JPS596097B2 - Broadcast identification signal display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a broadcast identification signal display method for receiving a broadcast identification signal such as a commercial (C''), and displaying and monitoring the reception status of a plurality of frequency channels based on the contents.

Recently, with the spread of commercial broadcasts, commercial broadcast confirmation systems have been developed and put into practical use.

The CM broadcast confirmation system is a system whose purpose is to automatically confirm whether or not commercial TV broadcasts by private TV stations have been carried out in accordance with the contract with Subongsa, and to output the confirmation results. In this system, in order to confirm the commercial broadcast, a commercial confirmation signal is inserted in advance into the audio band of the produced commercial, and the commercial confirmation signal is detected from the TV broadcast commercial and sent to a central computer. Check with the contents of the broadcasting contract.

FIG. 1 is a conceptual diagram of a CM broadcast confirmation system, in which each component is shown as a block, and the flow of data between them is shown as a solid line.

To explain the process of broadcast confirmation based on this diagram, (1) Confirmation requester 2 sends request form 1 to broadcast confirmation company 1 based on application form and schedule 1.
to request broadcast confirmation.

(2) On the other hand, the computer center 4 generates a CM confirmation signal and the corresponding CMA 6 in advance, and
Send it to the writing device 3 in 0 using the writing device input paper tape 2.

(3) The broadcast confirmation company 10 puts the dubbing masser tape (CM audio tape) 3 brought in by the confirmation requester 2 into the writing device 3, specifies CM consideration, and writes the corresponding CM confirmation signal for broadcast confirmation. Tape 4 is produced and returned to confirmation requester 2 together with the dubbing mother tape, and commercial considerations are also notified.

Also, the actually used CM and CM confirmation signal are sent to the computer center 4 using the writing device output paper tape 5. (4) The computer center 4 creates a file from the application form and schedule from the confirmation requester 2, the commercials actually used, and the commercial confirmation signal. (5) On the other hand, confirmation requester 2 is confirmed by confirmation company 1.
Using the broadcast confirmation audio tape 4 received from 0, a CM film/VTRCM 6 is produced and a request is made to T station 1 for broadcasting.

As a result, the schedule 7 is finalized and sent to the computer center 4. (6) The receiving device 5 is installed corresponding to each T station,
During the broadcast time period, the CM broadcast radio waves 8 are always received, the CM confirmation signal and the reception time are stored, and the CM confirmation signal 9 including the reception time is transmitted to the computer center 4 over the late night public line.

(7) The computer center 4 compares the CM confirmation signal 9 from the receiving device 5 with the CM confirmation signal in the file, and
A confirmation table [phase] is created using /F6 and the reception time and provided to the confirmation requester 2.

In this way, the CM broadcast is confirmed. The functions of the CM confirmation signal in this case are, firstly, that it can be completely distinguished from the voice and noise in general audio signals, and secondly, that it has sufficient identification information to identify the broadcast content, etc. CM
The confirmation signal requires a considerable length of information bits.

If the receiving side were to match all of the information bits in response to each audio signal, the amount of processing would increase and the configuration would become complicated.In order to simplify this in a separate application, the discrimination signal of the first function is set at the beginning. This is the first step to sorting and efficient processing. In addition, it is necessary that the CM confirmation signal be inaudible to the human ear, or the insertion band should be limited to a low frequency region of approximately 100 Hz or less, and an effective discrimination function should be developed according to the characteristics of this low frequency region. The combination of digital signals of multiple frequencies was considered to achieve the desired effect. Furthermore, the identification information following the discrimination signal uses a combination of digital signals of a plurality of frequencies in the low frequency region, similarly to the discrimination signal. In this case, for example, if each 16-bit code length is used in three frequencies, the code combination is 23><16=
248, and can accommodate a huge amount of information with sufficient redundancy. However, in this system, there is a high probability that errors will occur due to waveform distortion such as cross-modulation distortion between three frequencies in addition to noise. On the other hand, since the target CM identification information is selected from pre-stored information, the distances between the received CM identification information and each digital signal of the pre-stored information are combined and the smallest one is received. It is determined that FIG. 2 shows an example of a CM confirmation signal.

That is, a discrimination signal and identification information are formed by a combination of the three low frequencies Fl, f2, and f3 shown in FIG. The identification information of the present invention is set so that only one frequency is turned on at a time. Such a broadcast confirmation system has sufficient redundancy and error checking and matching? Although good identification is carried out by comparison with information, etc., however, these are processed within the center and only the results are reported to the confirmation requester. In this case, there is a possibility that it will take time to deal with the occurrence of an unidentifiable state. Therefore, it is desirable to constantly monitor the receiving state of the CM identification information with a receiving device, to detect a receiving state in which a large number of error bits occur early, and to take precautionary measures to improve the receiving state. SUMMARY OF THE INVENTION The present invention relates to a broadcast identification signal display method for receiving identification information such as CM broadcasts, and displaying and monitoring the reception status of a plurality of frequency channels based on the content of the identification information.

