JPS5810910B2 - how to get rid of it - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for automatically confirming broadcast facts.

Confirmation of broadcast fact refers to confirmation on the receiving side in order to confirm (monitor) on the broadcasting side whether or not a particular broadcast content, such as a commercial broadcast, was actually broadcast at a predetermined time. By discriminating the broadcast content to be broadcast, automatically recording the encoded data corresponding to the broadcast content, and analyzing the recorded data after the fact, it is possible to determine whether or not the above-mentioned broadcast has occurred, and the time of the broadcast. If you are trying to find out the defects, etc., but you want to do it automatically without doing it manually, it is necessary to identify the specific broadcast content to be checked as described above so that it can be distinguished from other broadcast content. Information (digital signals) must be transmitted to the receiving side during the actual broadcast of the broadcast content to be verified.

Traditionally, the confirmation of broadcast facts in television broadcasts uses digital electrical signals for identification.
White and black vertical stripes are applied to one frame of the projection film that records the specific broadcast content to be confirmed, and the combination of black and white stripes is used as a code to distinguish it from the signal received by the television receiver. There is a known system in which code information representing the content of the broadcast can be extracted by doing so.

By the way, it is extremely difficult to directly apply the black and white vertical stripes to the projection film, so they can be created by, for example, drawing them on a large piece of blank paper and then photographing and recording them on the projection film. Due to positional deviations, when the black and white vertical stripes accurately drawn on a blank sheet of paper are transferred to the projection film, they may deviate from the specified recording position, or the image pickup position or magnification may vary in the film feeding device that reads the stripes. When the black and white vertical stripes are caught on the receiving side, they may be shifted from the specified position in the raster, or may be deformed to a greater extent than the normal length and width.

Therefore, the conventional method of obtaining information for confirming the broadcast fact by simply detecting only black and white vertical stripes is difficult to do, no matter how high the accuracy of the detection device on the receiving side is. Because the black and white vertical stripes) have changed as described above, there is an extremely high risk that the desired code signal cannot be reliably detected or that it will be detected incorrectly.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide an automatic broadcasting fact checking method that can accurately check only the broadcasting facts of a specific target broadcasting content.

The invention will be explained in more detail below with reference to illustrated embodiments.

As shown in FIG. 1, a projection film CF, which is an example of a video information recording medium, has a video information recording track 1 in the center along the running direction (indicated by an arrow), and audio information is recorded on one side of the film. On the other side of the track 2, a band-shaped transparent part 4 in which perforations 3 are formed at equal intervals is provided.

Then, this projection film CF has confirmation of the broadcast fact in the frames 52 to 5n after the first frame 51 of the frames 5 to 5n formed into sections on the video information recording track 1. Specific video information to be used, for example "A" ~
The alphabet letter "Z" is optically recorded, and a special pattern signal is also optically recorded therein, which is characterized by automatic confirmation of the broadcast fact of the specific video information, using the first piece 5 mentioned above. are doing.

As shown in detail in Figure 2, the signal recorded on this first frame 51 is recorded within the safe zone SZ in which image transmission and reception are guaranteed in this range even under any adverse conditions on both the transmitting and receiving sides. It consists of multiple clock patterns x and addresses (ROW
ADDRES) and a code pattern 2 that specifies a code.

The feature of the present invention is that a clock pattern x for searching is created here, and it has a function as a sampling signal for extracting the address and code patterns y and z that are then scanned and transmitted. The subsequent pattern y is how the image is captured and transmitted on the transmitting side and detected on the receiving side.

This has a significant influence on the detection of z, and the clock pattern x used for its search is designed to particularly ensure its imaging and detection on the receiving side compared to the subsequent patterns y and z.

That is, the search clock pattern x has a constant width TA from a point a fixed length Ts away from the left edge of the frame 51 at the scanning speed, and a constant length B from the upper edge of the frame 51 (that is, one field).

It is constructed by recording the vertically elongated black belts 6 of the above required length B1 at regular intervals TB by Na (16 in this embodiment).

The space 78 between the black bands 6 is transparent or white.

