SU1424141A1 - Method of transmitting stereoscopic color television images - Google Patents

Abstract

The invention relates to television. The purpose of the invention is to achieve compatibility with standard color television systems while improving the stereo effect. The essence of this method is that from the separated signals from two stereo-color TV cameras 1, two luminance signals are generated by the matrices 2 in the full frequency band, from the spectrum of which the low-frequency part is cut out by the band-pass filters 3. These signals in summers 4 are summed with the signals of frequency modulators 14 and 16 and the results modulate in amplitude in amplitude modulators 5 the image carrier frequency from r-20. With the help of band-pass filters 6, only the upper and lower frequencies remain in the output signals of the two modulators 5 only lower sidebands. Then both of these signals, as well as the two-way signal from the output of the amplitude modulator 18, are summed up in the adder 21, after receiving a single or two audible signals, the full video signal of the stereo color television, which then goes to the transmitter 22. 2 Il. I fPF i (L s

Description

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The invention relates to the section of stereo color television and can be used in television (TV) broadcasting for the transmission of volumetric color images.

The purpose of the invention is to achieve compatibility with standard color television systems while improving the stereo effect,

Fig. 1 shows the spectrum of a stereo color TV signal generated by the proposed method in the case of SECAM systems; in r, 2 is the structural electrical circuit of the device with which the method is implemented.

In the drawings, all signal designations and block numbers referring to the left frame are marked with one stroke and referring to the right frame with two strokes. Signals and blocks without strokes refer to both frames.

A device for carrying out the proposed method (FIG. 2) consists of two identical channels, each of which contains a stereo-colorbook TV camera 1, a matrix 2 forming a luminous signal, a band-pass filter 3, an adder A, an amplitude modulator of the image carrier frequency 5, a band-pass filter 6 , three adders 7, 8 and 9, matrix 10, three filters P, 12 and 13 low frequencies, first frequency modulator 1A, generator 15 subcarriers, second frequency modulator 16, first switch 17, amplitude modulator 18, second switch 19, generator 20 carrier hour Ota image combiner 21 and transmitters 22 snip,

The device works as follows.

Same color-delta signals U, EC, El; and E, E g. and E from a stere re-color TV camera 1 and G are pairwise fed to three adders 7.8 and 9, in which three mixed color-separated signals are formed

EB - 0.5 E; + 0.5 Ej,

Of these signals, a matrix of 10 forms a mixed luminance signal E and two mixed color and luminescence signals.

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E, y, and Ej-y, whose spectra are reduced to 1.5 MHz by 11, 12, and 13 filters, the swept low-frequency luminance signal Ey modulates, in amplitude modulator 18, the unsigned image frequency from generator 20, and the mixed low-frequency color difference signals p . and Ejj.y modulate in frequency in frequency modulators 14 and 16 subcarriers from the Oscillator 15 subconsolidate.

Separated signals Un, Eq and Eg from the left color camera 1 and E, EQ and Eg from the right color camera 1 are also independently transmitted to two matrices 2 and 2, forming two luminance signals in the full frequency band. The band-pass filters 3 and 3 of the spectra of these signals cut the low-frequency part from 0 to 1.5 MHz. In this form, these signals are sent to the first inputs of the adders A n 4. Their second inputs using two switches 17 and 19, controlled by a horizontal frequency f, are alternately output signals from frequency modulators 14 and 16. As a result, when in the luminance spectrum of one of the frames. the stereo pair is present on the subcarrier of signal E-, in the luminance signal spectrum of another frame the signal Eg is present on the subcarrier. and vice versa, string through line. The sum signals from the outputs of adders 4 and 4. modulate in amplitude in amplitude modulators 5 and 5, the image carrier from generator 20, With two band-pass filters b and b, in the output signal of amplitude modulator 5, only the upper sideband remains, and in the output signal of the amplitude modulator 5 - only the lower sideband, after which both of these signals, as well as the two-way signal from the output of the amplitude modulator 18, are summed up in the adder 21, forming, after complementing it with one or two sound signals, The video signal Ej of the stereo color television according to the proposed method, which is then fed to the converter and the power amplifier of the transmitter 22. The full spectrum of this signal is shown in detail in FIG.

An EP video signal is advisable at an intermediate frequency of 30-50 MHz and then 3K conversion.

frequency transfer it to the decimeter range.

Claims (1)

The formula of the invention A method for transmitting stereotsvetnyh TE levieionnyh image based on luminance signals forming the left and right frames, the formation of low-frequency color difference signals line by modulating the low frequency chroma signal subcarrier frequency and summing a luminance signal, the amplitude modulation of the carrier frequency luminance voltage izobra- the signal of the left frame in the upper frequency band, characterized in that, in order to achieve compatibility with standard color systems elevideni while improving stereo, low-frequency signals formed tsvetoraznost- nye pairwise smesche14 cue tsvetodelennnh signals of the left and right frames, in modulating the low frequency chroma signal subcarrier is modulated in frequency form a low frequency mixed signal luminance pairwise summation of color separation signals of the left and right frames and double-sideband modulate the received signal in amplitude picture carrier frequency, the formation of luminance signals of the left and pravodgo frames produce a frequency limit from below, summarize the bottom-limited rogo signal of the right frame from the hour modulated subcarrier frequency and modulated by the amplitude of the signal received non-dynamic frequency of the image in the lower band, summarize the lower, upper and two-band modulated components of the carrier frequency of the image.