JPS596096B2 - Timer correction method in broadcast confirmation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a broadcast confirmation system that detects the broadcast time of a commercial broadcast signal using a timer or the like and records it, and uses a time commercial to correct an error in the reception time timer. This paper relates to a timer correction method in a commercial confirmation system.

Currently, various commercial broadcasts are being broadcast, and in order to confirm whether the commercial broadcasts are being carried out according to the contract, the time and number of commercial broadcasts are recorded.

By the way, since commercial broadcasts are played on a second-by-second basis and the interest rates vary depending on the time slot, there must be no discrepancy in the reception time timer that confirms the time when commercial broadcasts are broadcast. As a way to correct the timer error,
Possible methods include using a timer with less deviation or having maintenance personnel periodically maintain and inspect the timer, but the former method has the disadvantage of increasing the cost of the timer, and the latter method prevents adjustment errors. It has drawbacks such as the possibility that it may occur. Based on the above consideration, the present invention aims to prevent timer adjustment errors, etc., and therefore corrects the reception time timer that confirms the time when a commercial is broadcast using the time commercial. This invention provides a timer correction method for a commercial broadcast confirmation system.

Therefore, in the timer correction method in the broadcast confirmation system of the present invention, an identification signal corresponding to the content of the broadcast signal is superimposed on a broadcast signal and then broadcast, and a receiving device receives the broadcast signal and detects the identification signal. , a broadcast confirmation system in which a detection time indicated by a reception time timer and the detection identification signal are sent to a center, and the center records broadcast content and broadcast time based on the identification signal and the detection time. If the broadcast content corresponding to the identification signal sent from the receiving device is a time commercial, the time at which the identification signal of the time commercial should be detected and the time when the receiving device actually sets the timer for the receiving time is determined. Therefore, the difference from the detected time is set as the time correction value,
The present invention is characterized in that, when the broadcast content is not a time commercial, the detected time sent from the receiving device is corrected using the time correction value and set as the broadcast time. Hereinafter, the present invention will be explained with reference to the drawings.

Figure 1 is a diagram explaining the outline of the T-commercial broadcast confirmation system, Figure 2 is a block diagram of the information signal superimposition circuit, and Figure 3 is a block diagram of the information signal superimposition circuit.
Figure 4 is a block diagram of the signal receiving circuit, Figure 4 is a diagram explaining the commercial discrimination signal and commercial identification signal, and Figure 5 is a diagram showing the relationship between the screen start time in the time commercial, the reception time timer registration time, and the time signal time. , FIG. 6 is a flow chart showing time data correction processing on the center side. In Fig. 1, 1 is a TV station, 2 is a sponsor, 3 is an agency, 4 and 5 are antennas, 6 is a TV tuner, 7 is a signal detection section, 8 is a memory, 9 is a reception time timer, and 10 is a center. are shown respectively.

When creating a commercial, the sponsor 2 requests the agency 3 to create the commercial. Sponsor 2 is a commercial film or VTRCM created by agency 3.
5-T station 1 and requests commercial broadcasting. At this time, the sponsor 2 makes a contract with the TV station 1 regarding interest rate, time, frequency, etc. The antenna 5, the TV tuner 6, the signal detector 7, the memory 8, the reception time timer 9, etc. constitute the commercial broadcast confirmation reception equipment.
A commercial broadcast broadcast from station 1 is received, and the type of commercial broadcast, broadcast time, etc. are recorded in memory 8. The center 10 periodically reads the data in the memory 8, compares the read data with the broadcast schedule provided in advance by the sponsor 2, and checks whether the commercial broadcast is being performed as scheduled. A commercial identification signal of a commercial broadcast and a commercial discrimination signal indicating that the signal is a commercial identification signal are superimposed on the audio band and broadcast.

FIG. 2 shows an information superimposition circuit that superimposes a commercial discrimination signal and a commercial identification signal on audio, in which 11 is a magnetic tape device for reproduction, 12 is a magnetic tape device for recording, 13 and 14 are preamplifiers, and 15 are magnetic tape devices for recording. 1 to 17 are oscillators, 18 is a rectifying and smoothing section, 19 to 21 are switches, 22 is a high-pass filter, 23 to 25 are band-pass filters, 26 is a mixer, and 27 is a write amplifier, respectively. The audio of the commercial broadcast is recorded on the magnetic tape for reproduction, and a synchronizing sound that occurs after a certain period of time from the start of the screen is recorded in advance. The reproduced synchronous sound is sent to a synchronous sound detection section (not shown) through a preamplifier 13 and a rectification/smoothing section 18. When a synchronous sound is detected, a digital code commercial discrimination signal and a commercial identification signal are modulated and superimposed on the commercial sound. Oscillator 15, 16, 1
7 is F. , fl, f2. The 0th bit of digital information is frequency F. The first bit is modulated at frequency f1 and the second bit is modulated at frequency F2. The modulated digital information is sent to mixer 26. A high-pass filter 22 removes the low frequency portion of the audio signal sent from the magnetic tape for reproduction, and a mixer 26 superimposes modulated digital information on the low frequency portion. Commercial audio signals with digital information superimposed on them are recorded on recording magnetic tape.
The contents of the recording magnetic tape are then broadcast. Figure 3 shows the signal receiving circuit in the commercial broadcast confirmation receiving equipment, where 28 is an attenuator, 29 is a low-pass receiver, and 29 is a low-pass receiver.
30 is a preamplifier, 31 to 33 are breadth filters, 34 to 36 are rectifier and smoothing circuits, 37
39 to 39 are binarization circuits, 40 is a sampling timer, and 41 is a microprocessor, respectively.

