JP2003333626A - Broadcast contents monitor device and send-back voice generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a broadcast contents monitor device and a send-back voice generator, which monitor that an output of a broadcasting station is being transmitted as contents of a broadcast wave, without always gazing an intra-station monitor of the broadcasting station and generate send-back voice of N-1 obtained by removing voice of the broadcasting station from the broadcast wave. <P>SOLUTION: A difference between a signal obtained by stepwise delaying a signal of the broadcasting station by a means (3) and a signal obtained by receiving and demodulating the broadcast wave is obtained for each frame by a means (4). When the obtained difference is within a preliminarily determined allowable range, broadcasting of the signal of the broadcasting station is judged to be started, and a time difference between the signal of the broadcasting station and the broadcast wave is measured by means (3 and 4), and the signal of the broadcasting station is delayed by the time difference obtained by measurement, and a difference between the delayed signal and the signal obtained by receiving and demodulating the broadcast wave is obtained by the means (4). When the obtained difference exceeds a preliminarily determined allowable range, broadcasting of the signal of the broadcasting station is judged to be terminated. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcasting system, and more particularly, to monitoring the start and end of the broadcasting of its own station and the contents of broadcasting during broadcasting when broadcasting via a relay line.
A broadcast content monitoring device that can output a broadcast content monitoring signal only by the device system, even if the monitor screen that receives the broadcast wave is not always monitored by a human system, and a return sound generated by using the broadcast content monitoring device Regarding the device.

[0002]

2. Description of the Related Art Conventionally, when broadcasting via a relay line,
To monitor the start, end, and broadcast contents of your own station, for example, you can actually receive the broadcast wave and display it on the monitor screen, and the video and the video sent from your station to the relay line. The method is used to visually compare and confirm that the signal of the own station has started and ended.

This method will be described with reference to FIG. 1 conceptually shows a method of confirming the start and end of own station broadcasting in the prior art. Note that FIG. 17 shows a case where the broadcasting system is composed of facilities related to broadcasting stations, key stations, relay lines, and program distribution lines, and for simplicity, there are three broadcasting stations and one key station. There is. In FIG.
The signal switch 26 provided in the broadcasting station a27 is, for example, as necessary, for example, a VTR 20, a still image device 22, a studio 2
4 output signals, signals received from a relay vehicle (not shown), etc. are selected and connected to the relay line 28. Further, the signal switch 26 selects the output signal of the VTR 20 and selects the relay line 2
8 is connected to the broadcasting indicator light a21, the output signal of the still image device 22 is selected, the broadcasting indicator light b23 is selected, and when the output signal of the studio 24 is selected, the broadcasting indicator light c25. Has a function of lighting each.

The relay line 28 transmits the output signal of the signal switch 26 of the broadcasting station a27 to the key station 29. Key station 29
In accordance with the program transmission data or by a manual operation, a signal from the broadcasting station a27, a signal transmitted from another broadcasting station via another medium-fiber line, or an output signal of its own station, such as a VTR. (Not shown) or the like is switched.

Further, the output signal of the key station 29 is sent to the broadcasting station a27 via the program distribution line a30 and the program distribution line b.
38 to the broadcasting station b39 and the program distribution line c40
And is transmitted to the broadcasting station c41 via the. Broadcasting station a
In the case of 27, the signal of the program distribution line a30 is first input to the control device 31. Control device 31
Is, for example, a signal received from a relay vehicle or a program distribution line a.
The output signal from 30 is switched at an appropriate timing according to program transmission data or by manual operation,
It is transmitted to the broadcasting station 33 by using the broadcasting station relay line 32.

[0006] The broadcasting station 33 modulates a carrier wave using the signal transmitted by the broadcasting station relay line 32 to make a broadcasting wave, and transmits it from the transmitting antenna 34 to general receiving households. The broadcast station a27 also includes a broadcast wave receiver 36 connected to a receiving antenna 35 for receiving this broadcast wave, the output of which is connected to an in-station monitor 37, and if necessary, the video and audio of the broadcast wave may be transmitted. Can be monitored. The program distribution line b38 and the broadcasting station b39, and the program distribution line c40 and the broadcasting station c41 have the same relationship. The combination of the receiving antenna 35, the broadcast wave receiver 36, and the in-station monitor 37 operates in the same manner as a combination of an antenna and a receiver of a general receiving household.

Now, for example, the studio 2 of the broadcasting station a27
When broadcasting 4 outputs nationwide, first, signal switch 2
The output of the studio 24 is selected by 6 and the relay line 28
And transmits to the key station 29. And the key station 29
Outputs the output of the relay line 28 to the broadcasting stations nationwide using the program distribution line a30, the program distribution line b38, and the program distribution line c40, that is, the broadcasting station a27, the broadcasting station b39, and the broadcasting station c.
41 to 41. Furthermore, broadcasting station a27, broadcasting station b3
9. The broadcasting station c41 uses the control device (the broadcasting station b39 and the broadcasting station c41 are not shown) to operate the program distribution line a3.
0, the program distribution line b38, and the output of the program distribution line c40 are connected to the broadcasting station relay lines of the respective broadcasting stations and transmitted to the respective broadcasting stations.

Now, the time difference between the input and output signals generated by the relay line 28 is t _d1 , the time difference between the input and output signals by the program distribution line a30, the program distribution line b38, and the program distribution line c40 is t _d2 , and the broadcasting station The time difference between the input signal of 33 and the signal of actually modulating the carrier wave by the signal to make a broadcast wave is t _d3 , the broadcast wave is received, the broadcast wave receiver 36 demodulates and outputs to the in-station monitor 37. It is assumed that the time difference that occurs during the operation is t _d4 .

By the way, the signal switch 26 is used in the studio 24.
It has a function of lighting the during-broadcasting indicator light c25 when the output of is selected. However, in general, the time when the key station 29 connects the signal of the broadcasting station a27 to the program distribution line a30, the program distribution line b38, and the program distribution line c40 is the time when the output of the studio 24 is selected by the signal switch 26. Are different.

FIG. 18 shows, for each of the above signals,
Alternatively, it indicates the timing at which the indicator lamp or the in-office monitor operates. In FIG. 18, (a) is the output signal of the studio 24 of the broadcasting station a27, (b) is the operation of the signal switch 26, (c) is the operation of the broadcasting indicator light c25 of the studio 24, and (d) is the relay line. 28, (e) is the output signal of the key station 29, (f) is the output signal of the program distribution line a30, (g) is the content of the broadcast wave, (h) is the display on the in-station monitor 37, and (i) ) Indicates the time when the output of the broadcasting station a27 is broadcast.

The time differences t _d1 , t _d2 , t _d3 and t _d4 in FIG. 18 are shown in conformity with the definitions of the time differences t _d1 to t _d4 described above. The time difference t _d3 mainly depends on the encoding system and the modulation system of the broadcast machine, and the time difference t _d4 depends on the demodulation system of the broadcast wave receiver. Furthermore, these time differences t _d1 , t _d2 , t _d3 and t _d4 are generally different numerical values. In an actual system, the key station 29 is connected between the output of the studio 24 and the input of the relay line 28.
There is a time difference between the input and output of the program, the output of the program distribution line a30 and the input of the broadcasting station 33, but these time differences are all smaller than t _d1 , t _d2 , t _d3 and t _d4. So ignore it here.

