JPH09284667A - Subliminal video processor, television receiver and magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a subliminal image and also to issue alarm indicating its existence by judging the subliminal image in a normal video signal. SOLUTION: Image data (luminance signal) for the portion of one screen of the latest input which is separated into an odd-number/even-number fields by an odd-number/even-number field separating part 71 is simultaneously compared with image data of a previous input which is stored in the frame memories 61-6n of one screen before to n-number screen before by a comparator 72. When data for the portion of latest one screen is different from previously inputted image data based on the comparison result, a different screen judgement processing part 73 judges the different screen and inputs the judgement result to first RAM 74. A subliminal video judging processing part 75 judges that the different screen being equal to below n-number frames to be the subliminal image by the different screen judgement result of first RAM 74, a subliminal image removal processing part 78 receives the judgement and turns off a switch 81 so as to permit the video screen not to be outputted and a subliminal video alarm processing part 76 issues the existence alarm of the subliminal image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subliminal image processing apparatus which removes a subliminal image from the video signal or judges a subliminal image of the video signal to warn the existence of the subliminal image, and the subliminal image processing device. The present invention relates to a television receiver and a magnetic recording / reproducing apparatus which can be equipped with a device to protect a viewer from the adverse effects of subliminal images.

[0002]

2. Description of the Related Art Conventionally, various circuits have been developed for circuits for analogically or digitally removing various noises contained in a video signal, but in a normal video signal such as news or drama, At present, no device has been developed that removes subliminal images that are appealing to the subconscious of the viewer due to the disparity of several frames. This subliminal video is a video technique that can affect the subconsciousness of the viewer depending on how it is used, and is said to be able to control the viewer's mind unconsciously. In some countries, the law prohibits the insertion and broadcasting of subliminal images, but there is no such law in Japan.

For this reason, when a subliminal image is included in the normal image signal, it is necessary for the individual viewer to defend himself not to be adversely affected. It requires the development of a device that determines the subliminal image included in the normal video signal and removes it, or a device that warns the viewer that the subliminal image is included. Development of a television receiver, a video tape recorder (VTR), etc. is required. However, at present, devices for detecting and removing or warning such subliminal images and image-related devices using these devices have not been developed, and there is currently no self-defense means for the subliminal images.

[0004]

As described above, since there is no means for the viewer to individually defend the subliminal video, the subliminal video in the normal video signal is detected,
There is a demand for development of a device that removes this or a device that warns the viewer that subliminal video is included, and a television receiver or VTR that uses these devices.

Therefore, the present invention has been made in order to solve the above problems, and determines a subliminal image included in a normal video signal and removes it, or includes a subliminal image. An object of the present invention is to provide a subliminal video processing device that warns the viewer of this, a television receiver and a magnetic recording / reproducing device equipped with this subliminal video processing device.

[0006]

According to a first aspect of the present invention, storage means for storing input continuous image data for n screens one screen at a time, latest input image data, and storage for the storage means in the storage means. The comparison means for comparing the difference between the already input image data of each screen and the n comparison results, and the image already stored in the storage means based on the n comparison results obtained by the comparison means Different screen determining means for determining a screen of different image data from the latest input image data from the data and determining it as a different screen, and a screen of image data determined to be a different screen by the different screen determining means A subliminal image determination means for determining whether the image data of the different screen is a screen of a subliminal image based on a number,
And a subliminal image removing unit that prevents the image data of the screen determined to be the subliminal image by the subliminal image determining unit from being output.

According to a second aspect of the present invention, storage means for continuously storing the input continuous image data for n screens one screen at a time, the latest input image data, and the previously input image data stored in the storage means. Of the image data already stored in the storage means based on the n comparison results obtained by the comparison means by comparing the difference with the image data of each screen Based on the number of screens of the image data determined to be different screens by the different screen determination unit that determines a different screen from the screen of image data different from the latest input image data There is a subliminal image determination unit that determines whether the image data of the different screen is a subliminal image screen, and a screen that is determined to be a subliminal image by the subliminal image determination unit. Has a structure in which and a subliminal video warning means for outputting an image data to alert that the subliminal video is present.

According to a third aspect of the present invention, when there is a screen judged to be subliminal by the subliminal video judging means, subliminal video warning means for outputting image data warning that subliminal video is present is provided. ing.

According to a fourth aspect of the present invention, when the subliminal video warning means has a screen judged to be subliminal by the subliminal video judgment means, a VASS signal for notifying a position where the subliminal video screen is present is sent to the warning image data. In addition, or in place of the warning image data, a configuration for outputting the warning image data is provided.

