the drum (3) via a shaft (Ill). γ indicates the rotation direction of the rotating upper drum (3). show.

As shown in Figs. 6 and 7, the heads (7a) and (7b) have ring-shaped cores RC3+RCb, each of which is wound with a coil "at"b, balanced winding in the former and single winding in the latter. . Coil Lbl-1: In order to avoid crosstalk between the erase signal and the recording signal, the coil Lbl-1 is wound around the leg of the core RCb that is remote from the head (7a). A gap Ca of the head (7a) is provided at the center of the core RCa. Gap G I) of head (7b) is core R
It is provided on one side of cb near the head (7a).

The gear ring Gb of the head (7b) has an azimuth relative to the gap Ga of the head (7a), and is wider than the gear gap GaK of the head (7a). Furthermore, core RC
The distance d between the opposing parts of a and Rcb is about 2", making them close together (111 is a control magnetic head (wound magnetic head), 02 is a capstan, and (13) is this capstan a2. This is a capstan motor that rotates.The ring is a pinch roller that rolls into contact with the capstan coffin via the tape (1).The tape (1) is held between these capstans (1) and the pinch roller ring, and both By rotating the tape u+ +d motor (1
3) The vehicle is caused to run in the direction of arrow α at an arbitrary running speed depending on the rotation speed. In the case of the double capstan system, the tape (1) is made to run in the forward and rain direction at an arbitrary running speed.

(15) is a time axis expansion/contraction processing circuit on the recording side, to which a human video signal from an input terminal (16) is supplied. This circuit 06) is a synchronization separation circuit that separates the vertical synchronization signal (5QI(z) in the case of the NTSC system) from the 4# input video signal (video signal that has not been subjected to time axis expansion/contraction processing) fed to the input terminal (16). (15a).This vertical synchronization signal is a reference synchronization signal from a synchronization disc, and is obtained both during recording and reproduction.

07) is a servo circuit for the drum motor (9). The drum motor (9) has signal generators (magnetic poles (magnetized magnet wheels) and magnetic heads ( For example, a thin-film magnetic flux detection head) is provided, and these signals are supplied to a servo circuit (17). Further, the servo circuit (17) is supplied with a vertical synchronization signal (reference vertical synchronization signal) from the synchronization separation circuit (15a) of the processing circuit (151), and each signal from the signal generator of the drum motor (9) is applied to this signal. Vertical synchronization (ff
The rotation of the drum motor (9) is controlled by the force of this servo circuit a so that the drum motor (9) is reliably locked to the number i. In this case, the rotating upper drum (3) increases with the running speed of the tape (1).
) so that the rotation does not fluctuate.

(18) is an input terminal for a speed command signal that commands the running speed of the tape (1), which is generated when the operator operates a push button or the like of the speed controller, and this speed command signal is sent to the microprocessor 09). and a tape running speed control pulse generator (a), which are respectively flil-controlled. A pulse from a pulse generator is supplied to a servo circuit Qv for a capstan motor Q3. , and a control signal from the microprocessor θ is also supplied to the pulse generator.

At @, there is a position detector that detects the running position W of the tape (1) (running position in the longitudinal direction of the tape). 031, motor θ
■, that is, a frequency signal generator (a stable bar (for example, 96
The frequency signal from a magnetic head (eg, a pleural flux sensing head) is supplied to a position sensing circuit. This position detection circuit (
b) Now 11 With the advent of control, tape (1
) is detected, and the detailed running position of the tape (1) is detected based on the frequency signal. Position detection from the position detector (2) (Fi 11) is supplied to the microprocessor (19) and servo circuit (211).

In addition, the recording (till) time axis expansion/contraction processing circuit αυ receives the frequency signal from the frequency signal generator of the capstan morph, and performs time axis expansion/contraction processing of the video signal according to the frequency. Based on the error signal from the circuit ■υ, the entire phase of the VITEOI 2iM is corrected.

SWl, SW2 and 5W3ij recording/mutual changeover switches are used to turn off and follow the recording of the movable contact m1 and the fixed contacts p and r on the western side.

