JP2008301508A - Recording method, output method, recording medium and recording/reproducing system, for video information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To create a new system (ubiquitous movie) capable of bringing interests to both of copyright holders having the copyrights of movies or the like and general consumers requiring to enjoy video information such as movies anytime and anywhere. <P>SOLUTION: In this recording method, a video information recorded medium is made as follows: As for high-quality video information for which a copyright holder requires copy inhibition or the like, copyright control such as copy inhibition on a DVD or the like is performed, and its resolution or the like is restricted to a half or less in addition to the video information, and copyright protection information allowed to be copied, moved, downloaded or the like is added to copy-inhibited video information whose image quality is limited to a level at which the copyright holder can permit copying or the like. The video information whose resolution is restricted is read out from the video information recorded medium and is recorded in a compact medium to be easily available outdoors. The compact medium storing the video information whose resolution is restricted is reproduced on a reproducing device with a compact display to display the reproduced information on the compact display. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital information recording method and the like.

  In recent years, DVD discs have been used as package media for movie software, and DVD players that play back DVD discs have become popular all over the world. The mechanism for protecting the copyright of a DVD disc used as a package medium for movie software is defined in the DVD ROM standard document of Non-Patent Document 1. As a mechanism for protecting the copyright, copyright protection information relating to copy prohibition, one-generation copy possible (copy once), or copyable copy conditions for recorded content is described.

  Further, in this DVD disk and DVD player, Non-Patent Document 2 describes an example of a DVD copyright protection system CSS (Content Scramble System) that prevents unauthorized copying by general users.

JP 11-31336 A DVD Specialties for Read-Only Disc Part 1 Physical Specifications Version 1.02: September 1999 (page 44) Attached Sheets for DVD Specialization National Technical Report Vol.43 No.3 Jun. 1997 (pages 339-341)

  In order to realize a ubiquitous movie that enjoys video information such as movies with a small and lightweight device outdoors, it is necessary to copy the video information to a small and lightweight medium, but this was not considered. In other words, there is a new mechanism (ubiquitous) that brings benefits to the situation where the interests of the copyright holder of movies and the like and the interests of general consumers who want to enjoy video information such as movies anytime and anywhere conflict. It can be said that creating additional movies) is an issue.

  In Non-Patent Document 2, for contents such as copyrighted movie software (copy prohibited), a mechanism is adopted in which contents recorded on a disc are encrypted so that a general user cannot illegally copy them. ing. However, in such a DVD disc, the copyright protection information that limits the copy restriction of the video information on the same medium is uniform, and the recording of the medium on which a plurality of video information with different copy restrictions is recorded on the same medium.・ Reproduction is not described. Therefore, for example, when two or more digital information with different resolutions are recorded, the copyright protection is uniform, and the copyright holder's interest is protected, but it can be easily copied to other devices. Issues remain from the user's point of view.

  Further, Patent Document 1 describes an example in which images having different resolutions are recorded in an upper layer and a lower layer on a single-sided dual-layer optical disc having two recording layers, an upper layer and a lower layer, and are reproduced by individual pickups. However, in this patent document 1, handling of copyright protection information related to copying is not considered. Therefore, there remains a problem in protecting the copyright holder's interest.

  In view of such problems, an object of the present invention is to provide a recording method and the like that contribute to both copyright protection and user merit.

  An object of the present invention is to record high-quality video information that prohibits copying and low-quality video information with a resolution limited to a level that can be enjoyed on a small display on the same medium. Is to be able to copy. For example, this mechanism makes it possible to play a small medium outdoors and enjoy video information such as movies on a small display.

  In order to achieve the above object, according to the present invention, there is provided a recording method for recording two or more pieces of digital information having different formats, wherein copyright protection information related to the format of the digital information is added, and the format is related to the format. Digital information with the copyright protection information added is recorded.

  According to the present invention, copyright can be protected.

  According to the present invention, high-quality video information for which copying is prohibited and low-quality video information for which copying is permitted are limited. The present invention relates to a video information recording method and the like suitable for copying to a medium and reproducing with a reproducing apparatus with a small display.