In addition, the address pattern y is created by starting from a point a certain length Wl away from the Nr (4 in this embodiment) black belts on the left side among the Na black belts 6, with the horizontal black Assuming that rectangular sections with TA of the same width as the band 6 and a constant length of B2 are arranged in a predetermined row (7 rows in this embodiment) vertically spaced apart by a fixed interval W2, Nr sections are arranged in each row. (4 pieces)
For each section, each column is coded B, C, and D by changing the combination of black pattern or white pattern (or remaining transparent).

Incidentally, in this embodiment, the top row is 7 and the bottom row is 1.

Furthermore, code pattern 2 is the address pattern y
Immediately below the required black belts other than the black belt 6 provided directly below, there is a block in the same horizontal position as the rows of the address pattern y, the same number of rows, and the width of one section is the above TA, but the vertical width is Imagine a rectangular section that is longer than B2 by a predetermined length α, and decide which row of sections in that section will be the black pattern and which row will be the white pattern (transparent). It is constructed by determining the relationship with the above-mentioned specific video information to be confirmed recorded in the frames 52 to 5n of the projection film CF, and represents the code of the specific video information to be confirmed as a whole. .

The search clock pattern x, address pattern y, and code pattern 2 have the relationship described above, and in order to record them in one frame of projection film, for example, write only the parts that should be black on a large blank sheet of paper. All you have to do is color the blank paper black and take a photograph of the blank paper.

The three types of patterns x, y, and z recorded in one frame (one field) in this way are captured and transmitted under the same conditions both in the case of image capture and transmission on the transmitting side and in the case of reception on the receiving side. Since it is transmitted and received, it is clear that the rate of change will be the same. Also, as shown in FIG. Therefore, there is a waveform in which there are Na clock pulses with a width TA and an interval TB in one horizontal scanning section H, which is at least B.

It is clear that the period will continue.

Next, by attaching it to a conventionally known television receiver, only the search clock pattern x having the above-mentioned relationship is detected on the receiving side, and the address pattern y and code pattern z are also detected on the premise of some detection. 4 and 5, a detailed explanation will be given of an automatic broadcasting fact checking apparatus which uses this information to obtain checking code information representing the code of specific video information sent after the broadcasting information.

FIG. 4 shows a clock pattern detection circuit x that detects the search clock pattern x to obtain clock pulses, and FIG. An address pattern detection circuit Y for detecting the address pattern and a code pattern detection circuit 2 for detecting the code pattern 2 based on the clock pulse and distributing the detection signal according to the signal from the detection circuit Y are shown.

First, to explain from the clock pattern detection circuit X shown in FIG. 10, the video signal is separated into a vertical synchronization signal and a horizontal synchronization signal, and the video signal is input to a black and white level determination circuit 11 including a level clamp circuit, and the horizontal synchronization signal is input to a counter 12. .

After being clamped, the video signal input to the black and white level determination circuit 11 is converted into a binary electrical signal (
The black level is HIGH and the white level is LOW).

Here, the black level is "H" and the white level is "L".
Therefore, for convenience of explanation, the H portion (black level) will be referred to as a mark and the L portion (white level) will be referred to as a space.

The binary electric signal from the judgment circuit 11 is sent to the mark counter 13.
M and a space counter 13s, the mark length and space length are counted respectively, and a parallel binary electric signal corresponding to the length is generated.After that, a little redundancy is given to TA and TB for the certain period of time. Only those having a length within a specified range are taken out, and a small amount of space existing in the mark section and a small amount of mark existing in the space section are absorbed and removed here.

The marks that have become parallel binary signals in the mark counter 13M are sorted into odd and even numbers by the odd/even ranking sorting circuit 14. The data are stored in the latch memory 15E, respectively.

The marks sorted in this way are compared by the comparator 16, and if there is an odd or even match, the mark comparator 16 outputs a pulse indicating a match. memory 15o,
This process is repeated every time new information is entered in 15E and old information is cleared.

That is, here, it is checked whether the width TA of the black belt 6, which is an element of the search clock pattern x, matches the pressure between adjacent ones during horizontal scanning. be.

Furthermore, the marks converted into parallel binary signals by the mark counter 13M are also input to the gate 17, which is configured to pass only the first mark after receiving the horizontal synchronization signal. The mark that has passed through, that is, the first mark in each horizontal scan, is sorted by the odd and even rank sorting circuit 18 in the same manner as described above, and is stored in the latch memories 19o and 19E so that it can be compared by the comparator 20. It has become.