In order to achieve the above object, the broadcast identification signal display method of the present invention transmits a discrimination signal corresponding to a specific broadcast superimposed on a broadcast audio band and an identification signal following the discrimination signal from a transmitting side to a receiving side, In a broadcast identification method in which the receiving side confirms that it is a specific broadcast by detecting the discrimination signal, and further identifies the content of the specific broadcast by detecting the identification signal, the receiving side receives the identification signal. A display means for displaying the identification signal and an adjustment means for adjusting the detection state of the identification signal are provided, and the sending side creates the identification signal in accordance with a predetermined regulation so as to be able to detect errors, and the receiving side generates the identification signal for the sent identification signal. The present invention is characterized in that the identification signal is displayed on the display means so that the error detection state can be determined.

The present invention will be described in detail below with reference to examples.

FIG. 3 shows an example of a monitoring panel in a signal detecting section used in the receiving apparatus of the present invention.

In the central soil part of the panel 20 in the same figure, there is C.
A reception data display section 11 for the M identification signal is provided, a TV channel setting switch and display section 12 are provided at the bottom center, a signal selection switch, a signal level meter, and a reception level adjustment dial 13 are placed on the left side, and each frequency channel is displayed on the right side. (
There are analog output and digital output lamp displays 14 for CH1 to CH4), and an alarm and a digital output on the upper right side.
A lamp display 15 for mode, buzzer, etc. is arranged. As mentioned above, the received data display section 11 for the CM identification signal has a total of 16
Identification bit consists of 10 bits and 6 test bits, and each bit indicates whether the reception level of the three low frequencies F, ~F3 is on or off, expressed as numbers 0 to 7 as shown in Table 1 below. let

As shown in Figure 2b, if the identification information is set so that only one frequency is turned on at the same time for each bit, the displayed number will be 1.
, 2°, and 3 indicate a correct reception state, and other cases indicate an error signal due to noise or the like.

As mentioned above, it has a function that can identify even if a small number of erroneous rebits occur, but if the number of erroneous rebits approaches a dangerous number as a result of monitoring, the reception level must be adjusted before it becomes impossible to identify them. preventive measures can be taken. FIG. 4 is an explanatory diagram showing the configuration of an embodiment of the present invention according to the above-described principle. The CM confirmation signal is provided with a discrimination signal at the beginning, followed by the aforementioned 16-bit identification signal, forming combination information of three frequencies f1 to F3 of 100 Bz or less.

In the same figure, a TV channel signal set by a tuner 22 is extracted from a broadcast signal inputted from an antenna 21, and the extracted TV channel signal is input to a signal detection circuit 23 to detect three low frequencies f1 to F3 in the audio signal.

First, the discrimination signal detection circuit 25 detects the discrimination signal shown in FIG. The contents of the register 28 and the display 31 that have been stored are reset. Next, the CM identification signal detection circuit 24 detects the identification signal shown in FIG.
The detected combination of frequencies f1 to F3 is compared with the contents of the signal conversion table 26 in which the first table is stored, and the displayed numerical data is stored in the register 28 for each bit. On the other hand, the address of the counter 27 corresponding to each bit of the identification signal is given to the gate 29 to open the gate, and the data of the display number stored in the register 28 is displayed on the display 31 via the decoder 30. This display 31 corresponds to the received data display section 11 in the monitoring panel 20 in FIG. This display on the display 31 continues until the next CM broadcast discrimination signal is confirmed. Note that it may be possible to automatically determine that the number of error signals in the display exceeds a predetermined number and to sound a buzzer or the like. As explained above, according to the present invention, the identification signal of a CM broadcast is received, the reception status of multiple frequency channels is monitored by displaying the code as a code, and preventive measures are taken before the identification signal becomes unidentifiable based on the reception status. Since it is possible to take appropriate measures, it is useful for effectively reducing the error rate in the CM broadcast confirmation system.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of the CM broadcast confirmation system, Figure 2 A, b
3 is an explanatory diagram of an example of an identification signal waveform used in the present invention, FIG. 3 is an explanatory diagram of a monitoring panel in an embodiment of the present invention, and FIG. 4 is an explanatory diagram showing the configuration of an embodiment of the present invention. Medium, 5
1 is a receiving device, 11 is a received data display unit, 20 is a monitoring panel, 21 is an antenna, 22 is a tuner, 23 is a signal detection circuit, 24 is a CM identification signal detection circuit, 25 is a discrimination signal detection circuit, and 26 is a signal conversion table. , 27 is a counter, 2
8 is a register, 29 is a gate, 30 is a decoder, and 31 is a display.

Claims (1)

[Claims] 1. A discrimination signal corresponding to a specific broadcast superimposed on the broadcast audio band and an identification signal following the discrimination signal are transmitted from the transmitting side to the receiving side, and the receiving side detects the discrimination signal to identify the specific broadcast. In a broadcast identification method that identifies the content of the specific broadcast by confirming that the identification signal is correct, and further detecting the identification signal, the display means for displaying the identification signal on the receiving side and the detection state of the identification signal are adjusted. Further, on the transmitting side, the identification signal is created in accordance with a predetermined regulation so that an error can be detected, and on the receiving side, the transmitted identification signal is displayed on the display means so that an error detection state can be determined. A broadcast identification signal display method characterized by displaying.