JPH03102931A - Consecutive zero suppression coding system - Google Patents

Abstract

PURPOSE:To increase the entire transmission capacity and to improve the performance of a transmitter by adopting the constitution such that an information signal is transmission simultaneously while consecutive zero is suppressed with a consecutive zero suppression code. CONSTITUTION:When, e.g. a transmission data S1 synchronizing with a clock S1 is inputted to a BnZS code conversion section 1, the conversion section 1 replaces 8 consecutive zero data '0s' into a B8ZS code as 'VB0B00' using bipolar violation when the 8 consecutive data exist in the transmission data S2 and outputs a B8ZS signal S3 while suppressing the consecutive zero data. Then an information signal to be transmitted and generated an information signal generating section 4 is inserted by an information signal insertion section 5. In waveform diagram, the information of '1' is inserted, the insertion section 5 inserts the information signal to a final bit in the B8ZS code of the B8ZS signal S3 from the conversion section 1 as a bipolar violation pulse V to obtain a signal S4 and the signal S4 is transmitted from a line 3 to reception side.

Description

[Detailed Description of the Invention] [Summary] A zero-run suppression code particularly suitable for use in supporting lines between transmission devices such as multimedia multiplexers, regarding a coding method that suppresses zero-runs using a BnZS code. Regarding the transmission method, the aim is to increase the overall transmission capacity by suppressing zero sequences and simultaneously transmitting information using a zero sequence suppression code. When several zero data continues, it is converted into a zero-sequence suppression code using bipolar violations and transmitted, and on the receiving side, the zero-series suppression code is returned to the original zero data based on the bipolar violation in the zero-series suppression code. system, the information signal is inserted into the zero-run suppression code and transmitted.

[Industrial Application Field] The present invention relates to a coding method for suppressing zero-runs using a BnZS code, and in particular to a zero-run suppression code suitable for use in supporting lines between transmission devices such as multimedia multiplexers. Regarding the conversion method.

In recent years, with the advancement of the information society, transmission equipment has
The amount of information to be transmitted is also increasing dramatically. Therefore, there is a need for technology that can transmit as much information as possible. [Prior Art] FIG. 4 is a block diagram showing a transmission system to which a conventional zero-run suppression coding method is applied. In FIG. 4, 1 is a BnZS ( The code converter converts the transmission data into a signal based on the BnZS system. 2 is a BnZS code reproducing unit provided on the receiving side of the transmission system and connected to the BnZS code conversion unit 1 via a line 3;
It reproduces the BnZS from the code converter into the original string of zeros and outputs the reproduced signal. Here, in conventional transmission systems, transmission using the BnZS method is
This is done for the purpose of suppressing the zero cycle on 3. The BSZS method will be explained as an example. AMI code (same as bipolar code encoded according to the bipolar rule)
In the transmission line, it is necessary to readjust the timing in order to reproduce the waveform during relay. In order to extract this timing signal, it is necessary that zeros do not continue for a long time.

Therefore, in the BBZS method, when there are eight consecutive zero data '0' in the bipolar data (transmission data) transmitted on the line 3, the BnZS code converter 1 converts them into '0' using bipolar violation.
By replacing it with the zero-run suppression code VBOVBOOO' (see Figure 2), the series of (O t) is suppressed and transmitted. In the zero-run suppression code, B follows the rule that the positive and negative signs alternate. The bipolar side pulse ■ is a bipolar violation pulse when the same code continues. On the other hand, the BnZS code reproducing unit 2 on the receiving side finds a bipolar violation in the bipolar data received through the line 3 and detects it. The original zero data is reproduced by matching it with the matching pattern. [Problem to be solved by the invention] Therefore, the conventional zero-run suppression coding method suppresses the zero-run suppression on line 3 during data transmission. It was used only for that purpose.

On the other hand, as the amount of information has increased in recent years, it has been desired to be able to transmit as much information as possible.

The present invention was made in view of the above circumstances, and provides a zero-run suppression code that suppresses zero-runs and simultaneously enables information transmission, thereby increasing the overall transmission capacity. The purpose is to provide a method for

[Means for solving the problem] Figure 1 is a block diagram of the principle of the present invention. In FIG. 1, 1 converts transmission data S2 into a signal S3 using the BnZS method.
3 is a line, 4 is an information signal generator that generates an information signal to be transmitted, and 5 is a BnZS (zero consecutive suppression) code converter that converts the information signal from the information signal generator 4 into a BnZS code converter.
An information signal insertion section 6 multiplexes and inserts the signal into the BnZS code from the nZS code conversion section 1 and outputs the signal S4. a bipolar violation detection unit that detects a bipolar violation pulse and outputs detection information S5; 7 is a BnZS code regeneration unit;
The reproducing unit 7 compares the signal S4 from the line 3 with the matching pattern S6 and converts the BnZS code to the original zero string (
At the same time, the information signal from the information generating section 4 from the BnZS code is output as the header reproduction information signal S8.

Note that the BnZS code converter 1, the information signal generator 4, and the information signal inserter 5 are provided on the transmitting side of the transmission device, and the bipolar violation detector 6 and the BnZS code regenerator 7 are provided on the receiving side of the transmission device. ing.

[Operation] In the system of the present invention having the above-described structure, signal conversion as shown in FIG. 2 is performed. Note that here, the case of B8ZS will be explained.

In other words, as shown in FIG. 2, for example, a certain clock S
1 is input to the BnZS code converter 1. If there are eight consecutive zero data 1 0 1 in the send data S2, this converter 1 converts it into a bipolar code. 'V using violation
Replaced with the B8ZS code BOVBOOO',
It is output as a B8ZS signal S3 while suppressing continuous zero data.

