SU1242004A3 - Device for recording colour picture television signal - Google Patents

Abstract

The invention provides an increase in recording density. The full video signal is fed to the low-pass filter 1 and the band-pass filter (PF) 7. The luminance signal allocated by the low-pass filter 1 through the LPA 2 and the amplitude limiter 3 is fed to the frequency modulator 4. The signal from the frequency modulator 4 through the high-pass filter 5 arrives at the adder 6. To the other input of the adder 6, the color components of the full video signal are allocated to the P 7 and passed through the mixer 8, PF 9 and the key 27. The key 27 provides for the transmission of sequential chrominance lines. The control signal for the key 27 p. : The pulse shaper 14 and the control unit 21 are detected by frame and line clock pulses allocated by the selector. 11 pulses from a full video signal. The output signal of the adder 6 through the recording amplifier 28 is supplied to a block 29 of rotating magnetic heads for recording on a magnetic tape. A device is also proposed for reproducing a television signal of a color image recorded on a magnetic tape. Зз.п. f-ly. 19 il.,, F CO s ij tc 4i CM IPut I

Description

This invention relates to; a magnetic television signal with a color image, in particular with a television signal in chess order on non-adjacent parts of the track.

The purpose of the invention is to increase the recording density.

The pa of FIG. 1 is the structural, electrical circuit of the device for

recording a television signal of a color-modifying device for reproducing an image: in Fig. 2, the amplitude frequency characteristic of a filter of their lower frequencies; PA fig.Z - amplitude. frequency response of the high-pass filter: in FIG. A, timing diagrams explaining the operation of the device for recording a television color signal of a picture; Fig. 5 is a structural electrical circuit of the first modification of the device for recording a television signal 1 of a wind image:; on php .b - temporary; .1, and ramgr, —that the first modfandp of the device for recording the television on TV with a digital image that shows the bot: g; e1P1; in fig. 7 is a view of a magnetic mite with a zapsu of this deposit with an az1a-1-watt angle 90; pas figs. 8 - the same, with azimuthalkh angle, not equal to pa of figure 9 - view 1-a g of 1 tape with recording of signals in a checkerboard pattern, when the angle between the direction of movement of the magnet-: noii tape and the direction of recording of the siggle along dorol; g less than 90; in fig. 10 - the same, when the angle between the direction of the liepei-iemeFnm of the magnetic mite and the paralipia of 1P1C and SCG} went along the path: the distance of more than

90; pa fpg. I

azimuth angle

Dates 1 ik when recording a television signal; on file1 .12-azimuth angle of the sensor during reproduction of the television signal; Fig. 13 is a block diagram of a device for reproducing a television color image signal; FIG. 14 shows time diagrams that show the operation of a device for reproducing a television.

color image signal; in fig. 15 is a structural electrical circuit; a scheme of the first mod- fication of the device, t; l in the production of the television sigpal color image; on (J.iHi. 1 6 is a structural electrical circuit of a device for engaging maleopochromatic materinals; FIG. 17 is a structural electrical circuit of a second modification of the device for recording a color television signal; FIG. 18 is a structural electrical circuit of a second modification of a device for reproducing the television signal of a color izOckO1P1; in Fig. 19 - time diagrams), explaining the work of the second

 television signal color image.

A device for recording a television image of a color image (Fig.) Contains a low-pass filter (PFM), a delay line 2, an amplitude limiter 3, a frequency modulator 4, a high-pass filter 5 (HPF), a tailspin 6, a first band filter 7, the mixer 8, the second band-pass filter 9, the generator 10, the selector II of the pulses, consisting of the selector of 12 horizontal sync pulses and the selector of 13 personnel pulses, the former 14 pmpsishov, consisting of the first 15 and second 16 mult:; vibrators, first 17 and second - go 18 d of inference units and the first 19 and second 20 amplitudes of the detectors, control unit 21, consisting of the first 22 and second 23 triggers, the first 24, the second 25 and the third 26 NES, a key 27, a recording amplifier 28, a unit 29 of rotating magnetic heads, consisting of. supports 30, rotating shaft 31, BNC 32 and 33..

