JPH0951326A - Information transmitting system/method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the transfer efficiency of a main signal and to transmit new information without the need of considerably adding and changing equipment. SOLUTION: An even/odd information generation means 12 generates even/ odd information 13 from transmission information 16 based on a prescribed allocation rule, and a parity insertion means 11 inserts a parity inspection bit into the main signal 15 based on a parity inspection system designated in even/ odd information 13 so as to be transmitted. A parity extraction means 21 extracts the parity inspection bit from the received main signal 5, recognizes the present parity inspection system and outputs corresponding even/odd information 23. A transmission information generation means 22 generates transmission information 26 from even/odd information 23 based on the prescribed allocation rule.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmission system and method, and more particularly to an information transmission system and method for transmitting arbitrary information using a parity check bit added to a main signal to be transmitted and received.

[0002]

2. Description of the Related Art Conventionally, when information other than a main signal, such as information about a fault or information about an operating state of a transmission line, is exchanged between devices transmitting and receiving the main signal, a dedicated information transmission bit ( Fixedly provided in advance,
This information transmission bit has been used to transmit various management information and the like.

[0003]

Therefore, in such a conventional information transmission method, since the information transmission bits fixedly provided in the main signal are used, a large number of information transmission bits are provided. If there is not, or if the number of types of information to be transmitted other than the main signal is more than the prepared transmission bits, the format of the main signal is changed to add new information transmission bits, Alternatively, it is necessary to provide a transmission path different from that of the main signal, which causes a problem that the transmission efficiency of the main signal is reduced by adding bits and that the original information transmission system needs to be significantly changed or equipment added. there were.

The present invention is intended to solve such a problem, and it is possible to maintain the transfer efficiency of the main signal and to transmit new information without requiring a large additional change of equipment. It is intended to provide a method of transmitting information.

[0005]

In order to achieve such an object, an information transmission system and method according to the present invention presents a parity check method for transmitting information to a transmitting device based on a predetermined allocation rule. The even-odd information generating means for generating even-odd information, and the parity insertion means for inserting the parity-check bit into the main signal based on the parity-check method indicated by the even-odd information and transmitting the parity signal are provided to the receiving device. Parity extraction means for extracting the parity check bit from the main signal, recognizing the current parity check method, and outputting even / odd information indicating the parity check method,
Transmission information generating means for generating transmission information corresponding to the even-odd information based on the allocation rule.

Therefore, the transmitting apparatus inserts the parity check bit into the main signal based on the parity check method indicated by the even / odd information generated by the even / odd information generating means, and the receiving apparatus receives the parity check bit. The parity check bit is extracted from the main signal to recognize the current parity check method, the even-odd information indicating the parity check method is output, and the transfer information generating means generates transfer information from this even-odd information, The transmission information is transmitted from the transmission device to the reception device.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an information transmission method system according to an embodiment of the present invention. In FIG.
1 is a transmitter for transmitting the main signal 5, 2 is a receiver for receiving the main signal 5, 3 is the main signal 5 transmitted from the transmitter 1.
Is a transmission path for transmitting to the receiving device 2.

In the transmitter 1, reference numeral 10 is a transmitter for transmitting a predetermined main signal 15 to the transmission line 3, and transmits desired transmission information 16 to be transmitted to the receiver 2 based on a predetermined allocation rule. It has an even-odd information generating means 12 for generating the even-odd information 13, and a parity insertion means 11 for inserting a parity-check bit in the main signal 15 based on the parity-check method shown by the even-odd information 13.

In the receiving device 2, reference numeral 20 is a receiving section for receiving the main signal 5 transmitted from the transmitting device 1 via the transmission path 3. The main signal 25 is obtained by extracting a parity check bit from the received main signal 5. And the parity extraction means 21 for outputting the even / odd information 23 indicating the current parity check method, and the transmission information generation means for generating the even / odd information 23 based on a predetermined allocation rule and outputting the transmission information 26. 22 and 22.

