SU1368997A1 - Transceiver of spectrozonal video signals - Google Patents

Abstract

This invention relates to a television flf 1. The purpose of the invention is to increase the capacity of the communication channel. . The device contains transmitting and receiving sides. On the transmitting side, in each spectrozonal video signal, video signals of the elements are transmitted, corresponding to the same spatial points of the object of observation. The video signals are then interleaved by groups of video signals of the rows, and sync pulses are mixed into this compressed video signal. At the receiving side, the received video signals are distributed in two channels, where the missing video line signals and electronic signals are restored, and the extrapolated and interpolated video signals are formed, from which the output video signals are formed. 2 Il. with (I

Description

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one

The invention relates to television technology and can be used in television application systems.

The purpose of the invention is to increase the capacity of the communication channel,

FIG. 1 shows a structural electrical circuit of the transmitting side of the device for transmitting and receiving spectrum of regional video signals; figure 2 is the same, the receiving side.

A device for transmitting and receiving a spectrum of horizontal video signals on the transmitting side includes a block 1 for generating spectral-band video signals, first and second elements 2 and 3 delays, first and second switches 4 and 5 video signals, a third delay element 6, a third switch 7 for video signals, block 8 for generating a complete television signal. a signal connected to communication channel 9 and a control and synchronization unit 10. The receiving side consists of the first switch 11 of video signals, the first and second blocks 12 and 13 of line recovery, the first delay element 14, the second and third switches 15 and 6 of video signals, the first, second, third and fourth blocks 17-20 of restoration of elements, the third and the fourth delay elements 21 and 22, averaging block 23, interpolation block 24, weighted sum block 25, extrapolation block 26, block 27

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generating output video signals and a sync block 28.

The device works as follows

Spectrozone video signals U. and 2 from the first and second outputs of block 1 are fed to the first and second first switch 4 of video signals, and at the output of its video signals U and U pass alternating groups of video signals of elements. The delay element 2, which delays by a time equal to the time the group i signals of the elements follow, is required here in order to transmit the video signals of the elements corresponding to the same spatial points of the object of observation to each spectro-zonal video signal. Video signals U and and are similarly processed. from the third and fourth outputs of block 1 by means of a video switch 5 and a delay element 3, the control of switches 5 and 4 is performed by a signal from the output of block 10

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15

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control and synchronization, under the action of which switches the inputs of the switches 4 and 5 to their outputs every i intervals of the image decomposition element Tj.

The first and second secondary video signals are fed to the inputs of the third video signal switch 7, which passes the input video signals to its output by alternating groups of 1 video signals of rows (compressed video signal). The delay of the second secondary video signal is equal to 1 periods of the line frequency and is implemented using the third delay element 6. Switch 7 is controlled by a signal from the fourth output of block 10.

The compressed video signal is fed to the first input of the B-block forming a complete television signal, where the sync pulses are replaced in it. At the receiving side, the video signal from the output of communication channel 9 is fed to the inputs of the first video switch 11 and the synchronization unit 28, in which signals are selected, the JQ controls the operation of the video switches, and the clock pulses from the selected synchronization signals. Under the action of the control signal from the first output of the unit 28, the switch 11 distributes the received video signals through two channels. In the first channel passes the first secondary video signal, and the second - the second. Each secondary video signal is a periodic sequence of groups of 1 video signals of strings separated by free time intervals equal to C.

From the outputs of the switch 11, the secondary video signals are received respectively on the first and second line 12 and 13 blocks of recovery, in which the missing line video signals are recovered. From the outputs of these units, the recovered secondary video signals are provided to the second and third switches 15 and 16 of the video signals. The first secondary video signal passes to the input of the switch 15 through the first delay element 14, which delays it by IT, required to compensate for the delay produced by element 6, on the transmitting side, the switches 15 and 16 are controlled by a signal from the second output of block 28

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1 | AK, that their outputs are alternately connected to the inputs with the frequency switch- {i-Tg. Thus, there is a separation of secondary video signals and incomplete spectrozonal video signals, representing sequences of groups of video signals of elements i, separated by free time intervals equal to iT. The missing video signals of the elements are restored in each incomplete pectal zone video signal in the corresponding blocks 17-20 of the restoration of the elements. After the restoration of the video signals of the elements, the spectral J signals are delayed by the corresponding elements 21 and 22

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on the transmission horon.