  Examples of the present invention will be described below. FIG. 1 shows a configuration example of an embodiment of an optical disc medium on which video information is recorded. Reference numeral 1 denotes an optical disk medium, 2 denotes a recording area for first video information, and 3 denotes a recording area for second video information.

  Next, the video information recorded optical disk medium of the embodiment shown in FIG. 1 will be described. The optical disk medium 1 is an optical disk having a diameter of 12 cm, which is the same as a DVD. The first movie information (horizontal 640 pixels, vertical 480 pixels) that is copy-prohibited on the inner periphery of the disk is compressed with MPEG2 video information, and MPEG1 audio information is MPEG1. The first digital data is generated by compressing and combining the other, and this is recorded in the recording area 2, and both the horizontal and vertical resolutions of the first video information are limited to half. Information (horizontal 320 pixels, vertical 240 pixels) is image-compressed with H.264AVC, audio information is compressed with MP3, and the second digital data obtained by synthesizing both is created and recorded in recording area 3. In this case, since the data amount of the second digital data is about 1/8 of the first digital data ratio, it is easy to add the second digital data to the current DVD prerecorded disc. Both recording areas are divided into an inner circumference and an outer circumference, but both can be recorded in the same area by time division multiplexing.

  In the embodiment, the high-quality video information is 640x480 and the low-quality video information is 320x240. However, when an optical disk using a blue-violet laser is used as the medium, the high-quality video information is selected to be 1920x1080 and the low-quality video information is 960x540 or less. You can also.

  In the embodiment, the same movie information is recorded in both high image quality and low image quality, but according to the intention of the copyright holder, the same movie but low quality movie is edited differently from the high image quality movie, It is also possible to record a low quality movie showing time shorter than that of a high quality movie.

  In the embodiment, MPEG2 is used for high-quality video information and H.264 is used for low-quality video information. H.264 AVC, both of which are the same MPEG2 or H.264. H.264AVC can be selected, and VC9 having good connectivity with the PC may be selected for low-quality video information.

  As a method of combining the first and second video information, the second video information is deleted from the first video information from violent scenes or obscene scenes that are not desirable for children or the like, or further reduced in resolution. By selecting, the second video information can be copied to various media to make it easy for anyone to enjoy.

  In the embodiment, an optical disk medium having a diameter of 12 cm is used as the optical disk medium. However, the first video information and the second video information can be recorded on the same medium by using an optical disk medium having a diameter of 8 cm. .

  FIG. 2 shows an example of the configuration of a reproducing apparatus for the optical disc medium 1 with recorded video information according to the present invention.

  In FIG. 2, 5 is an optical disk device, 6 is a reading device including a digital signal processing circuit 8 such as an optical head 7 and error correction processing, 9 is a signal processing device similar to the current DVD player, 10 is an analog video signal, 11 Is an audio signal, 12 is a flash memory card, 13 is an HDD, 14 is first digital data after error correction processing, 15 is second digital data after error correction processing, and 16 is added to the first video information. Copyright protection information 17 is copyright protection information added to the second video information.

  In FIG. 2, the optical disk device 5 is in the playback mode, the flash memory card 12 and the HDD 13 are in the recording mode. The optical disk device 5 is loaded with the optical disk medium 1 having a diameter of 12 cm and recorded by the reading device 6. The first video information and the second video information are read from the completed optical disk medium 1 with the common optical head 7 and error correction processing of both data is performed with the common digital signal processing circuit 8. 14 and second digital data 15 are output.

  The first digital data 14 is input to the signal processing device 9, decrypted by the decryption circuit 18, and subjected to image decompression, sound decompression, etc. by the image decompression circuit 19 and the sound decompression circuit 20, respectively, and copyright information is added. After the copy protection copyright protection information is added by the circuit 21, the analog video signal 10 and the audio signal 11 are output.

  The error-corrected second digital data 15 output from the reading device 6 is input and recorded in the flash memory card 12 with both video and audio information compressed, or input and recorded in the HDD 13.

  The reading device 6 in FIG. 2 reads the copyright protection information (for example, copy prohibition) 16 added to the first video information by the copyright information reading circuit 22, and uses the copyright information addition circuit 21 of the signal processing device 9. And a macrovision signal or CGMS-A (eg, copy prohibition) is added to the analog video signal 10.

