JPS6384212A - Road-side communication equipment - Google Patents

Abstract

PURPOSE:To change the content of broadcast without intermission of the broadcast by applying control of storage of a broadcast text into a broadcast text memory, read and D/A conversion in time division. CONSTITUTION:A broadcast text forming section 2 edits voice data stored in a voice data memory 1 to form a broadcast text. A communication control section 11 receives a broadcast text data from a broadcast text forming section 2, writes it in a broadcast text memory 12 and stores it, the data is converted into an analog signal by a DA conversion section 5 and it is broadcast by a transmitter 6 through a transmission antenna 7. In this case, the communication control section 11 fetches a broadcast data from the broadcast text forming section 2, writes and stores it in the broadcast text memory 12 and applies it to the DA conversion section 5 in time division. Thus, the processing is divided into the data reception and DA conversion, the broadcast text memory 12 is written while broadcasting and the content of broadcast is revised easily without intermitting the broadcast.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a roadside communication device for providing road information to vehicles passing on major roads and the like.

(Prior Art) Conventionally, for example, inside tunnels on major roads, it has been used to notify people of the occurrence of emergency accidents, etc. inside the tunnel.

A guidance service with other traffic-related information is also provided. In addition, traffic information guidance is provided on roads with extremely heavy traffic congestion at major meetings and other events.

Or about to take place.

Generally, the method is to place 'a!' on the roadside! This is a medium-wave broadcast from a transmitting antenna, which is then received by a car radio installed in the vehicle.

FIG. 4 shows the configuration of a roadside communication device that provides such a conventional road information service.

Reference numeral 1 denotes an audio data memory, in which audio data for each word used in broadcasting is accumulated and stored, and the broadcast sentence creation unit 2
The audio data is edited to create a broadcast text. 3 is a communication control unit that receives broadcast text data from the broadcast text creation unit 2 and writes and stores it in the broadcast text memory 4. The stored broadcast text data is converted into an analog signal by a DA (digital-to-analog) converter 5, applied to a transmitter 6, subjected to necessary modulation, amplification, etc., and then sent from a transmitting antenna 7 to an analog signal.
The direction will be broadcast to passing vehicles. Note that the DA converter 5 does not change the data of the broadcast text in the broadcast text memory 4 unless the data of the broadcast text is changed.
Continue A conversion operation. In addition, in general, the above-mentioned broadcast text creation section 2
is not located at the point where the broadcast is to be made, and therefore the broadcast text is transmitted to the communication control unit 3 by suitable digital transmission means, for example via an interface bus as shown. Although the figure shows the communication control configuration of two broadcasting points, a and b, the number of systems is not limited to two, and there may be any number of systems for broadcasting over a wide area, and of course, there may be one system.

In such a roadside communication device, if the content of a broadcast message is to be changed, the broadcast message creation unit 2 must do so.

Broadcast text data with the changed contents is created and sent to the 1 communication control unit 3. At that time, if another broadcast text is already being broadcast, the DA conversion unit 5 converts the data of the broadcast text currently being broadcast. It is being converted to analog and cannot be used for other broadcast texts, in other words, new broadcast part data that is to be changed.In other words, the communication control unit 3 cannot immediately receive the data of the above broadcast text, This means that you will have to wait until the current broadcast ends.

Therefore, the switching of the broadcast text may not be executed immediately, and the broadcast may be interrupted in order to switch to the new broadcast text. The interruption time is 1. For example, if the data transfer rate is set to 80 by 8 seconds, and the broadcast text data is AD converted at a bit rate of 64 bits/second and 60 seconds worth of broadcast data is 480 bytes, it will be 8 seconds. .

FIG. 5 shows the configuration of another conventional roadside communication device.

Reference numerals 1, 2, 6 and 7 are the same as the same reference numerals in FIG. The broadcast text data is stored in an unused broadcast text memory among the memories 9 and 9'. Reference numeral 10 denotes a DA converter which converts the stored data of the most recently stored broadcast text memories 9 and 9 into DA by the communication control unit 8, and sends it from the transmitting antenna 7 via the transmitter 6 through the necessary processing. Let it be sent.

That is, in this case, it is possible to change the broadcast text and broadcast it without interrupting the broadcast.

(Problem to be Solved by the Invention) As described above, it is possible to change the broadcast text even in conventional roadside communication equipment, but in order to avoid interrupting the broadcast, it is necessary to have two broadcast text memories. There was a drawback that it would be uneconomical to install it.

An object of the present invention is to solve the above-mentioned problems and provide a roadside communication device that can relatively easily change broadcast texts.

