SU752444A1 - Decoder - Google Patents

Description

one

The invention relates to telemechanics and can be used in discrete message transmission systems.

A decoder is known, j containing a code character recognition unit, the input of which is connected to the receiver output, the output of the code character recognition unit is connected to the input of the word reliability checker, Q service signal generator, switch, registers | 1.

However, such a device has a low reliability of receiving and processing groups of words and individual words.

The closest in technical essence to the proposed decoding device containing a symbol recognition unit, whose input is connected to the first input bus, the output of the character recognition unit is connected to the input of the word checker for reliability, the driver of service information, the output of which is connected to the 25th output bus, the second input and the second output bus 2.

This device also has insufficient reliability of receiving information.

The purpose of the invention is to improve the reliability of the reception and processing of information.

The goal is achieved by introducing a decoder, a storage unit, a word signal generator, a control unit and a comparison element, the first input of which is connected to the first output of the storage unit, the second input of the comparison element is connected to the first input of the control unit and connected to the second input bus, the output of the comparison element is connected to the first input of the overhead information generator and to the second input of the control unit, the third input of which is connected to the first input of the word driver, with a single second output from the second, the input of the overhead information processor, the output of the control unit, the first output of the confidence word checker and the output of the decoder are connected to the corresponding inputs of the storage unit, the second and third outputs of which are connected respectively to the second output bus and the first input of the second level and the third outputs of the word validation block for reliability are connected respectively to the input of the word signal generator and the decoder input.

The drawing shows a block diagram of the proposed device.

The scheme contains a symbol identification unit 1, a word verification word accuracy block 2, a word signal generator 3, a decoder 4, a storage unit 5, a service information generator 6, a control block 7, a comparison element 8, an input bus 9, an output bus 10, an input bus 11 output bus 12.

The device works as follows.

An information message from the receiver output is sent via bus 9 to the input of block 1 of character code identification, which generates pulses corresponding to the symbols of the applied code, after which they are fed to the input of block 2 of word verification for reliability. In this block of single characters (code combinations of words are formed and their validation is checked. If the received code combination satisfies the requirements of the reliability criterion, a confidence impulse is formed, according to which the word is written into the storage unit 5 at the address determined by the decoder 4 word numbers. After the word is recorded, the signal from the storage unit 5 in the imaging unit 3 generates a signal transmitting through the service information generator and the bus 11 to the sending point, on the other hand. this is about receiving the word.

When all m words are correctly received, they are successively written into the storage unit 5, which is completely filled, and the transmitting item receives signals for receiving m words. After filling in the storage unit 5, a signal is generated, which is transmitted to the imaging unit 3. With this signal, as well as confidence pulses in the imaging unit 3, the word reception signal is generated, according to which the memory management unit 7 transfers the storage unit 5 from the write mode to the read mode the recorded information. In this case, the information from the storage unit 5 via the bus 10 arrives at the subscriber, and the information is not destroyed upon discharge. The subscriber receives the information, checks it, writes it to the memory, and then returns it over the bus 12. In this case, the information received over the bus 12 is compared by the comparison element 8 with the information read by the signal of the control unit 7 from the storage unit 5. If received From the subscriber, the information is identical to the information contained in the storage unit 5, the comparison unit 8 generates a signal that is transmitted to the transmitting point via the reverse channel information generator 6 and the bus 11 to the transmitting point. it thus transmission of the next group of words. By the same signal, the control unit 7 transfers the storage unit 5 to the recording mode of information received from the word validation unit 2, thereby returning the device to the initial state.

The proposed device provides high reliability of receiving and processing an information message.

Claims (2)

1. USSR author's certificate number 364015, cl. G 08 C 25/02, 11,01.71 2. USSR author's certificate number 576581, cl. G 08 C 25 / 02,29.12.75 (prototype).