JP2004356932A - Processing method and device for video encipherment and encipherment release - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing method and a device for video encipherment and encipherment release. <P>SOLUTION: A cipher is added to a video signal reproduced on a movie picture. In reproducing the movie picture, if not performing decoding processing, a reproducing video signal of the major move picture cannot be seen. Meanwhile, if performing the decoding processing the reproducing video signal of the major move picture can be seen. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and apparatus for processing video encryption and decryption, and in particular, encrypts a movie and outputs a video signal. The present invention relates to a processing method and apparatus for providing an overlapped screen and preventing a minor from watching a movie designated by R.
[0002]
[Prior art]
As is well known, all video signals are currently stored on video tapes or CD media, and viewers can obtain video tapes or CD media and then simply play them on a playback device to watch the video signals stored on them. Can be.
[0003]
Video tapes or CD media storing such video signals are all classified according to the presence or absence of R designation and the R designation level. There is a concern that the effects of this may be formed. However, R-rated movies can be rented or purchased anywhere, and it is therefore difficult to prevent adolescents from actually watching them.
[0004]
Therefore, some movie makers perform mosaic processing in the reproduced video signal of the movie. The principle is to use the fact that the pixels of the entire screen are relatively large after the pixel merging process, and to provide a mosaic within the screen where exposure is not desirable.In the pixel merging process, all pixels in the shield mask are grayed out. After summing up the levels, calculate the average, then write in the gray level of each pixel in the shield mask, block the screen of the important parts (aversion, fear etc.) played in the movie, After the movie has been acquired, the viewer cannot view the important parts of the playback in the movie.
[0005]
However, although the function of encryption can be achieved by adding a mosaic signal to the video signal of the movie, if the video is encrypted using this method, the resolution of the video cannot be increased, and the color The discriminating ability is low and the production cost is high. Furthermore, the mosaic technology is semi-transparent, so that the viewer cannot distinguish the detailed structure of the screen after video encryption, but the screen that is actually reproduced is half-visible and half-invisible, completely shielding the screen. Is not possible, young people may imagine the contents of this video from the shadows in the video, and professional mosaic signal release equipment is generally easily available, so it is necessary to purchase it and perform decoding work. You can see the processed image. Therefore, it is actually difficult for such a video encryption method using a mosaic signal to prevent a young person from watching an R-designated movie.
[0006]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is a primary object of the present invention to solve the above-mentioned drawbacks of the prior art and to eliminate the drawbacks, and the present invention adds encryption to a video signal played in a movie and decodes the video signal when playing the movie. If the process is not performed, the reproduced video signal of the main movie cannot be watched, and if the decoding process is performed, the reproduced video signal of the main movie can be watched.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a method for processing video encryption and decryption,
a) taking at least one main movie (1) and at least one sub-movie (2), (3), (4);
b) When reproducing the main movie (1) and the sub-movies (2), (3), and (4), the video signal is synchronously input to the composite video signal processing unit (5) and provided for the video signal compositing process. Steps,
c) As described above, after the video signals of the main movie (1) and the sub-movies (2), (3), (4) are synchronously input into the composite video signal processing unit (5), the composite video signal processing unit (5) According to 5), the video signals of the main movie (1) and the sub-movies (2), (3) and (4) are synthesized and overlapped. Completing the encrypted composite movie (7) after adding the mark signal (6) to the
d) When playing back the encrypted composite movie (7), the video is decrypted by video decryption processing, that is, the analog video signal of the encrypted movie is converted into a digital signal by an analog / digital converter. Outputting and storing the data in the storage unit (9);
e) determining whether the data in the storage unit (9) has been updated by the detection control unit (10);
f) The data in the storage unit (9) is sequentially output to the digital-to-analog converter, and the digital-to-analog converter converts the digital data flow into an analog video signal and outputs it, so that the viewer can watch the main movie. Steps,
A video encryption / decryption processing method comprising the above steps is provided.