In FIG. 18, the output of the studio 24 of the broadcasting station a27 is, for example, 6 cuts from cut 0 to cut 5, and the times at which these cuts change are t ₁ , respectively.
Let t ₂ , t ₃ , t ₄ , and t ₅ (see FIG. 18A).
Cut 0 and cut 5 are so-called discarded cuts that are sent to the relay line 28 but are not used for actual broadcasting. Also, the time to connect the signal switch 26 to the output of the studio 24 to trunk line 28, for example, the middle of t _on cut 0, time, and during the t _off cut 5 for releasing the connection (FIG. 18 ( b)) and Studio 24
Since the in-broadcasting indicator light c25 is interlocked with the operation of the signal switch 26, it is turned off until time t _on , is turned _on from time t _on to time t _off, and is turned _off after time t _off (FIG. 1).
8 (c)). On the other hand, the output of the relay line 28 is the time difference t.
_{By d1} , t ₁₀ = t _on + t _d1 In (1), the state of no output is switched to the cut 0, and t ₁₁ = t _off + t _d1 In (2), the state changes from the cut 5 to the state of no output (see FIG. 18D).

Next, the key station 29, for example, initially transmits the signal of another station, and the output of the relay line 28 is cut 1.
At time t ₆ when it changes to
It is assumed that the signal is switched to the signal of another station again at time t ₇ in the middle of cut 4 (see FIG. 18E). Here, the time t ₆ is t ₆ = t ₁ + t _d1 (3) is required.

Considering the time difference t _d2 between the input and output of the program distribution line a30, it is t ₁₂ = t that the output of the program distribution line a30 is switched from the signal of another station to the output of the studio 24 of the broadcasting station a27. ₆ + t _d2 = t ₁ + t _d1 + t _d2 It is the time t ₁₂ obtained in (4) (see FIG. 18 (f)), and it is obtained at t ₁₃ = t ₇ + t _d2 (5) that the output of the studio 24 of the broadcasting station a27 is switched to the signal of another station. It is time t ₁₃ (see FIG. 18F).

Further, considering the time difference t _d3 at the broadcasting station 33 and the time difference t _d4 at the broadcast wave receiver 36, when the broadcasting station a 27 switches the output of the studio 24 to the cut 1 at time t ₁ , In-station monitor 37 of station a27
The display of is switched to cut 1 at time t ₈ obtained by the equation (6) (see FIGS. 18 (h) and 18 (i)). t
₈ = t ₁ + t _d1 + t _d2 + t _d3 + t _d4
(6) Further, even if switched from the output of the studio 24 key station broadcasting station a27 to signals of other stations at a time t _7, the display of the station monitor 37 of the broadcast station a27 is changed to the signal of another station is (7 ) Is time t ₉ (FIG. 18).
(See (h) and (i)). t ₉ = t ₇ + t _d2 + t _d3 + t _d4 (7)

As described above, t ₈ ≠ t _on (8) and t ₉ ≠ t _off (9) Therefore, it is not possible to know the time when the output of the studio 24 is broadcast nationwide by turning on the on-air indicator light c25. Also, even if the broadcasting station a27 switches the output of the studio 24, Is the time difference t _{d10 of the} equation (10).
After the lapse of time, the display on the in-station monitor 37 is switched. t _d10 = t _d1 + t _d2 + t _d3 + t _d4 (10) Further, when the key station 29 switches from the output of the studio 24 of the broadcasting station a27 to the signal of another station, (11)
After the lapse of the time difference t _{d11 in the} equation, the display on the in-office monitor 37 is switched. t _d11 = t _d2 + t _d3 + t _d4 (11)

These time relationships also apply between the broadcasting station a27 and the receiving household. Normally, in such a case, the switching timing is notified by a direct communication line provided between the key station 29 and the broadcasting station 27, or a portable electric cable. However, such a communication means may not be available from a place other than the studio 24 of the broadcasting station a27, for example, when a relay vehicle is used. In addition, even if the communication means can be secured, in order to operate reliably, the on-air indicator light c
25, a direct communication line, and a mobile phone without relying solely on the in-station monitor 37 to constantly monitor the content of the broadcast wave by the output of the studio 24 of the broadcast station a27, and the signal of another station. A method of visually confirming that the switch has been performed is used. However, this method requires a lot of human labor and could cause a broadcast accident.

[0018]

As described above,
When a signal from a broadcasting station is once transmitted to a key station via a relay line, the signal is sent from the key station to another broadcasting station via a program distribution line, and when it is transmitted as a broadcast wave to general receiving households, it is broadcast. Regarding the monitoring of the contents, there were the following first to third problems. The first problem is that the output of the signal switch of the broadcasting station a is not transmitted as a broadcast wave as it is because the key station is in between. That is, the time when the output of a is broadcast is not the same. Further, even when the output of the signal switch of the broadcast station a is transmitted as a broadcast wave as it is without switching operation at the key station, there is the above-mentioned time difference, and therefore the time when the broadcast station a operates the signal switch and the inside of the station. The time when the monitor display changes does not match. Therefore, on the side of the broadcasting station a, it is necessary to keep an eye on the image without knowing the timing of switching when monitoring the broadcast contents.

The second problem is that the relay line, the program distribution line, the broadcasting station, and the broadcast wave receiver each have a time difference between the input and output, so that the output of the broadcasting station a and the station where the actual broadcasting wave is received. The monitor output will have a time difference. Therefore, the broadcasting station a has to monitor the broadcast contents having a time difference with each other, and the larger the time difference, the more difficult it is to monitor the broadcast contents.

A third problem is that, for example, when a broadcast station a receives a signal from a relay vehicle outside the station and transmits the signal to the key station via a relay line for broadcasting, the key station relays the relay vehicle. Returned voice without so-called voice, so-called N-
That is, the relay vehicle does not always receive 1 as described above. Generally, in such a case, the sound of the broadcast wave will be monitored, but since the sound of the site is also included, the announcer will have to speak while listening to his own voice with the earphone and make an announcement. Very difficult or
Or, there is a possibility that the monitor sound of the broadcast wave may go around the microphone and cause howling.

An object of the present invention is to solve the above-mentioned problems and to monitor that the output of the local station is being transmitted as the content of the broadcast wave without always watching the in-station monitor of the broadcasting station. It is an object of the present invention to provide a broadcast content monitoring device and a return voice generation device that enable the generation of N-1 return voices by removing the voice of its own station from broadcast waves.

[0022]

In order to achieve the above object, the broadcast content monitoring apparatus of the present invention determines, for each frame, a difference between a signal obtained by gradually delaying a signal of a broadcasting station and a signal obtained by receiving and demodulating a broadcast wave. Obtained in, when the obtained difference is within a predetermined allowable range, while determining that the broadcasting of the signal of the broadcasting station has started, measuring the time difference between the signal of the broadcasting station and the broadcast wave, When the signal of the broadcasting station is delayed by the time difference obtained by the measurement, the difference between the delayed signal and the signal obtained by demodulating the broadcast wave is obtained, and the obtained difference exceeds a predetermined allowable range. It is characterized in that it is configured to determine that the broadcasting of the signal of the broadcasting station has ended.

Further, the broadcast content monitoring apparatus of the present invention comprises a first image memory for storing a digitized broadcast station signal,
Signal storage means for delaying the signal read from the first image memory, second image memory for storing a signal obtained by receiving and demodulating a digitized broadcast wave, signal read from the first image memory or the signal A signal comparing means for calculating the difference between the output signal of the accumulating means and the signal read from the second image memory and outputting a difference signal, and whether the output signal of the signal comparing means exceeds a predetermined allowable value. Determining means for outputting the broadcast content monitoring signal based on the determination result, and the on-air information of the broadcasting station is input, and the first image memory and the signal accumulating means based on the on-air information. A control / processing means for transmitting and receiving signals to and from the second image memory, the signal comparing means and the determining means, controlling the circuit elements and grasping the processing status of the circuit elements. Those characterized by comprising comprises.

