JPH03113927A - Digital signal repeater - Google Patents

Abstract

PURPOSE:To move a low level signal between high level signals over circuit sections by linking the switching circuits of low level signals over plural circuits in a low level signal extracting and inserting means of a device multiplexing and relaying the low level signal. CONSTITUTION:A switching circuit G (H, I) is provided in common on a demultiplex circuit A (B, C) and a multiplex circuit D (E, F), a low level signal demultiplexed by one of the demultiplex circuits A, B, C is given to a low level signal external device J or a desired multiplex circuit and low level signals of the number equal to the number of the low level signals given to the external device J are given to desired multiplex circuits. High definition digital signals 1, 2, 3 are demultiplexed into low level signals 7, 8, 9 respectively by the demultiplex circuits A, B, C. The switching circuits G, H, I apply the transmission of the low level signals to the low level signal external device J and the insertion of the signal to the low level signal external device J. Furthermore, the switching circuits G, H, I replace the low level signals simultaneously. The replaced low level signals 10, 11, 12 are multiplexed with high level digital signals, 4, 5, 6 respectively by the multiplex circuits D, E, F and transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to a relay device that relays and transmits multiplexed signals generated by synchronously multiplexing low-level signals. In particular, it relates to means for transmitting low-level signals to the outside, inserting them from the outside, and exchanging them.

〔overview〕

The present invention provides low-level signal extraction and insertion means for a device that multiplexes and relays low-level signals, by connecting low-level signal switching circuits across a plurality of circuits, thereby preventing the movement of low-level signals between high-level signals. This allows the process to be performed across circuit categories.

[Conventional technology]

Conventionally, this type of digital signal relay device has a means for separating a synchronously multiplexed high-order digital signal into a plurality of low-order digital signals, and sending a portion of the low-order digital signals to the outside and inserting a portion of the low-order digital signals from the outside. Ta.

[Problem that the invention seeks to solve]

Such a conventional example has a drawback that when a plurality of multiplexed high-level signals exist, a low-level signal cannot be moved between the high-level signals.

SUMMARY OF THE INVENTION The present invention aims to eliminate such drawbacks, and aims to provide a digital signal repeater having switching means that can move low-level signals between high-level signals.

[Means for solving problems]

The present invention includes a plurality of separation circuits that separate one high-order signal into a plurality of low-order signals, and a plurality of low-order signals provided corresponding to the separation circuits, the number of which is equal to the number of low-order signals separated by the separation circuit. In the digital signal relay device, the switching circuit includes a multiplexing circuit that multiplexes the signals to generate one high-level signal, and a switching circuit inserted in a path between the separation circuit and the multiplexing circuit, the switching circuit comprising: One circuit is commonly provided corresponding to the plurality of separation circuits and the plurality of multiplexing circuits, and the low-level signal separated by one of the separation circuits is applied to a desired multiplexing circuit or an external device, and is also applied to the external device. The present invention is characterized in that it is configured to provide a desired multiplex circuit with the same number of low-order signals as the low-order signals received.

[Effect]

The separated low level signals are provided to external devices and to desired multiplex circuits via switching circuits. Furthermore, a low level signal from an external device is also given to a desired multiplex circuit via the switching circuit. At this time, the low-level signal can be moved to a multiplex circuit other than the multiplex circuit that the separation circuit faces.

〔Example〕

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

FIG. 1 is a block diagram of this embodiment.

As shown in FIG. 1, this embodiment is a separation circuit A that separates one high-level signal into a plurality of low-level signals.

B, C, and the separation circuits A, B, and C are provided correspondingly, and the same number of low-order signals as the low-order signals separated by the separation circuits A, B, and C are multiplexed to produce one high-order signal. The generated multiplex circuits E, F, and separation circuits A, B,
The switching circuits G, H, and I are inserted in the path between C and the multiplex circuits E and F. circuit A,
One common circuit is provided corresponding to E and F, and the low level signal separated by one of the separation circuits A, B and C is multiplexed to the desired one of E and F. A low-level signal is given to an external device J, which is a multiplex circuit or an external device, and a number of low-level signals equal to the low-level signals given to this external device are given to a desired multiplex circuit among E and F. .

Next, the operation of this embodiment will be explained.

High-order digital signals 1.2 and 3 are separated into low-order signals 7.8 and 9 by separation circuits A, B and C, respectively. These low-level signals are sent to the low-level signal external device J and inserted from the low-level signal external device J by switching circuits G, H, and I. Furthermore, switching circuits G, H, and I also perform switching of low-level signals at the same time. These switched low level signals 1o, 11 and 12 are multiplexed into high level digital signals 4.5 and 6 by multiplex circuits DSE and F, respectively, and transmitted.

〔Effect of the invention〕

As explained above, the present invention enables the movement of low-level signals between high-level signals and the sending and insertion of low-level signals to the outside by connecting switching circuits for low-level digital signals. It has the effect of improving efficiency.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block configuration diagram showing the configuration of a conventional example. A, B, C5KSL...separation circuit, D, E, F. M, N...Multiple circuit, G, H, I, O, P...Switching circuit, J...Low level signal external device.

Claims (1)

[Claims] 1. A plurality of separation circuits that separate one high-order signal into a plurality of low-order signals, and a signal that is provided corresponding to the separation circuit and is equal to the low-order signal separated by the separation circuit. A digital signal relay device comprising: a multiplexing circuit that multiplexes a number of low-level signals to generate one high-level signal; and a switching circuit inserted in a path between the separating circuit and the multiplexing circuit, One circuit is commonly provided corresponding to the plurality of separation circuits and the plurality of multiplexing circuits, and provides a low-level signal separated by one of the separation circuits to a desired multiplexing circuit or an external device. A digital signal relay device characterized in that it is configured to provide a desired multiplex circuit with the same number of low-order signals as the low-order signals given to the external device.