Next, the operation of the present invention will be described with reference to FIG. FIG. 2 is a timing chart showing the operation of the present invention. In addition, even-odd information 1 indicating the parity check method
As an allocation rule for assigning the transmission information 16 and 26 to 3 and 23, “OFF” of the transmission information 16 and 26 is assigned to the even parity check method and the transmission information 16 and 26 of the odd parity check method are assigned. It is assumed that “ON” is assigned, and these assignment rules are set in advance in the even / odd information generation means 12 of the transmission device 1 and the transmission information generation means 22 of the reception device 2.

First, the transmission information 16 on the transmitter 1 side is "O".
In the case of “FF”, the even / odd information generation unit 12 outputs “even”, that is, the even / odd information 13 indicating the even parity check method based on the above-mentioned allocation rule. In accordance with the even / odd information 13, the parity insertion means 11 inserts the parity check bit generated based on the even parity check method into the main signal 15 and transmits it as the main signal 5 to the transmission line 3.

As the parity check method, there are an even parity check method and an odd parity check method, as shown in FIG. FIG. 3A shows an even parity check method, and parity is set so that all the bits forming the data 31 of a predetermined length and the parity check bit 32 have an even number of bits indicating “1”. Check bit polarity "0
This is a method of setting "/ 1". In this case, data 31
Since there is an odd number (5) of "1" in "1", "1" is set as the parity check bit 32.

On the other hand, FIG. 3 (b) shows an odd parity check system, in which all the bits constituting the data 31 of a predetermined length and the parity check bit 33 are
In this method, the polarity "0/1" of the parity check bit is set so that the number of bits indicating "1" becomes an odd number. In this case, since the data 31 has an odd number (5) of "1", "0" is set as the parity check bit 32.

Therefore, in the parity insertion means 11,
Since the even / odd information 13 indicates “even”, that is, the even parity check method, the parity check bits 32 are sequentially inserted into the main signal 15 based on the even parity check method shown in FIG. It is transmitted to the transmission line 3.

The main signal 5 is received by the parity extraction means 21 of the receiving device 2, the parity check bit corresponding to each data is extracted, and the current parity check method is judged. For example, when the data 31 and the parity check bit 32 as shown in FIG. 3 (a) are received, the number of "1" s of all the bits configuring them is counted,
Since the number is even, it recognizes that the current parity check method is the even parity check method, and outputs “even”, that is, the even / odd information 23 indicating the even parity check method.

As a result, the transmission information generating means 22 transmits the transmission information 2 corresponding to the even / odd information 23 indicating "even", that is, the even parity check method, based on the above-mentioned allocation rule.
6, the output here is "OFF",
This means that the transmission information 16 on the transmitting device 1 side is transmitted as the transmission information 26 on the receiving device 2 side.

Further, the transmission information 16 on the transmitting device 1 side is "O".
In the case of “N”, contrary to the above, the even-odd information generation means 1
2 produces and outputs even-odd information 13 indicating "odd", that is, an odd parity check method, and in response to this, the parity insertion means 11 causes the parity check bit as shown in FIG. 33 is inserted and transmitted as the main signal 5 to the transmission line 3.

The main signal 5 is received by the parity extraction means 21 of the receiving device 2, the parity check bit corresponding to each data is extracted, and the current parity check method is judged. For example, when the data 31 and the parity check bit 33 as shown in FIG. 3 (b) are received, the number of "1" s of all the bits forming them is counted,
Since the number is odd, it recognizes that the current parity check method is the odd parity check method, and outputs “odd”, that is, the even / odd information 23 indicating the odd parity check method.

As a result, the transmission information generation means 22 transmits the transmission information 2 corresponding to the even / odd information 23 indicating the "odd" or odd parity check method based on the above-mentioned allocation rule.
6, "ON" is output here, and the transmission information 16 on the transmitting device 1 side is the transmission information 2 on the receiving device 2 side.
It was transmitted as 6.

