JPH099146A - Television net queue control system - Google Patents

Abstract

PURPOSE: To provide the television net queue control system avoiding the reception of an undesired video signal from a Q signal transmission station at a program video signal reception station. CONSTITUTION: In an automatic program controller 1 of a transmission station sending a program video signal, a determined time operation discrimination section 5 discriminates whether the mode is a determined time operation or an untimely operation. When the determined time operation discrimination section 5 discriminates the determined time operation mode in which a program changeover time has already been confirmed, a Q signal superimposition request section 7 requests the transmission of the Q signal in a prescribed timing before the changeover determined time via a delay circuit 4, the display circuit 4 delays the Q signal by a time enabling simultaneous changeover of a program between the transmission station and the opposite station and provides an output of a received transmission request to the Q signal transmitter 2. Upon the receipt of the transmission request from the automatic program controller 1 and the delay circuit 4, the Q signal transmitter 2 transmits a Q signal superimposed on the video signal based on the transmission request.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television net queue control system for controlling transmission program switching by a net queue signal (hereinafter referred to as a Q signal) superimposed on a specific horizontal scanning period of a television video signal, and more particularly, to a television net queue control system. The present invention relates to a television net queue control system capable of avoiding unnecessary input of a video signal when switching programs, at a program video signal receiving station.

[0002]

2. Description of the Related Art Conventionally, in a television net queue control system of this type, a program video signal transmission station has an automatic program control device 91 and a Q signal transmission device 9 as shown in FIG.
2 and a Q signal receiving device 93, and the automatic program control device 91 has a clock 94, a Q signal superimposition requesting unit 95, and a program switching unit 96.

In the automatic program control device 91, the Q signal superimposition request unit 95 sends a Q signal superposition request to the Q signal sending device 92 at a predetermined time of the program. The Q signal transmission device 92
In response to the signal superimposing request, the Q signal is superposed and transmitted in the horizontal scanning period in which the vertical blanking period of the video signal of the transmitted program is determined. The Q control signal of the Q signals controls program switching. The Q signal transmitting device 92 transmits the video signal on which the Q signal is superimposed to the Q signal receiving device 93 of each of the destination station and the local station.

The Q signal receiving device 93 receives the Q signal together with the video signal.
A signal is received, a Q control signal is extracted from this Q signal, and is sent to the program switching unit 96 of the automatic program control device 91.
Based on the received Q control signal, the program switching unit 96 switches the video signal of the received program to the next program at the transmitting station, while switching to the video signal of its own program at the receiving station.

Next, the switching operation will be described in more detail with reference to FIG. 4 and FIG.

Here, as shown in FIG. 5, in the Q signal transmitting station, the automatic program control device 91 and the Q signal transmitting device 92 are used.
And a Q signal receiving device 93 are provided, while the receiving station is provided with an automatic program control device 81 and a Q signal receiving device 83.

The automatic program control device 91, in the state of switching the video signal of the program being transmitted, outputs the Q signal transmission device 92.
The Q signal is superimposed during a predetermined period of the video signal being sent to the Q signal receiving devices 93 and 83 via. Q signal receiving device 9
Reference numerals 3 and 83 extract the Q control signal from the received Q signal and send it to the automatic program control devices 91 and 81. The automatic program control devices 91 and 81 have a predetermined time, for example, 3 seconds in the example shown in FIG.
Is counted down and the video signal of the program being transmitted is switched to the video signal of the next program almost simultaneously at both the transmitting station and the receiving station.

Usually, it is difficult to match the program switching timings of the sending station and the receiving station. Therefore, the receiving station takes the characteristics of the automatic program control device for each sending station into consideration, and the program switching timing of the sending station is slightly longer than that of the sending station. By switching early, the problem that the receiving station receives an extra video signal from the transmitting station at the time of program switching is prevented.

[0009]

In the above-mentioned conventional television net queue control system, the Q transmitted by the transmitting station is transmitted.
The Q signal sending device sends the signal to the sending source station and the receiving partner station, and the automatic program control devices of both through the Q signal receiving device, and as a result, the sending station and the receiving station, and the automatic program control devices of both. Are switching programs almost at the same time.

However, at the program transmitting station, in the case of the program to be transmitted next, particularly in the case of commercial advertisement, since the broadcasting time has already been determined by the program organization, the Q signal transmitted from the station itself is not used, and Although the switching of the video signal of the program may be controlled based on the time information, the receiving station often controls the switching by the Q signal from the transmitting station.