Further, the return sound generating apparatus of the present invention obtains, for each frame, the difference between the signal obtained by delaying the signal of the broadcasting station in stages and the signal obtained by receiving and demodulating the broadcast wave, and the obtained difference is predetermined. When it is within the allowable range, the time difference between the broadcast station signal and the broadcast wave is measured, the voice signal of the broadcast station is delayed by the time difference obtained by the measurement, and the broadcast wave is received and demodulated from the voice signal. It is characterized in that the delayed voice signal is subtracted to generate the return voice from which the voice of the broadcasting station is removed.

Further, the return sound generating apparatus of the present invention is characterized in that the sound signal of the broadcasting station is replaced with the sound signal of the relay vehicle.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments of the invention with reference to the accompanying drawings. As described above, the broadcast content monitoring apparatus of the present invention has the signal switching unit 2 in the broadcast station a27 in FIG. 17 described in the section of the prior art.
6 is configured to perform the following processing after the time when the signal of its own station is connected to the relay line 28.

That is, first, the output signal of the signal switch 26 of the broadcasting station a27 (see FIG. 17 for the code) is given a time difference in the delay direction and compared with the output signal of the broadcast wave receiver 36, When it is determined that they are the same signal, the information that the signal of its own station is output as a broadcast wave is extracted. After that, the output signal of the signal switch 26 is observed in time series on a frame-by-frame basis, and when a large change is detected between frames, the signal of the frame and the detection time are stored in advance in the storage means. . Then, after that time, when the same signal as the signal of the frame is detected from the output signal of the broadcast wave receiver 36, the signal of the frame and the detection time are stored. The previously stored time is subtracted from the newly stored time to obtain a new time difference.

After that, the output signal of the signal switch 26 is delayed by a new time difference and the output signal of the broadcast wave receiver 36 is compared, and it is judged whether they are the same signal. At the time when this is detected, it is determined that the signal of the local station is not in the broadcast wave, and the determined information is extracted. When the signal switch 26 disconnects the signal of its own station from the relay line 28, the above operation is stopped.

FIG. 1 is a block diagram showing the basic configuration of the broadcast content monitoring apparatus of the present invention. In FIG. 1, 1 is A
/ D converter, 2 is the image memory a, 3 is the signal storage means, 4
Is signal comparison means, 5 is determination means, 6 is control / processing means,
Reference numeral 7 is a receiving antenna, 8 is a broadcast wave receiver, 9 is an A / D converter, and 10 is an image memory b.

Next, the operation will be described. The video output signal of the signal switch 26 of the broadcasting station a27 shown in FIG. 17 is converted into a digital signal by the A / D converter 1 of FIG.
It is input to the image memory a2. The image memory a2 can store a plurality of frames of data. The output of the image memory a2 is branched into two, one of which is input to the signal comparison unit 4 via the signal storage unit 3 and the other of which is directly input to the signal comparison unit 4.

The broadcast wave of the broadcast station a27 (see FIG. 17) is
Broadcast wave receiver 8 connected to receiving antenna 7 shown in FIG.
Is demodulated by and the video signal is output. This video signal is converted into a digital signal by the A / D converter 9,
It is input to the image memory b10. The image memory b10 is
Like the image memory a2, it is possible to store data of a plurality of frames. The output of the image memory b10 is input to the signal comparison means 4.

The output of the signal comparison means 4 is used by the judgment means 5 for the judgment processing. The judging means 5 can take out the broadcast content monitoring signal from this. Also, the broadcasting station a2
The on-air information of the signal switch 26 of No. 7 is input to the control / processing means 6. The control / processing means 6 is connected to each of the image memory a2, the image memory b10, the signal accumulating means 3, the signal comparing means 4, and the judging means 5, and delivers data, performs an operation based on the data, and an operation result. Control of the entire device, such as delivery of broadcast signals and output of broadcast content monitoring signals.

Further, the circuit operation of FIG. 1 will be described in detail with reference to a flow chart. 2 to 6 are flowcharts showing the operation of the broadcast content monitoring apparatus of the present invention.
First, a description will be given with reference to FIG. Flow chart is ST
First, after ART, in order to determine whether or not a signal is being sent from the broadcasting station a27 (see FIG. 17) to the relay line, the signal switch 26 (FIG. 1) of the broadcasting station a27 is used.
7)), the control / processing means 6 determines whether or not the on-air information is output (step ST1).
If not output, step ST1 is repeated. If it is output, the initial value t _do1 of the time difference between input and output is given to the signal storage means 3 (step ST2). Next, the initial value e ₀₁ of the allowable error is given to the signal comparison means 4 (step ST
3).

Next, the output of the signal switch 26 of the broadcasting station a27 is A / D converted using the A / D converter 1 (step ST4). The A / D converted digital data is stored in time series in the image memory a2 (step ST5). The amount of data stored corresponds to a plurality of frames. further,
The signal storage means 3 gives a time difference of t _d01 to the data in the image memory a2 (step ST6). In parallel with the processing of steps ST4 to ST6, the output of the broadcast wave receiver 8 is A / D converted using the A / D converter 9 (step ST7). The A / D converted digital data is stored in time series in the image memory b10 (step ST8). Similar to the image memory a2, the image memory b1
The amount of data stored in 0 corresponds to a plurality of frames.

Hereinafter, description will be made with reference to FIG. After completion of steps ST6 and ST8, the signal storage means 3
And the output data of the image memory b10 are input to the signal comparison means 4 (step ST9). The signal comparing means 4 compares the data corresponding to the same pixel position on the screen of one frame by using the both data, and judges whether the difference is less than or equal to the allowable error e ₀₁ (step ST10). If the allowable error e ₀₁ is exceeded, the process returns to step ST4 and step ST7 to repeat the above process. At this time, the value of t _{d0 1} is updated (step S
T10-1 (see FIG. 2)).

If the allowable error is e ₀₁ or less, the broadcasting station a
The control / processing means 6 determines whether or not the on-air information is output from the signal switch 26 of 27 (step ST
11). If the broadcast information is output, the determination means 5 outputs a broadcast content monitoring signal indicating that the broadcast content matches (step ST12). Further, at this time, the time t ₃₆ when the image memory a2 takes in the image is subtracted from the time t ₃₀ when the image memory b10 takes in the image, and t _d01 is updated with the value (step ST12-1). If the information during broadcasting is not output, the control / processing means 6 operates so as to return to the first step ST1.

A description will be given below with reference to FIG. After the end of step ST12-1, the A / D converter 1 sends the broadcast station a27.
A / D conversion is performed on the output of the signal switching device 26 (step S).
T13). The A / D converted digital data is stored in time series in the image memory a2 (step ST14). When the signal comparison means 4 and the control / processing means 6 detect that a large change has occurred between the frames in the output of the image memory a2, that is, when the data difference between the frames exceeds the allowable value e _11. , Its time t ₃₁ is obtained (step ST15). This allowable value e ₁₁ is a value which the control / processing means 6 has previously given to the signal comparison means 4. After that, the control / processing means 6 gives the signal comparison means 4 an allowable error e ₀₃ (step ST16). The output of the broadcast wave receiver 8 is set to A in parallel with the processing of steps ST13 to ST16.
A / D conversion is performed by the / D converter 9 (step ST1
7). Next, the A / D-converted digital data is stored in time series in the image memory b 10 (step ST1).
8).