The invention according to claim 2 is a video encryption and decryption processing device,
An encoding unit (8), which is an analog-to-digital converter for encoding the encrypted video,
A storage unit (9) serving as a dual port memory for storing the digital signal after encoding;
A detection control unit (10) for performing mark signal detection and memory read / write control to determine whether data in the storage unit (9) has been updated;
A decoding unit (11) which is a digital-to-analog converter for converting a digital video data flow output from the storage unit (9) into an analog video signal and outputting the analog video signal;
And a processing device for video encryption and decryption.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the video encryption and decryption processing apparatus of the present invention, when taking at least one main movie and at least one sub-movie, and reproducing the above-mentioned main movie and sub-movie, the video signal is sent to the composite video signal processing unit. Synchronously input and subjected to video signal synthesis processing, the synthesized video signal processing unit synthesizes and overlaps the video signals of the main movie and the sub-movie, and marks each image field of the main movie during the synthesis process. After adding the signal, the encrypted composite movie is completed. When the encrypted composite movie is reproduced, the video is decrypted by the video decryption process, that is, the analog video signal of the encrypted movie is converted. The signal is converted to a digital signal by an analog-to-digital converter, output and stored in the storage unit. Judge whether the data has been updated, output the data in the storage unit to the digital-to-analog converter in order, convert the digital data flow into an analog video signal by the digital-to-analog converter, and output it. Let them watch.
[0009]
【Example】
FIG. 1 is a flowchart of a video encryption and decryption processing method according to the present invention. As shown, the video encryption and decryption processing method of the present invention adds a mark signal (encryption) to a video signal. If the decoding process is not performed on the mark signal during movie playback, the video signal viewed by the viewer is a composite video signal in which a plurality of video signals are superimposed, so that the viewer can view the playback video signal of the main movie. Can not be done. This will prevent youth from watching R-rated movies or prevent theft of commercial secrets.
[0010]
In the above-mentioned video encryption method, in the movie production process, a movie selection process is first performed as a first step, that is, at least one main movie (1) and at least one sub movie (2), (3), (4). ). When the main movie (1) and the sub-movies (2), (3), (4) are reproduced, a video signal is input to the composite video signal processing unit (5).
[0011]
In the second step, a video synthesizing process is performed, that is, the video signals of the main movie (1) and the sub-movies (2), (3), (4) are input to the synthesized video signal processing unit (5) synchronously, The combined video signal processing unit (5) combines the video signals of the main movie (1) and the sub-movies (2), (3) and (4) and superimposes them on one another. A mark signal (6) is added to each image field of (1) to complete an encrypted composite movie (7).
[0012]
FIG. 2 is a view showing the video image field encryption processing method of FIG. As shown in the figure, when the video signal synthesis processing is performed on the main movie (1) and the sub-movies (2), (3), and (4), each video field in the main movie (1) has The mark signal (6) to be added is composed of a pattern positioned by the horizontal synchronizing signal and the vertical synchronizing signal. The mark signal (6) is reproduced by a reproducing apparatus (not shown) having decoding equipment when reproducing a movie. When reading the signal (6), only the video signal of the mark signal (6) is read slightly. At this time, the video screen reproduced by the reproducing device (not shown) is a video signal including the mark signal (6), Multiple images are not overlapped video screens. If the reproducing device (not shown) does not have this decoding equipment, the reproduced video will be a screen in which a plurality of video signals overlap.
[0013]
3 and 4 are a video decryption circuit block diagram and a video decryption operation flowchart according to the present invention. As shown, when the above-described encrypted movie is played, a video decryption device performs a video decryption operation, and the video decryption device includes:
An encoding unit (8) which is an analog / digital converter for converting an analog video signal of an encrypted movie into a digital video signal and outputting the digital video signal;
A storage unit (9) serving as a dual port memory for storing the digital signal after encoding;
A detection control unit (10) for performing mark signal detection and memory read / write control to determine whether data in the storage unit (9) has been updated;
A decoding unit (11) which is a digital-to-analog converter for converting a digital video data flow output from the storage unit (9) into an analog video signal and outputting the analog video signal;
It has.