According to a fifth aspect of the invention, the storage means divides and stores the input image data of one screen into odd fields and even fields, and the comparing means stores the latest input image data in the odd fields and even fields. And compares the difference between the image data of the odd field and the even field and the image data of the odd field and the even field of the already input screens stored in the storage means.
The n different comparison results are obtained, and the different screen determination means determines the latest input image data from the image data already accumulated in the storage means based on the 2n comparison results obtained by the comparison means. It is provided with a configuration in which a screen of different image data is obtained and judged as a different screen.

According to a sixth aspect of the present invention, the different screen determination means continuously stores the different screen determination results of the latest input image data and already stored image data in the first RAM for each screen, and the subliminal image determination is performed. The means has a configuration for determining the presence or absence of the subliminal video screen based on the pattern of the determination result stored in the first RAM.

According to a seventh aspect of the present invention, when the subliminal image judging means judges the existence of the subliminal image screen,
Thereafter, the different screen determination result of the first RAM is set to the second RA.
The operation of transferring the contents and OR to M is started, and thereafter, the data in the second RAM is subjected to a shift processing so as to be halved for each vertical synchronization cycle of the input image data, and the subliminal image removal is performed. The means stops the output of the input image data according to the data pattern in the second RAM,
It has a configuration for performing output start control.

According to an eighth aspect of the present invention, the subliminal image removing means is configured to read out and output the oldest input image data stored in the storage means, and the oldest input image data in the storage means. In the area to store
A configuration is provided in which output of image data is stopped and output is started depending on whether the next oldest image data is stored as input image data or not.

According to a ninth aspect of the present invention, the different screen determination means determines that both image data are different screens when the latest input image data and the already input already input image data differ by m% or more. I have it.

According to a tenth aspect of the present invention, the input image data is a luminance signal.

According to the invention of claim 11, the input image data is a color signal.

According to a twelfth aspect of the present invention, storage means for continuously storing the input continuous image data for n screens one screen at a time, and the latest input image data and the existing image data stored in the storage means. Comparison means for obtaining a comparison result of n comparisons by comparing the difference with the image data of each input screen, and image data already stored in the storage means based on the comparison results of n comparisons obtained by the comparison means. Two sets of different screen determining means for determining a screen of image data different from the most recently input image data and determining it as a different screen are provided, and the image data input to one of the sets is a luminance signal, The image data input to the other set is used as a color signal, and two different screen determination results for the luminance signal and the color signal are obtained from the two sets of different screen determination means, and the subliminal image determination means uses these 2 Image data of the different screen based on different screen judgment result of includes determining configure whether screen subliminal images.

In a thirteenth aspect of the present invention, the subliminal image determination means weights the two different screen determination results and determines whether or not the image data of the different screen is a subliminal image screen.

According to a fourteenth aspect of the present invention, in the television receiver for displaying an image corresponding to the video signal on a screen of a cathode ray tube after performing signal processing on the video signal selected and received by the tuner, the received video signal. The subliminal image processing device according to any one of claims 1 to 13 is provided for processing the subliminal image included in the above item.

According to a fifteenth aspect of the present invention, in a magnetic recording / reproducing apparatus for recording / reproducing a video signal on / from a magnetic tape by a magnetic head, a subliminal video contained in the recording video signal is processed when the video signal is recorded on the magnetic tape. Therefore, the subliminal video processing device according to any one of claims 1 to 13 is provided.

According to a sixteenth aspect of the present invention, in a magnetic recording / reproducing apparatus for recording / reproducing a video signal on / from a magnetic tape, the subliminal image contained in the reproduced video signal reproduced from the magnetic tape is processed. It has a configuration in which the subliminal video processing device according to any one is mounted.

According to a seventeenth aspect of the present invention, in a magnetic recording / reproducing apparatus for recording / reproducing a video signal on / from a magnetic tape, for processing a subliminal image included in the recording video signal when recording the video signal on the magnetic tape, 14. A configuration in which the subliminal image processing device according to any one of claims 1 to 13 is mounted in both a video signal recording system and a video signal reproducing system for processing a subliminal image included in a reproduced video signal reproduced from the magnetic tape. Is equipped with.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a first embodiment of a subliminal image processing device of the present invention. 1 is a sync signal detection unit that detects a sync signal from an input video signal, 2 is a brightness signal / color signal separation unit that separates a brightness signal and a color signal from the input video signal, and 3 is a digital analog brightness signal A / D conversion unit 4 for converting, a band pass filter (BPF) for removing unnecessary components and extracting only a luminance signal, a demodulation unit 5 for demodulating a frequency-modulated luminance signal into an original luminance signal, and 7 for input The sub-liminal image in the input video signal is determined by performing frame processing on the luminance signal (or chrominance signal) that is synchronized with the vertical synchronization signal, and the sub-liminal video part is removed or the sub-liminal video is removed. Signal processing unit that performs a process of issuing a warning that there is a signal, a modulation unit that modulates a color signal into a modulation color signal, and a D / A conversion unit that converts the modulation color signal into an analog modulation color signal. 1, 10 is an A / D converter that digitizes analog color signals, 11 is a low-pass filter that removes unnecessary components to make only color signals, and 12 is luminance that mixes luminance signals and color signals into video signals. signal/
The color signal mixing section 13 is a D / which converts the video signal into an analog signal.
The A converters 61 to 6n store the brightness signals (or color signals) from the previous screen to the previous n screens one screen at a time.
It is a frame memory before the n screen.