DL51 recording device - TV signal: ala color for a picture

(Fig, 5) contains a filter 34 frequency frequencies, a delay LIN1PO 35, amplitudes -.-L, iii limiter 36, a frequency modulator 37, a high-pass filter 38, cyi-ii aTop 39, a rear band-pass filter

40, a-de-jitter 41, second band-pass filter 42, generator 43, - selector 44 with 1 rocch pulses, multivibrator 45, differentiating unit 46, amplitude detector 47, trigger 48

a key 49, a write bushing 50, a block of 51 rotating magnetic heads, consisting of a support 52, a rotating shaft 53, sensors 54 and 55,

A lyiH device for reproducing a tv color signal. (Fig, 13J contains sensors 56 and 57, pre-amplifier 58, adjustable amplifier 59, filter 60

low frequencies, frequency demodulator 61, selector 62 lowercase synchronous soybean, nerve line 63 delay, first mixer 64, first generator 65, first band-pass filter 66, first key 67, detector 68, trigger 69 AND-NOT element 70, second key 71 , block 72 of automatic adjustable gain, phase detector 73, second generator 74, third key 75, second mixer 76, second band pass 77, BTopjao linsho 78 delay, adder 79.

A device for reproducing a television image signal of a color image (Fig. 15) contains sensors 80 and 81, a preamplifier 82, a frequency demodulator 83, a first delay line 84, a first mixer 85, a first band 86, a second, mixer 87, the second band-pass filter 88, the first key .89, the generator 90, the second delay line 91, the selector 92 horizontal sync pulses, trigger 93, the second key 94, the detector 95, the third 96 delay.

A device for recording monochromatic video signals (FIG. 16) comprises a modulator 97, a limiter 98, a key. 99, recording amplifier 100, horizontal sync pulse selector 101, multivibrator 102, differential (block 103, detector 104, trigger 105. block 106 of rotating magnetic heads, including rotating shaft 107, support 108, and sensors 109 and 110.

A device for recording a color image television signal (Fig. 17) comprises a modulator 111, a limiter 112, a key 113, a sync selector 114 consisting of a horizontal sync pulse selector 115 and a frame sync and 1 pulse selector 116, a pulse shaper 117 This includes the first 118 and second 119 multivibrators, the first 120 and second 121 multi-amplifiers. II of the first 122 and second 123 detectors, the control unit 124, consisting of the first 125 and second 126 flip-flops, and the first 127, the second 128 and the third 129 I-PE recording amplifier 130, the block 131 of rotating magnetic heads, including the rotating shaft 132, support 133 and sensors 134 and 135.

A device for reproducing a color television signal

42004 .Л

Keny (Fig. 18) contains a block, 136 rotating magnetic heads, including sensors 37 and 138, and the same first delay delay 139, key 5 140, limiter 141, demodulator 142, selector switch 143 horizontal sync pulses, multivibrator 144, first differentiating unit 145, first detector 146, trigger

10 147, an envelope detector 148, a second di (bdJectional block 149, a second detector 150, a second delay line 151.

The device (Fig. 1) works in the following way.

A full video signal is fed to the input of the device, from which low-pass filter 1 separates the luminance signal. The output of low-pass filter 1 is connected via line 2 of delay

20 amplitude limiter 3 whose output is fed to a frequency modulator 4 and is used to modulate the carrier frequency. Frequency Modulator Output Signal

25 4 enters an HPF 5 to remove low frequency components, the output of which goes to adder 6.

The full video signal does this.

