SU1088155A1 - Stereoscopic colour television system - Google Patents

Abstract

STEREO COLOR TELEVISION SYSTEM contained on the transmitter. On the side, a light-catching block of a four-signal stereopair sensor connected by outputs to the inputs of a block of amplifier amplifiers, the first and second outputs of which are connected respectively to the first and second inputs of the coding matrix, a switch, a subcarrier generator connected by the first output to the first input of the first frequency modulator, the output of which connected to the first input of the first adder, and the transmitter, and on the receiving side the receiving unit, the delay line, the input and output of which are connected respectively to n The first and second inputs of the switch, the first amplitude detector, the first video amplifier, the decoding matrix and the kinescope, as well as the first band-pass filter, the first and second frequency detectors, the outputs of which are connected to the second and third inputs of the decoding matrix, and the beam-splitting unit, respectively, are connected in series It is obvious that, in order to increase the depth resolution while maintaining compatibility with the standard television system SECAM, the first line is introduced on the transmission side delays and a second adder connected in series, a first low pass filter and a first inverter connected in series, a second delay line, a third adder and a fourth adder connected in series, a second low pass filter and a second inverter connected in series, and a second frequency modulator , wherein the inputs of the first delay line and the first low-pass filter are connected to the third output of the amplifier unit-shaper, the inputs of the second delay line and the second low-pass filter are connected The first and second outputs (L of the coding matrix are connected to the second inputs of the first and second frequency modulators, respectively, the first input of the second frequency modulator is connected to the second output of the subcarrier generator, and the third output of the coding matrix is connected with the second inputs of the second and third adders, the outputs of the first and second inverters of the inverters are connected to the third inputs of the second and third adders, respectively, the output of the second adder is connected to The first input of the first adder, the output of the second low-pass filter cf is connected to the third input of the coding matrix, the output of the second frequency modulator is connected to the second input of the fourth adder, the outputs of the first and fourth adders are connected to the first and second inputs of the switch, respectively, the output of which is connected to the input a second amplitude detector and a second video amplifier, connected in series, as well as a second band-pass filter, and a high-frequency output and is connected to the input

Description

the delay lines, the first and second outputs of the switch are connected to the inputs of the first and second amplitude detectors, respectively, the outputs of which are connected to the inputs of the first and second band-pass filters, respectively, the outputs of which are connected to the inputs of the first and second frequency detectors, respectively, and the output of the second video amplifier are connected to the fourth input of the decoding matrices.