As described above, the even / odd information generation means 12 of the transmission device 1 generates the even / odd information 13 from the transmission information 16 based on a predetermined allocation rule, and the parity insertion means 11 is used.
Thus, the parity check bit is inserted into the main signal 15 based on the parity check method specified by the even / odd information 13 and transmitted, and the parity extraction means 21 of the receiving device 2 extracts the parity detection bit from the received main signal 5. It extracts and outputs the even / odd information 23 indicating the current parity check method and the parity check method, and the transmission information generation means 22 generates the transmission information 26 from the even / odd information 23 based on a predetermined allocation rule. It was done like this.

Therefore, the transmission efficiency of the main signal is lowered by changing the format of the main signal to add a new information transmission bit or by providing a transmission line different from the main signal as in the conventional case. In addition, new information other than the main signal can be transmitted without making major changes or adding equipment to the original information transmission system.

[0022]

As described above, according to the present invention, the transmitting device is provided with the even / odd information generating means for generating the even / odd information indicating the parity check method corresponding to the transmission information based on the predetermined allocation rule, and the receiving device is also provided. The device, based on the allocation rule, provided with transmission information generating means for generating transmission information corresponding to even-odd information, from the transmission device, based on the parity check method indicated by the even-odd information from the even-odd information generation means, The parity check bit is inserted into the main signal and transmitted, the receiving device extracts the parity check bit from the received main signal, recognizes the current parity check method, outputs the corresponding even / odd information, and transmits it. By the information generation means,
The transmission information is transmitted from the transmitting device to the receiving device by generating the transmission information from the even-odd information.

Therefore, the transmission efficiency of the main signal is lowered by changing the format of the main signal to add a new information transmission bit or by providing a transmission line different from the main signal as in the conventional case. In addition, new information other than the main signal can be transmitted without making major changes or adding equipment to the original information transmission system.

[Brief description of drawings]

FIG. 1 is a block diagram of an information transmission system according to an embodiment of the present invention.

FIG. 2 is a timing chart showing the operation of the information transmission system.

FIG. 3 is an explanatory diagram showing a parity check method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transmission device, 10 ... Transmission part, 11 ... Parity insertion means, 12 ... Even / odd information generation means, 13 ... Even / odd information, 15 ...
Main signal, 16 ... Transmission information, 2 ... Receiving device, 20 ... Receiving section, 21 ... Parity extracting means, 22 ... Transmission information generating means, 23 ... Even / odd information, 25 ... Main signal, 26 ... Transmission information,
3 ... Transmission path, 5 ... Main signal.

Claims (2)

[Claims] 1. An information transmission system for transmitting predetermined transmission information from a transmission device transmitting a main signal to a reception device receiving the main signal, wherein the transmission device transmits the transmission information based on a predetermined allocation rule. An even-odd information generation unit that generates even-odd information that indicates the corresponding parity check system, and a parity insertion unit that inserts a parity check bit into the main signal based on the parity check system shown by the even-odd information and transmits the parity signal. Comprising, the receiving device, to recognize the current parity check method by extracting the parity check bit from the received main signal, the parity extraction means for outputting even-odd information indicating the parity check method, based on the allocation rule, An information transmission system comprising: transmission information generation means for generating transmission information corresponding to the even-odd information. 2. An information transmission system for transmitting predetermined transmission information from a transmission device transmitting a main signal to a reception device receiving the main signal, wherein the transmission information is transmitted to the transmission device based on a predetermined allocation rule. While providing even-odd information generating means for generating even-odd information indicating the corresponding parity check method, the receiving device is provided with transfer information generating means for generating transfer information corresponding to even-odd information based on the allocation rule. The transmitting device inserts a parity check bit into the main signal based on the parity check method indicated by the even / odd information generated by the even / odd information generating means, and transmits the parity check bit, and the receiving device checks the parity from the received main signal. Bits are extracted, the current parity check method is recognized, even-odd information indicating the parity check method is output, and this is transmitted by the transmission information generation means. By generating output information from the even-odd information, information transmission method being characterized in that so as to transmit the transmission information to the receiving device from the transmitting device.