Note that the odd/even rank selection circuit 14 specifically includes a register for temporarily holding data, a divider for dividing the data by a specific divisor (for example, 2), and a divider for determining the result. If there is a remainder after dividing the input data by the divisor, the input data is determined to be an odd number, and if there is no remainder, it is determined to be an even number. The even rank sorting circuit also has the same configuration.

That is, here, whether the mark with a length within the specified range that first appeared in the previous horizontal scan and the mark with the length within the same specified range that first appeared in the current horizontal scan match each other. It is possible to check.

The match signal from the comparator 20 is sent to the hold circuit 2.
1, it is held for a certain period of time.

The counter 12 is clocked by the horizontal synchronizing signal separated by the separation circuit 10, and
It is now reset at the mark (black level) that is output.

Therefore, this counter 12 counts the time from when the horizontal synchronizing signal is received to when the first mark is received for each horizontal synchronizing signal.

The above-mentioned time value counted by the counter 12 for each horizontal scan is sorted into odd number and even number by the odd number/even rank sorting circuit 22, and is stored in the latch memories 23o, 23o.
The data are stored in the memory and compared by the comparator 24.

That is, here, it is checked whether the black pattern located on the leftmost side in one plane is vertically continuous at the same horizontal scanning position, or in other words, whether it is continuous at the Ts time position. It is.

The match signal from the comparator 24 is sent to the hold circuit 2.
5, it is held for a certain period of time.

As mentioned above, the coincidence signal from the comparator 16, which is used to check whether the widths of adjacent marks in one horizontal scanning section match each other, is added to the counter 26. It is designed to count how many matching signals are returned during the test.

Then, the counted value is sorted into odd and even numbers by the odd and even rank sorting circuit 27, stored in the latch memories 280 and 28E, and compared by the comparator 29.

That is, here, it is determined whether the number of marks present in the previous horizontal scan and the number of marks present in the current horizontal scan match each other. It can be used to check whether or not they are continuous.

The match signal from the comparator 29 is sent to the hold circuit 3.
0, it is held for a certain period of time.

the comparator 29, which can check whether the number of marks between horizontal scans matches as described above;
Match signals from a comparator 20 that can check whether the widths of the first marks match and a comparator 24 that can check whether the positions of the first marks match are sent to hold circuits 30, 21, 25. The logical product is once held by the AND circuit 31 for each horizontal scan.

Furthermore, although omitted in the drawings, the width of the space (white level) from the space counter 13s is determined by a mechanism similar to the selection circuit 14, latch memories 15o, 15E, and comparator 16, and then the width of the space (white level) is determined by the gate. 17. With a mechanism similar to the sorting circuit 13, latch memories 190, 19E, and comparator 20, the initial space width after the establishment of the first mark can be compared between horizontal scans, and the sorting circuit 22, latch memory 23o, 23E
, the continuation is checked by a mechanism similar to that of the comparator 24, and the number can be checked by a mechanism similar to that of the selection circuit 27, latch memories 28o, 28E, and comparator 29; It is added to the AND circuit 31, and logical product is performed together with the mark.

Thus, when all the conditions for marks and spaces between horizontal scans are satisfied, the AND circuit 3
1 outputs a pulse representing the coincidence, and the pulse is counted by a preset counter 32, and the number corresponds to the Bo that the black belt 6 has a satisfactory length. When the preset value is exceeded, the counter 32 outputs a pulse indicating that the preset value has been exceeded.

That is, here, the number of horizontal scans set by the above-mentioned conditions for marks and spaces (above B).

(equivalent to) can be used to check whether or not you are continuously satisfied.

When the above is satisfied and the preset counter 32 outputs a pulse, the memory control circuit 33 is driven by the pulse, and the latch memories 15o, 23o
Data necessary to be stored, such as marks, widths of spaces, permutations, numbers, times relative to horizontal synchronization signals, etc., are stored in the memory 34.

Therefore, the clock pattern detection circuit X shown in FIG.
detects only images that are the same as or very similar to the search clock pattern x in which the black bands 6 have a specific arrangement and length as described above, and images of such patterns cannot be found in normal video information. Therefore, this detection circuit X stores data in the memory 34 only when the clock pattern x is received.

Next, the address pattern detection circuit Y (FIG. 5) that detects the address pattern y on the premise of detecting the clock pattern x as described above will be explained. 35
When the gate 35 is opened by a pulse from the preset counter 32, the signal passes through it.