A description will be given below with reference to FIG. After completion of steps ST16 and ST18, step S
The signal comparing means 4 compares the data of the image memory a2 at t ₃₁ obtained at T15 with the data of the image memory b10 after t _31.
(Step ST19). The signal comparing means 4 compares the data of both the data corresponding to the same pixel position on the screen of one frame, and judges whether the difference between them is the allowable error e ₀₃ or less (step ST2).
0). If the difference exceeds the allowable error e ₀₃ , step ST
17 repeats the process of comparing the data in the image memory b10 of data and time t ₃₁ after stored in the image memory a2 at time t ₃₁ back to.

[0039] On the other hand, when the difference is equal to or less than the allowable error e ₀₃ obtains a first time t ₃₂ which falls below the tolerance e _03,
The new time difference t _d02 is defined by the equation (12) (step ST21). _{t d02 = t 32 -t 31 (} 12) further determines depending on whether the equation (13) is a reasonable value t _d02 determined by (12) (step ST22). 0 <t _d02 <t _dmax (13) Here, t _dmax is the maximum input / output time difference that can occur in the broadcast network in which the broadcast station a27 is configured as a key station.
If t _d02 does not satisfy the expression (13), step ST
Returning to 12-1, the above processing is repeated. t _d02 is (1
When the expression (3) is satisfied, the control / processing means 6 gives the time difference t _d02 between the input and output to the signal storage means 3 (step ST2).
3). Further, the allowable error e ₀₄ is given to the signal comparison means 4 (step ST24).

Hereinafter, description will be made with reference to FIG. Next, A
The / D converter 1 converts the output of the signal switch 26 of the broadcasting station a27 into digital data (step ST2).
5). Subsequently, the A / D converted digital data is stored in time series in the image memory a2 (step ST2).
6). Further, the signal storage means 3 gives a time difference between the input and output of t _d02 to the data in the image memory a2 (step ST27). In parallel with these processes, the broadcast wave receiver 8
The output of is converted into digital data by the A / D converter 9 (step ST28). The A / D converted digital data is stored in time series in the image memory b10 (step ST29).

Next, the output data of the signal storage means 3 and the data of the image memory b10 are input to the signal comparison means 4 (step ST30). The signal comparing means 4 compares the data corresponding to the same pixel position on the screen of one frame by using the both data, and judges whether or not the difference between them is less than or equal to the allowable error e ₀₄ (step ST31). If the allowable error e ₀₄ is exceeded, the determination means 5 determines that the broadcast portion of the local station has ended, and outputs a broadcast content monitoring signal indicating that the broadcast content does not match (step ST3).
4) After resetting the state, stop the operation and set the flowchart to END. On the other hand, when the allowable error is e ₀₄ or less, the control / processing means 6 further determines whether or not the on-air information is output from the signal switch 26 of the broadcasting station a27 (step ST32). If the on-air information is not output, step ST34 is executed to set the flowchart to END. On the other hand, if the during-broadcasting information has been output, the control / processing means 6 outputs a signal indicating that the broadcast contents match, and holds the state (step ST
33). After that, step ST25 and step ST
Returning to 28, the above-mentioned processing is repeated.

Further, it will be described in detail with reference to a time chart. FIG. 7 is a time chart showing the operation of the broadcast content monitoring apparatus of the present invention. In FIG. 7, (a) is the output of the signal switch 26 of the broadcasting station a27, and (b) is the broadcasting station a2.
No. 7 information during broadcasting of the signal switch 26, (c) is the broadcasting station a2
7 is the output of the signal switch 26, (d) is the data acquisition time of the image memory a2, (e) is the output of the broadcast wave receiver 8,
(F) is the data acquisition time of the image memory b10,
(G) shows the time difference between the input and output of the signal storage means 3, (h) shows the allowable error of the signal comparison means 4, and (i) shows the state of the broadcast content monitoring signal.

The signal switch 26 of the broadcasting station a27 displays the time t._on
From time t_offUp to the output of broadcasting station a27
Connect (see FIG. 7A). During broadcast of signal switch 26
Information is linked to the operation of the signal switch 26, so relay
Time t as well as connection to the line _onFrom time t_offUp to
The in-transit information is output to the broadcast content monitoring device (Fig. 7).
(See (b)). In addition, the signal switch 26 of the broadcasting station a27
Output is time t_onFrom time t_offUp to
It is assumed that there is a change from dot 1 to cut n (FIG. 7).
(See (c)). Image memory a2 and image memory b10 are
Tick t_onAfter that, the broadcast station a27 receives signals at a fixed cycle.
A / D converted data output from the signal switch 26 and broadcast
The output of the wave receiver 8 (see FIG. 7E) was A / D converted
Data is taken in (see FIGS. 7D and 7F).
Also, at time t_onIn the signal storage means 3 during input / output
Initial value t of the gap_d01(See FIG. 7 (g)), signal comparison means
4 is the initial tolerance e₀₁(See FIG. 7 (h)), and
And the allowable error e between the data frames of the image memory a2
₁₁Is given.

The key station 29 first sends the signal of another station to the program distribution line, switches from the middle of cut 1 of the signal from the broadcast station a27, and transmits the signal of the broadcast station a27 to the middle of cut n. It is assumed that the signal is sent to the program distribution line and then the signal of another station is sent again. At this time, the output of the broadcast wave receiver has become to the time t ₃₄ and signals of other stations, the time t ₃₄ after, until time t ₃₅ becomes a signal of a broadcast station a27,
Time t ₃₅ later becomes a signal of another station.

Time t_onAfter that, the data in the image memory a2
Time difference t between input and output_d01Delay only image memory b
Compare with 10 data. And the difference between these is
Difference e ₀₁Time t when it is determined that₃₀Match the broadcast content
A broadcast content monitoring signal indicating that the broadcast is being performed is output (FIG. 7).
(See (i)). Time t₃₀After that, the output is that state
Hold.

After time t ₃₀ , the process starts to measure the accurate time difference from the output of the signal switch 26 of the broadcasting station a27 to the output of the broadcast wave receiver 8. First, a new allowable error e ₀₃ is given to the signal comparison means 4. Next, the image memory a2
The time t ₃₁ at which it is determined that the difference between the data frames between the frames exceeds the allowable error e ₁₁ , and the data for one frame of the image memory a2 at the time t ₃₁ is stored. The stored data is compared with the output of the broadcast wave receiver 8 after t ₃₁ , that is, the data in the image memory b10, and as a result of the comparison, it is determined at time t ₃₂ that the difference between them is equal to or smaller than the allowable difference e _03. To save. From t ₃₁ and t ₃₂ thus obtained,
The time difference t _d02 is calculated using the equation (12). Moreover, if the numerical value satisfies the expression (13), it is determined that t _d02 is accurate time difference and gives the signal storage means 3 t _d02 as input and output time difference. Further, a new allowable error e ₀₄ is given to the signal comparison means 4.