The broadcasted audio signal is transmitted through tuner 6, attenuator 28,
The signal is input to bandpass filters 31, 32, and 33 through a low-pass filter 29 and a preamplifier. The bandpass filter 31 has a frequency F. Extract the signal of
The bandpass filter 32 extracts the signal of frequency F, and the bandpass filter 33 extracts the signal of frequency F2. The signals extracted by the bandpass filters 31, 32, 33 are smoothed by rectifying and smoothing circuits 34, 35, 36, and converted into digital signals by binarization circuits 37, 38, 39. FIG. 4 shows a commercial discrimination signal and a commercial identification signal to be broadcast, and channels CH, , CH2, and CH3 have a frequency of F. , fl, f2 communication! It shows the path. The commercial discrimination signal is a signal with a fixed pattern, and although not shown, a fixed pattern is prepared in the commercial broadcast confirmation receiving equipment. Binarization circuits 37, 38, 39 are used to check whether or not a commercial discrimination signal has been sent.
1 is sampled by the sampling timer 20. 2
Three shift registers R1, R2, and R3 (not shown) are provided corresponding to the digitization circuits 37, 38, and 39, respectively, and the sample value of the output of the binarization circuit 37 is shifted into the shift register R. The sample value output from the binarization circuit 38 is shifted into the shift register R2, and the sample value output from the binarization circuit 39 is shifted into the shift register R3.

The patterns of shift registers R, , R2, and R3 are compared with the fixed pattern of the commercial discrimination signal registered in advance. When the Hamming distance between the two patterns becomes the minimum, it is assumed that the commercial broadcast has started and is received. The timer value of the timer 9 is written into the memory 8, and then the commercial identification signal sent subsequently is written into the memory 8.
The commercial identification signal is a signal that identifies a commercial. FIG. 5 shows the relationship between the screen start time, reception time timer registration time, and time signal time in a time commercial.

As mentioned earlier, when a synchronizing sound is detected, the commercial discrimination signal and the commercial identification signal are superimposed and recorded on the recording magnetic tape. The time TO from the start of the screen to the detection of the synchronized sound is constant, and is generally 2 seconds. Assuming that the time of the time commercial is 15 seconds and that the time commercial indicates 19:00, if the reception time timer is correct, 18:59:47 should be registered in the memory 8. However, if the time registered in the memory 8 indicates 18:59:50, the reception time timer 9 is 3 seconds ahead of the correct time. Although it is assumed that the time commercial indicates the correct time, the time indicated by the time commercial indicates the correct time in most cases. The contents of memory 8 are periodically collected by sensor 10.

FIG. 6 shows the time data correction process in the sensor 10. As mentioned earlier, the sensor 10 is provided with broadcast schedules in advance from each sponsor. When collecting data, the center 10 calls the commercial broadcast confirmation receiving equipment and requests data transfer. The received data and time data that have been sent are stored in the memory of the sensor 10. The sensor 10 sequentially reads out the commercial identification signal and checks whether it is a time commercial. If it is a time commercial, calculate the time data correction amount,
This time data correction amount is stored. In the case of a general commercial rather than a time commercial, the time data is corrected using the calculated time data correction amount, and this result is stored. As is clear from the above description, according to the present invention,
Since the reception time timer is corrected using the time commercial, there is no need to use an expensive reception time timer, and there is no need for maintenance personnel to adjust the reception time timer. You can obtain effective effects. In the above description, the case where the time information is superimposed only on the broadcast signal of the time commercial has been explained, but it is clear that only the time information may be transmitted during the broadcast of the program.

[Brief explanation of the drawing]

Figure 1 is a diagram explaining the outline of the T-commercial broadcast confirmation system. Figure 2 is a block diagram of the information superimposition circuit, Figure 3 is a block diagram of the signal receiving circuit, and Figure 4 is the common discrimination signal and commercial identification signal. FIG. 5 is a diagram showing the relationship between the screen start time, reception time timer registration time, and time signal time in the time commercial, and FIG. 6 is a flowchart showing time data correction processing on the center side. 1...TV station, 2...Sponsor, 3.
...Agent, 4 and 5...Antenna, 6.
...TV tuner, 7...signal detection area
8...Memory, 9...Timer for reception time, 10...Center, 11...Magnetic tape device for reproduction, 12... Recording magnetic tape device, 13 and 14... Preamplifier, 15 to 17... Oscillator, 18... Rectification and smoothing section, 19 to 21... Switch, 22...
...High bass filter, 23 to 25...
・Band pass filter, 26 toss, 27...
・Write amplifier - 28... Atsushi, 29...
...Low pass filter, 30...ramp, 31
or 33...Pandopas evening, 34 or 3
6... Rectifier and smoothing circuit, 37 to 39...
...A/D converter, 40...Sampling timer, 41...Microprocessor.

Claims (1)

[Claims] 1. A broadcast signal is superimposed with an identification signal corresponding to the content of the broadcast signal, and a receiving device receives the broadcast signal and detects the identification signal, and detects the detection time indicated by the reception time timer and the detection. In the broadcast confirmation system, the center sends an identification signal to a center, and the center records the broadcast content and broadcast time based on the identification signal and the detection time. If the corresponding broadcast content is a time commercial, the time correction value is the difference between the time when the identification signal of the time commercial should be detected and the time actually detected by the reception time timer in the receiving device. A timer correction in a broadcast confirmation system, characterized in that, when the broadcast content is not a time commercial, the detected time sent from the receiving device is corrected by the time correction value and set as the broadcast time. method.