Next, the operation of this embodiment will be described. When the video signal received by the derevision receiver or the like is input, the sync signal is detected from the video signal by the sync signal detection unit 1 and is also input to the luminance signal / color signal separation unit 2. , A luminance signal and a color signal. The luminance signal is converted into a digital signal by the A / D conversion unit 3, an unnecessary component is removed by the bandpass filter 4, demodulated by the demodulation unit 5, and input to the signal processing unit 7. On the other hand, the color signal is converted into a digital signal by the A / D conversion unit 10 and then an unnecessary component is removed by a low pass filter (LPF) 11 before being input to the signal processing unit 7.

The signal processing unit 7 is composed of a microcomputer, and inputs the luminance signal (or color signal)
A process for inputting to the front-to-n-pre-frame memory 61 to 6n and performing frame processing to determine a subliminal image and remove it or warn that a subliminal image is inserted. To do. The color signal output from the signal processor 7 is modulated by the modulator 8 and then D
The / A converter 9 converts the analog color signal and outputs the analog color signal to the outside. At the same time, the luminance signal output from the signal processing unit 7 is mixed by the luminance signal / color signal mixing unit 12 into a video signal, which is then converted into an analog video signal by the D / A conversion unit 13 and output to the outside. It When the signal processing unit 7 performs the subliminal image removing operation, the subliminal image portion included in the input image signal is removed from the color signal and the video signal output from the signal processing unit 7.

FIG. 2 shows the 1-frame front frame memory 61 to n-screen front frame memory 6n and the signal processing section 7 shown in FIG.
3 is a block diagram for explaining the operation of a subliminal video processing system including The odd / even separation unit 71 separates the input luminance signal into an even field and an odd field. The luminance signals for one screen separated into the even field and the odd field are stored in the frame memories 61 to 6n before the 1st screen to the nth screen before the even field and the odd field are separated.

After that, when a luminance signal for one screen is newly input and separated by the odd / even separation unit 71, the luminance signal for one screen is input to the previous frame memory 61 for one screen. Before that, since the luminance signals for one screen, which have been input to the one-frame front frame memory 61 to the n-frame front frame memory 6n, are shifted to the frame memory on the right side of the drawing, the n-frame front frame memory 7n is the most The brightness signal of the old one screen is output.

Reference numeral 72 denotes a comparator, which is (2n + 1) in number, and the latest input one screen luminance signal separated into an even field and an odd field by the odd / even separator 71 and 1
Pre-screen frame memories 61 to n Compare even-numbered fields and odd-numbered fields of one screen of the luminance signals input to the front-screen frames 6n separately and simultaneously, and determine the difference component as the comparison result to the different-screen determination processing unit. Output to 73. When the difference component input from each comparator 72 has a large value that can be determined to be a different screen, the different-screen determination processing unit 73 determines the 1-bit area reserved in the first RAM 74 for each comparator 72. The value is set to 1 (a flag is set), and when the value is any other value, it is determined that the screen is the same, and the 1-bit area of the first RAM 74 is set to 0 (a flag is set to sleep).

Here, in order to determine the different screen by the different screen determination processing unit 73, for example, when m% or more of the luminance signals of the two fields to be compared are different, the screen (pattern) of both fields is displayed. Is judged to be a different screen. Also, the first RA
The most significant bit of M74 indicates the determination result of the latest screen and the oldest accumulated screen, and it is assumed that the compared accumulated screen becomes newer as it goes to the lower bits.

FIG. 3 shows a concrete example in which the subliminal image is removed from the input image signal by the apparatus shown in FIG. In the figure, the left side is the input video signal, the right side is the output video signal,
The upper and lower parts show the time axis, the upper part of the central figure shows an example of bit data in the first RAM 74, the middle part shows an example of bit data in the second RAM 77 described later, and the lower part shows bit data obtained by shifting the bit data in the second RAM 77. However, in this example, there are three frame memories.