Time t₃₂After that, the time difference t between the input and output described above
_d02And tolerance e₀₄Is used to make the determination. Signal storage means
3 output and the output of the image memory b10 are compared, and the comparison result
Is e ₀₄Below, and broadcast from the signal switch 26
If the medium information is output, the broadcast content matches
The output state of the broadcast content monitoring signal indicating that is maintained. Release
The output of the transmitter / receiver 8 is time t₃₅At the other station's signal
When replaced, the output of the signal storage means 3 and the image memory b
The result of comparing the outputs of 2 is time t₃₃After that, e₀₄To
Cross over. At this time, the on-air information is output from the signal switch 26.
Time t₃₃After that, the broadcast content is inconsistent
A broadcast content monitoring signal indicating that is output. It should be noted that
Error e₀₄Is a key station 29, and characters etc. are added to the signal of the broadcasting station a27.
Does not determine that the broadcast content has been switched even if the
So e₀₁, E₀₃Larger value than

FIG. 8 is a time difference measurement for measuring the time difference between the output signal of the signal switch of the broadcast station a and the video signal obtained by demodulating the broadcast wave, which constitutes the broadcast content monitoring apparatus of the present invention. The circuit is shown. In FIG. 8, 50 is A
/ D converter, 51 is a sync separation / clock generation circuit, 52
Is a frame memory a, 53 is a 1-frame delay memory, 5
4 is a comparator, 55 is an allowable value e ₁₁ setting device, 56 is a one-frame memory, 57 is a comparator, 58 is an allowable value e ₀₃ setting device, 5
9 is an inverter, 60 is an OR circuit, 61 is an AND circuit,
62 is an RS flip-flop, 63 is a pulse length counter, 64 is a determination circuit, 65 is an allowable value 0, t _dmax setter,
66 is a time difference measuring circuit, 67 is a system clock generating circuit, 68 is a frame memory b, 69 is an A / D converter, 7
Reference numeral 0 is a sync separation / clock generation circuit, 71 is a broadcast wave receiver, and 72 is a reception antenna.

The operation will be described. In FIG. 8, the video output signal of the signal switch of the broadcasting station a is the A / D converter 5
0 and input to the sync separation / clock generation circuit 51, A / D converted based on the clock generated by the sync separation / clock generation circuit 51, and the frame memory a52
Read in. The frame memory a52 can store video data of one frame or more, and reads the data in synchronization with the system clock supplied by the system clock generation circuit 67.

On the other hand, the broadcast wave received by the receiving antenna 72 is demodulated by the broadcast wave receiver 71, and the demodulated video signal is input to the A / D converter 69 and the sync separation / clock generation circuit 70 for synchronization. A / D based on the clock generated by the separation / clock generation circuit 70
It is converted and read into the frame memory b68. Like the frame memory a52, the frame memory b68 can store one or more frames of video data, and reads the data in synchronization with the system clock supplied by the system clock generation circuit 67.

The output data of the frame memory a52, the output data of the frame memory b68, the system clock, and the on-air information of the signal switch of the broadcasting station a are input to the time difference measuring circuit 66. It is assumed that the on-air information of the signal switch of the broadcasting station a becomes logic H while the output of the broadcasting station a is connected to the relay line.

The output of the frame memory a52 is connected to the 1-frame delay memory 53, the comparator 54, and the 1-frame memory 56. An allowable value e ₁₁ setting device 55 is connected to the comparator 54. The comparator 54 compares the output of the frame memory a52 between frames, the output at time t ₃₁ which exceeds the allowable value e ₁₁ becomes logic H. That is, the time t _{31 at} which the output of the signal switch of the broadcasting station a changes significantly is detected. Further, at time t ₃₁ , the data in the frame memory a 52 is stored in the 1-frame memory 56.

1 frame memory 56 and frame memory b
68 is connected to the comparator 57. In addition, the comparator 57
A permissible value e ₀₃ setting device 58 is connected to. Comparator 5
7 compares the data are sequentially read from the data and the frame memory b68 stored in a frame memory 56 at time t _31, the output at time t ₃₂ the difference between the two becomes e ₀₃ hereinafter is logic H . That is, at time t ₃₂ when the video signal output obtained by demodulating the broadcast wave changes significantly.
To detect.

The on-air information of the signal switch of the broadcasting station a is AN.
The output of the inverter 59 is connected to the R input of the RS flip-flop 62 through the OR circuit 60, and the output of the AND circuit 61 is connected to the S input. Broadcast information is logic L
When, the output of the RS flip-flop 62 maintains the state of logic L, and when the on-air information is logic H,
The output of the RS flip-flop 62 becomes logic H only from time t _{31 to} time t ₃₂ . The time t _d02 during which the output of the RS flip-flop 62 is logic H is measured using the pulse length counter 63 and output to the determination circuit 64. The determination circuit 64 includes a tolerance 0, t _dmax setter 6
5 is connected, and the result of measurement by the pulse length counter 63 outputs the data of the time difference t _dmax when the result satisfies Expression (13). In this way, the time difference between the input of the relay line, that is, the output of the signal switch of the broadcasting station a and the video signal obtained by demodulating the broadcast wave can be measured.

FIG. 9 is a block diagram showing the first embodiment of the broadcast content monitoring apparatus of the present invention. In FIG.
80 is a frame memory c, 81 is a comparator, 82 is a tolerance error e ₀₁ , e ₀₄ setting device, 83 is a time difference t _d01 , t _d02 setting device, 84 is an inverter, 85 is an AND circuit, and 86 is an OR.
Circuit, 87 is a rise detection circuit, 88 is an inverter,
89 is an OR circuit, 90 is an RS flip-flop, 91
Is an AND circuit, 92 is a sequence control circuit, and 12
Reference numeral 0 is a broadcast content monitoring device. The other circuit elements are shown with the same reference numerals as in FIG.

The operation will be described. Frame memory a
52, the output of the frame memory b68, the system clock, and the on-air information of the signal switch of the broadcasting station a are all input to the time difference measuring circuit 66, and as described with reference to FIG. The time difference between the output and the video signal obtained by demodulating the broadcast wave is measured. Further, the inverter 84, the AND circuit 85, the OR circuit 86, the rising detection circuit 87, the inverter 88, the OR circuit 89, and the RS.
The flip-flop 90 and the AND circuit 91 both constitute a logic circuit for outputting a broadcast content monitoring signal.

The system clock is the time difference measuring circuit 66.
In addition, a frame memory a52 and a frame memory b6
8, frame memory c80, time difference t_d01, T_d02Configuration
Supply to the device 83 and the sequence control circuit 92, respectively
To be done. Frame memory a5 according to the system clock
2 data is read and written in the frame memory c80
Get caught. Time difference t_d01, T_d02The setting device 83 is a broadcasting station.
Immediately after the on-air information of the signal switch of a becomes logic H
Is the time difference t between the input and output data of the frame memory c80.
_d01The read clock is supplied so that Also,
Tolerance e₀₁, E ₀₄The setting device 82 permits the comparator 81.
Error e₀₁To set. Output data of frame memory c80
Data from the data output from the frame memory b68
Compared with 1, the broadcast contents match and the allowable error e₀₁Is within
Output logic H to the A / D circuit 85
To do. At this time, the on-air information of the signal switch of the broadcasting station a is
Logic H and the allowable error e of the comparator 81₀₄Shows
Signal is logic L, so RS flip-flop
90 is set, the output of the AND circuit 91, that is,
If the broadcast content monitoring signal changes from logic L to logic H
The status changes to indicate that the broadcast contents are the same.