[0014]
After the encrypted analog video signal of the movie is converted into a digital video signal by an analog-to-digital converter and output, it is stored in the storage unit (9), and the detection control unit (10) updates the data in the memory. It is determined whether or not it has been performed. This determination is based on the following steps. That is,
In step 1, the position of the mark signal is localized by the vertical synchronization signal and the horizontal synchronization signal of the video.
In step 2, the sample values of each one sampling signal in the mark signal position are compared.
In step 3, if the sample value is larger than a certain comparison value, 1 is added to the value of the internal counter.
In step 4, if the value of the internal counter is larger than a certain value, it is determined that the data in the memory has been updated. If the value of the internal counter is smaller than this value, it is determined that the data in the memory has not been updated.
[0015]
In an application of the present invention, this memory data may be output to a digital-to-analog converter in sequence without controlling data reading. The digital data flow is converted into an analog video signal and output, so that the viewer can watch the main movie.
[0016]
Furthermore, the technology of the present invention can be applied to advertisements or promotion videos shot by companies in addition to being applied to the above-mentioned R-designated movies, thereby preventing leakage or plagiarism of business opportunities.
[0017]
Further, the encryption and decryption method and apparatus can be mounted inside a monitor, and when a cable or wireless broadcasting station broadcasts a restricted program, the encryption and decryption method and apparatus can be operated. it can.
[0018]
【The invention's effect】
The present invention adds an encryption to a video signal to be played back in a movie, so that the playback video signal of the main movie cannot be viewed unless the decoding process is performed during movie playback. For example, the user can watch the reproduced video signal of the main movie.
[Brief description of the drawings]
FIG. 1 is a flowchart of a video encryption and decryption processing method according to the present invention.
FIG. 2 is a view showing a video image field encryption processing method according to the present invention;
FIG. 3 is a block diagram of a video decryption circuit according to the present invention.
FIG. 4 is a flowchart of a video decryption operation of the present invention.
[Explanation of symbols]
1 Main Movie 2, 3, 4 Sub Movie 5 Synthetic Video Signal Processing Unit 6 Mark Signal 7 Encrypted Synthetic Movie 8 Encoding Unit 9 Storage Unit 10 Detection Control Unit 11 Decoding Unit

Claims (2)

In the processing method of video encryption and decryption,
a) taking at least one main movie (1) and at least one sub-movie (2), (3), (4);
b) When reproducing the main movie (1) and the sub-movies (2), (3), and (4), the video signal is synchronously input to the composite video signal processing unit (5) and provided for the video signal compositing process. Steps,
c) As described above, after the video signals of the main movie (1) and the sub-movies (2), (3), (4) are synchronously input into the composite video signal processing unit (5), the composite video signal processing unit (5) According to 5), the video signals of the main movie (1) and the sub-movies (2), (3) and (4) are synthesized and overlapped. Completing the encrypted composite movie (7) after adding the mark signal (6) to the
d) When playing back the encrypted composite movie (7), the video is decrypted by video decryption processing, that is, the analog video signal of the encrypted movie is converted into a digital signal by an analog / digital converter. Outputting and storing the data in the storage unit (9);
e) determining whether the data in the storage unit (9) has been updated by the detection control unit (10);
f) The data in the storage unit (9) is sequentially output to the digital-to-analog converter, and the digital-to-analog converter converts the digital data flow into an analog video signal and outputs it, so that the viewer can watch the main movie. Steps,
A method for processing video encryption and decryption, comprising the above steps. In the video encryption and decryption processing device,
An encoding unit (8), which is an analog-to-digital converter for encoding the encrypted video,
A storage unit (9) serving as a dual port memory for storing the digital signal after encoding;
A detection control unit (10) for performing mark signal detection and memory read / write control to determine whether data in the storage unit (9) has been updated;
A decoding unit (11) which is a digital-to-analog converter for converting a digital video data flow output from the storage unit (9) into an analog video signal and outputting the analog video signal;
A video encryption and decryption processing device, comprising:

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