(Foundation) I', ll, Rotating magnetic head (7a), (7b
), the output terminal (sha) outputs a drive signal to the converter element (8), and the head (7)
a head that raises the head in a direction perpendicular to the scanning direction;
This is a drive circuit. This head drive IJj circuit @ receives a flyback pulse from the drum servo circuit and generates a triangular wave drive signal whose phase is fixed by b1.
Based on the frequency difference between the frequency signals from the frequency signal generator of the cab scan motor α4 obtained via the switch SW1 during recording, the head displacement control circuit (described later obtained via the switch swl) is generated during the town life. (34) The capstan servo circuit (217 Error from 4
Based on the No. 3 V difference, the off-cent level of the triangular wave drive signal is determined based on the phase of the horizontal synchronization signal from the head displacement control circuit diagram obtained through P'2. Control 3. Next, explain H9 about the edict timing control circuit.Hiroshi, J uses the modulator, edict, and nail type width device to convert the color video from time 11) and the expansion/contraction execution circuit 0!ll. Then, it is converted to 1i5i wavenumbers and amplified 7, and by pressing switch SW3, the edict is transmitted from the output terminal ψ through a rotary transformer (not shown), and recorded as a nail Irogo. 137) is an erase signal generation circuit (oscillation 2:1), and the erase signal from this (generates a frequency slightly lower than twice the FM carrier frequency) is output to the output terminal. ) is supplied to the erasing rotating magnetic head (7b).
The erase signal generation circuit (3) is controlled by the gate signal of the g generator (a) and the gate signal, and the recording/erasing timing and recording/erasing cycle are controlled.
(g+'i generator @ - Controlled by microprocessor QQ. Kan and Kanha are the framing discrimination circuits, of which (c) is the input terminal (processing circuit (I also controls)) The input terminal head (processing circuit a5) is also p
, l) is a color framing discrimination circuit that receives a video signal and discriminates its color framing. Then, the discrimination outputs of these discrimination circuits (a) and 2) are sent to the microprocessor 0. In addition, this microprocessor a9 has a synchronization component 1 of the time axis expansion/contraction processing circuit 0.
Vertical synchronization from the same route (15a)
A) is supplied. (31υ is for playback mode assistance,
From the control signal from the control head 9υ (including the color 7 raming corresponding to each inclination and rack, or the odd and even take of the field), the output circuit detects the take, and the detected output is sent to the microprocessor. Supply to Kan.

Also, reproduction 1a from the recording/reproducing rotary magnetic head (7a)
The video signal is supplied to a regenerative amplifier and a video signal via a switch SW to be amplified, and the video signal is demodulated to produce a composite color video signal. , this is supplied to the time axis reduction processing circuit G on the reproduction side, converted to the time axis iF, and outputted to the output terminal (3, 3).

In particular, the composite power from the amplifier and the n frequency generator 43+1 (the horizontal synchronizing signal in @+5 is supplied to the head displacement control circuit (a)j. Also, this head displacement!b control circuit -) is 1. From the input terminal (351, (A), 1 recording/reproduction 1... the reproduction signal of the magnetic head (7a) (the envelope signal of the high frequency (i)) and the air-mechanical conversion Yonago (8)
A machine like a strain cage added to -? The distortion detection device (element (8))
A detection signal (signal for detecting the state of suspension) is supplied, respectively.

Next, what about the Hiteite system in Figure 1? , see also Figure 8 for the operation during recording. Each movable contact of switches 5WI-8W3 is switched to the fixed contact I on the needle side.
A speed lower than n, i.e. the standard speed S. The video signal from the input sentence 1 and child 0 is transferred to the tape (1
Consider the first day of the week to be recorded on the page. In Figure 4, (1)
indicates the same magnetic tape as in Fig. 1, and CTL indicates the tape (
1) shows control coefficients recorded in advance at equal [B] intervals. The inclined track (indicated by a solid line) is shown when the boat is sailing at the standard speed Sn, and T/
shows the inclined track (indicated by a broken line) when the tape (1) is running at the standard speed Sn.

However, this video year recording and playback device ftQ (VTR
) and [, when the running speed of tape (1) is Sn,
An inclined trunk '1' with the same inclination and same length as the inclined track when the tape (1) is running at standard speed SO
1 nail of Video No. 18 is made to form on the tape (1). In FIG. 8, α indicates the running direction of the tape (1), and β indicates the scanning direction of the head (7).

Therefore, a speed value No. 3 indicating that the running speed of the tape (1) is 1Sn (m can be arbitrarily selected) is supplied to the input terminal (2). In this way, the pulse generator (3) generates a pulse with a frequency that is twice the pulse frequency Fn that occurs when the tape (1) is at the standard running speed Sn, and this is transmitted to the capstan servo circuit (121). be supplied. Thus, the tape (1) is driven to run by the capstan (2) and the pinch roller 04) so that it continues to run with a length of -8n. This tape (
1) Traveling speed -8゜tl, Fukuyoburosenoza (19
) from the TI pulse generator body) to control the speed change (M or no sleep, no change).

