JP3316700B2 - Television net cue control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television net cue control system, and more particularly to a television cue control system in which television broadcasting stations are connected to each other by a television signal transmission network, which is a network line, and a program transmission is switched. TV net cue control method performed by a so-called Q control signal.

[0002]

2. Description of the Related Art In a conventional net cue control system of this type, when switching control of program transmission is performed, a Q control signal is superimposed on a video signal sent from a generation station of a net cue signal, and then a predetermined time, for example, 3 seconds. When the second elapses, the program from the generating station ends, and the receiving station performs control to switch from the program on the generating station side to the program on the receiving station side three seconds later, triggered by the received Q control signal.

When returning to the program on the generating station side after switching to the program on the receiving station side, an agreement is previously made with the generating station on the basis of the control timing of switching to the receiving station side using the trigger as a key. After the lapse of the program time length, the switching control is performed from the own station program on the receiving station side to the program on the generating station side.

[0004]

In the above-described switching control based on the conventional television net cue system,
Q superimposed on the video signal at the station where the net cue signal is generated
The timing from the end of the control signal to the end of the actual program of the generating station and the switching to another program depends on the variation in the performance of the control device of each broadcasting station, the variation due to the difference in the control device for each broadcasting station, and the video signal. There is variation depending on the state of the line and the characteristics of the device inserted in the middle of the line. For this reason, Q
The time from the control signal to the switching of the program does not match between the generating station and the receiving station. Therefore, there is a disadvantage that it is inevitable that an unnecessary program is transmitted at the switching point to the program on the receiving station side and the switching point to the program on the generating station side after receiving the Q control signal.

[0005] It is an object of the present invention to obviate the disadvantages mentioned above and to provide a Q
It is an object of the present invention to provide a television net cue control system in which an unnecessary program is not transmitted at a switching point of a program on a control signal receiving side.

[0006]

A television net cue control system according to the present invention transmits a television video signal on which a net cue signal for program switching is superimposed from a transmission station to a net line, and the reception station transmits the television video signal to the net line. A television net cue control system configured to detect a net cue signal superimposed on a received television video signal from the television network to perform program switching control, wherein the transmitting station switches at a program switching timing of an output video signal. Means for generating a still image signal of the immediately preceding video signal and transmitting the signal to the network, and the receiving station having means for switching to the own station program after a lapse of a predetermined period in response to reception of the net cue signal It is characterized by the following.

Another television net cue control system according to the present invention transmits a television video signal on which a net cue signal for program switching is superimposed from a transmitting station to a net line, and a receiving station receives the television video signal from the net line. A television net cue control system in which program switching control is performed after a certain period of time after detecting a net cue signal superimposed on a television video signal, wherein the receiving station responds to the reception of the net cue signal. Before
Immediately before the lapse of the certain period, a still image signal of the received video signal from the network line is generated and the received video signal is generated.
It is characterized by having means for replacing and switching to the own station program after the predetermined period .

Another television net cue control system according to the present invention transmits a television video signal, on which a net cue signal for program switching is superimposed, from a transmission station to a net line, and a reception station receives a television picture signal from the net line. A television net cue control system in which program switching control is performed after a certain period of time after detecting a net cue signal superimposed on a television video signal, wherein the receiving station responds to the reception of the net cue signal. When switching from the own station program to the program on the net line after the elapse of the certain period, a still image signal of the own station program is generated and replaced with the own station program immediately before the elapse of the certain period ,
It is characterized by having a means for switching programs after the certain period .

Still another television net cue control system according to the present invention transmits a television video signal on which a net cue signal for program switching is superimposed from a transmission station to a network line, and a reception station receives the television image signal from the network line. A television net cue control system in which program switching control is performed after a certain period of time after detecting a net cue signal superimposed on a television video signal, wherein the receiving station responds to the reception of the net cue signal. still image signal the received video to generate a received video signal from the net line immediately before the predetermined period elapses and
Replacing the signal, and means for switching the local station program after the predetermined period, when switching from the local station programs after the predetermined period in response to the program of the net line to the reception of said net cue signal, the constant Immediately before the period elapses, a still image signal of the own station program is generated and replaced with the own station program.
It is characterized by having means for switching programs after a certain period .