Therefore, the binary electrical signal passes through the gate 35 after the clock pattern x is detected as described above.

W1 after clock pattern x as shown in FIG.
The range is white, and in order to detect it, the above gate 3
The binary electrical signal that has passed through 5 is input to the preset counter 36, which counts the length of the space (white level) for each horizontal scan. , the counter 36 outputs one pulse.

In other words, it can be said that the counter 36 detects only horizontal scanning lines whose entirety is at the white level.

Furthermore, the pulses from this counter 36 are counted by a preset counter 37, and the number of pulses is
When the number corresponds to pattern x) is read out.

This read data is converted into a binary electric signal by a decoder 39 (FIG. 4), and becomes a clock pulse having a mark width of TA and a space width of TB as shown in FIG.

These clock pulses are counted by the preset counter 40 shown in FIG. 5 by the number Nr (see FIG. 2) used as an address instruction, and when the clock pulses have been counted Nr, the gate 41 is closed by the output of the counter 40. Nr pieces of data pass through the gate 41 and are sequentially input to the mark comparator 42.

On the other hand, the binary electric signal that has passed through the gate 35 is inputted through the gate 43 to the mark comparator 42 which receives the clock pulse, thereby determining whether it is a mark (black) when each clock pulse arrives. space(
After that, the shift register 44 outputs Nr pits (the first black pattern is a sine pit) in parallel 2 in which black and white are bit units for each horizontal scan.
Leading electric signal (for example, in the case of the top row in Fig. 2, 1
．． 1.1=7).

Then, the parallel binary electric signals for each horizontal scan from the shift register 44 are sorted by an odd/even rank sorting circuit 45 into those related to odd-numbered horizontal scans and those related to even-numbered horizontal scans, latch memory 460
, 46E, and are compared by a comparator 47.

The coincidence signal from the comparator 47 is counted by a preset counter 49, and when the number corresponds to the vertical width B2 (see FIG. 2) of the black pattern constituting the address pattern y, that is, B2 time When the same parallel binary electric signal continues, a pulse is obtained from the counter 49, which causes the gate 50 to open, and the parallel 2 signal representing the address stored in the latch memory 46o is output.
The forward electric signal, that is, the address instruction signal passes through the gate 50 and enters the address selector 51 included in the code pattern detection circuit Z, so as to specify the address of the code signal, which will be described later.

In this way, one column of address pattern y is detected, but between that column, W2 is detected as shown in FIG.
The length of the space (white) of the binary electric signal passed through the gate 35 to detect this is counted by the preset counter 52 for each horizontal scan, and the length of the space (white) is counted by the preset counter 52 for each horizontal scan. Similar to the preset counter 36, when the entire horizontal scanning section is just a space, the counter 52 outputs a pulse, which is counted by the preset counter 53, and the number corresponds to the length of W2. When the number is reached, counter 5
The third pulse passes through the gate 54 and opens the gate 43, making it possible to detect the address pattern y of the next column.

The pulse from the preset counter 49 is input to the gate control circuit 55, so that the gate 54 opens after the regular address pattern y is detected, and closes otherwise.

Address pattern y is detected for each column as described above, and next, a code pattern detection circuit detects code pattern z under the control of the detected signal and the clock pulse. Z will be explained.

The pulse of the preset counter 49, which outputs a pulse every time the address pattern y of each column is detected, is as follows:
A gate 56 to which the binary electric signal passed through the gate 35 is applied is opened.

The above-mentioned binary electrical signal that has passed through this gate 56 (that is, after the detection of one column of address pattern y) is applied to a mark comparator 57 that receives clock pulses from the decoder 39, so that each clock pulse When it arrives, it is determined whether it is a mark (black) or a space (white), and then it is converted by a shift register 58 into a parallel binary electrical signal with black and white as bit units. .

Then, the parallel binary electrical signals from the shift register 58 for each horizontal scan are sorted into odd and even numbers by the odd and even rank sorting circuit 59, and are stored in the latch memories 600 and 60E, respectively, and are sent to the comparator 61.
can be compared by.