After that, the time difference measuring circuit 66 outputs the time difference t.
_d02And time difference t_d01, T_{d0 2}For the setting device 83
Output. Time difference t_d02After the measurement of the
Difference t _d01, T_d02The setter 83 is the frame memory c80.
Time difference between input and output data is t _d02Read to be
Supply the clock. Also, the allowable error e₀₁, E₀₄Setting device
82 is a permissible error e with respect to the comparator 81.₀₄To set. F
Output data of frame memory c80 and frame memory b6
The output data of 8 is compared by Hikari 81 and the broadcast contents match.
And the allowable error e₀₄Invar when it is determined to be within
The logic H is output to the output circuit 84 and the OR circuit 86. This
As a result, the RS flip-flop 90 is in the set state.
Maintained and broadcast content monitoring signal maintains logic H status
To do.

On the other hand, the comparator 81 compares the output data of the frame memory c80 and the output data of the frame memory b68, and when it is judged that the allowable error e ₀₄ is exceeded, the output to the inverter 84 and the OR circuit 86 is changed from logic H to logic H. Change to L. The output of the inverter 84 is connected to the rising edge detection circuit 87, so that the RS
The flip-flop 90 is reset, the broadcast content monitor signal is changed to the logic L state, and it is output that the broadcast content does not match.

FIG. 10 shows a second embodiment of the broadcast content monitoring apparatus of the present invention.
Is shown in a block diagram. In FIG. 10, 100 is a CPU, 101 is a memory, and 102 is an input / output interface. The other circuit elements are denoted by the same reference numerals as those in FIGS. 8 and 9.

The operation will be described. In FIG. 10, the main part of the broadcast content monitoring device 120 is the CPU 10
0, the memory 101, and the input / output interface 102, and the same operation as the monitoring device described in FIG. 9 is realized by using software. Also in this case, the output signal of the signal switch of the broadcast station a, the broadcast wave, and the on-air information of the signal switch of the broadcast station a are input to the broadcast content monitoring device,
A broadcast content monitoring signal is output. It should be noted that in the present embodiment, the CPU 100 is, for example, a high-speed DSP (Digi
tal Signal Processor).

FIG. 11 shows the third embodiment of the broadcast content monitoring apparatus of the present invention.
Is shown in a block diagram. In FIG. 11, reference numeral 130 is a fall detection circuit, 131 is a rise detection circuit, 132 is an inverter, 133 is an OR circuit, and 134 is an RS flip-flop. The other circuit elements are denoted by the same reference numerals as those in FIGS. 8 to 10.

The operation will be described. In the present embodiment, when the broadcast content monitoring device 120 described with reference to FIGS. 9 and 10 determines that the broadcast content matches, that is, the broadcast is in progress, a device-in-use warning signal is generated. is there. In the present embodiment, at the time t _on when the output of the signal switch of the broadcasting station a is connected to the relay line, it is detected that the on-air information of the signal switch has changed from logic L to H and the RS flip-flop is detected. 134 is set, the device-in-use warning signal is changed from logic L to H, and the state is held. At the same time, the broadcast content monitoring device 120 is activated to output a broadcast content monitoring signal. When the broadcast of the broadcast station a is completed and the broadcast content monitoring device 120 detects a mismatch, the broadcast content monitoring signal changes from logic H to logic L. The fall detection circuit 130 detects this change,
The RS flip-flop 134 is reset to change the device busy warning signal from logic H to L.

FIG. 12 shows the fourth embodiment of the broadcast content monitoring apparatus of the present invention.
Is shown in a block diagram. The reference numerals assigned to the constituent elements are the same as those assigned to FIGS. 8 to 11. In the present embodiment, the broadcast content monitoring device 120 compares and monitors the content of the output signal of the program distribution line a and the broadcast wave of the broadcast station a. Here, it is assumed that the on-air information of the program distribution line a of the broadcasting station a becomes logic H and the broadcast content monitoring device 120 is operated at the time when the broadcasting station a is broadcasting the output of the program distribution line a. . This makes it possible to monitor whether the contents of the program distribution line a and the contents of the broadcast wave match.

FIG. 13 shows the fifth embodiment of the broadcast content monitoring apparatus of the present invention.
Is shown in a block diagram. The reference numerals assigned to the constituent elements are the same as those assigned to FIGS. 8 to 11. In the present embodiment, the broadcast content monitoring device 120 compares and monitors the output signal of the control device of the broadcast station a and the content of the broadcast wave of the broadcast station a. Here, broadcasting station a
The on-air information of the control device becomes a logic H to operate the broadcast content monitoring device 120 at the time when the broadcast station a is broadcasting a signal received from a device such as a studio in its own station, a VTR, or a relay vehicle. I shall. by this,
It is possible to monitor whether or not the content transmitted from the broadcast station a to the relay line for the broadcast station from the broadcast station a matches the content of the broadcast wave implemented in the service area of the broadcast station a.

In the first to fifth embodiments of the broadcast content monitoring apparatus of the present invention described above, both the output signal of the signal switch of the broadcast station a and the output signal of the broadcast wave receiver 71 are analog signals. However, when these are digital signals, the configuration may be as shown in FIGS. 14A and 14B, for example. In FIG. 14, 110 is a video data extracting circuit, 111 is a clock reproducing circuit, 112 is a buffer memory, 113 is a receiving antenna, 114 is a broadcast wave receiver, 115 is a clock reproducing circuit, 116 is a video data extracting circuit, and 117 is It is a buffer memory.

The operation will be described. As shown in FIG. 14A, from the broadcasting station a, for example, SDl (Serial Dig
When the digital video signal and the digital audio signal are multiplexed and sent by the italInterface) signal, the clock is reproduced by the clock reproduction circuit 111, and the video data extraction circuit 110 is operated based on the reproduced clock to perform digital reproduction. Take out only the video signal. After the extracted signal is read into the buffer memory 112, the frame memory a52 shown in FIGS.
Output to.

Also, as shown in FIG. 14B, the broadcast wave received by the receiving antenna 113 is demodulated by the broadcast wave receiver 114 to obtain a digital signal. The clock reproduction circuit 115 reproduces a clock from the digital signal, and the video data extraction circuit 116 operates based on the reproduced clock to extract only the digital video signal. After the extracted signal is read into the buffer memory 117, it is converted into digital video data as shown in FIGS.
To the frame memory b68. Further, the case of handling a digital video signal has been described above, but it goes without saying that the same processing can be performed on a digital audio signal and the same effect can be obtained.

Next, the return voice generating apparatus of the present invention will be described. FIG. 15 is a block diagram showing an embodiment of the return voice generating apparatus of the present invention. In FIG. 15, 121 is an A / D converter, 122 is a memory d, 123.
Is an A / D converter, 124 is an AND circuit, 125 is a subtractor, 126 is a D / A converter, 127 is an audio monitor or earphone, 128 is a time difference corrector, and 129 is a weighting circuit. The other circuit elements are denoted by the same reference numerals as those in FIGS. 8 to 10.

The operation will be described. First, the return sound generating apparatus of the present invention is configured by using the broadcast content monitoring apparatus 120 of the present invention described above. In FIG. 15, the broadcast content monitoring device 120 receives the video output signal of the signal switch of the broadcast station a, the broadcast wave of the broadcast station a, and the on-air information of the signal switch of the broadcast station a, and the time difference t _d02 The data, the audio signal from the broadcast wave receiver 71, and the broadcast content monitoring signal are output.