The invention relates to television, in particular to stereo color broadcast television systems. A stereo-color television system (SCTS) is known, containing on the transmitting side a sensor of a wide band flatness signal of the left frame of a stereo pair and a sensor of narrowband chrominance signals of the right frame of a stereo pair (SP), the outputs of which are connected to the inputs of the encoding matrix, the output of the narrow band signal of the right frame SP, which is directly connected to the input of the first balanced modulator directly, and the outputs of the narrow-band chrominance signals of the right frame of the joint venture are connected to the input of the second balanced modulator via a switch. The second inputs of the balanced modulators are connected to the outputs of the subcarrier frequency generator, and the outputs to the inputs of the mixer, the output of which is connected to the input of the transmitter, and the third input to the output of the sensor of the wideband luminous signal of the left frame of the SP. On the receiving side, the DSTN contains a receiving unit, a band-pass filter, three synchronous detectors, a delay line, a switch, a sub-frequency generator, a decoding matrix and a light-splitting unit 1. The disadvantages of this STSTS are incompatibility with the standard SECAM system, as well as low depth resolution . The closest to the technical essence of the proposed is the STSTS, which contains on the transmitting side the light-decaying block of the four-signal sensor SP, the ycHt block, drivers-formers, encoder matrix, switch, subcarrier generator, frequency modulator, adder and transmitter, and on the receiving side block, amplitude detector, bandpass filter, video amplifier, delay line, switch the first and second frequency detectors decoding matrix, kinescope and beam-splitting unit C2. The disadvantage of this SCV is the low depth resolution. The aim of the invention is to increase the depth resolution while maintaining compatibility with the standard television system SECAM. This goal is achieved by the fact that the first and second outputs of the four-signal sensor's light-receiving unit are connected to the inputs of the amplifier amplifier unit at the transmitting end which are connected respectively to the first and second inputs of the coding matrix, a switch, a subcarrier frequency generator connected by a first output to the first input ne frequency modulator, the output of which is connected to the first input of the first adder, and the transmitter, and at the receiving side - the receiving unit, the delay line, the input and output of which are connected respectively to the first and second switches of the switch, connected in series to the first amplitude detector, first video amplifier, decoding matrix and kinescope, as well as the first band-pass filter, the first and second frequency detectors, the outputs of which are connected respectively to the second and third inputs of the decoding matrix, and the beam-splitting unit, On the transmitting side, the first delay line and the second adder connected in series, the first low-pass filter and the first inverter connected in series, the second delay line, the third adder and the fourth adder connected in series, the second low-pass filter and the second inverter connected in series , as well as the second frequency modulator, with the inputs of the first delay line and the first low-pass filter connected to the third output of the amplifier unit, the inputs of the second l EIs of the delay and the second low-pass filter are connected to the fourth output of the amplifier unit-shapers, the first and second outputs of the coding matrix are connected to the second inputs of the first and second frequency modulators, respectively, the first input of the second frequency modulator is connected to the second output of the subcarrier generator frequency, the third output of the coding matrix is connected to the second inputs of the second and third adders, the outputs of the first and second; Inverters are connected to the third inputs of the second and third adders, respectively but, the output of the second adder is connected to the second input of the first adder, the output of the second low-pass filter. connected to the third input of the coding matrix is the output of the second frequency modulator connected to the second input of the fourth adder, the outputs of the first and fourth adders are connected respectively to the first and second inputs of the switch, the output of which is connected to the i input of the transmitter, and the second amplitude detector and the second video amplifier, as well as the second band-pass filter, and The output of the high-frequency unit is connected to the input of the delay line, the first and second outputs of the switch are connected to the inputs of the first and second amplitude detectors, respectively, the outputs of which are connected to the inputs of the first and second bands of filters, respectively, the outputs of which are connected to the inputs of the first and second frequency detectors, respectively, and the output of the second video amplifier is connected to the fourth input of the decoding matrix.

FIG. 1 shows the structure-. on the electrical circuit of the transmitting part of the proposed STSTS; on. Fig. 2 is a structural electrical circuit of the receiving part of the STSTS.

STSTS contains on the transmission side (Fig. 1). light-trip unit 1 of the four-signal sensor SP, block 2 of the shaping amplifiers encoding matrix 3, first delay line 4, second delay line 5, first low pass filter 6, second low pass filter 7, first adder 8, second adder 9,, first inverter 10 , the third adder 11, the fourth adder 12, the second inverter 13, the subcarrier frequency generator 14, the first frequency modulator 15 the second frequency modulator 16, x the mutator 17 and the transmitter 18, and the receiving unit 19 on the receiving side (figure 2), delay line, 20, switch 21, first amp intelligent detector 22, second amplitude detector 23, first band-pass filter 24, first frequency detector 25, first video amplifier 26, second band-pass filter

27, the second frequency detector 28,. the second video amplifier 29, the decoding matrix 30, the kinescope 31 and the beam-splitting unit 32.

STSTS works as follows.

On the transmitting side (Fig. 1), by the light-grip unit 1 of the four signal sensors of the joint venture, two wide-band luminous signals of the stereo pair, E, and also two narrow-band chromaticity signals Es and E „„; then all four signals

for opl a

arrive at block 2 of the shaping amplifiers, where they are amplified and subjected to gamma correction. From the output of block 2 of the amplifiers-formers, the signals E and having about 1.3 MHz in a possible way, go to the nep-j left and second inputs of the coding matrix 3, the signal Edal, having 0-6 MHz bands, goes to the inputs of the second delay line 5 to 0.7 μsi of a second low pass filter (LPF) 7, where its bandwidth is limited to a value of O — 1.3 MHz. After the low-pass filter 7, the signal is fed to the input of the second inverter 13 and to the third input of the coding matrix 3, in which the color difference signals the luminance signal EYJ- and the signal in

according to expressions; EGA Ewft - Jord; .

(one)

Chg, (2) (3)

   "L 41

F - p - m

(4) В-Y ВП Y

where d, (b, f in. expression (2) are relative pkosnye coefficients.

