SU702402A1 - Adaptive device for reducing information redundancy - Google Patents

Claims (2)

The invention is responsive to telemechanics and can be used in multichannel systems to reduce information redundancy. Multichannel transmitters are known that contain an information source, a block for decomposition coefficients, a block of key elements, a linearly varying voltage generator, a trigger, a binary counter, or OR fl. The drawbacks of the device are that it does not allow the degree of signal compression to be suppressed, depending on the bandwidth of the multi-channel path, and also that the transmitted compressed messages have significant redundancy. The adaptive device for reducing redundancy is the closest in technical terms to this. information containing the source of information, the output of which is connected via the information conversion unit with the inputs of the comparison unit, the analog-code converter unit, bpok with dummators, control unit, buffer buffer unit, codogram generator, the output of which is connected to the Swazi channel 2J. The device has a low compression effect due to the fact that it does not allow to adjust the level of the signal depending on the capacity of the traffic path. The aim of the invention is to increase the informativeness of the device ways to increase the compression ratio of information. This is achieved by the fact that the activity analyzer is entered into the device, the memory unit, the register of attributes are detected (the comparison unit, the output of the information source is connected to one of the inputs of the control unit through the activity analyzer, the other input of which is connected to the output unit control unit is connected to the same inputs of the memory block, the block of adders, the comparison block, the conversion block of the formation, the block of converters analogue code, the block of buffer registers, is formed coding patterns and the register of features, control outputs of the control unit are connected to the inputs of the comparison blocks, characteristics register. and i block of buffer registers, outputs of registers of attributes and block of buffer registers are connected to the inputs of the codogram former; outputs of the block of adders are connected to the first group of inputs This module is connected to the memory block inputs, the outputs of which are connected to the second group of inputs of the additional comparison block. The block diagram of the device shown in the drawing. The device contains information source 1, information conversion unit 2, comparison block 3, analog-code converter block, buffer register block 5, codogram generator 6, activity analyzer 7, register of 8 attributes, block 9 of adders, block 10 of memory, block 11 of comparison , block 12 controls. The device works as follows. When a useful signal appears at the output of the information source 1, the Activity Analyzer 7 issues a start signal to the control unit 12, which issues a command to the 6 kbdogram generator to form the initial service codogram. This codogram causes the receiver to turn on. The control unit 12 fills the register of 8 features with units. The useful signal is decomposed by information converting unit 2 in accordance with the direct Walsh-Fourier transform into coefficients. The values of these coefficients are transmitted to the comparison unit 3, which zeroes the coefficient Ef, the STANDARD koTbpbix mSHT wn (specified by the control unit) and fills those 8 bits of the register with 8 signs that correspond to these zero coefficients. Block 4 of transducers, the analog encrypts the values of the coefficients in discrete form and sends them to block 5 of the buffer registers and block 9 of adders. Block 9 of adders produces the summation of coefficients of the same frequency, the total coefficients are memorized in the memory cells of block 10 until the next cycle and used to estimate the spectral properties of the signal in the decomposition interval, in subsequent cycles the total coefficients are stored in memory cells transmitted to the communication channel last. According to the signal from the control unit, the code pattern generator 6 generates the information part of the code pattern as follows. At first, the contents of the register of attributes (mask) are transmitted, then they are selected from the block of buffer registers and transmitted, according to the order, decomposition coefficients, which are different from zero. On the receiving side, the distribution of the coefficients is made by the PB of the received mask. When transmitting the second and subsequent codograms by the comparison unit 11, the current values of the coefficients obtained in the adder are compared with the values of the total coefficients stored in the memory cells of the block 10, if their difference does not exceed the threshold set by the control unit (i.e., the signal in this cycle similar to the signal in the previous cycle), the control unit prohibits the transmission of information to the codogram generator. When the signal is restored at the receiving side, the coefficients received last from the communication channel are used in this cycle. Thus, redundancy of information redundancy & ness in the device is obtained twice, and the control unit 12 has the ability to vary the threshold values in comparison units 3 and 11 in accordance with the workload of the communication channel. When the useful signal is terminated, the aqmus analyzer 7 supplies the end of work signal to control unit 12, which gives the command to the command builder to form the final service record. The proposed device allows to reduce the redundancy of information transmitted over the communication channel. An Adaptive Device for Reducing Information Redundancy, containing an information source, the output of which is connected through an information conversion unit, with inputs of a comparison unit, an analog-code converter unit, an adder unit, a control unit, a buffer register unit, a codogram driver, the output of which is connected with a communication channel, about tl and more often because, in order to increase the information content of the device by increasing the compression ratio, an activity analyzer, memory block, register are entered into the device features and an additional comparison unit, the information source output is connected to one of the control unit inputs through the analyzer, the other input of which is connected to the output of the additional comparison unit, the synchronization output of the control unit is connected to the same inputs of the memory unit, the block of adders of the comparison unit, block information conversion, converter block 7 2 analog-code, buffer register block, codegram generator and feature register, control outputs of the control block are connected to one The inputs of the comparison block, the register of signs and the coder, the outputs of the comparison block are connected to the corresponding inputs of the register of signs and the analog-code converter block whose outputs are connected to the inputs of the block of adders and the block of buffer registers, the outputs of the register of tags and the block of buffer registers are connected with. the inputs of the codogram imager, the outputs of the block of adders are connected to the first group of inputs of the additional unit of comparison and the inputs of the memory block whose outputs are connected to the second group comparing unit moves dopopnitelnogo .. Information sources, the received note in the examination 1, the foreign electronics Journal, № 5, 1972, p. 29. 2.Air space telemetry. Ed. K. N. Trofimov M., 1968, p. 193-197 (prototype).