In this case, the capstan is driven at a certain tape speed FD-range lower than the standard recording/playback tape speed, thereby moving from a position near a certain recorded track to the next adjacent trunk to be recorded. Move all the way to line i. At this time, the tape after 111 that moves to the adjacent track position in a short time and reaches the adjacent trunk position without crossing the track 1l = ij distance of that location and reaching the adjacent trunk position. Capstan@I control that targets a tape speed such that the speed can be maintained at a constant tape speed (including stationary) well below the standard recording 444 raw tape speed. Do the following.

In addition, the time curve axis expansion/contraction processing circuit Oi'i) applies a unit signal of the human video signal, that is, l, to the inclined track T in FIG.
The human video signal is expanded so that exactly 1 minute (1 frame is also possible) is recorded, and the tilting track T with reference to the control track C4''L on the tape (1) is expanded. The phase of the expanded video signal is adjusted based on the error signal from the capstan servo circuit Qυ so that the timing of the arrival position vortex ′ of controlled.

The head drive circuit also includes a drum servo circuit a, a frequency signal generator for the capstan motor 0, and a capstan servo circuit Qυ to ensure that the heads (7a) and (7b) scan the inclined trunk T. controlled by
11. Of course - drives the mechanical switching element (8). Head (7
a) A focusing head that scans one more track T at a certain time to record the video signal of a certain field, and then scans the adjacent inclined track T to record the video signal of another field. (7a) and (7b) alone, the head of the head can be moved by one track P'(il-scanning end 21). by tape (1)
, 1 Traveling speed slightly changed from -Sn, head (7a), (
7b) allows the target inclined track T to be inspected.

Therefore, tape (1) has 12, heads (7a), (7b
) Its travel is controlled in such a way that it can reliably scan a predetermined diagonal track T by means of a possible range of displacements.

With the variable θ converter 1 and the recording stage width device 1, the gate 1 from the signal generator (a)
8 (which is controlled by the microprocessor 0), the time [Ki] axis expansion/contraction processing circuit α
The supply/non-supply of the video signal whose time width has been expanded/contracted by 1 from 0 to 7a is controlled by :ti.

υ1-I, 1 of the video m from the processing circuit a.
Video No. 111 of one field is extracted for each argument field close to Iη, and the switch SW
3 to the head (7a).

When trying to record color videotape number 1 to tape (1), continuity of color framing is maintained and the color video code is sequentially recorded on each inclined track TVCNd.
As shown in the image, the video signals from the processing fi11 circuit Qυ are selected field by field based on the discrimination output of the color framing half Ij separate circuit.

Furthermore, when recording a monochrome video signal on the track 7' (1), the monochrome video signal is recorded on each of the 111th inclined tracks '1' while maintaining the continuity of the odd-even framing of the field. Based on the discrimination output of the odd-even discrimination circuit I1, the processing M1 circuit α5
) to select video titles from field by field0
, Figures 9 and 10 show the recording -l'r++ dague speed 1
．． 14 and any position, it is possible to record it in one pattern by controlling the head height vector P and the Hakuzuki-sun phase vector V'. obtain. It is a vector diagram showing j1.

Standard Hr + recording speed vector ■r to 1, [i U1 but Henodol to speed vector ■h and Arp speed vector vt
is the composite vector of Now, assuming that there is an arbitrary recording speed Roux vector (■r) at an arbitrary position, the vector (■r) can be obtained by adding the speed correction vector Δf to it.

On the other hand, the positional deviation vector Δlfr;I on the tape (1)
:, By combining the video signal phase component vector (B) and the trunk vertical movable head displacement vector (Δ1), J can be stopped.

Furthermore, as can be seen from 19101nj, the above Δf is Δ
By combining the values of P and ΔF at 1b'01, V, and 2h are obtained.

Here, the Δ group Δf = a + b2. . world, a
−ichifalldi ゝdψ b−=■.

1 Thus, a certain path ((μ″'f”j
i・〃lower speed than L)Instead of the inclination of 11・rack Ip/, in the middle, ljf(”'+: 4 speed H1
A track ``1'' can be formed on the tape (1) at the same time as 1dl.