The formation of signals (1) - (4) occurs in the band O - 1.3 MHz. From the first and second outputs of the matrix coding switch 3, the color difference signals (3) and (4) arrive at the second inputs of the first and second frequency modulators (FM) 15 and 16, the first inputs of which receive the voltage of the subcarrier from the generator 14 of the subcarrier. In FM 15 and 16, all the transformations necessary to form the color difference signals D and OC of the SECAM system are carried out.

The narrowband signal (0-1, ZMHz) from the output of the second inverter 13 in negative polarity is fed to the third input of the third adder 11, the first input of which receives a wideband signal (O - 6 MHz) of positive polarity. A second delay line 5 is needed to match the phase relationships between the signals in the narrowband and wideband channels.

The second input of the third adder 11 receives a synthesized code {) by a matrix of 3 loudness signal, with the result that at its output a signal of the form Y / V2 is formed (O ... Y, ZA1 Hz; Nt {, 3-6, IHI) Similarly, from the third output of the block 2 signal amplifiers EK / A (e.fc / Vir4l goes through the first delay line 4 to the first input of the second summator 9, through the series-connected first low pass filter b and the first inverter 10 to its third input. To the second input of the second sumator 9, the third output of the coding matrix 3 receives the signal Eug: (0-13L 1g,) f, as a result of which, at its output, a signal of the form F -FF -F m (o- (,,) (o-, zMHz) gko-g3 / igtsG (o-g, g / ghH pN, S-Migch) Thus, after the second and third adders 9 and 11, in the transmitting part of the proposed OSTS, signals are formed with high-frequency components belonging only to the left or only to the right signals (frames) SP: E and EVj. expression (b), is fed to the second input of the first adder 8, where a frequency-modulated color-carrying signal D of the subcarrier coming from the output of the first FM. 15. Similarly, the inputs of the fourth adder 12 receive a signal, described by the expression 5), and the subcarrier voltage modulated by the CHF signal Dg in the second FM 16. From the outputs of the first and fourth adders 8 and 12, the full stereo color television signals are sent to the first and the second inputs of the switch 17, which performs their line-by-line switching, and from its output - to the input of the transmitter 18. The signals (5) and (b) have a common low-frequency part, formed by replacing the low-frequency part of the allocated luminous signals E, and Ец, п synthesis This signal (2), which is the algebraic sum of the color-separated image signals of the left and right AS frames, is necessary for accurate decoding of the color signals in the receiver and playback of the stereoscopic image on the standard color television receiver. Thus, in the proposed system, the full transmission signal has the form. where E, y is defined by expression (5) in line n and expression, (6) in line n + 1, and component Ey, by expression (2), Signals V - color difference signals on the subcarrier are determined by expressions (3) and (4) / the synchronization signals fully correspond to the corresponding signals of the standard SECAM system. The full signal (7) is similar to the full signal of the standard SECAM system, which ensures full professional compatibility of the proposed system and the SECAM system. When reproducing the signal generated by the STFS signal on a standard color television receiver, the same destructive depth capability is provided as in the prototype. However, as a result of transmitting the luminance signals of the left and right frames of the SP in the 1.3-6.0 MHz frequency band in a special receiver, it is possible to separate these signals and, therefore, to obtain high (about one decomposition element) resolution in depth. Consider the work of a special receiver (Fig. 2) when receiving a signal described by the expression (7). The high frequency signal received by the antenna is processed at the receiver. block 19, at the output of which an intermediate frequency signal is generated, which is fed to the first and second inputs of the switch 21 directly and through the delay line 20, delaying by one line (64 µs). The 21 direct and delayed signals generated at the first and second switch outputs are fed to the inputs of the first and second amplitude detectors 22 and 23, at the outputs of which, respectively, UChko ... -G. ((, 3 ... ". OMC) whose spectrum has a subcarrier modulated by the DR signal, and USR + P / Q1 Y L1 (0 ... 1, ZMHz) Wn (, J ... 6, OMr4) the spectrum of which has a subcarrier modulated by the Dg signal. described by expressions (8) and (9) are fed to the inputs of the first and second video amplifiers 6 and 29, as well as to the inputs of the first and second band filters 24 and 27, which separate frequency-modulated single-carrier, which is then demodulated by the first and second frequency spectrometers 25 and 28. The signals from the outputs of the first and second video amplifiers 26 and 29 and the first and second h 100th detectors 25 and 28 arrive at the inputs of the decoding matrix thirty, .