Video signals and "and U are fed to the corresponding inputs of the block 26 ext;; supports for the time I i to compensate

four

1POLATIONS In this block, the formation of extrapolated video occurs. 1

and

and, and

B

Extractive signals Uj,, g, grilled video signals are received

the respective inputs of the weighted sum block 25,

The spectrozonal video signals Lj also come to the inputs of the unit 23 of the instrument. The averaged video signal from the 1st pass of the block 23 is fed to the second one of the interpolation block 24, to the other soda of which the spectroscopes are supplied

and and

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The latest video signals w b yuke 24 produce the formation of the signals C, U, U., and,

Interpolated video signals will fall on the corresponding inputs of the block 25. Signals from the outputs of blocks 17,, 25 and from elements 21 and 22 are given

to i

1 corresponding inputs of block 27,. This forms the output video signals.

formula of invention

A device for transmitting and receiving spectral video signals, containing on 1 transmitting side a block of spectral-zone video signals,) And a video switch, a block for generating a complete television signal, the output of which is connected to the input to the main link, and a control unit and syn-X), the first output of which is connected to the control inputs of the shaping unit of the multispectral video signals

of the full television signal, the second output to the control inputs of the first and second video switches, and the third output to the control input of the third video switches, and on the receiving side the synchronization unit, the first output of which is connected to the control input of the first a video switch, whose input is combined with the input of the synchronization unit and connected to the output of the communication channel, characterized in that, with the aim of increasing the capacity of the communication channel, on the transmitting side enes three elements delayed

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The first and third video switches are connected in series between the first output of the spectral-zone video signal generation unit and the input of the full television signal generation unit, the second delay element, the second video signal switcher and the third delay element are connected in series between the second output signal of the third-party video signal generation unit and the third input of the third video signal switcher, and the third and the fourth outputs of the spectral zone video signal formation unit are connected to the second the inputs of the first and second video switches, respectively, the control inputs of the first, second and third delay elements are connected to the fourth output of the control and synchronization unit, and the first row recovery unit, the first delay element, the second video switch, the first the element recovery unit and the video output signal shaping unit are inserted and connected in series between the second output of the second video switch and the n / 2nd input video output unit and second delay unit; the second row recovery unit, the third video switch, the third element recovery unit, and the third delay element, whose output is connected to the () input video output unit, are entered and sequentially connected , entered and- enabled between second

the output of the third switch and the pm - the input of the output video signaling unit, the fourth element recovery unit, the averaging unit, the interpolation unit, the extrapolation unit and the weighted summing unit, whose inputs are connected to the corresponding outputs of the interpolation and extrapolation units, the unit outputs weighted summation is connected to the corresponding inputs of the output video signal forming unit; the first and second outputs of the first video switch are connected to the inputs of the first and torogo rows reduction units, which control inputs, and

The control inputs of the recovery units and the delay elements are connected to the second output of the synchronization unit, the third output of which is connected to the control inputs of the second and third video switches, the output of the second delay element is connected to the first inputs of the unit

averaging and extrapolation unit, the second inputs of which are connected to the output of the third delay element, the outputs of the first and fourth elements recovery block are connected to the first and second inputs of the interpolation unit, the third input of which is connected to the output of the averaging unit.

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Claims (1)

of the signals and the block for generating the full television signal, the second output is to the control inputs of the first and second video signal switches, and the third output is to the control input of the third video signal switch, and on the receiving side there is a synchronization block, the first output of which is connected to the control input of the first video signal switch, the input of which is combined with the input of the synchronization unit and connected to the output of the communication channel, characterized in that, in order to increase the throughput of the communication channel, the transmission side is introduced three delay elements, the first delay element, the first and third video signal switches connected in series between the first output of the spectral-zone video signal generating unit and the input of the full television signal generating unit, the second delay element, the second video signal switch and the third delay element are connected in series between the second output of the spectrozonal generating unit video signals and the second input of the third video switch, the third and fourth outputs of the block forming SP The electronic zone video signals are connected to the second inputs of the first and second video signal switches, respectively, the control inputs of the first, second and third delay elements are connected to the fourth output of the control and synchronization unit, and the first line recovery unit, the first delay element, and the second are introduced and connected in series on the receiving side a video signal switch, a first element recovery unit and an output video signal generating unit, are inserted and sequentially connected between the second output in of the second video signal switch and the n / 2 input of the output video signal generating unit, the second element recovery unit and the second delay element, the second line recovery unit, the third video signal switch, the third element recovery unit and the third delay element, the output of which is connected to ( n / 2 + 1) -th input of the output video signal generating unit, is inserted and included between the second .1368997 control inputs of the recovery units of the elements and delay elements are connected to the second output · syn chronization unit, the third output is to connected to the control inputs of the second and third switches with a video output of the third switch and the fifth input unit for generating the output video signals; the fourth element recovery unit, an averaging unit, an interpolation unit, an extrapolation unit and a weighted summation unit, the inputs of which are connected to the corresponding outputs of the interpolation and extrapolation units, the outputs of the weighted summation block are connected to the corresponding inputs 6L07 of the formation of the output video signals, the first and second outputs of the first cash s, the output of the second delay element is connected to the first inputs of the averaging block and the extrapolation block, the second inputs of which are connected to the output of the third delay element, the outputs of the first and fourth element recovery blocks are connected according to the video signal switch I e to the inputs of the first and second line recovery units, respectively, the control inputs of which, as well as the first and second inputs of the interpolation unit, the third input of which is connected to the output of the averaging unit.