The audio output signal of the signal switch of the broadcasting station a is A
Converted to digital data by the / D converter 121,
It is read into the memory d122. The time difference corrector 128 corrects the time difference between the time difference t _d02 obtained from the video signal of the broadcast wave receiver and the audio signal of the signal switch of the broadcast station a, and sets the time difference of the audio signal in the memory d122. The audio signal obtained from the broadcast wave receiver 71 is the A / D converter 1
It is converted into a digital signal by 23. The A / D converted digital signal and the broadcast content monitoring signal are AND circuits 12
4, the broadcast station a is on the air and the broadcast content monitoring signal output from the broadcast content monitoring device 120 is logic H.
Only during the period, the weighting circuit 129 digitally adjusts the audio level and inputs it to the subtractor 125.
The subtractor 125 subtracts the data read from the memory d122 by giving the time difference corrected as described above and the audio data of the broadcast wave. Then, the subtraction output is used as the D / A converter 12
By converting into an analog signal by 6, the audio from the audio monitor or earphone 127 from which the audio multiple from the broadcasting station a is removed is output.

With the above-mentioned return voice generation device, so-called N-1 return voice can be generated. In FIG. 15, it goes without saying that the memory d122, the time difference corrector 128, the AND circuit 124, the weighting circuit 129, and the subtractor 125 are replaced by a combination of CPU, input / output interface, and memory as shown in FIG. This device can also be applied when relaying from outside the station using a relay vehicle. In this case, the audio signal of the relay vehicle is used instead of the audio output signal of the signal switcher of the broadcasting station a, and the signal of logic H is used instead of the on-air information of the signal switcher of the broadcasting station a. The same effect can be obtained by inputting the time during which the signal is being transmitted.

In the embodiment of the return sound generating apparatus of the invention described above, both the output signal of the signal switch of the broadcast station a and the output signal of the broadcast wave receiver 71 are analog signals. When is a digital signal, the configuration may be as shown in FIGS. 16A and 16B, for example. In FIG. 16, reference numeral 140 is an audio data extracting circuit, 141 is a clock reproducing circuit, 142 is a buffer memory, 143 is an audio data extracting circuit, 144 is a clock reproducing circuit, and 145 is a buffer memory.
The other circuit elements are denoted by the same reference numerals as in FIG.

The operation will be described. As shown in FIG. 16 (a), the clock reproduction circuit 141 reproduces a clock from the digital signal output of the broadcasting station a, and the audio data extraction circuit 140 is operated based on the reproduced clock.
Extract only digital audio signals. The signal thus taken out is read into the buffer memory 142 and then outputted as digital audio data to the memory d122 in FIG.

Further, as shown in FIG. 16B, the broadcast wave received by the receiving antenna 113 is used as the broadcast wave receiver 1.
Demodulate by 14 to obtain a digital signal. The clock reproduction circuit 115 reproduces a clock from the digital signal, and the video data extraction circuit 116 operates based on the reproduced clock to extract only the digital video signal.
After the read signal is read into the buffer memory 117, it is output as digital video data to a frame memory (not shown) in the broadcast content monitoring apparatus 120 of FIG.

On the other hand, the audio data is the clock reproduction circuit 14
4, the clock is reproduced, and the audio data extraction circuit 143 is operated based on the reproduced clock to extract only the digital audio signal. After the read signal is read into the buffer memory 145, it is output to the AND circuit 124 of FIG. 15 as digital audio data.

As described above, according to the broadcast content monitoring apparatus of the present invention, the output of the signal switching unit of the own station, the in-air information of the signal switching unit of the own station, and the broadcast wave of the own station are used as the apparatus of the present invention. By inputting into, it becomes possible to monitor the broadcast contents while the signal of the own station is on the broadcast wave, without superimposing a special control signal on the broadcast wave.

It should be noted that if the initial value t _d01 of the time difference between input and output given to the signal accumulating means 3 (see FIG. 1) is a value close to the above-mentioned t _d02 , extremely good operation can be obtained, but t _d01 = 0.
Of course, good operation can be obtained. Also,
If the time difference between the input and output of the entire broadcast network, that is, t _{d10 in} the above equation (10) is known in advance, t _d01 , t _d02
It goes without saying that a good operation can be obtained by using t _d10 instead of. Alternatively, step ST in FIG.
Satisfies the value of t _d01 obtained in 12-1 0 <t _d01 <t _{d max,} it is possible to use this t _d01 instead of t _d02. Here _, t _dmax is _the same as that shown in the equation (13). In this case, it goes without saying that steps ST13 to ST21 (see FIGS. 4 and 5) can be omitted.

Further, the signal of the own station is taken into the image memory a2 (see FIG. 1) at a cycle t ₅₀ , and thereafter, the output of the broadcast wave receiver of the own station is stored in the image memory b10 (see FIG. 1) frame by frame. It is also possible to take in and compare, and use the time difference when the difference between the two becomes less than or equal to the allowable value e _{01 of the} signal comparison means 4 (see FIG. 1). Further, the output signal of the signal switcher of the own station is not limited to the output of the studio, but may be, for example, the VTR, the still image device, or the signal of the relay vehicle received by the own station.

In addition to the case of nationwide broadcasting via the key station, only the output / VTR of the studio, the still image device, the relay vehicle received by the own station are provided only for the service area of the own station. When broadcasting a signal, the output of the signal switch 26 is directly input to the control device, and then the signal is transmitted to the broadcasting station via the broadcasting station relay line to transmit the broadcast wave. Of course, the present invention can be applied to such a case.

Further, the present invention can be applied to any case where a general terrestrial microwave circuit, a communication satellite circuit, or an optical fiber circuit is used as the relay circuit and the program distribution circuit. Further, instead of a combination of a key station, a program distribution line, a control device, a relay line for a broadcasting station, a broadcasting station and a transmitting antenna, a signal is directly sent from the key station to a broadcasting satellite or a communication satellite, and a broadcasting wave is sent to each home. Of course, the present invention can be applied to the case of broadcasting.

In the above description, the video signal is used as an example to configure the broadcast content monitoring apparatus of the present invention, but the same processing can be performed on the audio signal and the same effect can be obtained. Needless to say.

Further, by using the broadcast content monitoring apparatus of the present invention,
For example, in order to obtain the return sound in the relay vehicle,
It is realized by giving a time difference t _d02 between input and output to the voice output of the relay vehicle and subtracting it from the voice signal obtained from the broadcast wave receiver.

In the above description, the signal comparison means calculates the difference between the two input data in the time domain and compares it with the allowable error.
(Discrete Fourier Transform) Comparing in the frequency domain by computing, comparing by computing the correlation coefficient, or
It goes without saying that the two data can be similarly compared by combining these plural methods. Further, not only the comparison and calculation for each pixel but also all the pixels included in one frame are grouped into a plurality of flocs composed of a plurality of pixels, and in the block, for example, a luminance signal, a color difference signal, etc. Calculate the average value, median, standard deviation, etc. of
It goes without saying that a method of comparing and calculating with blocks of other frames can be applied. Furthermore, the signal comparison means may also compare two input data with a permissible error in one frame and output the comparison result, but the comparison with the permissible error is performed with a plurality of frames to improve the comparison accuracy. Of course, it is possible.

[0085]

According to the present invention, the time difference between the input of the relay line and the video signal obtained by demodulating the broadcast wave can be measured during the broadcast of the own station without using a special signal. Becomes Furthermore, it is possible to monitor whether the broadcast contents match by comparing the signal sent from the own station with the signal obtained by delaying the measured time difference and demodulating the broadcast wave.