The subliminal image determination processing section 75 monitors the bit data of the first RAM 74 described above,
When 0 is present in the bit data in the AM 74 and 1 is present in the higher bit data of 0, it is determined that the subliminal video is input, and the bit data in the first RAM 74 is compared with the bit data in the second RAM 77. The process of calculating and moving it into the second RAM 77 is started. The reason why the subliminal image determination processing unit 75 makes the above determination is that the bit data in the first RAM 74 is 0.
Means that there is a part that is judged to be the same screen, and that there is bit data of 1 in the higher order bits is accumulated older than the screen judged to be the same screen. This means that there is a portion of the (previously input) screen that has been determined to be a different screen, and this is occurring in the screen accumulated between the 1-screen previous frame memory 61 to the n-screen previous frame memory 6n. Therefore, after all, it can be determined that different screens different from the previous and subsequent screens are inserted by the number of frames limited by the number n of the frame memories, and this is determined as a subliminal video.

When the subliminal video determination processing unit 75 determines that the subliminal video is a subliminal video, it activates the subliminal video warning processing unit 76 to add subtitle images warning that the subliminal video is inserted to the adders 79 and 80. Thus, it is superposed and inserted in the even / odd field of the luminance signal of one screen read from the n-screen previous frame memory 6n and output. In the case of recording on the VTR, the subliminal video warning processing unit 76 inserts VASS indicating the position where the subliminal video is inserted into the even / odd fields of the output luminance signal by the adders 79 and 80.

The operation of the subliminal image determination processing section 75 will be described with reference to the concrete example shown in FIG. 3. When the image of the ninth field is input, the 0th bit and the 1st bit of the first RAM 74 are "0, 0". , All the upper bits become “1” and the above condition is satisfied, so that the subliminal image determination processing unit 75 determines at this point that a subliminal image exists.

By the way, from the time when the presence of the subliminal image is determined, the subliminal image determination processing unit 75 transfers the data in the first RAM 74 to the second RAM.
The process of taking the data in the 77 and the OR and moving it to the second RAM 77 is started. Thereafter, the data in the second RAM 77 is processed by the RAM shift processing unit 82 at every vertical synchronization cycle.
It is shifted to the lower bit side so that it becomes 1/2. FIG.
In this specific example, the portion corresponding to shift D is this portion.

The subliminal image elimination processing circuit 78 monitors the bit data in the second RAM 77, and the 0th bit or the 1st bit of this bit data, or the 0th bit and the 1st bit.
When it is detected that both of the bit positions have become 1, the switch 81 is turned off, and the luminance signal of the subliminal video from the (n-1) screen previous frame memory (6n-1) does not move to the n screen previous frame memory 6n. In this way, the subliminal image is removed by preventing the luminance signal of the subliminal image from being output from the n-screen previous frame memory 6n.

After that, the subliminal image removal processing circuit 7
8 further monitors the bit data in the second RAM 77,
When it is detected that the data of both the 0th bit and the 1st bit is 0, the switch 81 is turned on, and a normal image which is not a different screen is displayed again on the (n-1) th screen previous frame memory 6n-1 to the nth screen. A normal image is output by shifting to the previous frame memory 6n.

Here, the subliminal image removal processing circuit 7
8 will be described with reference to the specific example shown in FIG. At the 9th field, the second bit data of the second RAM 77 becomes 1, so that the switch 81 is turned off and 2
One screen data of the luminance signal does not move from the previous frame memory of the screen to the previous frame memory of the third screen. Therefore, the output screen is the luminance signal screen of the third field and the fourth field stored in the previous frame memory of the third screen. The data becomes the data, and the subliminal luminance signal screen data of the fifth and sixth fields is not output.

Then, in the 14th field, the second RAM
When both the first bit data and the second bit data of the 77 bit data become 0, the switch 87 that connects the second screen previous frame memory and the third screen previous frame memory is turned on, and the second screen previous frame memory to the third screen previous The movement of one screen data of the luminance signal to the frame memory is started, and the output screen thereafter returns to the normal state. As a result, the subliminal luminance signal screen data of the fifth field to the eighth field is not output, and the subliminal image is removed.

Here, in addition to the above description, the consistent operation of the specific example shown in FIG. 3 will be described. When the normal video signals of the first to fourth fields are input to the signal processing unit 7, all the bit data of the first RAM 74 become 0, and the output video signal always outputs the video signal of the previous three screens. Even when the subliminal video signals of the fifth field to the eighth field are input, the output video signal always outputs the video signal of the previous three screens.
The subliminal image is not output and is stored in the one-screen previous frame memory and the two-screen previous frame memory. This is the delay time required to distinguish the video signal whose screen is switched from the subliminal video.

