SU696520A1 - Adaptive device for transmitting information - Google Patents

Description

(54) ADAPTIVE DEVICE FOR TRANSFERING INFORMATION

The invention relates to the field of radio telemetry and can be used in adaptive telemetry systems. Known adaptive information devices containing a block of compression, a block of buffer memory and a full-size sensor 1, the disadvantage of these devices is the loss of accuracy of information recovery due to overflow of the block of buffer memory. Thus, in the areas of active change of the measured processes, which are usually the most interesting from the informational point of view, the quality of the information transmitted to the receiving point deteriorates. Also known are devices for transmitting information, comprising an information processing unit, memory blocks, logic elements, and a memory overflow indicator 2. In the known devices, the problem of increasing the accuracy of the device is solved by tracking the buffer memory overflow. The closest to the technical entity is an adaptive device for transmitting information, containing a current sample register, the output of which is connected to the first input of the comparator unit, the second input of which is connected to the output of the operational storage unit, the first output of the comparison unit is connected to the first input of the control value register , the output of which is connected to the first input of the operational storage unit, the output of the read generator, respectively, through a read counter and the first delay element is connected to the pen the out and the second input of the buffer storage unit, to the third input of which the second output of the comparison unit is connected via a bit register, the output of the recording generator is connected to the first inputs of the first and second elements And, to the second inputs of which the first and second outputs of the filling control unit are p. , the outputs of the first and second elements And are connected to the input of the OR element, the output of which, respectively, the record counter is connected to a quarter of the input of the buffer junction block and through the second delay element with fifth input buffer memory unit and the first input of the filling control, the second input of which is connected to the output of the first delay element, the output of the buffer memory unit | through output register connected to the output device 3.

The disadvantage of the known device is in the vehicle and that, when a significant sample is lost due to an overflow of the storage buffer of the buffer block, which occurs when the measured processes change intensively, the code of this sample is written to this block, and therefore all subsequent incoming samples are compared in the block Comparison with this significant sample, although it is lost and is not transmitted to the receiving point. Thus, the error in restoring the compressed process increases significantly.

The purpose of the invention is to increase the reliability of information transfer.

For this, the third and fourth elements I are entered into the adaptive information transfer device, the first inputs of which are connected respectively to the third and fourth outputs of the comparison unit, the second inputs are connected to the first output of the filling control unit, the output of the third element I is connected to the second input of the operational storage unit , the output of the fourth element And is connected to the second input of the register of the control value and to the third input of the first element I..

The drawing shows a block diagram of the proposed device.

It contains the current sample register 1, the comparison unit 2, the operative storage unit 3, the bit register 4, the central value register 5, the buffer storage unit b, the filling control unit 7, the write generator 8, the first element 9, the second element 10, the OR 11 element, the write counter 12, the first delay element 13, the read generator 14, the read counter 15, the second delay element 16, the output register 17, the third element AND 18, and the fourth element AND 19.

The proposed device works as follows.

the input of register 1 receives the binary code of the next sample. Using the codes of significant samples stored in block 3, block 2, by any compression algorithm, is determined by comparing the codes from block 3 and register ;. character, sampling, i.e. whether the received sample is substantial or redundant. In this case, the code of the received sample is entered on

Register 4 is redundant or substantial.

The operation of the device is controlled by block 7, which records how many cells in the buffer memory of the block are occupied at that moment. With all the filled cells at the output of the recording resolution of block 7, the zero signal occurs (writing to block b is prohibited), and in other cases - one (writing to block b is allowed). With all the empty cells at the output of the forced recording, there is a single signal (any block can be recorded in block b), and in other cases x is zero.

If block 2 of the comparison determines that the received sample is redundant, its code is not recorded in block 3 and the code of the next sample will be compared with the same code of the essential sample with which the given sample was compared.

If the sample is significant, then at the output of the non-redundancy of block 2 there is a signal of non-redundancy, which, passing through the fourth element And 19, in the presence of a single signal at the output of the recording resolution of block 7, makes the initial setting of register 5, and also enters the first input of the first element And 9. Subsequently, the code of the substantial sample is written through register 5 into block 3 by a write pulse from the synchronization output of compare block 2, which passes through the third AND 18 element in the presence of a single signal at the write enable output Lok 7, i.e. Only in the event that the memory cells of the block were you not all. Thus, entering into the code 3 of the code of a new substantial sample is possible only when there are free cells in the block b, since only in this case the output of the recording resolution of block 7 contains a single signal and the elements 18 and 19 are open to pass the recording pulse and sinal redundancy respectively.

Claims (3)

1.Olhovsky Yu. B. et al. Data compression during telemetry, Moscow, Soviet radio, 1971, p. 143-145. 2. USSR author's certificate  512484, cl. G. 08 C 19/28, 0404.74 3. USSR author's certificate number 506909, cl. G 08 C 19/28, 28.04.72.