Next, we will discuss the p♂ vibration force in the tape running system. Special←(
= When making the tape stand still or moving it backwards, the possibility of controlling tape tension and tape kiting should be checked from the bottom up.
Becomes 1.

For example, assume that the tape is running in the forward direction in an SMPTE type C VTR. At this time, the distribution of tension T on the drum is calculated as follows: ll'lo: Tension at the tape inlet μ, coefficient of friction at the solid force part 0rnax: The moment when the tape runs in the opposite direction , tension ゛I''
(The distribution of will change completely as shown in the following equation. , 62 ′■゛(θ)== TIN, , e2θmaxThen, the difference between the moment the tape comes to rest and the trench running in the opposite direction. The tension division is -'A = toe. Simply put, it can be said to be the state edge that can produce a distribution curve of the number of weights.

When an elastic body in contact with a solid friction surface is strained by its frictional force, the strain distribution is determined by the equivalent frictional force and the equivalent modulus of elasticity. This is because it has the property of preserving a free distribution state within the range of .

For example, the distribution i1', +, * at the moment when the tape comes to rest is
; J period distribution meter It should belong to one of the equations 3). However, as the table row stops, the tension on either the entrance side or the exit side of the tape relative to the drum increases.
If either of them were to change, how would the intermediate distribution change? However, the ribbed distribution surface a that connects the tension on the entrance side and the exit side in a continuous manner! 6. L is not easily published. For example, one corner of a sand mountain made of smooth sand collapses, creating another sloped part.
As a result, it is appropriate to think with the assumption that it will be possible to deal with the tensions on both sides.

A continuum whose shape is held by solid friction.
, it exhibits a truly open-type hysteresis (history) phenomenon, and as a result, its shape as a continuum can have discontinuity (diversity) in its inflection limits. 1. The shape of the sand mountain mentioned above is similar to the shape of the sand pile indicating countless fats. Moreover, these hysteresis are stopped by external micro-vibration disturbances, etc., and it cannot be avoided that they will return to the ground state someday, for example, in a manner similar to the flattening of a sand mountain.

In short, if you want a uniform distribution on the drum surface that is exactly the same as when recording, you must comply with the following Article 4A. In other words, one thing to note in the middle of recording is that you must not change the tape culm/rubbing direction in the slightest just before recording. In order to ensure this, it is necessary to record while the tape is running at low speed, or to force the tape to overshoot and stop the tape gradually, and to record immediately before the tension is relaxed. Must be.

Note that the tape during recording is not limited to running at a constant low speed, but may be running intermittently. In this first go, in the flow of the I-sango to be discussed,
one field i) or frame or one other one
Only a single block section in the No. 6 sequence is recorded. After recording a single block &;I, immediately stop recording or at least provide a pause interval. Furthermore, at least after the recording of a series of signal blocks is completed, a command is given to stop the cab scan drive, thereby at least an I! L.I.
Iiii! The tape is stopped between - and waits for the next trunk recording command at that position. At this standby position IP, after recording, the next track is recorded by the next recording command.
'i = do.

Next, we will explain the operation in the case of rewriting a part of the video worshipers recorded on the recorded tape with a new video signal in the loading mode shown in FIG. , this recorded tape is processed by the apparatus tgt shown in FIG. PTE
% speed of tape by Type C VTR
Even when the video signal is recorded normally in the line, it is white.

L-zu, switch SW, ~SW3 movable contact, 41m
Switch to Aioi 114N fixed contact p, set it to playback mode, plan, play the finished tape video (No. decide.

In this case, the tape l'+,
The IFII missing pulse is generated from the pulse light cow device )), and the tape (1
) (7a)
.

(7b) is the inclined trunk T-i where the video signal is distributed.
In order to ensure scanning when the tape (1) is stopped, it is controlled by the drum servo circuit 0'/) and the head displacement control circuit (34) to drive the electric machine rod and converter (8). do.

1 to Machio No. 18 from the head (7a), switch SW3
The raw amplification number and the grain translation device are supplied to the target P through
After the FM demodulation of the M-modulated color video signal is performed, the time warping processing circuit (supplied to the three power...) axis correction,
It is output to the output terminal 3) and is output to the monitor receiver (not shown).
It will be played at.

In this way, when 1511 minutes of the video signal recorded on the recorded tape, for example one frame worth of video signal, has been determined, the running of the tape () is stopped. Switch to recording mode with switch SVV
, − Each movable contact m of SW3 is
Switch to The operation of the apparatus of FIG. 1 in the recording mode is as described above. However, video No. 18, which should be taken seriously, must be erased before being recorded. Therefore, the erasing signal is generated from the 7 "1 erasing number 1 generating circuit 07) at substantially the same timing as the recording session number 1, and is supplied to the erasing head (7b).