At this time, in the first RAM 74, the comparison result portion of the first to fourth fields is judged to be bit data 1 (= different screen), but the second RAM 77 is 0.
It remains. When the video signal of the 9th field is input, the signal becomes different from the one before the first and second screens.
Bits 3, 4, 5, 6 = 1 in RAM74) The same signal as before 3 screens (bits 1, 2 = in the first RAM74 =
0). Therefore, the subliminal video determination processing unit 75 determines that the subliminal video signal is present, and the second RAM
The data in the first RAM 74 is ORed and transferred to 77, and at the same time, the subliminal video warning processing unit 76 superimposes a warning image (subtitle super) on the output video signal. Further, the subliminal image removal processing unit 78 outputs 1 of the shifted bit data in the second RAM 77.
When it is detected that the 1st bit or the 2nd bit is 1 in the 9th field, the switch 81 between the 2nd screen front frame memory and the 3rd screen front frame memory is opened, and the 5th field in the last stage 3rd screen front frame memory is opened. The process of removing the subliminal image is performed without inputting the subliminal image of the eye.

According to the present embodiment, the most recently input luminance signal and the already-input one-frame previous frame memory 6
1 to n screens can be compared with the luminance signal stored in the previous frame memory 6n, and a screen having a picture different from the previous and subsequent screens inserted in a few n frames or less can be determined as a subliminal image, When this subliminal video is determined, an image that warns the existence of the subliminal video can be superimposed on the output video signal to notify the viewer. Further, the subliminal image can be automatically removed by not outputting the screen corresponding to the subliminal image.

Note that, unlike the above embodiment, either one of the function of warning the existence of the subliminal image and the function of removing the subliminal image may be provided, and which function is used. Can also be made selectable.

Next, a second embodiment of the subliminal image processing apparatus of the present invention will be described. The configuration of this example is the first
Since the configuration is the same as that of the embodiment, the following description will be made with reference to FIG. In the subliminal video processing system of this example, the input color signals are separated by the even / odd field separation unit 71, and these are stored in the newly input order from the 1-screen previous frame memory 61 to the n-screen previous frame memory 6n. , Latest input color signal and previous screen frame memory 6
The comparators 72 simultaneously compare the already-input color signals accumulated in the frame memories 6n for the preceding screens 1 to n. The different-screen determination processing unit 73 determines that the screen is different when the hue of both screens differs by m% or more, and inputs 1 to the corresponding bit area of the first RAM 74.

The subsequent subliminal image determination processing unit 75,
The operations of the subliminal image warning processing unit 76, the subliminal image removal processing unit 78, and the RAM shift processing unit 82 are the first.
Is similar to that of the first embodiment, and the latest input color signal and the one-screen previous frame memory 61 to
By comparing the color signals stored in the n-screen previous frame memory 6n, a screen inserted between n frames or less and having a different color tone from the preceding and succeeding screens can be determined as a subliminal image. When the subliminal video is determined, an image warning the presence of the subliminal video can be superimposed on the output video signal to notify the viewer. Further, it is possible to automatically remove the subliminal image by not outputting the screen corresponding to the subliminal image.

FIG. 4 is a block diagram showing a subliminal image processing system which is a main part of the configuration of the third embodiment of the subliminal image processing device of the present invention. Reference numeral 41 is a different-screen determination system for a brightness signal, which compares the latest brightness signal with the already-input brightness signals stored in two frame memories and determines a different screen. The even / odd field separation shown in FIG. Part 7
The first and first screen frame memories 61 to n correspond to the screen front frame memory 6n, the comparator 72, and the different screen determination processing unit 73. Reference numeral 42 denotes a different-screen determination system for a color signal that determines the different screen by comparing the latest color signal with the already-input color signals stored in a plurality of one-screen frame memories, and the even / odd field shown in FIG. The separation unit 71 is a part corresponding to the one-screen previous frame memory 61 to n-screen previous frame memory 6n, the comparator 72, and the different screen determination processing unit 73. Reference numeral 43 denotes a subliminal video determination processing unit that determines a subliminal video in the input video signal based on the different screen determination results of the luminance signal screen determination system 41 and the color signal screen determination system 42, and 44 denotes a subliminal video determination processing unit 43 that is a subliminal video. When the presence of the subliminal video is determined, a subliminal video warning processing unit that outputs an image (subtitle super, etc.) that warns that the subliminal video is present to the adder 46, and 45 indicates the subliminal video screen determined by the subliminal video determination processing unit 43. Subliminal image removal unit that removes the output so that it is not output,
Reference numeral 46 is an adder that inserts an image that warns that a subliminal image is inserted in the output luminance signal.

Next, the operation of this embodiment will be described. The luminance signal different screen determination system 41 determines from the input luminance signal Y that
A screen having a pattern different from the patterns on the front and rear screens is determined, and the determination result is sent to the subliminal image determination processing unit 43. The color signal different screen determination system 42 determines a screen having a hue different from that of the preceding and following screens from the input color signal C, and sends the determination result to the subliminal image determination processing unit 43. The subliminal image determination processing unit 43 determines the presence or absence of the subliminal image based on both the determination results of the luminance signal different screen determination system 41 and the color signal different screen determination system 42.

