JPH0470023A - Program transmitting device - Google Patents

Abstract

PURPOSE:To prevent broadcasting accidents even with the faults of equipments by connecting selectively the program reproduction/ transmission equipments to a channel line of a channel bus. CONSTITUTION:A channel bus 14 is connected to e multi-port memory 15 of large capacity which can store many programs. Then the memory 15 can write the program data inputted by a write controller 16 into an optional area. Furthermore the memory 15 can read in real time the program data out of a read controller 17 through an optional area and then send out these data. A control computer 12 can identify an idle area with detection of a reed end state and also a readable area with detection a write end state respectively. Then the computer 12 can reproduce and transmit successively the designated programs to store them in the idle areas of the memory 15 synchronously with a time clock and at the same time can read out in real time the designated programs at each designated time. Thus the programs are once stored in the memory 15 and therefore can be reproduced. As a result, the broadcasting accidents are not directly caused by the faults of equipments.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a program transmitting device used for, for example, television broadcasting, radio broadcasting, data broadcasting, and the like.

(Prior art) Traditionally, broadcasting stations have prepared the necessary number of devices for reproducing and transmitting program programs, and using a program program transmitter to start each reproducing and transmitting device at the same time as the broadcast time. The output is controlled by a switcher.

However, in the conventional program transmission device as described above, since the control of the playback/transmission equipment performs real-time processing at the transmission time, equipment failure (if it does not start,
In many cases, this can directly lead to a broadcasting accident, etc.) or a broadcasting accident. Furthermore, it is necessary to keep the reproduction/transmission equipment in a standby state according to the transmission schedule, which is extremely inefficient. Furthermore, because it is a real-time playout, it is necessary to prepare a large number of high-performance playback and playout devices and to be able to execute playback and playout control processing reliably and with high precision.In particular, time information is required for playback and playout control. It is also necessary to adopt a high-performance real-time control computer as a standard, making the control system large-scale.

(Problem to be solved by the invention) As mentioned above, in the conventional program transmitting device,
Because real-time processing is performed, the cause of broadcasting accidents,
This leads to higher performance of reproduction/transmission equipment, lower usage efficiency, and increased scale of the control system, which is unfavorable from an efficient and economical standpoint.

This invention was made to solve the above-mentioned problems, and even if real-time transmission is performed, real-time control of program playback and transmission equipment is not required, and broadcasting accidents can be prevented even if equipment failure occurs. It is an object of the present invention to provide a program transmitting device that can improve usage efficiency and simplify the control system.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, a program transmitting device according to the present invention includes a group of reproduction/transmission devices for reproducing and transmitting various program programs, and a group of reproduction/transmission devices for reproducing and transmitting various program programs. A channel bus having a plurality of channel lines to be transmitted; a switcher that selects any playback/sending device from the group of playback/sending devices and connects it to any channel line of the channel bus; a memory that stores a program program; a write control device that generates a write address for writing the program program into the memory in synchronization with a time clock;
A readout control device generates a readout address for reading a program written from the memory in synchronization with a time clock, and starts readout at a designated time.

(Function) In the program transmitting device having the above configuration, the program program reproducing/transmitting unit is selectively connected to the channel line of the channel bus, the program program is reproduced at an arbitrary time, and the program program is synchronized with the time clock in the memory. By writing the data in advance and reading it out at a specified time in synchronization with the time clock, and temporarily storing it in memory, it does not require high control accuracy of the playback/transmission equipment, and it is possible to start over even if there is a equipment failure. ing. In addition, the program is transmitted by reading out the memory, so that real-time transmission can be performed with high precision.
The readout control is synchronized with the time clock to enable real-time transmission based on time information.

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

FIG. 1 shows its configuration. Reference numeral 11 indicates a group of devices for reproducing and transmitting program programs, such as a VTR (video tape recorder) 111 and a film reproducing device 112.
Consists of etc. These playback/transmission 8 devices 111, 1
12, . . . can be started and terminated as appropriate by control commands from the control computer 12, and their output ends are connected to the channel input ends of the switcher I3, respectively. The switcher 13 connects an arbitrary channel input end to an arbitrary line of a channel bus 14 having lines of a plurality of channels (three channels in this case) in accordance with a control command from the control computer 12.