Also, a recording/reproducing head (7a) and an erasing head (7b)
1. Until the tape (1) stops running, the air-mechanical conversion element (8) moves the two inclined tracks T on which the video signal for one frame to be replaced is recorded.
'f: llri next scan is performed, thereby erasing and recording one frame worth of video signal. In this case, the head drive circuit generates a head drive signal (Lj) with a constant slope over the recording period of the video signal for 1 frame/- frame. )
supplied to

In addition, when trying to rewrite and record color video No. 48 on a recorded tape (1), 1, the continuity of color framing is maintained and the color video signal is As recorded, the loading circuit L
3911i? The video signal from the processing circuit Q5 is selected field by field based on the color framing data of the recorded video information detected by the video signal.

Furthermore, when a monochrome video signal is to be recorded on the tape (1), a detection circuit is required so that the monochrome video signal is sequentially recorded on each inclined track T while maintaining the continuity of the odd-even frame of the field. Based on the odd-even take of the field of the recorded video signal detected in , the video signal from the processing circuit J is selected field by field.

After re-recording the video signal of the recorded tape (1) as described above, if you switch to the playback mode again while the tape (1) is stopped, the video signal that was re-recorded will be played back as a still image. You can check it.

The video signal recorded in this way is 1.0 degrees even at 0 degrees. □
: Of course, it is possible to change the recording.

Note that the number of rotary heads (for example, two), the angle at which the tape is wound around the tape guide drum (for example, 180'), etc. are not limited to the above-mentioned example, and are arbitrary.

Further, the recording and reproducing rotary magnetic heads may not be used in combination, but may be separate heads. In this case, these heads may be attached to the commercial/mechanical converter and may be one common unit or separate units.

The above-mentioned editing device is capable of receiving the frame still color video signal as a good image on a monitor in the editing device that edits the frame still color video signal after correcting the time axis error, and also prevents deterioration of the signal characteristics. It is possible to edit and record the data with the following. In other words, there is no deterioration of the spatial resolution of the M number, no mixing of unnecessary signals, no deterioration of waveform characteristics, etc., and no signal deterioration such as deterioration of one color band due to delay of the carrier color signal or interference between lines. Even if they are repeated, there is no excuse for deterioration of those characteristics.

Effects of the Invention According to the present invention as described above, in an editing system for editing a frame still color video signal after time axis error correction,
The frame still color video No. 16 can be received on a monitor as a good image, and an editing process that can be edited and recorded without deteriorating the signal characteristics can be obtained. That is, there is no deterioration in the spatial resolution of the luminance signal, no contamination of unnatural signals, no deterioration in waveform characteristics, etc., and no problems such as delay in carrier color separation, deterioration in color bands, crosstalk of line 117, etc. There is no deterioration of No. 1, and there is no risk of the deterioration accumulating even if No.

Figure 1 is a block diagram showing an example of the editing device according to the present invention; ：That time axis section difference sleeve correct device (
104), FIG. 3 is a block diagram showing the configuration of the signal processing circuit (113) in FIG. 2, and FIG. 4 is a waveform diagram for explaining the operation of the editing device 1. ,
FIG. 5 is a block diagram showing an example of the VTR used in the present invention, and FIGS. Figures 8 and 9
Figure 1 shows the recording pattern on the tape.
Figure 0 is a vector diagram.

(101) , (102) iL each S main side & Q”
We installed the expansion side VTR1 (104) and (105) respectively 1] Raw i μ II and h1 pre-expansion side nJ axis error corrector, (
107) and (108) are monitor receivers on the reproduction side and recording side, respectively.

Claims (1)

[Claims] The frame still color video signal reproduced from the reproduction side VTR is supplied to the time axis error corrector to correct the time axis error, and then supplied to the monitor receiver, and also to the recording side VTR for editing and recording. In the Shishida editing device, the time axis error corrector generates a signal that inverts the phase of the carrier color signal every other frame when the frame still color video signal is repeatedly and continuously reproduced from the reproduction side VTR. The frame still color video signal processed by the signal processing circuit is supplied to the monitor receiver, and the frame still color video signal not processed by the signal processing circuit is directly transmitted to the recording side VTR. An editing device characterized in that the editing device is configured to supply a