30, on the other hand, a bandpass filter 7, which passes the color components from the full video signal, which is then fed to the mixer 8, made, for example, in the form of a balanced modulator, to which oscillations are also transmitted from the generator 10 to reduce the carrier frequency. Chroma signals on the order of 3.58 MHz to a frequency of, for example, 560 kHz. The output signal of the mixer 8 is supplied to. a second band-pass filter 9 for removing the high-frequency components, the output signal of which is fed to the key 27, which transmits the alternating signal. The chrominance signal strings, K9, are selected from the frame sync pulses.

40

45

The full video signal also goes to the selector 13, the output signal

which the multivibrator 16 passes through, the differential unit 18 dp of receiving pulses of positive and negative polarity. Differential unit 18 is connected to the amplitude

By detector 20, which transmits pulses of one polarity, trigger 23 generates square-shaped Mii pulses with a repetition frequency equal to the repetition frequency of horizontal sync pulses.

The output of the triggers 22 and 23 are united by the li-llE elements for the semi-control control signal for the key 27. The operation of the device is illustrated by the time diagram of the {-an (fig. 4) j and de nerves; Exit 8.1 nepBOi o Trigger 22 is shown in fl; d. 4a, second exit St. the first trigger 22 - in Fig. (5, the first

, the output S-J of the second trigger 23 is in FIG. 4S, and the second output s /, the second trigger 23 is in FIG. With the addition of 1 chr cgl 1sal S. n Sj in the I – PE J element, a signal is obtained (fz; t.4d), with the following: the signals Sj. n Sij in alem} 1t 25 - signal S (fng.4e.), code 2th signal S7 of element I-IIfi 26 is shown in fig.4zh.

The luiKj-i 27 transmits the chroma signal when cin iiaji S7 O, and does not transmit the signal, the chromaticity, and the signal Sf 1. The output signal of the key 27 is received by the adder in, amplified with gel and gel 28 zigi-yu and is fed to block 29, the rotating shaft 31 of which is driven by the motor (not shown), sensors 32 and 33 are located at a certain speed of the support 30, and connected to a very high speed HPS 28. Pa figs. Figure 2 shows the full solids signal that is not available to the device input in the O - 4 MHz frequency band and consists of the luminance component YAfi and the chroma component C. .After separating the chrominance component from the luminance component and converting the signal into a low frequency signal, the latter is fed to the adder 6, which is reflected in fich. 3, where C is the composition. Color, Urm — component of the luminance in the 1–4 MHz frequency band.

The device (Fig. 5) differs from that described by the execution of the control signal circuit | 1,.

The full 1-sighed signal enters the selector 44, the output signal 8c (fig. Bo) of which enters the circuit consisting of after-connected multivibrator 45, differentiating unit 46, detector 47 and trigger 48, on the output of which is controlled by the control G (ciHrHaji for a patch of 49. Pa of the output of the multivibrator 45 sigpal Sj, is shown

 on fig.b {). The signal Sj is differentiated into a differential by a block 46 (Fig. BE), at the output of which a signal P is obtained, which is passed through detector 47 (fng.bg). The output signal F of the detector 47 is used to trigger trigger 48. At the output of trigger 48, a square-shaped signal S. is generated (FIG. 6), which is the control signal of the custom key 49. In a tact, the key 49 skips the chromaticity components half the size of the peg Rhoda.

In Fig. 7, the ratio obtained by achieving the w-alignment of signals on magnetic tape 152 with some time is obtained; A fragment of each track .- 153 is shown in FIG. 7, together with the waveform of horizontal sync pulses. The movement delay of the magnetic tape 152 is indicated by the arrow O. P may also be right. In the same way, sensors 54 and 55 can scan tracks 153 vto: pz and ravnle N1. I 6 create an angle and relate to the direction of the magnetic lunch 152 I

The relative non-spacing of the magnetic tape - 152 31 sensors 55 and 54 - is usually such that one track 153 contains a record of all the lines in one television field. In the NTS.C system, the kg field has 262.5 lines, each frame consists of two fields, therefore, a total of 525 lines. At a constant 3ainicn speed, each line is recorded at the equal length of each track 153. If the first track of the right is the first field of a single television frame, the line recorded between the f and b marks is the floor At the end of the 262.5 line, the second track begins. The linear space along the magnetic tape 152 between the original points. The two tracks are denoted by P and shows in; -; go to record. The second track begins with a half line. Point ij should be half a line from the edge of the magnetic tape 152. Thus, in a triangle formed by P, n, bottom edge, magnetic tape 152 on the second track, h is the i 53, 1 track; necessary for recording one ..h P

NOV strings, and --- P cos AND.

