JP2000078469A - Switching method for automatic program controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make CM switch timing coincident between transmission and reception stations in spite of conditions especially in the case of CM switching concerning an automatic program controller for a television broadcasting station. SOLUTION: An automatic program controller 2 of a transmission station 1 transmits a video signal to a reception station 6 while superimposing a net queue signal on it before CM switching for a prescribed time and transmits the video signal to the reception station while super imposing timing information on it at the CM switch timing. When the net queue signal superimposed on the video signal is detected, the reception station 6 sends a READY signal for waiting the CM to be switched so as to be sent out for a prescribed time before and after CM switch timing and when the timing information superimposed on the video signal is detected while the READY signal is sent out, a control signal for switching CM is sent out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic program control device in a television broadcasting station, and more particularly, to an automatic program control method in an automatic program control device for preventing an affiliated station (reception station) from being seen at the time of CM replacement.

[0002]

2. Description of the Related Art When a CM is transmitted in a television broadcasting station, the CM is usually replaced between a key station (originating station) and an affiliated station (receiving station). At this time, if the receiving station does not know the CM switching timing at the transmitting station, the CM of the transmitting station flows as it is. Therefore, the net cue signal is superimposed on the video signal three seconds before the CM is transmitted at the transmitting station. The signal is transmitted to the receiving station 6, and the receiving station receives the net cue signal,
3 seconds before M transmission. FIG. 3 shows this conventional system configuration diagram, and FIG. 4 shows a net cue signal transmission form.

[0003] However, at the transmitting station and the receiving station, the time is compared by the clock device in the station and the CM is transmitted by the automatic program transmission control device. However, since the clock device is not synchronized between the transmitting station and the receiving station, the CM is not synchronized. At the time of switching, there is a problem that a so-called flicker phenomenon occurs in which the CM transmitted from the transmitting station is seen for a moment.

[0004] To solve this problem, Japanese Patent Laid-Open No.
In the first issue, when the receiving station receives a net cue signal that is three seconds before the CM switching, a CM replacement control signal is transmitted to the control unit of the automatic program control device after a lapse of several fields shorter than three seconds. Upon receiving the CM replacement control signal, the control unit compares the video signals continuously input by the two-field video signal comparison device, and when it detects that the picture of the video signal has changed abruptly, determines that it is the CM replacement timing. Thus, there is described a technique for preventing the appearance of a flicker when replacing a CM.

[0005]

However, according to the technology described in the above publication, the decision to switch the CM depends on a sudden change in the picture pattern of the video signal. There is a problem that the CM cannot be replaced at the timing.

In view of the above problems, an object of the present invention is to make CM replacement timings of a transmitting station and a receiving station coincide with each other in any situation.

[0007]

According to the present invention, there is provided a transmitting station which is a key station for broadcasting a program.
In a broadcasting system having a receiving station that is an affiliated station that receives a television signal transmitted from a transmitting station and broadcasts a program, the transmitting station compares time information of operation data with current time. An automatic program control device for controlling program transmission, wherein the automatic program control device transmits a net cue signal to the receiving station a predetermined time before CM switching, and transmits switching timing information to the receiving station at the CM switching timing. Transmitting, wherein the receiving station replaces when receiving the net cue signal.
M is made to be ready for transmission, and the CM is replaced at the timing when the timing information is received.

Further, in the present invention, the transmitting station includes a switcher for transmitting a program under the control of the automatic program control device, and a net cue signal and switching timing information from the automatic program control device to a video signal from the switcher. A net cue signal superimposing device for superimposing,
A transmitting device that sends a video signal on which a net cue signal and switching timing information are superimposed to the receiving station, wherein the receiving station receives the video signal sent from the transmitting device, A switcher for transmitting the video signal or a CM to be replaced, a net cue signal detection device for detecting a net cue signal and switching timing information from the video signal and transmitting a cue control signal and a timing pulse signal, and a cue control signal being detected. REA for a predetermined time before and after the CM switching timing
An automatic program control device at a receiving station for transmitting a DY signal; and a standby for enabling the switcher to transmit a CM switching control signal when the READY signal is received, and a CM switching control when a timing pulse is received during the standby state. A switcher controller for sending a signal to the switcher.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment according to the present invention will be described with reference to FIGS. The transmitting station 1 serving as a key station checks the time information of the operation data against the current time and controls an automatic program control device 2 for controlling program transmission.
A video switcher 3 for transmitting a video signal in accordance with a control signal from the automatic program control device 2, a cue control signal for notifying that it is three seconds before the CM switching transmitted from the automatic program control device 2, and a CM switching timing. A net cue signal superimposing device 4 that superimposes switching timing information indicating that there is a video cue signal on the video signal transmitted from the video switcher 3, and a net cue signal transmitted by the video signal or net cue signal superimposing device 4 transmitted from the video switcher 3. And a transmitting device 5 for transmitting the superimposed video signal to a receiving station 6 which is an affiliated station.

A receiving station 6 for receiving a video signal from the transmitting station 1 includes a receiving device 7 for receiving the video signal transmitted from the transmitting station 1 and a network superimposed on the video signal received by the receiving device 7. After detecting the cue signal and the switching timing information, the net cue signal detection device 8 that sends out the cue control signal and the timing pulse signal, and when the cue control signal is received, the clock device (not shown) of the own device counts for 2 seconds. The automatic program controller 9 for continuously transmitting the READY signal for about two seconds, that is, one second for the CM replacement timing, and transmitting the received timing pulse signal to the next stage as it is, and taking the AND of the READY signal and the timing pulse signal CM for video switcher 11
And a switcher controller 10 for transmitting a control signal for replacement.

