JPS62279739A - Envelope data transmission system - Google Patents

Abstract

PURPOSE:To enhance the transmission efficiency of data by converting a unipolar signal into a bipolar signal corresponding to the inputted state information so as to transmit on transmission side and controlling an envelope decomposing circuit so as to divide a data output and a state information output on reception side. CONSTITUTION:On transmission side, a frame bit generated in a frame pattern generation circuit 1 and data from a data input IN1 are envelope composed 2. Meanwhile according to the state of a state information input IN2, the frame bit is violation controlled 3 and a unipolar signal of an envelope assembly circuit 2 is converted into a bipolar signal in a unipolar-bipolar conversion circuit 4 and it is outputted. On the other hand, on reception side, an input bipolar signal is bipolar-unipoliar converted 5 and the output is violation detected 6 and envelope synchronized 7. The respective output signals are conducted to an envelope decomposing circuit 8 and the state information is reproduced based on the presence or absence of the violation of the frame bit, a state signal OUT2 is outputted, while an envelope signal is decomposed and a data output OUT1 is outputted.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an envelope data transmission method for digital data communication.In particular, in base hand envelope transmission, bipolar bio This invention relates to an envelope data transmission method that transmits state information using rations.

〔overview〕

In an envelope data transmission method for digital data communication, the present invention transmits status information "on" and "off" in correspondence with the presence or absence of violation of frame bits, thereby eliminating the need for status bits in envelope signals. By doing so, it is possible to increase data transmission efficiency without unnecessarily increasing transmission speed.

[Conventional technology]

Conventionally, in the baseband envelope data transmission method in digital data communication, transmission was performed using an envelope configuration consisting of frame bits F, data bits D, and status bits S, as shown in Figure 3. .

[Problem that the invention seeks to solve]

The conventional envelope data transmission method described above has the characteristic that the status information corresponding to the status bit maintains the same status for a very long time, indicating whether or not it is in a data communication status. Therefore, although the information rate is low, the transmission rate is generally unnecessarily high because it is determined by envelope transmission, and furthermore, data transmission efficiency is low due to the status bit transmission.

SUMMARY OF THE INVENTION An object of the present invention is to provide an envelope data transmission method that eliminates the above drawbacks and improves data transmission efficiency without unnecessarily increasing the transmission speed.

[Means for solving problems]

The present invention provides an envelope data transmission method for digital data communication, in which a frame pattern generation circuit, an envelope assembly circuit which inputs the output of the frame pattern generation circuit and a data bit node and assembles an envelope signal, and status information are provided on the transmission side. a violation control circuit that controls the violation of input frame bits; and a unipolar/bipolar conversion circuit that converts the envelope signal into a bipolar signal and provides a violation based on the output of the violation control circuit. On the side, a bipolar-unipolar conversion circuit that converts the received signal into a unipolar signal, a violation detection circuit connected to the output of this circuit, a synchronization circuit that synchronizes the envelope signal, and a synchronization circuit that decomposes the envelope signal, The apparatus is characterized in that it includes an envelope decomposition circuit that outputs the state information based on violations of the data bits and frame bits.

[For production]

On the transmitting side, the violation control circuit outputs a control signal that converts the frame bits of the envelope signal into violations in response to the input state information, and based on this control signal, the unipolar/bipolar conversion circuit
For example, when the state information is "on", violation conversion is performed, and when the state information is "off", violation conversion is not performed, and the unipolar signal is converted into a bipolar signal and output as a transmission output.

On the receiving side, the bipolar/unipolar conversion circuit converts the received input from a bipolar signal to a unipolar signal, and the violation detection circuit detects the presence or absence of a violation, thereby controlling the envelope decomposition circuit and outputting data and status information. Decomposes and outputs the output.

That is, in the present invention, the status information is "on", "
"off" is transmitted in accordance with the presence or absence of a violation of a predetermined bit. Therefore, there is no need to specially provide a status bit for status information as in the prior art, and it is possible to increase data transmission efficiency without unnecessarily increasing the transmission speed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure is a timing diagram showing an example of an envelope signal in this embodiment.

