SU594592A1 - Code converter - Google Patents

Description

The invention relates to a telegraph communication technique and can be used in information exchange systems between devices using seven- and five-element international codes.

As is known, a code conversion device comprising a command sensor, a decoder and a serially connected switch, an encoder and a matching unit, the first output of which is connected to the first input of the command sensor whose outputs are connected to the second input of the matching unit and the first input of the descrambler respectively, output which is connected to the second input of the encoder 1.

However, this device is characterized by insufficient conversion accuracy.

The purpose of the invention is to improve the accuracy of the conversion.

For this, a device for converting codes containing a command sensor, a decoder and a serially connected switch, an indexer and a matching unit, the first output of which is connected to the first input of the command sensor, the outputs of which are connected respectively to the second input of the matching unit and the first input of the descrambler whose output is connected to the second input of the encoder, the drive and subsequently connected are entered

the analyzer and symbol driver, the output of which is connected to the third input of the equalizer, the second input of which is connected to the control input of the analyzer, the second and third outputs of which are connected respectively to the input of the switch and the second input of the command sensor, the additional outputs of which are connected to the inputs of the analyzer and storage device, output which is connected to the second decoder, and the second output of the matching unit is connected to the auxiliary input of the drive.

The drawing shows a structural electrical circuit of the proposed device.

The device for converting codes contains a 1-command sensor, a decoder 2 and a serially connected switch 3, an encoder 4 and a matching unit 5, the first output of which is connected to the first input of the command sensor 1, the outputs of which are connected respectively to the second input of the matching unit 5 and the first input of the decoder 2, the output of which is connected to the second input of the encoder 4, the drive 6 and serially connected analyzer 7 and the driver of 8 characters, the output of which is connected to the third input of the encoder 4, the second input of which One with the control input of the analyzer 7, a second

and the third outputs of which are connected respectively to the input of the switch 3 and the second input of the command sensor 1, the additional outputs of which are connected to the inputs of the analyzer 7 and the accumulator 6, the output of which is connected to the second input of the decoder 2, and the second output of the matching unit 5 is connected to the additional input of the accumulator 6 .

The device works as follows.

The command sensor 1 sets the required type of code conversion. Information is exchanged with external devices using matching unit 5. Input symbols from matching unit 5 are received via information input 9 into drive 6, with a capacity of n characters. The capacity of the accumulator 6 is selected based on the number of symbols in the sequence, which is composed of their low probability combination and is equivalent to C11vv or a group of characters of another code. For example, the control symbol of the semielement code 0/1 - “Start-in header” can be chosen as the equivalent of a sequence of characters “AIFN of the five-element code: When the accumulator 6 is full, information is entered character-by-character from the first through the nth through information input 10 to decipher 2, where the symbol is decrypted, and from the output of decipher 2 comes through information chip 9 to analyzer 7. In analyzer 7, it is checked whether the accumulated sequence is equivalent to the symbol or group of symbols of the other code. If the test establishes the presence of equivalence, then from output 12 of analyzer 7, a command is sent to the 8-shaper generator to generate the corresponding symbol or group of characters in the transformed.m code received via information input 13 to the equalizer 4. The switch determines the operation of the equalizer 4 3. Getting control from the output 14 of the analyzer 7, it distributes the converted characters to the registers. From the output of the encoder 4, the information enters the matching unit 5. When the process of converting the initial sequence is completed, the command sensor 1 sends a command to the input 15 of the accumulator b to erase the accumulated sequence. If the check in the analyzer 7 determines that the accumulated sequence of accumulator 6 is not equivalent to a symbol or a group of symbols of another code, then the first symbol from accumulator b goes to decoder 2 and is decrypted. If it belongs to the fifth element code and is not a Digits register, then it comes from the output of the decoder 2 to the information input, 16 to the encoder 4 and is directly transformed into the corresponding symbol of the seven-digit code. If this character is a Digits register, then by the signal from the output 17 of the analyzer 7, the sensor 1 of the commands at input 15 of drive 6 provides for erasing the first character. If the symbol under consideration belongs to the seven-element code and is contained in the alphabet of the five-element code, then the analyzer 7 determines the register in which

this symbol is located and controls, at output 14, switch 3, which encrypts this symbol with an encoder. If it is necessary to change the register, the analyzer 7, at output 12, will give the command to the shaper of 8 characters, which at the input 13 of the encoder 4 forms the corresponding new register and places it in front of the convertible simvo.domain. If the symbol under consideration is absent from the alphabet of the 5-element code, the shaper of 8 characters, after receiving control from the analyzer 7, provides for the generation of the corresponding sequence equivalent to this symbol in the 5-element code. Memorization, comparison, change and formation of registers of convertible codes is carried out by the analyzer 7, the control switch 3 and the driver of 8 characters, at inputs 14 and 12, respectively. When the process of converting the original character is complete, the command sensor 1 gives a command to the drive 6 to shift the information. The first character takes the second character, and so on, freeing the nth character cell to receive the next input 9 from the matching unit 5. The process of analyzing the contents of accumulator b and converting characters is repeated.

Thus, the proposed device improves reliability, eliminates the loss of information when switching information symbols into control symbols or transferring control symbols into information symbols, and also provides the possibility of complete conversion of alphabets of seven- and five-element codes.

Claims (1)

1. USSR author's certificate “498746 cells. H 04 L 3/02, 1973.