[0010]

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

FIG. 1 is a block diagram showing one embodiment of a television net queue control system according to the present invention.
In the embodiment shown in FIG. 1, the transmitting station has a control device for controlling the switching of the video signal transmission, a video switcher for program switching on the transmitting station 2, and a still image signal for storing the input video signal. A video screen still image (freeze) device 3 to be output, a net cue superimposing device that superimposes on a transmission video signal that transmits a net cue signal 4, a transmission device 5 that transmits a video signal in which a net cue signal is superimposed on a television signal transmission line 5 , A local broadcast transmitter 6 and a transmitting antenna 7 are provided.

On the receiving station side, a receiving device 8, a net cue signal detecting device 9 for detecting a net cue signal from an output of the receiving device 8, a control device 10 for controlling switching of video signal transmission, and switching a video signal to be transmitted. Video switcher 11
Are provided, and the transmitting station and the receiving station are connected by a net line j.

Next, the operation of the embodiment shown in FIG. 1 will be described.

The control device 1 on the transmitting station side, that is, on the side of the net cue signal generating station, transmits a control signal f for controlling the superposition of the net cue signal to the net cue signal transmitting device 4,
The video signal i on which the control signal is superimposed is transmitted to the television signal transmission line transmission device 5. The control device 1 that has controlled the transmission of the net cue signal has a predetermined time, for example, 3
After a lapse of seconds, the program is executed by controlling the video switcher 2 via the switching control lines a and b for the video signals c and d of the program material to be transmitted. The video signal as the broadcast material of the own station on the transmitting station side is sent to the broadcast transmitting device 6 of the own station as it is, with the video execution signal g of the video switcher 2 being broadcasted on the transmitting antenna 7.

On the other hand, the control device 1 sends the video output signal c or d of the video switcher 2 to the video screen still image (freeze) device 3. The control device 1 executes the switching control of the program material, and at the same time, the video screen still image (freeze)
For the device 3, a screen freeze (freeze) control is performed by a control line e.
Run through. Video screen still image (freeze) device 3
The video output signal h from is converted to a video screen in which the final screen of the video signal c is frozen (frozen) to the program material before switching,
The signal is sent to the net cue signal superimposing device 4.

The video signal i on which the net cue signal subjected to the series of control processes is superimposed is transmitted to the transmitting device 5. The output of the transmitting device 5 is sent to a signal transmission line j.

The video signal k on which the Q control signal is superimposed received by the receiving device 8 on the receiving station side, ie, the net cue signal detecting station side, is used as a video signal of broadcast program material transmitted from the receiving station's own station. It is sent to the net cue signal detection device 9.

The net cue signal detecting device 9 outputs the video signal k
, And demodulates the Q control signal m, and supplies these to the control device 10.

Upon receiving the Q control signal, the control device 10 sends a control signal u to the video switcher 11 after a lapse of the same predetermined time as described above (3 seconds in the above), and the program to be broadcast from its own station. Is switched from the video signal k provided by the net cue generating station to the own station program material video signal s and transmitted.

After the Q control signal m is detected, the control device 1
0 controls the video switcher 11 and the timing of switching to the video signal d on the transmitting station side does not coincide with the timing of switching to the video signal d, the video signal from the transmitting station side is changed to the video signal of the screen immediately before switching. The problem of sending an unnecessary screen d in which the transmitted video signal from the receiving station side apparently switches from the video signal c to the video signal d for a moment and then switches to the video signal s by being repeatedly transmitted as a still image. Does not occur.

FIG. 2 is a timing chart for explaining the control timing of each part in the embodiment of FIG.

(A) shows the timing when the net cue generating station broadcasts as its own broadcast material. The video signal c transmitted as its own broadcast material is also transmitted as the video signal transmitted to the receiving station. At the program end timing to, the receiving station switches to a video signal d that is not required.

(B) is a timing at which the net cue signal on the side of the net cue generating station is superimposed and transmitted to the television signal transmission network. The Q control signal v for controlling the superposition of the net cue signal is a switching timing to. Are superimposed in advance by a predetermined period T1. The video signal transmitted to the receiving station at the program end timing to is transmitted as a still image c 'of the last screen of the video signal c obtained from the same video signal c as the video signal c transmitted as the broadcast material of the own station.