For other ratios between tracks 153 and 152 magnetic tape.

(X - P.COS0,

where X is any positive number; P S - 60.

152

S is the magnetic tape speed in mm / s

2 v

h

 -

where V is the speed of the sensors 54-55 in

№1 / s.

If the azimuth angle in the sensors 54 and 55 is not equal to 90 °, then the ratios in this case are the knock-ups in Fig. 8 and the equations ordered above are valid, where magnetic leopard 154, lane 155,

In the case where X 3 (FIG. 9), on tape 156, track 157 is divided into lines, where odd lines are marked with hatching, on which chroma signals are recorded. From FIG. 9, it is seen j that the track 158 is offset from the track 157 by 2.5, which means 3. As a result, the 266-a row is located along the first row. Since the chroma signal is recorded during the first line and all odd lines are in the first track 157, no signal color should be recorded in the 266th line} Single or any even lines in the second track 158. As a result, such information is recorded only during the odd lines in tracks 157 and 158, which together make up the first television frame on the magnetic tape 156. At the same time, it becomes necessary to record color signals only during the even lines in tracks 159 and 160, which together record the first and tue cerned field in the second frame of the TV. Thus, in one cycle, two full frames of television are under four floors x. In this example, the chrominance signals are recorded on four, tracks 157-160 in the following order: odd, odd, odd, even.

In FIG. 9, the direction of movement of the magnetic tape 156 is indicated by the arrow C and the direction of movement of the sensors 54 and 55 is indicated by the arrow d, i.e. angle 6 90 °,

ny

on zoz on aa but also eat 8, u6. about vows - e-

Figure 10 shows the case where the sensors 54 and 55 move in the opposite direction, i.e. angle 0 90 In this case, the chrominance signal is recorded in the odd rows of the track 161. To obtain the chess order, the recording must be made in the fourth X lines on the track 522, in the even lines on the road 163 and in the odd lines of track 164 on magnetic tape 165, i.e. in the following order: odd, even, even, odd, which is. valid for any ratio of 15 piv records, where X is equal to any odd integer.

ila figs 11 and 12 show angles 9, b between the direction of movement of the sensors 54 and 55 and the width tj, Er

20 of the air gap between them, fig 1 1 shows the case when 8i 90, and fig.12 when 6 g EO.

Playback device

25 of the color television signal (image 13) works as follows.

Sensors 56 and 57 are connected in parallel to the preamplifier 58

30 n remove from the tape a signal containing components of luminance and

. chromaticity (Fig, 14a,). After amplifying the luminance signal by preamplifier 58, demodulating it with a modulator 61 of the modulator 61, the selector 62 separates the short-circuits of S. (Fig. 14) -. These signals are delayed by a delay line 63 (the signal in Fig. 1A) and are received as a control signal.

40 signals per key 67. The chroma signals pass through an adjustable amplifier 59 and a low-pass filter 60 to mixer 64, which shifts the carrier frequency to a frequency of 4.14 MHz. 45 Juich 67 transmits only signals S, (fng, 14g) to detector 68. Signals .S (i (in the code of detector 68 (fig.14d) are served as a pulse sequence on trigger 69. Trigger 69

50 generates an output signal (FIG. 14 e),

The delayed horizontal sync pulses, the n signals are fed to the IS-NE 70, the output signal of the 55th which (Fng.14g) is supplied as a control signal to the key 71, which controls the unit 72 to supply the control signal to the adjustable amplifier 59 for ensuring the installation and the necessary amplitude of the chroma sigial.

