SU645153A1 - Device for compression of data with adaptation by the number of generalized coordinates - Google Patents

Description

The aim of the invention is to increase the information content of the device, which is denied by increasing the compression ratio and transmitting data from a given database.

m

2iV, | ed

OK -Var (1

The goal is achieved by adding an adder, a comparison unit, an additional trigger, an additional differentiating element, and mod-formers to the device, the inputs of which are connected to the corresponding key outputs, and the outputs connected to the inputs of the adder, the output of which is connected to the first input of the comparison unit, the second input. which is connected to the master input of the device, the output of the comparator unit is connected to the single input of an additional trigger, the output of which is connected to the input of the additional differentiating element When the output is connected to the zero inputs of the flip-flops and to the control input of the coding block, the zero input of the additional trigger is connected to the clock input of the device.

A device for compressing data with adaptation according to the number of generalized coordinates is explained by the block diagram presented on the next page, where: analyzer 1, discriminators 2, keys 3, generator 4 sawtooth voltages, differentiating elements 5, triggers 6, encoding unit 7, shapers 5 moduli of number, adder 9, block 10 of comparison, additional trigger 11, additional differentiating element 12.

The device works as follows. After the arrival of the clock pulse, the trigger 11 is directly, and the trigger 6, after triggering the trigger // and element 12, is reset to zero, and the analyzer outputs — the generalized coordinates — are converted by the discriminator 2 and generator 4 to the pulse width. After differentiating the output signals of discriminators 2 by means of elements 5, pulses arrive at the setup inputs to trigger unit 6, which closes keys 5. Thanks to pulse-width coordinate transformation, first keys 3, which commute coordinates with the lowest values, are closed. These coordinates are passed through the corresponding blocks 8 to the adder 9, and then the output voltage of the adder 9 is compared with the permissible level of the maximum error bd. As soon as the output voltage of the adder 9 becomes equal to or greater than “g, block 10 is activated and flips the trigger // to

state "units. The trigger // through the element 12, in turn, sets in the state of "zero triggers 6, which open the keys. Due to this, the coordinates, the sum of the modules of which constitute the admissible error of the EC, will not be connected to. the inputs of block 7. The essential coordinates will be connected, because they correspond to

the triggers 6 will work as the discriminators 2 function after the operation of block 10, trigger // and element 12. The operation of block 7 is also determined by the triggering of blocks 10,

// and 12.

Thus, in the device at each approximation interval O, T, only the necessary part of the generalized coordinates (e.g., Walsh coefficients) is transmitted, which allow the signal to be restored with the specified maximum error along the entire length of the realization. In this case, the data compression ratio will be the maximum possible for any input signal, approximated with an error of 8d in a given basis.

Formula of Invention

A device for compressing data with an adaptation according to the number of generalized coordinates, containing an analyzer whose input is connected to the input of the device, and the outputs are connected to the inputs of the corresponding keys and the first inputs of the corresponding

discriminators, the second and third inputs of which are connected to the corresponding outputs of the sawtooth generator, the clock input of which is combined with the clock input of the analyzer and connected to the synchronization input of the device, the outputs of the discriminator are connected via differentiating elements to the single trigger inputs whose outputs are connected to the control inputs of the corresponding keys whose outputs are connected to the inputs of a coding block connected to the output of the device, characterized in that, in order to increase Informativity by increasing the compression ratio; in the device, an adder, a comparison unit, an additional trigger, an additional differentiating element, and modulators of the number, whose inputs are connected to

the corresponding outputs of the keys, and the outputs are connected to the inputs of the adder, the output of which is connected to the first input of the comparison unit, the second input of which is connected to the master input of the device,

the output of the comparator unit is connected to the single input of the additional trigger, the output of which is connected to the input of the additional differentiating element, the output of which is connected to the zero inputs of the triggers and the control input of the coding unit, the zero input of the additional trigger is connected to the synchronizing input of the device. Sources of information, received by v5 attention during the examination: 1. Manovtsev A, P. Fundamentals of the theory of radio telemetry, M., Energia, 1973, p. 450-47. 2. “Foreign Radio Electronics, 1972, No. 5, p. .