When the subliminal video judgment processing unit 43 judges that the subliminal video exists, the subliminal video warning processing unit 44 outputs an image warning that the subliminal video exists to the adding unit 46, and outputs it to the output luminance signal. Superimpose the warning image. In addition, the subliminal image removing unit 45 includes the subliminal image determination processing unit 4
The luminance signal / color signal different screen determination systems 41 and 42 are controlled so that the screen determined to be a subliminal image by 3 is not output so that the luminance signal and the color signal of the subliminal image portion are not output.

According to the present embodiment, the presence or absence of the subliminal image is determined based on the results of both the different screen determination based on the luminance signal and the different screen determination based on the color signal. It can be improved as compared with the embodiment. Other effects are similar to those of the previous embodiment.

The subliminal image determination processing unit 43 weights the different screen determination result by the luminance signal and the different screen determination result by the color signal according to the characteristics of the subliminal image to determine the presence or absence of the subliminal image. The subliminal image determination accuracy can be further improved.

In the first, second and third embodiments, since the input video signal is an interlaced signal, the image data of one screen is divided into even field and odd field for comparison. In the case of an image video signal that has not been raced, the image data of the latest input one screen and the image data of the already input one screen may be compared.

FIG. 5 is a block diagram showing a schematic configuration of an embodiment of a television receiver of the present invention. The television broadcast signal captured by the antenna 51 is selected and received by the tuner 52, becomes an intermediate frequency video signal, and is input to the video processing circuit 53. The image processing circuit 53 subjects the input intermediate frequency image signal to image detection and the like, amplifies it, and then outputs it as an image from the cathode ray tube 4.

The video processing circuit 53 of the present example has a built-in subliminal video processing system 531 as shown in FIGS. 1 and 4, for a luminance signal or a color signal or both signals obtained in the video processing process. Determine the existence of subliminal video,
If a subliminal image exists, this subliminal image portion is removed so that it is not output from the cathode ray tube 54.

According to this embodiment, even if the subliminal video signal is inserted in the television broadcast video signal, the subliminal video processing system 531 can automatically remove the subliminal video signal. Viewers can be protected.

When the subliminal image processing system 531 determines the presence of the subliminal image, an image warning that the subliminal image is present may be output to the screen of the cathode ray tube 54 together with the removal of the subliminal image. In some cases, only this warning image is displayed on the cathode ray tube 5.
It is also possible to adopt a configuration of outputting on the screen of No. 4.

FIG. 6 is a block diagram showing a schematic configuration of an embodiment of the magnetic recording / reproducing apparatus of the present invention. When recording,
The recording video signal processing unit 64 inputs the video signal from the tuner 61 selected by the selection switch 63 or the video signal from the line input terminal 62. The recording video signal processing unit 64 performs various processes on the luminance signal and the color signal of the input video signal to create a recording video signal, outputs the recording video signal to the recording head 65, and records the video signal on the magnetic tape 600. To do.

The recording video signal processing unit 64 incorporates the subliminal video processing system 60 shown in FIG. 1 and FIG. 4, and for the luminance signal or color signal or both signals obtained in the recording video signal processing process. The presence or absence of the subliminal image is determined, and when the subliminal image is inserted, this subliminal image screen is removed (or the subliminal image insertion warning image is input) so that it is not recorded on the tape 600. In this case, the subliminal image processing system 60 may generate the VASS signal and record it on the tape 600 without removing the subliminal image screen so that the subliminal image recording position can be searched during reproduction.

The reproduced video signal processing section 67 includes a reproducing head 66.
The luminance signal and the color signal of the reproduced video signal reproduced from the tape 600 are subjected to various processes to create a reproduced video signal, and the reproduced video signal is output to the video output terminal 68. The reproduction video signal processing unit 67 has a subliminal video processing system 60 built therein, and determines whether or not there is a subliminal video with respect to a luminance signal, a color signal, or both signals obtained in a reproduction video signal processing process, and When inserted, the video signal from which the subliminal video screen is removed (or the subliminal video presence warning image is input) is output to the video output terminal 63.

According to the present embodiment, the subliminal video screen can be removed from the video signal recorded on the tape 600, or an image warning the presence of the subliminal video can be input to the recorded video signal, so that a normal video tape is used. When the tape is reproduced by the recorder, the viewer can be protected from the adverse effect of the subliminal image and the subliminal image recording position can be easily searched.

Further, even when the tape 600 recorded by a normal video tape recorder is reproduced, the subliminal video screen may be removed from the reproduced video signal or an image warning of the presence of the subliminal video may be input to the reproduced video signal. Therefore, the viewer can be protected from the adverse effects of the subliminal video.