The output signal of the key 71 is also iodized through a phase detector 73 to a 7D generator to obtain a phase-controlled oscillation with a frequency of 4.4 mHz, which is necessary for supplying it to the mixer 76. The signal S-j / s of the generator 7A is shown in FIG. Band-pass filter 77 passes signals with .i-5,1 (fng.14i) through LIN1-ON 58 delay, at the output of which the chrominance signals C and S are shown in fig.14k. Delayed and non-held signals are summed up in

adder 79 {fig.14l). 79 cm ltpattc signals With

sum-1atore; -

S

one;

S., p. demodulated signal

eight

WITH .

from the demodulator 61 to recover the video signal.

Fig. 15 is a simplified modification of the reproduction of a television signal of a color image signal.

In this device, the sensors 80 are connected to the preamplifier 82, the output of which is connected to the input of the frequency demodulator 83. The output signal of the clock of the demodulator 83 comes through the delay 84 line U, mixer 85, and the selector 92 line sync pulses through liercda 96 delay and trigger 93 put on the key 94.

The output of the pre-bolt amplifier 82 is connected via a band pass

86 with a mixer 87, on which the sub-) ots also count: eb11i from the generator 90. Then the output signal of the mixer

87 jiepe3 bandpass filter 88 enters the dongle 89 and through the delay line 91, i.e. a second signal is generated to add to mixer 85.

In this device, when the sensors 80 and 81 close the tracks on which no chrominance signals are recorded, remove the interference that is not filtered out by the filters 86 and 88. To eliminate this interference, only the convergence signals 85 pass through the switch 89. - By switching the key 89, it is ensured that the rows 85 that do not have a chrominance signal are transmitted to the mixer 85, but rather a hitch is transmitted.

one

-

242004 About

However, there are situations when it is necessary to strobe the entire video signal.

In the recording device (Fig.16) on

A modulator 97 input is supplied with a hollow video signal, the output signal of which through limiter 98 is supplied, key 99. The output signal of key 99 is fed through amplifier 100 to sensors 109 and 110 of rotating array unit 106}. The rotating shaft 107 is driven by a motor (not shown), rotates the support 108, on the opposite ends of which sensors 109 and 110 are mounted.

The input signal also comes through the selector 101, the multivibrator 102, the differentiating unit 103, the detector 104 and the trigger 105, which

20 generates, for kyocha 99, a control signal which is received during alternating rows. For this, trigger 105 generates an output for one row and closes the 25 st key 99 for the next row. Switch key 99 to: It will take place immediately before the lowercase sync pulse present in each line. This should be used

30 non-odd front of a horizontal sync pulse and a front line for triggering 105 with a delay of one period, which is performed by the multivibrator 102.

A more complex switch is shown in the recording device (FIG. 17, in which the selector 114 consists of a selector 115 of sync pulses and a selector 116. frame synchronous stimuli. The output signals of the flip-flops 125 and G26 go to the P-IE elements 127 - 129, which generate control signal for key 1 13.

 3, the playback device (Fig. 8, the sensors 137 and 138 must have the same azimuthal angles with the sensors 109 and 110 (Fig, 16) or with the sensor: a 1 and 134 and 135 (Fig. 17).

The signal Sa-i (Fig. 19a) of the sensors 137 and 138 is a full video de-sigal, which is fed through a delay line 139 (signal S22 of Fig. 1 96) and directly to the key 40. The output signal Sg of the key 140 (Fig. 19c) limited to limiter 141, demodulated by demodulator 142, and output to device 35

50

55

The signals (signal. Fig. 19g) and the selector 143 days for extracting horizontal sync pulses (signal Sgs, Fig. 19) The highlighted line 1: 1e sync pulses are fed to the multivibrator 144 (signal 8GB9 fng.19e), differentiated by a differentiating unit 145, and passed through a detector 146 (signal Sj., fig. 19g) and contains sargpomans synchronized with the falling edge of each pulse generated by the multivibrator 144. This series of pulses is connected to trigger 147, which forms square pulses (signal Sjj, fig. 19z ), KOTOpbBi is the control signal for the key 140 d l forming the signal Zgz (Fig.196).

