JPS5810909B2 - Eizojiyouhouno Sakushiyutsukakuninhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides that when specific video information recorded on a video information recording medium such as a projection film or magnetic tape is read out and transmitted, the specific video information is Automatically identify the video information and search for it, or automatically check what kind of content that particular video information is, and whether or not it was actually transmitted and was caught by the receiving party. The present invention relates to a method for visually searching and confirming video information.

An example of a system that performs this type of information retrieval/confirmation is an automatic broadcast fact confirmation system that automatically confirms broadcast facts in television broadcasts.

Confirmation of broadcasting fact is a method for checking (monitoring) on the receiving 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 and 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 is true, and whether there are any flaws in the broadcast. etc., but if you want to do it to the target without artificially, it is necessary to make sure that the specific broadcast content you are trying to check is distinguishable from other broadcast content, and that there is no way to identify it. 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 be distinguished 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 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 by the receiving side, the black and white vertical stripes 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 because the accuracy of the detection device on the receiving side is high, but the digital signal ( Because the black and white vertical stripes have changed as described above, there is an extremely high risk that the desired digital electrical signal cannot be detected reliably or that it is detected incorrectly.

Therefore, the present invention provides a method for retrieving and confirming video information that can accurately detect a signal for purposeful identification and that has extremely low risk of false detection when automatically confirming the fact of broadcasting as described above. This is what we are trying to provide.

EMBODIMENT OF THE INVENTION Below, the present invention will be described in detail with reference to the drawings regarding an embodiment in which the present invention is applied to a broadcast fact automatic confirmation system in television broadcasting.

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

Then, this projection film OF 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 for example “A” ~
The alphabet letter "Z" is optically recorded, and a special pattern signal is also optically recorded therein using the first piece 51, which is characterized by automatic confirmation of the broadcast fact of the specific video information. ing.

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 uses multiple clock patterns X and addresses (ROW
ADDRES) multiple address patterns y
and a code pattern Z that specifies the code.

A feature of the present invention is that a search clock pattern 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 effect on the detection of z, and the clock pattern x for its search is the later pattern y.

In particular, compared to Z, the imaging and detection on the receiving side can be performed more reliably.

In other words, the clock pattern x for searching is -1 width TA and from a point a fixed length Ts away from the left end of the frame 51 at the scanning speed, and also for the frame 51 (i.e., 1 field).
A certain length B from the upper end of.

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 18 between the black bands 6 is transparent or white.

In addition, the address pattern y is arranged so that the horizontal direction starts right below each of the Nr (four in this example) black belts on the left side of the Na black belts 6, and is separated by a certain length W1 from the black belts 6. Square sections of TA with the same width as the black belt 6 and B2 of constant length are arranged in a predetermined row (in this example, 7
(column), and by changing the combination of black pattern or white pattern (or remaining transparent) for Nr (4) sections in each column, each column is It is coded B, C, and D.

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

Furthermore, the code pattern is arranged directly below the required black belts other than the black belt 6 provided directly below the address pattern y.
Imagine a rectangular section with the same horizontal position and the same number of rows as the rows of address pattern y, and the width of one section is TA above, but the vertical width is longer than B2 above by a predetermined length α. Then, confirm which row of the sections should be the black pattern and which row should be the white pattern (transparent), as described above, recorded in frames 52 to 5n of the projection film OF. It is constructed by determining the relationship with specific video information, 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.

As shown in FIG. 3, the electric signal from the first horizontal scan of the frame 51 is a clock pulse having a width of TA and an interval of TB from a point Ts time away from the horizontal synchronizing signal 7 for one horizontal scanning period H. There are Na waveforms in , and this 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 on the premise of this detection, the address pattern y and the code pattern 2 are detected. , and thereby obtain confirmation code information representing the code of specific video information sent after the broadcast information.The automatic broadcast fact confirmation apparatus will now be described in detail with reference to FIGS. 4 and 5.

FIG. 4 generally 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 HIGH1 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 two electric signals from the judgment circuit 11 are 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 on the side.

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.

The marks thus distributed are compared by a comparator 16, and if there is an odd or even match, a pulse indicating a match is outputted from the strike comparator 16. 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 widths TA of the black bands 6, which are elements of the search clock pattern X, are the same between adjacent ones during one horizontal scan.

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.

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 set by the horizontal synchronizing signal separated by the separation circuit 10, and is set by the horizontal synchronization signal separated by the separation circuit 10.
The mark (black level) that is output from the black level is reset.

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 and even rank sorting circuit 22, and is stored in the latch memories 23o and 23E.
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 of one screen is continuous vertically at the same horizontal scanning position, or in other words, whether it is continuous at the Ts time position. be.