The subliminal video processing system 60 can protect the viewer from the subliminal video even if the subliminal video processing system 60 is built in either the recording video signal processing unit 64 or the reproduction video signal processing unit 67. Further, in the above embodiment, the VTR is described as an example, but the present invention is not limited to this,
Even in the case where the recording medium is a disc or a device which optically records and reproduces information, by providing the above-described subliminal video processing system 60 in the video signal recording system or the reproducing system or both systems, the subliminal video can be viewed from the viewer. Can be protected.

[0061]

As described above, according to the invention of claim 1, the subliminal image included in the normal image signal can be removed.

According to the second aspect of the present invention, the viewer can be warned that the normal video signal contains the subliminal video.

According to the third aspect of the present invention, the subliminal image included in the normal image signal can be removed and the viewer can be warned that the normal image signal includes the subliminal image.

According to the fourth aspect of the invention, the information for detecting the position of the subliminal image included in the normal image signal can be output.

According to the fifth aspect of the invention, even if the input image is the tevision broadcast received image data, it can be dealt with.

According to the invention of claim 6, the presence of the subliminal image can be determined easily and surely.

According to the seventh or eighth aspect of the invention, it is possible to easily and surely stop the output of only the subliminal video screen.

According to the ninth aspect of the invention, it is possible to easily and surely determine the different screen.

According to the tenth aspect of the invention, the subliminal image can be determined by the difference in the pattern.

According to the eleventh aspect of the invention, it is possible to determine the subliminal image based on the difference in hue.

According to the twelfth or thirteenth aspect of the present invention, the subliminal image can be judged by the difference in the pattern and the hue.

According to the fourteenth aspect of the invention, it is possible to protect the viewer who watches the television broadcast from the adverse effect of the subliminal image.

According to the inventions of claims 15, 16 and 17,
It is possible to protect a viewer who tries to reproduce an image with the magnetic recording / reproducing apparatus from the adverse effect of the subliminal image, and to identify the subliminal image portion.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of a subliminal image processing device of the present invention.

FIG. 2 is a block diagram for explaining the operation of a subliminal video processing system including a one-screen previous frame memory to an n-screen previous frame memory and a signal processing unit shown in FIG.

FIG. 3 is a diagram showing a specific example of an input video signal and an example of an output video signal when a subliminal image is removed by the apparatus shown in FIG.

FIG. 4 is a block diagram showing a subliminal video processing system, which is a main part of the configuration of the third embodiment of the subliminal video processing device of the present invention.

FIG. 5 is a block diagram showing a schematic configuration example of an embodiment of a television receiver of the present invention.

FIG. 6 is a block diagram showing a schematic configuration example of an embodiment of a magnetic recording / reproducing apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sync signal detection part 2 ... Luminance signal color signal separation part 3, 10 ... A / D conversion part 4 ... Band pass filter 5 ... Demodulation part 7 ... Signal processing part 8 ... Modulation part 9, 13 ... D / A conversion part 11 ... Low-pass filter 12 ... Luminance signal / color signal mixing unit 60, 531 ... Subliminal video processing system 61 to 6n ... Frame memory 71 ... Odd / even field separation unit 72 ... Comparator 73 ... Different screen determination processing unit 74 ... First RAM 75 ... Subliminal video determination processing unit 76 ... Subliminal video warning processing unit 77 ... Second RAM 78 ... Subliminal video removal processing unit 79, 80 ... Adder 81 ... Switch 82 ... RAM shift processing unit

Claims (17)