(C) shows the timing when the receiving station sends the same signal as the broadcasting material of the local station on the side of the transmitting station to the television signal transmission network according to the prior art. After receiving the Q control signal v, after a lapse of a delay of a predetermined period T2,
Switching from the video signal k received at the timing t4 to the own station video signal s is performed. However, since the characteristics of the control device on the transmitting station side are not constant, a period T5 obtained by subtracting the period T1 is used.
During this time, an unnecessary video d is transmitted at the receiving station.

(D) is the timing on the receiving station side shown in the embodiment of FIG. 1. During a period T5 obtained by subtracting the period T1 from the period T2, a still image c 'of the final screen of the video signal c is transmitted. The appearance of the video signal c is apparently continued, thereby suppressing the transmission of the unnecessary video d.

FIG. 3 is a block diagram showing another embodiment of the television net cue control system according to the present invention, and the same parts as those in FIG. 1 are denoted by the same reference numerals. In this embodiment, the video still image (freeze) device 3 shown in FIG. 1 is inserted into a received video signal k from the transmitting station on the receiving station side instead of the transmitting station side and input to the video switcher. It is a thing.

Next, the operation of the embodiment shown in FIG. 3 will be described.

The control from the transmitting station side, that is, the net cue signal generating station side, has no video still image (freeze) device, and the screen output to the television signal transmission network is
In the net cue signal transmission device 4, the Q control signal is superimposed,
After a predetermined time, for example, 3 seconds, the video signals c and d of the program material to be transmitted are changed to the screen of the video signal i switched by the video switcher 2.

As the video signal input to the receiving station, video signals c and d of the program material are input.
Video signal k input from the transmitting station before input to
With respect to the above, the video screen still image (freeze) device 3 is inserted, and the still image video signal n is output to the video switcher 11. The control device 10 on the receiving station side demodulates the Q control signal m
When the control signal u is received, the control signal u is sent to the video switcher 11 after the predetermined time described in FIG.
To the video screen still image (freeze) device 3 via the control line e at a timing after a lapse of less than 3 seconds in anticipation of the unnecessary screen transmission time in advance. .

By repeatedly inputting the still image signal c 'of the video signal c before switching from the input video signal c to the video signal d, the video signal apparently transmitted from the receiving station side becomes the transmitting station. There is no problem that the unnecessary image d is transmitted, that is, the video signal c is momentarily switched from the video signal c to the video signal d and then switched to the video signal s.

FIG. 4 is a timing chart for explaining the control timing of each part in the embodiment of FIG.

(A) is the timing when the net cue generating station broadcasts as its own broadcast material, and the video signal c transmitted as its own broadcast material is also transmitted as the video signal transmitted to the receiving station. At the program end timing to, the receiving station switches to a video signal d that is not required. FIG.
Same as (a).

(B) is a timing at which the net cue signal is superimposed on the net cue generating station side and transmitted to the television signal transmission network, and the Q control signal v for controlling the superposition of the net cue signal is a switching timing to. Are superimposed in advance by a predetermined period T1. The video signal is the same as the broadcast material of the own station. From the video signal c, the video signal d not required by the receiving station at the program end timing to
Is transmitted.

(C) shows the timing when the receiving station sends the same signal as the broadcasting material of the local station at the transmitting station to the television signal transmission network, which is the prior art. After the reception of the Q control signal v, the switching from the video signal k received at the timing t4 to the own station video signal s is performed after a delay of a predetermined period T2 has elapsed. However, since the characteristics of the control device on the transmitting station side are not constant, an unnecessary image d is transmitted from the receiving station during the period T5 after subtracting the period T1. This is the same as FIG.

(D) is a timing showing a video signal when the video signal j input from the transmitting station passes through a video screen still image (freeze) device on the receiving station side. After receiving the Q control signal v, in consideration of the transmission time of the unnecessary screen, a timing t that elapses a time shorter than the predetermined period T2
At timing 6, the video signal c is changed to the still screen signal c '.

(E) is the timing of the video signal transmitted from the receiving station shown in the embodiment of FIG. 3, and a still image c 'of the video signal c is transmitted between time t6 and time t4. By making it seem that the video signal c is continued, the transmission of the unnecessary video d is suppressed.

FIG. 5 is a block diagram showing another embodiment of the television net cue control system according to the present invention, and the same parts as those in FIGS. In the present embodiment, the video still image (freeze) device 3 in FIG. 3 is inserted not into the received signal from the transmitting station on the receiving station side, but into the program material video signal input s from the receiving station's own station, and into the video switcher. Is input.

