SU345503A1 - DEVICE FOR COMPRESSION INFORMATION - Google Patents

Description

The proposed device relates to telemetry and is intended to reduce the redundancy of information transmitted over a distance. ,

Devices for compressing information are known that contain on the transmitting side a matching circuit, an information selection unit, the output of which is connected to the information input of the information input unit to the communication channel via a readout key, and an adaptive sampler, the input of which is connected to the information selection unit through an input key. and, the first output through the output key is connected to one of the address inputs of the information input unit to the communication channel, and the second output is connected to one of the trigger inputs, the output of which is connected to the control input in walking key. At the receiving side, the device contains an approximator, the output of which is connected via an output key to the input of the registration unit, and the input is connected via the input key to the first output of the information output unit from the communication channel, the second output of which is connected to the input of the decoder.

However, the known devices use only one type of approximating functions, therefore, with low a priori information about the signals, the efficiency is low.

The predlozhenny device is characterized in that it contains groups of adaptive discrete samplers and approximators, with the first outputs of the adaptive samplers on the transmitting side connected to the inputs of the coincidence circuit, the output of which is connected to the other trigger inputs and control keys of the counting and output keys, and on the receiving side first output of the decoder

it is connected to one and the second to the other control inputs on the input and output keys. ;

This allows the use of several approximating functions of a different type, and

as an output, information is issued without accessing the adaptive sampler, which squeezes the signal most efficiently in a given area of its processing.

FIG. 1 and 2 are respectively

transmitting and receiving parts of the device.

The device works as follows.

Signals from the sensor through the unit

selection information / using open

input keys 2i-2n come immediately to

all adaptive samplers. Depending on the proximity of the signal to the approximating functions, at a given constant error of its processing, adaptive samplers operate at different times.

fixing the corresponding time points of the deviation of the signal from the apyroximating functions by the value of the given height. At the same time, from the output of the sampler J, - a short pulse is fed to one of the inputs of the corresponding trigger 4,; as well as to the inputs of the output key 5, - and the memory 6 soviadsmnsh circuit.

The trigger 4 {on the front of the 1st front of the incoming pulse changes its state and closes the input key 2; with its output signal. As a result, there is no longer available for the corresponding adaptive dskretizator 5, -. The rest of the discretizers continue to work. When the last of them is triggered 3j (informative) but the leading edge of its output signal, a coincidence circuit 6 is activated. The output key also opens the counting key 7 and the output key 5 on the leading edge; connected to the dnscatcher 5.;. The durations of the signals from the dnstillator and from the coincidence circuit 6 coincide.

Through the readout key 7 from the information selection block J, the measurement signal is sent to the information input unit 8 into the communication channel (CS). In block 5 it also sends through the output key 5; the impulse that carries information about the address of the sampler 5j and the point in time fj of the signal reference. The address is determined by the physical shred of the pulse received from the output key 5j. In block 8, if necessary, noise-tolerant coding of the address of the informative sampler 3i, the reference time / j (or the interval between readings) and the value of the measurement signal at time tj is performed.

By a signal from the output of the coincidence circuit 6 on its falling edge, the triggers return to their initial state and the keys 2i-2n are opened. The measurement signal is again fed to the ds-selectors 9i-3p, and the process of determining the largest possible sampling interval is repeated.

The information received from the CS is sensed by the information output unit 9 from the CS. At the moment the address signal arrives, a pulse is sent to the decoder 10 from its output, closing the input // i - // // and output keys. With these keys, the proximizers are disconnected from the block .9 and from the recording units 14 and the display 15.

After decrypting the address of the informative sampler 3} from the output of the decoder 10, a signal is received to turn on the corresponding keys // and 2j, and one of the approximators 13j receives from block 9 data on the readout values of the measuring signal and time.

Approximators Y ,, use functions similar to those selected in the discretization 5i-3n-3. Recovery of the syngnal in one or another approximator continues until the information about the next sampling interval arrives.

Switching of keys //: - // "and possessing memory can be made by rectangular-shaped emulsions. In this case, the keys are closed at the leading edge of the pulse, and their opening at the falling edge.

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Subject invention

A device for compressing information containing on the transmission side of the scheme is the same, the information selection block, the output of which is connected to the information input of the information input block into the communication channel through the readout key, and adaptive samplers, each input of which is connected through the corresponding input key to the output of the block

selection of information, the first output through the corresponding output key is connected to one of the address inputs of the information input unit into the communication channel, and the second output is connected to one of the inputs of the corresponding

the trigger, the output of which is connected to the control input of the corresponding input key, on the receiving side are approximators, the output of each of which is connected to the output through a corresponding output key

to the input of the registration unit, and the input through the corresponding input key is connected to the first output of the information outputting unit from the communication channel, the second output of which is connected to the input of the decoder, characterized by

so that, in order to increase the compression of information, in it on the transmitting side, the first outputs of adaptive samplers are connected to the inputs of the coincidence circuit, the output of which is connected to the other inputs of flip-flops and

to the control inputs of the readout and output keys, and on the receiving side, the first output of the descrambler is connected to one, and the second to the other control inputs of the input and output keys.