(Means for Solving the Problems) The present invention achieves the above object by editing audio data in an audio data memory to create a broadcast sentence, transmitting it to one or more broadcast points, and storing it in a broadcast sentence memory. In a roadside communication device that has the function of storing the broadcast text and wirelessly broadcasting it using a digital-to-analog converter audio, the storage of the broadcast text in the broadcast text memory and the control for reading out and digital-to-analog conversion of the broadcast text are carried out in one time division. This is achieved by configuring the

(Function) According to the present invention, there is an advantage that broadcast text can be easily changed without interruption, and emergency information, especially sudden traffic disturbances due to vehicle accidents, etc. can be disseminated, and it can be used for roads where congestion is expected. It is expected that the system will be effective in preventing large traffic jams by providing detour information and avoiding cumulative accidents in tunnels, etc.

(Example) EMBODIMENT OF THE INVENTION Below, one invention will be explained by using an example and drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
Reference numerals 1, 2, 5, 6, and 7 refer to the explanations in FIGS. 4 and 5, and the other reference numeral 11 is a communication control unit that receives broadcast text data from the broadcast text creation unit 2 and creates a broadcast text. memory 12
At the same time, the data is applied to the DA converter 5 to be converted into an analog signal, and the subsequent operation is the same as the conventional one, for example, as explained in FIG. 4, to perform broadcasting.

At this time, the operation in which the communication control unit 11 takes in broadcast text data from the broadcast text creation unit 2, writes and stores it in the broadcast text memory 12, and applies and outputs the data to the DA converter 5 is shown in FIG. 4 or 5. Unlike the conventional operation shown in , the present invention is characterized in that it is performed in a time-sharing manner.

FIG. 2 is a timing chart showing the timing of time-division operation control of the communication control section 11 for data reception and DA conversion, taking the case of 8 KHz sampling as an example. In this way, the communication control unit 11 receives digital data from the broadcast text creation unit 2 at intervals of 1254 (Figure a).
, Meanwhile, the DA converter 5 operates within the reception interval time and sends out the DA converted output as shown in the figure (Figure b).

That is, by doing this, 125. the interval,
By dividing into data reception and DA conversion, the writing in the broadcast text memory 12 can be converted while broadcasting.

In this case, the broadcast content must be switched after the transmission of the broadcast text data is finished, but for this reason, the communication control unit 11 is configured to write to the memory area of the memory address of the broadcast text data that has finished being broadcast. controlled by.

Fig. 3 is a broadcast message memory map showing the pattern, in which (a) the broadcast of broadcast message A is started, and during the broadcast of broadcast message A, broadcast message B is stored in the broadcast end area of broadcast message A ((a)). death)
, the broadcast of broadcast statement B is started after the broadcast of broadcast statement A ends (・C).

In this way, in the present invention, since the communication control unit 11 writes and reads the broadcast text memory in a time-sharing manner, even with only one broadcast text memory 12, it is possible to easily change the broadcast content without interrupting the broadcast. It can be carried out.

(Effects of the Invention) As is clear from the above description, according to the present invention, writing and reading of broadcast text memory is performed by time-sharing control of the communication control unit, so that broadcast contents can be changed without interrupting the broadcast. Since this is possible with a simple device configuration having only one broadcast message memory, as in the past, great effects can be obtained by implementing it in a roadside communication device that broadcasts road information and other guidance to vehicle drivers.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a timing chart of the operation, FIG. 3 is a diagram for explaining the operation of the broadcast text memory which is the main component of the present invention, FIG. 4 is a block diagram showing a conventional roadside communication device, and FIG.
The figure is a block diagram showing another conventional roadside communication device. 1...Audio data memory, 2...Broadcast text creation unit, 3...Communication control unit, 4...Broadcast text memory, 5
... DA conversion section, 6 ... Transmitter, 7 ... Transmission antenna, 8 ... Communication control section, 9,9' ・
...Broadcast text memory, 10...DA converter, 11...
Communication control unit, 12...Broadcast text memory. Patent applicant: Matsushita Electric Industrial Co., Ltd. (Figure 2 1'o J)

Claims (1)

[Claims] A roadside device that has the function of editing the audio data in the audio data memory to create a broadcast text, transmitting this to one or more broadcasting points, storing it in the broadcast text memory, and broadcasting it in audio after digital-to-analog conversion. In communication equipment,
A roadside communication device characterized in that the storage of the broadcast text in the broadcast text memory and the readout and digital-to-analog conversion control of the broadcast text are performed in a time-sharing manner.