Next, the operation of the present invention will be described. The automatic program control device 2 of the transmitting station 1, which is a key station, has previously registered operation data of programs and CMs. The operation data is compared with the time information and the current time. 3 to send a control signal. Upon receiving the control signal, the video switcher 3 sends a video signal of a program or CM indicated by the control signal to the transmitting device 5 and transmits it as a television signal to the receiving station 6, which is an affiliated station.

In the receiving station 6, when a television signal is received by the receiving device 7, the video signal is switched by the video switcher 11 and is broadcast to an area covered by the receiving station 6.

Here, a program is currently being broadcast, and CM
Consider switching to. In the automatic program control device 2 in the transmitting station 1, a queue control signal is transmitted three seconds before the CM switching. Automatic program control device 2
Is transmitted to the net cue signal superimposing device 4 and superimposed on the video signal transmitted from the video switcher 3. The video signal on which the net cue signal is superimposed is converted into a television signal by the transmission device 5 and sent to the reception device 7 of the reception station 6.

The television signal received by the receiving device 7 is restored to a video signal, sent to the video switcher 11 to broadcast a program, and the net cue signal detecting device 8 detects a net cue signal.

When the net cue signal detecting device 8 detects the net cue signal, it sends a cue control signal to the automatic program control device 9. RE after counting
Send the ADY signal to the switcher control for about 2 seconds. This is due to the fact that the CM replacement occurs three seconds later. Since the clock devices in the stations are not synchronized between the transmitting station and the receiving station 6, the scheduled replacement time of the CM is sufficiently ensured to ensure the time lag. This is because the CM can be replaced at any time before and after one second.

The switcher controller 10 is a REA
When the DY signal is received, the video switcher 11 enters a standby state so that a control signal for broadcasting a commercial to be replaced can be transmitted at any time.

Thereafter, in the automatic program control device 2 in the transmission station 1, when the CM switching timing comes, the switching timing information is transmitted, and the switching is performed in the net cue signal superimposing device 4 in the same manner as the net cue control signal. After the timing information is superimposed on the video signal, the television signal is transmitted to the receiving device 7 of the receiving station 6 via the transmitting device 5.

When the receiving device 7 converts the received television signal into a video signal, the net cue signal detecting device 8
Detects the switching timing information superimposed on the video signal. When the net cue signal detection device 8 detects the switching timing information, it sends a timing pulse signal to the switcher control via the automatic program control device 9.

At present, the switcher control is on standby so as to be able to transmit a control signal to the video switcher 11, and transmits a CM replacement control signal to the video switcher 11 at the timing when the timing pulse signal is input. The switcher control has an AND circuit, and can be realized by connecting one to a READY signal and the other to a timing pulse.

[0020]

As described above, the video switcher 11 performs CM replacement at the timing of receiving the control signal from the switcher control. However, since this timing is the timing at which the video signal from the transmitting station 1 is switched to CM, the reception is performed. No flickering occurs at the station 6, and the CM can be replaced at the receiving station 6 in the same manner as the CM switching timing at the transmitting station.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an entire broadcasting system according to the present invention.

FIG. 2 is a diagram showing a signal transmission mode at the time of CM replacement according to the present invention.

FIG. 3 is a configuration diagram showing the entire broadcasting system in the related art.

FIG. 4 is a diagram showing a signal transmission form at the time of CM replacement according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission station 2 Automatic program control device 3 Video switcher 4 Net cue signal superposition device 5 Transmission device 6 Receiving station 7 Receiving device 8 Net cue signal detection device 9 Automatic program control device 10 Switcher controller 11 Video switcher

Claims (2)

[Claims] An originating station, which is a key station for broadcasting a program,
In a broadcasting system having a receiving station that is an affiliated station that receives a television signal transmitted from a transmitting station and broadcasts a program, the transmitting station checks time information of operation data against current time. An automatic program control device for controlling program transmission, wherein the automatic program control device transmits a net cue signal to the receiving station a predetermined time before the CM switching,
The receiving station transmits switching timing information to the receiving station at a CM switching timing, wherein the receiving station waits for transmission of a CM to be replaced upon receiving the net queue signal, and replaces a CM at a timing at which the timing information is received. A replacement method in an automatic program control device, characterized in that: 2. A switcher for transmitting a program under the control of the automatic program controller, and a network for superimposing a net cue signal and switching timing information from the automatic program controller on a video signal from the switcher. A cue signal superimposing device, and a transmitting device that transmits a video signal on which a net cue signal and switching timing information are superimposed to the receiving station, wherein the receiving station transmits the video signal transmitted from the transmitting device. A receiving device for receiving, a switcher for transmitting the video signal or the CM to be replaced, a net cue signal detecting device for detecting a net cue signal and switching timing information from the video signal and transmitting a cue control signal and a timing pulse signal; Before the CM switching timing when the cue control signal is detected. A predetermined period of time READY
An automatic program control device in a receiving station that sends out a signal;
And a switcher controller for transmitting a CM switching control signal to the switcher when the timing pulse is received during the standby state while transmitting a switching control signal. .