Next, the information signal to be transmitted generated by the information signal generator 4 is inserted by the information signal inserter 5.

In FIG. 2, information '1' is inserted.

The insertion unit 5 inserts the information signal as a bibolar violation pulse V into the last bit of the B8ZS code of the B8ZS signal S3 from the conversion unit 1 to obtain a signal S4, and transmits this signal S4 from the line 3 to the receiving side. is being transmitted to.

On the other hand, on the receiving side, the bipolar violation detection unit 6 detects the bipolar violation pulse V from the signal S4 from the transmitting side, and detects the bipolar violation pulse V from the signal S4 from the transmitting side. A violation detection signal S5 is output.

In addition, the BnZS code reproducing unit 7 converts the signal S4 from the transmitting side and a preset 7-bit matching pattern (
VBOVBOO) Comparing with S6, the compatible parts are:
The reproduced signal S7 is regenerated into eight zero data, which is the original signal.
It is output as . At the same time, the BnZS code reproducing unit 7 refers to the 8th bit of the signal string that matches the matching pattern S6, and if it is '0', it is 'O', and if it is bibolar violation pulse V, it is '1'. is output as a reproduction information signal S8.

In this way, the B8ZS code allows the transmission of information signals from the transmitter to the receiver without compromising the original purpose of zero-run suppression.

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

FIG. 3 is a block diagram showing one embodiment of the present invention. In the figure, the same reference numerals as those already described indicate the same parts.
This embodiment is constructed almost the same as that shown in FIG.

This embodiment shows a case in which the method of the present invention is applied to a system that monitors each other's runaway when, for example, a multimedia multiplexing device has a CPU on each printed board and communicates with each other. There is. Specifically, as shown in FIG.
cessor unit) 8, the runaway monitoring unit 4
A is used to monitor the vehicle and, if a runaway occurs, transmit an information signal regarding the runaway.

Therefore, in this embodiment, the runaway monitoring section 4A has the same function as the information signal generation section 4 in FIG. The system is designed to send the information signal to the information signal insertion section 5 as an information signal.

The system of this embodiment shown in FIG. 3 also operates by performing signal conversion similar to that shown in the timing chart of FIG. In other words, the normal transmission data S2 is BnZS(
(A case of B8ZS will also be explained here) When the code is input to the code converter 1, this converter 1 converts the transmission data S2
If there are eight consecutive zero data I O I , this is replaced with a B8ZS code using bipolar violation, and outputted as a B8ZS signal S3 while suppressing consecutive zero data.

Next, the information signal from the runaway monitoring section 4A is inserted by the information signal insertion section 5. This information signal becomes 'O' when the MPU 8 is normal, and becomes 11' when the MPU 8 goes out of control. Then, the inserting section 5 inserts the information signal as a bibolar violation pulse V into the last bit of the B8ZS code of the B8ZS signal S3 from the converting section 1 to obtain a signal S4. Transmitting to the receiving side.

On the other hand, on the receiving side, the bipolar violation detection section 6 outputs a bipolar violation detection signal S5 in which only the bit in which bipolar violation has occurred in the signal S4 from the transmitting side is 111. Also. B
In the nZS code reproducing section 7, the signals S4 and 7 from the transmitting side are
The bit matching pattern S6 is compared, and the matching part is reproduced into eight zero data, which is the original signal, and the reproduced signal S
It is output as 7. At the same time, the BnZS code reproducing unit 7 refers to the 8th bit of the signal string that matches the matching pattern S6, and reads 'O' if it is 'O', and l 1 1 if it is the bipolar violation pulse V. It is output as a reproduction information signal S8.

In other words, when the reproduction information signal S8 is "1", the receiving side recognizes that the MPU 8 on the transmitting side runs out of control.

Conventionally, the means for runaway monitoring between transmission devices having MPUs is that the MPU of one transmission device can control the MPU of the other transmission device.
This was a passive method that recognized that the MPU of the other transmission device had gone out of control when communicating with a PU and no longer showed a normal response. By applying this, even if communication between MPUs is not performed all the time. When a runaway occurs in the MPU, the MPU runaway information is immediately transmitted to another transmission device by an information signal.

As described above, according to the present embodiment, the BnZS code can be used without impairing the original purpose of suppressing zero-sequence, and
Information signals, that is, information regarding the runaway of the MPU 8, can be transmitted from the transmitting side to the receiving side without damaging the content of conventional transmission data, and the transmission capacity can be increased.

In addition, although the example mentioned above demonstrated the case of B8ZS, this invention is not limited to this.

[Effects of the Invention] As described in detail above, according to the zero-run suppression coding method of the present invention, the zero-run suppression code is configured so that an information signal can be simultaneously transmitted while suppressing zero-runs. This makes it possible to transmit even more information without compromising the content of conventional transmission data, increasing the overall transmission capacity and contributing to improved performance of the transmission device.

6 is a bipolar violation detection section, 7 is BnZS
code reproducing section; 8 is an MPU;

Claims (1)

[Claims] Regarding bipolar data transmitted on line (3),
When the required number of zero data continues, it is converted into a zero-sequence suppression code using bipolar violations and transmitted, and on the receiving side, the zero-series suppression is restored to the original zero data based on the bipolar violation in the zero-series suppression code. A zero-run suppression coding method characterized in that an information signal is inserted into the zero-run suppression code and transmitted.