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. The number of matching signals obtained during the interval is counted.

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. This allows you to check whether the marks 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, and 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 18, latch memories 19o, 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 is the number that agrees with the Bo that the black belt 6 has set to a satisfactory length. When it is picked up, 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 exactly the same as or very similar to the search clock pattern First of all, it can be considered that there is no such thing, so 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) which 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 gray 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 the 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 N1 (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. Only N1 passes through the gate 41 and is 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 transfers Nr bits (the first black pattern is a sign bit) 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 46o
, 46E, and are compared by a comparator 47 to form a comparison.

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, the time B2 is reached. When the same parallel binary electric signal continues, a pulse is changed by the counter 49, and the gate 50 is opened by the pulse, and the parallel 2 electric signal representing the address stored in the latch memory 46o is changed.
The forward electrical signal passes through the gate 50 and enters an address selector 51 included in the code pattern detection circuit Z to designate 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 that has passed through the gate 35 to detect the white signal is counted by the preset counter 52 for each horizontal scan. Similar to the preset counter 36, when almost the entire horizontal scanning section is space only, a pulse is output from the counter 52, and the pulse is counted by the preset counter 53, and the number is added to the W2 length. When the corresponding number is reached, the pulse of the counter 53 passes through the gate 54 and opens said 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.

The address pattern y is detected for each column as described above, and next, a code pattern detection circuit detects the code pattern 2 under the control of the detected signal and the clock pulse. 2 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 obtained from the counter 62, and 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.

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
Controlled by the detected address pattern y, the dedicated latch memory 64 is sequentially connected to each column.
It will be stored in...

However, these latch memories 64...
・By reading the data stored in - at an appropriate time, recording it in code on an external recording medium such as perforated tape or magnetic tape, and analyzing the recorded information after the fact,
It is possible to confirm whether or not specific video information recorded on the projection film OF was actually broadcast.

In the above embodiment, three types of patterns were recorded on one piece using almost the entire area, but they may also be recorded on a part of the piece.
, and the address and code patterns y and z may be recorded in mutually different frames.

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

Furthermore, if the number of codes to be checked is small, address pattern y is not necessarily necessary.

Furthermore, in the above, a specific arrangement of black and white patterns was intentionally created as the code pattern z, but the specific video information itself to be confirmed is regarded as the code pattern, in other words, it is The broadcast fact may be confirmed by performing segmentation (in pattern recognition) of the specific video information.

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

Furthermore, although the present invention has been explained above using the confirmation of broadcasting facts as an example, by detecting the patterns x, y, and z as described above, it is possible to transmit only specific video information recorded on the projection film OF. Alternatively, the present invention can also be applied to the case where the image information is retrieved from other video information when reading the image information.

As is clear from the above description, the present invention provides a method for recording a plurality of clock patterns for retrieval at regular intervals 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. At the same time, in the same or different fields, multiple patterns for codes representing a specific code as a whole are recorded at regular intervals in the same way as the clock pattern above, and these patterns can be used to specify A transmitter transmits video information, a clock pattern, and a code pattern, and a receiver receives the video information, and generates a clock signal by detecting signals related to the plurality of clock patterns from among the received signals. By searching for signals related to the plurality of patterns for the code using the clock signal, code information for checking the content of the specific video information, etc. is obtained. Only video information can be detected accurately without false detection.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a broadcast fact confirmation system. Fig. 1 is a partially omitted plan view of a projection film, and Fig. 2 is an enlarged view of one of the frames of the projection film. Its plan view, Figure 3 is a waveform diagram of the electrical signal obtained by scanning the search clock pattern recorded on the frame shown in Figure 2, and Figures 4 and 5 are block diagrams of the automatic broadcast fact confirmation device. 4 shows a clock pattern detection circuit therein, and FIG. 5 shows an address pattern detection circuit and a code pattern detection circuit. OF...Projection film, x...Clock pattern for search, z..."...Code pattern.

Claims (1)

[Claims] 1 Multiple clock patterns for retrieval are recorded at regular intervals in any one field of a video information recording medium such as a projection film or magnetic tape that records specific video information, and the same or A plurality of code patterns representing a specific code as a whole are recorded at regular intervals in different fields, and these specific video information, clock patterns, and code patterns are transmitted. A clock signal is generated by detecting a signal related to the plurality of clock patterns from among the received signals, and a clock signal is generated from the plurality of patterns for the code using the clock signal. A method for searching and confirming video information, characterized in that code information for confirming the content of the specific video information is obtained by searching such a signal.