The above channel bus 14 is a large capacity multi-port memory 1
5. This memory 15 is capable of storing a large number of program programs, and the write control device 16 can write program program data manually into any area, and the read control device 17 can write the program program data stored therein. , and can be read and transmitted in real time from any area of interest. Further, this memory 15 can be accessed multiple times, and multiple pieces of data can be written at the same time. The write control device 16 inputs the time/synchronization clock signal, and
A write address synchronized with the time clock is generated and sent to the memory 15. Further, the readout control device 17 inputs a time/synchronous clock signal,
A read address synchronized with the time clock is generated and sent to the memory 15 so that the program data specified by the control command from the control computer 12 is read at the time specified.

It is assumed that time data such as the required time of programs that can be reproduced and transmitted is registered in advance in the control computer 12.

In the above configuration, the operation means will be explained below.

The control computer 12 records the usage status of the playback/transmission device group 11, the channel connection status of the switcher 12, and the memo January 5.
When the program programs to be sent out and their sending times are sequentially set in the control computer 12, they are temporarily stored and sent to the switcher 13 to select three channels and play/send equipment. Send commands. Upon receiving the command, the switcher 13 connects the designated playback/transmission device to the empty channel line of the channel bus 14, and notifies the control computer 12 of the termination of the connection.

When the control computer 12 detects the end of the connection, it sends a playback/transmission command to the designated playback/sendout device, and at the same time sends a start command to the write control device 16.

The three playback/transmission devices that received the command start playing/transmission of the program, and the write control device 16 writes the program to the memory 15.
The programs are written in the empty area of the program, and the control computer 12 is notified of the completion of each execution. On the other hand, the control computer 12 provides the readout control device 17 with the program to be sent out and sending time information. The readout control device 17 automatically reads out the designated program from the memory 15 at the designated transmission time, transmits it sequentially, and notifies the control computer 12 of the end of execution.

Therefore, in the program transmission device having the above configuration,
The control computer 12 can identify empty areas by detecting the end of reading, and can identify readable areas by detecting the end of writing. Therefore, the designated program programs can be reproduced and transmitted one after another and stored in the empty area of the memory 15, and at the same time, the designated program programs can be read and output in real time at a designated time.

In this case, since the information is temporarily stored in the memory 15, the control precision of the playback/transmission equipment is not required to be very precise, and even if there is a failure in the equipment, it is possible to start over again, so it will not directly lead to a broadcasting accident. In addition, since the program is sent out by reading out the memory, real-time playout can be performed with high precision.Furthermore, by simply adjusting the readout control to the time clock, real-time playout based on time information can be performed. Therefore, it becomes unnecessary to employ a high-performance real-time control computer, and the scale of the control system can be reduced, which is economically advantageous.

[Effects of the Invention] As described above, according to the present invention, even if real-time transmission is performed, real-time control of program playback/sending equipment is not required, and broadcasting accidents can be prevented even if equipment failure occurs. Moreover, it is possible to provide a program transmitting device that can improve usage efficiency and simplify the control system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a program transmitting device according to the present invention. Ill-2 program playback/transmission equipment group,
...VTR1112...Film playback device, 12...
・Control computer, 13...Switcher, 14...
- Channel bus, 15... Large capacity multi-board memory, 16... Write control device, 17... Read control device. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A group of playback/transmission devices that play back and send out various program programs, a channel bus having a plurality of channel lines each transmitting program programs, and a channel bus by selecting an arbitrary playback/transmission device from the group of playback/sending devices. a switcher connected to any channel line of the channel bus, a memory that stores the program program sent through the channel bus, and a write control that generates a write address for writing the program program to this memory in synchronization with a time clock. and a readout control device that generates a readout address for reading out the program program written from the memory in synchronization with a time clock and starts reading out at a specified time.