By appropriately selecting the input signal used for monitoring the broadcast content, when the signal sent to the program distribution line is being broadcast, or, for example, the signal is sent from a relay vehicle and broadcast. The same monitoring is possible even when there is. In addition, it is possible to issue information that warns that the device is in use from the measured value of the above time difference and the information indicating the state in which a signal is being sent from the device of the own station to the relay line. It is possible to prevent an erroneous operation in which the device is inadvertently stopped until the broadcast ends.
As a result, it is possible to reduce the burden on the operating side and to provide a high-quality broadcasting service to the receiver.

Furthermore, a signal obtained by adding the above-mentioned time difference to the voice signal sent from the own station or, for example, a relay vehicle,
By subtracting from the audio signal obtained by demodulating the broadcast wave, it is possible to obtain the return sound from which the sound of the own station or, for example, the relay vehicle is removed.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic configuration of a broadcast content monitoring device of the present invention.

FIG. 2 is a flowchart showing the operation of the broadcast content monitoring apparatus of the present invention.

FIG. 3 is a flowchart showing the operation of the broadcast content monitoring apparatus of the present invention.

FIG. 4 is a flowchart showing the operation of the broadcast content monitoring apparatus of the present invention.

FIG. 5 is a flowchart showing the operation of the broadcast content monitoring apparatus of the present invention.

FIG. 6 is a flowchart showing the operation of the broadcast content monitoring apparatus of the present invention.

FIG. 7 is a time chart showing the operation of the broadcast content monitoring apparatus of the present invention.

FIG. 8 is a block diagram for configuring the broadcast content monitoring apparatus of the present invention.
The time difference measuring circuit for measuring the time difference between the output signal of the signal switch of the broadcasting station a and the video signal obtained by demodulating the broadcast wave is shown.

FIG. 9 is a block diagram showing a first embodiment of the broadcast content monitoring device of the present invention.

FIG. 10 is a block diagram showing a second embodiment of the broadcast content monitoring device of the present invention.

FIG. 11 is a block diagram showing a third embodiment of the broadcast content monitoring device of the present invention.

FIG. 12 is a block diagram showing a fourth embodiment of the broadcast content monitoring device of the present invention.

[Fig. 13] A fifth embodiment of the broadcast content monitoring apparatus of the present invention is shown in a block diagram.

FIG. 14 shows an example of the configuration of the broadcast content monitoring apparatus of the present invention when the output signal of the signal switch of the broadcast station a and the output signal of the broadcast wave receiver are digital signals.

FIG. 15 is a block diagram showing an embodiment of the return voice generating apparatus of the present invention.

FIG. 16 shows an example of the configuration of the return sound generating apparatus of the present invention when the output signal of the signal switch of the broadcast station a and the output signal of the broadcast wave receiver are digital signals.

FIG. 17 conceptually shows a method of confirming the start and end of own station broadcasting in the prior art.

FIG. 18 shows the timing of operation of each signal or of the indicator lamp and the in-office monitor.

[Explanation of symbols]

1, 9 A / D converter 2 image memory a 3 signal accumulating means 4 signal comparing means 5 determining means 6 control / processing means 7 receiving antenna 8 broadcast wave receiver 10 image memory b 20 VTR 21 broadcasting indicator light a 22 stationary Image device 23 Broadcasting indicator light b 24 Studio 25 Broadcasting indicator light c 26 Signal switch 27 Broadcasting station a 28 Relay line 29 Key station 30 Program wiring line a 31 Control device 32 Broadcasting station relay line 33 Broadcasting station 34 Transmitting antenna 35 Reception antenna 36 Broadcast wave receiver 37 In-station monitor 38 Program wiring line b 39 Broadcasting station b 40 Program distribution line c 41 Broadcasting station c 50,69 A / D converter 51,70 Synchronous separation / clock generation circuit 52 Frame memory a 53 1 frame delay memory 54, 57 comparator 55 allowable value e ₁₁ setting device 56 1 frame memory 58 allowable value e ₀₃ setting device 59 Inverter 60 OR circuit 61 AND circuit 62 RS flip-flop 63 Pulse length counter 64 Judgment circuit 65 Allowable value 0, t _dmax setter 66 Time difference measurement circuit 67 System clock generation circuit 68 Frame memory b 71 Broadcast wave receiver 72 Reception antenna 80 Frame memory c 81 Comparator 82 Allowable error e ₀₁ , e ₀₄ setter 83 Time difference t _d01 , t _d02 setter 84, 88 Inverter 85, 91 AND circuit 86, 89 OR circuit 87 Rise detection circuit 90 RS flip-flop 92 sequence Control circuit 100 CPU 101 Memory 102 Input / output interface 110, 116 Video data extraction circuit 111, 115 Clock reproduction circuit 112, 117 Buffer memory 113 Reception antenna 114 Broadcast wave receiver 120 Broadcast content monitoring device 121, 12 3 A / D converter 122 memory d 124 AND circuit 125 subtractor 126 D / A converter 127 voice monitor or earphone 128 time difference corrector 129 weighting circuit 130 falling detection circuit 131 rising detection circuit 132 inverter 133 OR circuit 134 RS flip Flop 140 Audio data extraction circuit 141, 144 Clock reproduction circuit 142, 145 Buffer memory 143 Audio data extraction circuit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yusuke Mita             1-1 Odori Nishi, Chuo-ku, Sapporo-shi, Hokkaido Japan             Sending Association Sapporo Broadcasting Station F-term (reference) 5C022 CA00                 5C061 BB13 CC01

Claims (4)

[Claims] 1. A difference between a signal obtained by gradually delaying a signal of a broadcasting station and a signal obtained by receiving and demodulating a broadcast wave is obtained for each frame, and when the obtained difference falls within a predetermined allowable range,
While determining that the broadcasting of the signal of the broadcasting station has started, measuring the time difference between the signal of the broadcasting station and the broadcast wave, delaying the signal of the broadcasting station by the time difference obtained by the measurement, and delaying The difference between the received signal and the signal obtained by demodulating the broadcast wave, and when the calculated difference exceeds a predetermined allowable range, it is determined that the broadcasting of the signal from the broadcasting station has ended. Broadcast content monitoring device characterized by. 2. A first image memory for storing a digitized broadcast station signal, a signal storage means for delaying a signal read from the first image memory, and a signal obtained by receiving and demodulating a digitized broadcast wave. A second image memory that stores the signal, a difference between a signal read from the first image memory or an output signal of the signal accumulating unit and a signal read from the second image memory, and a difference signal is output. Signal comparing means, judging means for judging whether the output signal of the signal comparing means exceeds a predetermined allowable value, and outputting a broadcast content monitoring signal based on the judgment result, and broadcasting information of the broadcasting station. By inputting, signals are exchanged between the first image memory, the signal accumulating means, the second image memory, the signal comparing means and the judging means based on the on-air information. Broadcast content monitoring system characterized by comprising comprises a control and processing means for grasping the processing status of the control and circuit elements thereof circuitry. 3. A difference between a signal obtained by gradually delaying a signal of a broadcasting station and a signal obtained by receiving and demodulating a broadcast wave is obtained for each frame, and when the obtained difference falls within a predetermined allowable range, the difference is obtained. Measuring the time difference between a broadcast station signal and the broadcast wave, delaying the broadcast station audio signal by the time difference obtained by the measurement, and subtracting the delayed audio signal from the broadcast wave received and demodulated audio signal According to the above, the return voice generation device is configured to generate the return voice without the voice of the broadcasting station. 4. The return sound generating apparatus according to claim 3, wherein the sound signal of the broadcasting station is replaced with a sound signal of a relay vehicle.