In this case, in the receiving station, the switching control is started after the Q signal is received from the transmitting station by the above-mentioned configuration, so that the switching control is delayed from the switching control timing of the transmitting station, and the receiving station is delayed. There is a problem that an unnecessary video signal is received for a certain amount of time.

An object of the present invention is to provide a television net queue control system which does not receive an unnecessary video signal of the program next to the sending station even if the switching time for the next program is previously decided at the sending station. Is to provide.

[0013]

A television net queue control system according to the present invention controls switching of a transmitted program by a net queue signal (hereinafter referred to as a Q signal) superimposed on a specific horizontal scanning period of a television video signal. In the television net queue control system, the Q signal sending station sends the Q signal to the partner station earlier by a predetermined time from the program switching confirmation time.

When the program switching time has already been determined at the sending station, the Q signal sending station receives the Q signal sending request earlier by a predetermined time from the program switching time,
A delay circuit for delaying the transmission of the Q signal by a predetermined time is provided so that the program switching time at the program video signal receiving station substantially matches the program switching time at the transmitting station.

Further, as a concrete means, the television net queue control system determines whether the program switching time is a fixed time operation in which the program switching time has already been fixed or an unfixed untime operation in the transmitting station which transmits the program video signal. However, in the case of the untimed operation, the normal Q signal is requested to be sent at the normal timing, while in the case of the fixed time operation, the early Q signal is requested to be sent early at the predetermined timing before the fixed time. A delay for inputting a program control device and a request for sending an early Q signal sent from the automatic program control device, and delaying the sending request by delaying by a time that allows the other station to simultaneously switch between the sending station and the program. Circuit, a Q signal transmitting device for superimposing and transmitting the Q signal on the video signal based on the transmission request when the transmission request transmitted from the automatic program control device and the delay circuit is input It is equipped with a.

[0016]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of the present invention. The television net queue control system shown in FIG. 1 is provided with an automatic program control device 1, a Q signal transmission device 2, a Q signal reception device 3 and a delay circuit 4, and the automatic program control device 1 has a fixed time. It has an operation determination unit 5, a clock 6, a Q signal superimposition request unit 7, and a program switching unit 8. Compared to FIG. 4 of the conventional example, a delay circuit 4 and a fixed time operation determination unit 5 of the automatic program control device 1 are added,
In addition, in connection with this, a function is added to the Q signal superimposition requesting unit 7.

The automatic program control device 1 includes a Q signal transmission device 2
When a Q control signal is received from the Q signal receiving device 3, the switching of the program is controlled.

The Q signal transmission device 2 is an automatic program control device 1.
When the Q signal superimposing request is received from the delay circuit 4, the Q signal is superposed on this video signal by the next synchronization signal with respect to the video signal being transmitted to the Q signal receiving device 3 of the transmission destination partner station and its own station. .

The Q signal receiving device 3 extracts the Q control signal from the Q signal received from the Q signal sending device 2 and sends it to the automatic program control device 1.

The delay circuit 4 delays the Q signal superimposition request received from the automatic program control device 1 by a predetermined time and outputs it to the Q signal transmission device 2.

In the automatic program control device 1, the fixed time operation determination unit 5 is the fixed time operation in which the time to switch the program being transmitted to the next program is fixed, or the predetermined time of the program being transmitted. Based on the Q signal transmitted to the Q signal superimposing unit 7, it is determined whether the program is an untime operation for switching the program and output to the Q signal superimposing request unit 7.

The Q signal superimposition requesting unit 7 will be described with reference to FIG. As shown in the figure, the Q signal superimposition requesting unit 7 first checks the operation of the switching time by the fixed time operation determining unit 5 (step S1). When the operation of the switching time is the untime operation (NO in step S2), the Q signal superimposition request unit 7 issues the request for superimposing the Q signal for the switching control of the program being transmitted when the superimposing control time of the Q signal is Q when confirmed
The signal is output to the signal transmission device 2 (procedure S3). On the other hand, in the case of the fixed time operation (YES in step S2), it is output to the delay circuit 4 one second before the switching fixed time based on the clock 6 (procedure S3).
4) It is assumed that

The program switching unit 8 receives the Q signal from the Q signal receiving device 3
The control signal is received and the program switching process is performed.

Next, the delay time of the delay circuit will be described with reference to FIG. 1 and FIG. Here, the Q signal transmission station is provided with an automatic program control device 1, a Q signal transmission device 2, a Q signal reception device 3 and a delay circuit 4, and the reception station has an automatic program control device 11 and a Q signal. Receiving device 13
Shall be provided.