Next, the operation of the embodiment shown in FIG. 5 will be described.

In this embodiment, the video signal transmitted from the receiving station side is suppressed by an unnecessary video signal when the program material of the receiving station itself is switched to the video signal from the transmitting station side, ie, the net cue signal generating station. is there.

Since there is no video still image (freeze) device on the transmitting station side, the drawing output to the television signal transmission line network has the Q control signal superimposed by the net cue signal transmitting device 4 and is predetermined. After a lapse of time, for example, 3 seconds, the video signals c and d of the program material to be transmitted are switched by the video switcher 2. Further, after a lapse of the program time length of the pre-contracted transmission program at that time, the video signal c or another video signal is again transmitted. The screen of the video signal i switched to the program material is displayed.

A video screen still image (freeze) device 3 is inserted into the video signal s of the program material in the local station which is input to the receiving station, and is input to the video switcher 11. Upon receiving the demodulated Q control signal m, the control device 10 on the receiving side sends a control signal u to the video switcher 11 after the predetermined time described in FIG. The signal c is switched to the video signal s of the own station program and transmitted from the own station.

At this time, when returning to the program of the generating station from the transmission of the program of the own station, the program time length determined in advance with the generating station using the Q control signal m as a key is determined by the control unit 10 on the receiving station side. After the time elapses, the switching is performed by the switching control signal y from the local station program s on the receiving station side to the program k on the generating station side.
In this case, after performing the screen freeze (freeze) control via the control line e to the video screen still image (freeze) device 3 at the timing when the switcher should be switched, the switcher switching is performed in advance by setting the transmission time of the unnecessary screen. Control by delaying to the expected timing.

By delaying the timing of switching from the input video signal s to the video signal c and repeatedly inputting the still picture signal s' of the video signal s, the video signal apparently transmitted from the receiving station side becomes apparent. Own station program material video signal s
There is no problem that the unnecessary screen d is transmitted for a moment after switching to the video signal d on the transmitting station side and then switching to the video signal c.

FIG. 6 is a timing chart for explaining the control timing of each part in the embodiment of FIG.

(A) is the timing when the net cue generating station broadcasts as its own broadcast material, and the video signal c transmitted as its own broadcast material is also transmitted as the video signal transmitted to the receiving station. At the program end timing to, the receiving station switches to a video signal d that is not required. Further, after a lapse of the program time length of the contracted outgoing program at that time, the video signal c or another program material is switched again at timing t10.

(B) is a timing at which the net cue signal on the side of the net cue generating station is superimposed and transmitted to the television signal transmission network. The Q control signal v for controlling the superposition of the net cue signal is a switching timing to. Are superimposed in advance by a predetermined period T1. The video signal is the same as the broadcast material of the own station. From the video signal c, the video signal d not required by the receiving station at the program end timing to
Is transmitted. Further, after a lapse of the program time length of the previously transmitted outgoing program contracted in advance, at timing t1
At 0, the display is switched to the video signal c or another program material again.

(C) shows the timing when the receiving station sends the same signal as the broadcasting material of the local station to the television signal transmission network, which is the prior art. After the reception of the Q control signal v and the elapse of a predetermined period T2, the video signal k received at the timing t4 is switched to the own station video signal s. Further, after a lapse of the program time length of the previously transmitted outgoing program contracted in advance, the video signal k from the transmitting station or another program material is switched again at timing t14. However, the characteristics of the control device on the sending station side are not constant
Therefore, between the timing t14 and t10, the receiving station would unwanted image d is delivered.

(D) is a timing showing the video signal n when the video signal n input with the program material of the own station passes through the video screen still image (freeze) device on the receiving station side. Q
After receiving the control signal v, the timing t
After switching at 4, the video signal s is changed to the still image signal s' at the timing t14 when the switcher should switch from the program material s of the own station to the material k from the transmitting station.

FIG. 5E shows the timing of the video signal transmitted from the receiving station shown in the embodiment of FIG. 5. After the video signal is converted to a still image, the timing until the transmission time of the unnecessary screen is considered in advance until timing t16. Switcher control with delay. From time t14 to time t16, the still image s ′ of the video signal s
Is transmitted, and the transmission of the unnecessary video d is suppressed by making it seem that the video signal s is continued.