A circuit consisting of an envelope detector 148 (Sgg signal, Fig. 19i), a differential of the analog unit 149, a detector 150 (SJQ signal, Fig. 19 k.), And a signal c are used to form rectangular pulses using a polarity trigger 147 corresponding to polarity. the output of which is delayed by the delay line 151 (signal S, -Fig. 1 9l), which is fed to the trigger 147.

If trigger 147 is operating in the appropriate mode, then, on the other hand, Sji signals will not change its state. If the trigger 147 generates signals of another polarity, then the appearance of the next signal S will change the state of the trigger 147.

Formula 3 and about 10 and 11,

Claims (4)

1. A device for recording a television signal of a color image comprising a serially connected 40 iHjie frequency filter, a delay line, an amplitude limiter, frequency modulator, high frequency generator and combiner, as well as successively the first and first bandpass filter 45, a mixer and a second bandpass filter, a generator whose input is connected to the second input of the mixer,. the input of the first band-pass filter and the input of the low-pass filter 50 are combined and are the input of the video signal, and the cytLMaTopa output is connected to the rotating magnetic heads through the recording amplifier, so that 0 15 0 5 0 five 0 five 0 recording density, a sync pulse selector connected in series, a pulse shaper, a control unit and: a key, the second input of which is connected to the output of a second bandpass filter, and a key output connected to the second input of the cyi-matrix, and the selector input of the sync pulse combined with a lowpass filter input. 2. The device according to claim 1, wherein the selector of the sync pulses contains a selector, frame sync pulses and the selector of horizontal sync pulses, the inputs of which are combined and are the input of the sync pulse selector, and the output of each of which is the corresponding output of the sync pulse -. owls 3. The device according to claim 1, that is, so that the pulse shaper contains a first multivibrator connected in series, a first differentiating unit and a first a send detector and a sequential connected second multivibrator, the second differential unit and the second amplitude detector, with the inputs of the first and second multivibrators being the corresponding inputs of a pulse shaper, and the outputs of the first and second amplitude detectors at - are corresponding to the corresponding outputs of the pulse shaper. 4. The device according to claim 1, which is valid so that the control unit contains two flip-flops, three I-IE elements, while the first and second outputs of the first flip-flop are connected to the first inputs of the first and the second element AND-NOT, the one and the second outputs of the second trigger are connected to the second inputs of the first and second elements AND-IS, respectively, the output of the first element AND-NOT and the output of the second element AND-NOT connected respectively to the first and second inputs of the third element, AND -NO, and the inputs of the first and second The I triggers and the output of the third AND-HEN element are respectively the inputs and output of the control unit. / W 0 1 z fib, 2 ), z r-t fig 3 X fPH r 5gD 522 52 / / 2 J / .5S Ш 2. mZE5 521 523 525г5Э 2f / 2 / rj IPUS./f niji J5 37 J5 Jj | FIG. five I r I I I L, IT -ih | firi 4hrs uz .l .fib 0 15B J58 157 ff jr SH (pi / s.5  W3 W2 161 X X X fiz.go 01 pool OJt / e.n55 .2 f. but. - 5-Jt 5p Tt -fj % - c-1.G LH ".H V g S -s B „(. J ,, Fig 14 Vut.fS  U8 Y6 (Js-w t 117 Sh gr -f-T -1 P t - 127 h 1/25 t FIG. 17 t FIG. 1B C - I 2tf 2 S22 3 and ts of FIG. nineteen