[Claims] 1. A storage means for accumulating input continuous image data for n screens one screen at a time, a latest input image data and image data of each already input screen stored in the storage means. Comparing means for comparing the differences to obtain n comparison results, and the latest input image from among the image data already stored in the storage means based on the n comparison results obtained by the comparing means. Different screen determining means for determining a screen of image data different from the data and determining it as a different screen, and the image data of the different screen based on the number of screens of the image data determined to be the different screen by the different screen determining means. Subliminal video determination means for determining whether or not the screen is a subliminal video, and not outputting image data of the screen determined to be a subliminal video by this subliminal video determination means Subliminal image processing apparatus characterized by comprising a subliminal video removal means for. 2. Storage means for continuously storing input continuous image data for n screens one screen at a time, image data input most recently, and images of each already input screen stored in the storage means. Comparison means for comparing the difference with the data to obtain n comparison results, and the latest input from among the image data already stored in the storage means based on the n comparison results obtained by the comparison means. Different screen determining means for determining a screen of image data different from the generated image data and determining it as a different screen, and the different screen based on the number of screens of the image data determined to be different screen by the different screen determining means. If there is a subliminal video determination means for determining whether the image data is a subliminal video screen, and a screen determined to be a subliminal video by this subliminal video determination means, the sublimina Subliminal image processing apparatus characterized by comprising a subliminal video warning means for outputting an image data to alert that the image exists. 3. A subliminal image warning unit for outputting image data for warning that a subliminal image is present when there is a screen determined to be subliminal by the subliminal image determination unit. The described subliminal video processing device. 4. The subliminal video warning means, when there is a screen judged to be subliminal by the subliminal video judgment means, a VASS signal for notifying the position where the subliminal video screen exists together with the warning image data, or the warning. The subliminal image processing device according to claim 2, wherein the subliminal image processing device outputs the image data instead of the image data. 5. The storage means divides and stores the input image data of one screen into an odd field and an even field, and the comparing means divides the latest input image data into an odd field and an even field. The difference between the image data of the odd number field and the even number field and the image data of the odd number field and the even number field of the already input screen stored in the storage means are compared to obtain 2n comparison results, and the different screen determination means is obtained. Determines a screen of image data different from the latest input image data from the image data already stored in the storage means based on the 2n comparison results obtained by the comparison means, and sets it as a different screen. 3. The subliminal video processing device according to claim 1, wherein the subliminal video processing device is determined. 6. The different-screen determination means continuously stores the different-screen determination results of the latest input image data and the already-stored image data in a first RAM for each screen, and the subliminal image determination means uses the first 3. The subliminal video processing device according to claim 1, wherein the presence or absence of the subliminal video screen is judged based on the pattern of the judgment result stored in the RAM. 7. The subliminal image determination means, when determining the presence of the subliminal image screen, starts the operation of transferring the different screen determination result of the first RAM to the second RAM by taking the content and OR of the result. After that, the data in the second RAM is 1 / every vertical synchronization cycle of the input image data.
3. The shift processing is performed so that the number becomes 2, and the subliminal image removing means performs output stop and output start control of input image data according to a pattern of data in the second RAM. Subliminal video processing device. 8. The subliminal image removing means is configured to read and output the oldest input image data stored in the storage means, and to store the oldest input image data in the storage means in an area for storing the oldest input image data. 8. The subliminal video processing device according to claim 7, wherein output of image data is stopped and output is started depending on whether the next oldest image data is stored as input image data or not. 9. The different screen determination means determines that both the image data of the latest input and the image data of the already input already stored are different screens when they differ by m% or more. 1. The subliminal image processing device according to 1. 10. The subliminal video processing device according to claim 1, wherein the input image data is a luminance signal. 11. The subliminal image processing device according to claim 1, wherein the input image data is a color signal. 12. A storage unit for continuously storing the input continuous image data for n screens one screen at a time, and the latest input image data and the already input screens stored in the storage unit. Comparing means for obtaining a comparison result of n comparisons by comparing the difference with the image data; and the latest one of the image data already stored in the storage means based on the comparison result of the n comparisons obtained by the comparison means. Different screen determination means for obtaining a screen of image data different from the input image data and determining it as a different screen
Two sets of different screens in the luminance signal and the color signal from the two sets of different screen determination means are provided, with the image data input to one set as the luminance signal and the image data input to the other set as the color signal. 3. The determination result is obtained, and the subliminal video determination means determines whether the image data of the different screen is a subliminal video screen based on these two different screen determination results. The described subliminal video processing device. 13. The subliminal according to claim 12, wherein the subliminal image determination means weights the two different screen determination results to determine whether the image data of the different screen is a subliminal image screen. Video processing device. 14. A television receiver for displaying an image corresponding to the video signal on a screen of a cathode ray tube after performing signal processing on the video signal received by the tuner and selecting a subliminal image included in the received video signal. A television receiver comprising the subliminal image processing device according to any one of claims 1 to 13 for processing the above. 15. A magnetic recording / reproducing apparatus for recording / reproducing a video signal on / from a magnetic tape by a magnetic head, for processing a subliminal video contained in the recording video signal when recording the video signal on the magnetic tape.
14. A magnetic recording / reproducing apparatus equipped with the subliminal image processing device according to any one of 1 to 13. 16. The magnetic recording / reproducing apparatus for recording / reproducing a video signal on a magnetic tape, according to claim 1, for processing a subliminal video included in a reproduced video signal reproduced from the magnetic tape. A magnetic recording / reproducing apparatus equipped with a subliminal image processing device. 17. A magnetic recording / reproducing apparatus for recording / reproducing a video signal on a magnetic tape, for processing a subliminal image included in a recording video signal when recording the video signal on the magnetic tape, and for reproducing from the magnetic tape. In addition, in order to process the subliminal video included in the reproduced video signal, the subliminal video processing device according to any one of claims 1 to 13 is mounted in both the video signal recording system and the video signal reproducing system. Recording / playback device.