In the automatic program control device 1, when the fixed time operation determining unit 5 determines that the fixed time operation is performed, the Q signal superimposition requesting unit 7 causes the clock 6 to perform 1 second before the program switching control start time. A Q signal superimposing request is output to the delay circuit 4.

Normally, from the output of the Q signal superimposition request by the Q signal superimposition request unit 7, the automatic program control device 11 of the receiving station Q
Two to three fields (2/60 seconds to 3/60 seconds) are required until a signal is received and program switching control is started. Therefore, in the delay circuit 4, 57 fields (57/60
Second), the program switching control of the receiving station is started "1/60 second to 0 second" before the program switching control start time of the transmitting station.

As a result, the program switching control start time of the receiving station is earlier than the program switching control start time of the transmitting station, and it is possible to avoid receiving the video signal of the next program due to the program switching of the transmitting station.

In the above description, when the sending station determines that the fixed time operation is performed, the automatic program control device requests the delay circuit to superimpose the Q signal one second before the switch fixed time, and the delay circuit outputs 57 fields. Although the delay time is added to the Q signal transmission device and output to the Q signal transmission device, another time relationship may be used, and the delay circuit may be included in the automatic program control device or the Q signal transmission device.

[0030]

As described above, according to the present invention, Q
In the case where the signal transmitting station operates in the confirmed switching time in which the program switching time has already been confirmed at the transmitting station, the television net queue which sends this Q signal to the partner station earlier by a predetermined time from the program switching confirmed time. A control method is obtained. With this configuration, it is possible to control the transmission of the Q signal so that the program switching time at the program video signal receiving station substantially coincides with the program switching time at this transmitting station. It is possible to avoid receiving unnecessary video signals.

Further, in the case where the transmitting station of the Q signal is a switching fixed time operation in which the program switching time has already been fixed at the transmitting station, a delay circuit is additionally provided at this transmitting station, and automatic program control is performed. When the device outputs a Q signal transmission request to the Q signal transmission device by advancing by a simple time such as 1 second from the program switching time, and when the delay circuit receives the request from the automatic program control device, the program video is displayed. Transmission of the Q signal is delayed so that the program switching time at the signal receiving station substantially matches the program switching time at the transmitting station. With this configuration, it is possible to obtain a television net queue control system capable of exhibiting the above-mentioned functions by making a small change to the conventional configuration.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing an embodiment of a main operation procedure for the partial function of FIG.

FIG. 3 is a time chart showing an example of program switching in FIG.

FIG. 4 is a functional block diagram showing an example of the related art.

FIG. 5 is a time chart showing an example of program switching in FIG.

[Explanation of symbols]

 1, 11 Automatic program control device 2 Q signal transmission device 3 13 Q signal reception device 4 Delay circuit 5 Fixed time operation determination unit 6 Clock 7 Q signal superimposition request unit 8 Program switching unit

Claims (3)

[Claims] 1. A television net cue control system for controlling switching of a transmitted program by a net cue signal (hereinafter referred to as a Q signal) superimposed in a specific horizontal scanning period of a television video signal, wherein a transmitting station of the Q signal is A television net queue control system characterized in that the Q signal is transmitted to a partner station earlier by a predetermined time from the program switching confirmation time. 2. The program according to claim 1, wherein, when the program switching time has already been determined by the sending station, the Q signal sending station requests a Q signal sending request earlier by a predetermined time from the program switching time. A television net queue which is provided with a delay circuit for delaying the transmission of the Q signal by a predetermined time so that the program switching time at the program video signal receiving station substantially coincides with the program switching time at the transmitting station. control method. 3. A transmission station for transmitting a program video signal in a television net queue control system for controlling switching of a transmission program by a net cue signal (Q signal) superimposed on a specific horizontal scanning period of a television video signal. Determines whether the program switching time is a fixed time operation that has already been fixed or an unfixed untime operation, and in the case of untime operation, the normal Q signal is requested to be sent at the normal timing, while the fixed time In the case of operation, an automatic program control device that requests early transmission of a Q signal at a predetermined timing before the fixed time, and an early Q signal transmitted from the automatic program control device.
A delay circuit for inputting a signal transmission request and delaying the transmission request with a time allowing the simultaneous switching of the transmission station and the program at the partner station, and the automatic program control device and transmission transmitted from the delay circuit When a request is input, the Q signal is superimposed on the video signal and transmitted based on the transmission request.
A television net queue control system, comprising: a signal transmission device.