The coincidence signal from the comparator 61 is counted by the preset counter 62, and when the number corresponds to the α length which is the difference from the black pattern for address as shown in FIG. When the same parallel binary electric signal continues for α time, a pulse is changed by the counter 62, the gate 63 is opened by the pulse, and the parallel binary electric signal stored in the latch memory 60o passes through the gate 63 to the address selector 51. can be added to.

The pulse from the preset counter 62 is also applied to the gate control circuit 55 to close the gate 38.

The code pattern z of each column is detected as described above, but as mentioned above, the address selector 51
Under the control of the detected address pattern y (address instruction signal), each column is sequentially designated and stored in the dedicated latch memory 64.

The data stored in these latch memories 64 is read out at an appropriate time, recorded in code on an external recording medium such as a perforated tape or magnetic tape, and the recorded information is analyzed afterwards. This makes it possible to confirm whether the specific video information recorded on the projection film CF was actually broadcast.

In the above embodiment, the three types of patterns were recorded on one frame using almost the entire area, but they may be recorded on a portion of the frame, or may be recorded on a plurality of frames.

Further, if the information recorded on the projection film CF recorded as described above is reproduced and recorded on a magnetic tape, the same operation as described above can be performed using the magnetic tape.

Furthermore, although the binarization was performed using black and white as units, in the case of color broadcasting, the binarization may be performed using other colors.

As is clear from the above description, the method for automatically confirming broadcasting facts of the present invention uses a plurality of clocks for retrieval in any one field of a video information recording medium such as a projection film or magnetic tape in which specific video information is recorded. pattern and
The code of the specific video information mentioned above is recorded in a predetermined positional relationship with the code pattern that specifies the code, and while the specific video information, clock pattern, and code pattern are transmitted by the television transmitter, the television receiver Create a clock signal by detecting a signal related to the clock pattern from among the received signals received by the machine,
Code information representing the code of the specific video information is obtained by searching the signal related to the code pattern using the clock signal, and the code pattern is searched based on the detection of the clock pattern. In addition, since both of these patterns are recorded in the same field so that the rate of variation is the same, it is possible to accurately confirm the broadcast fact.

Further, in addition to the above, the method of the present invention according to claim 2 further records an address pattern for specifying the address of the code pattern in the same field, and also retrieves it on the premise of detecting a clock pattern. At the same time, the code information can be addressed by searching the code pattern, making it possible to accurately check a large number of broadcast contents using the same device without changing the broadcast fact checking device on the receiving side. It is something that can be done.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially omitted plan view of a projection film, FIG. 2 is an enlarged plan view of one of the frames of the projection film, and FIG. 3 is a plan view of the projection film. is the second
The waveform diagram of the electric signal obtained by scanning the search clock pattern recorded on the frame shown in the figure, Figures 4 and 5 show the block diagram of the automatic broadcast fact confirmation device, and Figure 4 shows the clock in it. FIG. 5 shows an address pattern detection circuit and a code pattern detection circuit. CF...Projection film, x...Clock pattern for search, z...Code pattern,
y...address pattern, TV...television receiver.

Claims (1)

[Scope of Claims] 1. A plurality of clock patterns for retrieval and a code of the specific video information are stored in any one field of a video information recording medium such as a projection film or magnetic tape on which specific video information is recorded. The code pattern to be specified is recorded in a predetermined positional relationship, and while the specific video information, clock pattern, and code pattern are transmitted by the television transmitter, the information in the received signal received by the television receiver is A clock signal is generated by detecting a signal related to the clock pattern from the above, and code information representing the code of the specific video information is obtained by searching for a signal related to the code pattern using the clock signal. A method for automatically confirming broadcast facts. 2. In any one field of a video information recording medium such as a projection film or magnetic tape on which specific video information is recorded, a plurality of clock patterns for searching and a code pattern that specifies the code of the specific video information; This code pattern and an address pattern indicating the address are recorded in a predetermined positional relationship, and these specific video information, clock pattern, code pattern, and address pattern are transmitted by a television transmitter. A clock signal is generated by detecting a signal related to the clock pattern from among the received signals received by the receiver, and a code related to the specific video information is detected by searching for a signal related to the code pattern using the clock signal. The broadcasting fact is characterized in that the code information representing the address pattern is obtained, and an address instruction signal is obtained by similarly searching for a signal related to the address pattern using a clock signal, and the address of the code information is specified by this address instruction signal. Automatic confirmation method.