on the first and second outputs of which signals and stereo pairs are created:

CL - RA-EVz) (ft.; I.3Mrm +) - 5

P (1., OGP) (a ..,) l (1.3 ... 6.0 “Hz,), I,. (ten}

and Ebd (- EVi:) (tt., 3Mrnj + Yes.I. 31.31igts |

EU {, .. tiO / lir K EEA (V.L., ZMHz | + E, (ch. (1.3 .. €, WGP1,) Similarly, the signals of the right channel are formed in the next line. The third output of the decoding matrix is 30 FO1114 signal

  EV "- EYE) (u..i, Eug (a..z" Hz)

(... 4l 1HzGE "(, 3 / IHH) (1.3 ... 6.0 / IHCHG,"

From the outputs of the decoding matrix, 30, the signals described by expressions (10) - (12) are transmitted to the corresponding electrodes of the kinescope 31, reproduced by it, and then the beam splitter-25 block 32 is distributed to the images of the left and right frames of the stereo pair.

Thus, the proposed OSTS allows forming in a special television receiver broadband color-separated image signals that provide high OSTS resolution in depth. Reproducing these signals with a standard color kinescope allows an observer with colors and glasses (for example, blue and orange filters) to distinguish the parallax values between the same points of the reproducible stereo pair of the same decomposition element, which provides a sixfold increase in resolution with respect to the prototype the depth.

The proposed SCTS allows the use of a polarized reproduction method (121 20 of reproducing and separating a reproduced stereo pair in the presence of a known reproducing device with two color kinescopes and combining images of the reproduced stereo pair on a semitransparent mirror. At the 3rd, each of the kinescopes must be connected to the output of the left amplifiers or right channels.

ten

FIG. g

Claims (1)

A STEREO-COLOR TELEVISION SYSTEM, comprising on the transmitting side a light-releasing unit of a four-signal stereo pair sensor, connected by outputs to the inputs of a driver amplifier unit, the first and second outputs of which are connected respectively to the first and second inputs of the coding matrix, a switch, a subcarrier frequency generator connected to the first output with the first input the first frequency modulator, the output of which is connected to the first input of the first adder, and the transmitter, and on the receiving side of the receiving unit, the back line _rzhki,; the input and output of which are connected respectively to the first and second inputs of the switch, the first amplitude detector, the first video amplifier, the decoding matrix and the kinescope, as well as the first band-pass filter, the first and second frequency detectors, the outputs of which are connected to the second and third inputs of the decoding matrix, respectively , and a beam splitting unit, characterized in that, in order to increase the resolution in depth while maintaining compatibility with the standard SECAM television system, · On the transmitting side, the first delay line and the second adder connected in series, the first low-pass filter and the first inverter connected in series, the second delay line, the third adder and the fourth adder connected in series, the second low-pass filter and the second inverter connected in series, as well as a second frequency modulator, the inputs of the first delay line and the first low-pass filter connected to the third output of the amplifier-former unit, the inputs of the second delay line and the second a low-pass filter is connected to the fourth output of the amplifier unit - <d formers, the first and second outputs of the coding matrix are connected to the second inputs of the first and second frequency modulators, respectively, the first input of the second frequency modulator is connected to the second output of the subcarrier frequency generator, the third output of the coding matrix is connected _with the second inputs of the second and third adders, the outputs of the first and second inverters are connected to the third inputs SU ..,. 1088155 for the second and third adders, respectively, the output of the second adder is connected to the second input of the first adder, the output of the second low-pass filter is connected to the third input of the coding matrix, the output of the second frequency modulator is connected to the second input of the fourth adder, the outputs of the first and fourth adders are connected respectively to the first and second inputs of the switch, the output of which is connected to the input of the transmitter, and on the receiving side a second amplitude detector and a second video amplifier connected consequently, as well as a second bandpass filter, the output of the high-frequency block being connected to the input of the * delay line, the first and second outputs of the switch are connected to the inputs of the first and second amplitude detectors, respectively, the outputs of which are connected to the inputs of the first and second bandpass filters, respectively, the output which are connected to the inputs of the first and second frequency detectors, respectively, and the output of the second video amplifier is connected to the fourth input of the decoding matrix.