In FIG. 1, INI, rN2, and 0UT3 are the data input, status information input, and send message output, respectively, on the transmitting side, and fN3.0UTI and 0UT2 are the receiving input, data output, and status information output, respectively, on the receiving side.

A frame pattern generation circuit 1, an envelope assembly circuit 2, a violation conversion circuit 3 that controls violation conversion of frame bits based on state information,
A unipolar/bipolar conversion circuit 4 converts a unipolar signal into a bipolar signal and also performs violation conversion on the control information of the violation control circuit 3. A bipolar/unipolar conversion circuit 5 converts a bipolar signal into a unipolar signal. It includes a violation detection circuit 6, an envelope synchronization circuit 7, and an envelope decomposition circuit 8.

In FIG. 2, F is a frame bit for envelope identification, which has a pattern according to a certain rule, such as an alternation of logic "1" and "0". D is a data bit.

A feature of the present invention is that the configuration shown in FIG. 1 transmits state information "on" and "off" in correspondence with the presence or absence of violation of frame bits.

Next, the operation of this embodiment will be explained. The presence or absence of a frame bit violation is defined in correspondence with the state information "on" or "off". On the transmitting side, the frame bits generated by the frame pattern generation circuit 1 and the data bits from the data input IN1 are input to the envelope assembly circuit 2 to assemble an envelope signal. On the other hand, the violation control circuit 3 outputs control information for violation conversion of frame bits according to the state of the state information input IN2. The unipolar/bipolar conversion circuit 4 converts the envelope-configured unipolar signal into a bipolar signal, and at the same time performs violation conversion based on the above control information and outputs a transmission output 0UT3. On the receiving side, first, the bipolar/unipolar conversion circuit 5 converts the human Kabaibora signal at the reception input IN3 into a unipolar signal. This output is processed by a violation detection circuit 6 to detect a violation, an envelope synchronization circuit 7 to perform envelope synchronization to identify frame bits and data bits, and an envelope decomposition circuit 8 to perform envelope synchronization to identify frame bits and data bits. The state information is reproduced according to the presence or absence of a violation, and the state information 0UT2 is output.At the same time, the envelope signal is decomposed and the data bits are output as data output 0UTI.

[Effects of the Invention] As described above, the present invention can reduce the transmission speed compared to conventional envelope transmission by transmitting status information without allocating it to status pits. Furthermore, when compared at the same transmission speed, it has the effect of increasing data transmission efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a timing diagram showing an example of an envelope signal according to the present invention. FIG. 3 is a timing diagram showing an example of a conventional envelope signal. DESCRIPTION OF SYMBOLS 1... Frame pattern generation circuit, 2... Envelope assembly circuit, 3... Violation control circuit, 4
... Unipolar/bipolar conversion circuit, 5... Bipolar/unipolar conversion circuit, 6... Violation detection circuit, 7... Envelope synchronization circuit, 8...
Envelope decomposition circuit, D...data bit, F...
・Frame bit, INI...data input, IN2・
...Status information input, IN3...Reception input, 0UTI.
...Data output, 0UT2...Status information output, 0UT
3...Transmission output, S...Status spit.

Claims (1)

[Claims] (1) In the envelope data transmission method of digital data communication, the transmitting side includes a frame pattern generation circuit (1) and an envelope assembly circuit (2) which inputs the output of this frame pattern generation circuit and data bits and assembles an envelope signal. , a violation control circuit (3) that inputs state information and controls violation conversion of frame bits, and a unipolar-bipolar conversion that converts the envelope signal into a bipolar signal and gives a violation by the output of the violation control circuit. circuit (4), on the receiving side, a bipolar-unipolar conversion circuit (5) for converting the received signal into a unipolar signal, a violation detection circuit (6) connected to the output of this circuit, and the envelope signal and an envelope decomposition circuit (8) that decomposes the envelope signal and outputs the state information based on violations of the data bits and frame bits. Transmission method.