FIG. 7 is a block diagram showing still another embodiment of the television net cue control system according to the present invention, and the same parts as those in FIGS. This embodiment inserts the video still image (freeze) device 3 in FIG. 3 into a received video signal k from a transmitting station,
The video still image (freeze) device 3 'is inserted into the material video signal input s from the receiving station in FIG. 6 and input to the video switcher.

The operation of this embodiment is a combination of the embodiment of FIG. 3 and the embodiment of FIG. A problem that unnecessary screens are transmitted regardless of whether the timing at which the Q control signal from the transmitting station is superimposed and the timing at which the video signals c and d return to c are earlier or later than the control timing at the receiving station. Does not occur.

[0052]

As described above, according to the present invention, the program of the generating station is actually terminated from the Q control signal superimposed on the video signal of the generating station of the net cue signal, and the program is switched to another program. TV that can eliminate fundamentally unnecessary programs at the switching point of a program by filling the transmission of unnecessary video signals caused by the variation in the timing up to the still image of the video signal at the end of the program immediately before switching. There is an effect that a John Net queue control system can be realized.

[Brief description of the drawings]

FIG. 1 is a system block diagram of one embodiment of the present invention.

FIG. 2 is a control timing chart showing the operation of the block in FIG.

FIG. 3 is a system block diagram of another embodiment of the present invention.

FIG. 4 is a control timing chart showing the operation of the block in FIG. 3;

FIG. 5 is a system block diagram of another embodiment of the present invention.

FIG. 6 is a control timing chart showing the operation of the block in FIG. 5;

FIG. 7 is a system block diagram of still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 10 Control device 2, 11 Video switcher 3, 3 'Video screen still image device 4 Net cue signal superposition device 5 Television line transmission and transmission device 6 Local station transmitter 7 Transmission antenna 8 Television line transmission and reception device 9 Net cue signal detection device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N ^7/ 00-7/088 H04N 5/00 H04N 5/262-5/28 H04N 5/38-5/46

Claims (4)

(57) [Claims] 1. A television video signal on which a net cue signal for program switching is superimposed is transmitted from a transmitting station to a net line, and a net cue signal superimposed on a received television video signal from the net line is transmitted to a receiving station. A television net cue control system configured to detect and perform program switching control, wherein the transmitting station transmits a video signal immediately before switching at a program switching timing of an output video signal.
The receiving station has means for generating a still image signal and sending it to the network, and the receiving station has means for switching to the own station program after a lapse of a predetermined period in response to reception of the net cue signal. Television net cue control system. 2. A television video signal on which a net cue signal for program switching is superimposed is transmitted from a transmitting station to a net line, and a net cue signal superimposed on a received television video signal from the net line is transmitted at a receiving station. Detect
A television network queue control system so as to form a program switching control after a predetermined period from the receiving station, the constant in response to receiving the net cue signal
Immediately before the period elapses, a still image signal of the video signal received from the net line is generated and replaced with the received video signal.
And a means for switching to the own station program after the predetermined period . 3. A television video signal on which a net cue signal for program switching is superimposed is transmitted from a transmitting station to a net line, and a net cue signal superimposed on a received television video signal from the net line is transmitted at a receiving station. Detect
A television net cue control system configured to perform program switching control after a predetermined period of time , wherein the receiving station responds to the reception of the net cue signal from the program of the own station after the lapse of the predetermined period from the connection of the network line. When switching to a program, a still image signal of the own station program is generated and replaced with the own station program immediately before the fixed period elapses, and
A television net cue control system comprising means for switching programs after a fixed period . 4. A television video signal on which a net cue signal for program switching is superimposed is transmitted from a transmitting station to a net line, and a net cue signal superimposed on a received television video signal from the net line is transmitted at a receiving station. Detect
A television network queue control system so as to form a program switching control after a predetermined period from the receiving station, the constant in response to receiving the net cue signal
Immediately before the period elapses, a still image signal of the video signal received from the net line is generated and replaced with the received video signal.
And, and said means for switching to the local station program after a certain period of time, when switching from the local station program after said predetermined period of time in response to receiving the net cue signal to the program of the net line, the predetermined period elapses Immediately before performing, a still image signal of the own station program is generated and replaced with the own station program.
A television net cue control system comprising means for switching programs after a short time.