  The copyright information reading circuit 22 of the reading device 6 reads the copyright protection information (for example, copy once) 17 added to the second video information, and records the copyright protection information (for example, the flash memory card 12 and the HDD 13). : Copy prohibited but can be moved).

  When a Veil signal (a 1-bit digital watermark indicating copy prohibition) is added to the first and second videos, this Veil is also applied to the analog video signal 10, the first digital data 14, and the second digital data 15. A signal is included. The second video information 3 Veil (copy prohibited) and CGMS-D (copy once) contradict each other, but the copyright information readout circuit 22 ignores the Veil signal and reads only CGMS-D, so CGMS-D is copy once. In this case, the second digital data 15 is recorded on either the flash memory card 12 or the HDD 13 according to the user's selection. Therefore, Veil and CGMS-D match in the second video information copied to the flash memory card 12 and HDD 13.

  FIG. 3 shows a video information recording apparatus according to the present invention. In FIG. 3, 23 is an optical disk medium having a diameter of 8 cm, 24 is a signal selection circuit, 25 is second digital data for recording, and 26 is an optical disk writing device. In FIG. 3, the flash memory card 12 and the HDD 13 are in the reproduction mode, and the optical disk device 5 is in the recording mode, and a recordable optical disk medium 23 having a diameter of 8 cm is mounted on the optical disk device 5. The second digital data 25 reproduced and selected and output by the signal selection circuit 24 is recorded on the small optical disk medium 23 via the writing device 26.

  The second digital data 25 is also supplied to the signal processing device 9. The image decompression 19 and the sound decompression 20 of the signal processing device 9 determine the image compression method and the sound compression method of the second digital data 25, and the image decompression 19 Image decoder for H. The audio decoder for the audio expansion 20 is switched to MP3 for H.264 AVC, and the analog video signal 10 and the audio signal 11 are output. The writing device 26 reads the copyright protection information from the second digital data 25, writes the copyright protection information (eg, prohibition of movement and copy prohibition) different from the second digital data 25 to the small optical disk 23, Copyright protection information (for example, copy prohibition) different from the data 25 is also output to the processing device 9, and a macrovision signal and CGMS-A (copy prohibition) are added to the analog video signal 10.

  FIG. 4 shows an embodiment of a video information reproducing apparatus with a small display for enjoying the small optical disk medium 23 created in FIG. 3 of the present invention outdoors. In FIG. 4, 27 is a video information playback device with a small display, 28 is a playback device of an 8 cm optical disk medium 23, 29 is a signal processing circuit for playing back the first and second video information, 30 is a small display, and 31 is a work. Copyright protection information reading circuit for copyright protection information and Veil information and digital watermark information, 32 is video information including Veil information and digital watermark information, 33 is a video signal control signal, 34 is a video signal output terminal, and 35 is an audio signal output Terminal.

  In FIG. 4, after the information recorded on the small optical disk medium 23 is read out by the optical disk reproducing device 28, the signal processing circuit 29 performs decryption of the code, image expansion, audio expansion, video signal output control, etc. The signal returned to the video signal is output to the small display 30 and the video signal output terminal 34, and the signal returned to the audio signal is output to the audio output terminal 35. The small optical disc medium is not only the optical disc medium on which the second video information, which is the low-quality video information created in FIG. 3, is recorded, but also the high-quality video information as described above in the embodiment of FIG. There is a prerecorded 8 cm optical disc medium in which the first video information and the second video information have been recorded on the same medium, and a prerecorded 8 cm optical disc medium of high quality information currently on the market. The playback device 27 with a small display can play back these 8 cm optical disk media.

  Information recorded on these 8 cm optical disk media includes a movie as high-quality video information recorded in the DVD standard and a resolution-limited movie of the present invention. It is necessary to determine which movie the signal from the camera is, and if both encryption methods are different, first determine the encryption method, perform the decryption of the encryption according to the determination result, and then video and audio Discrimination of the compression method and video resolution information are discriminated, and image decompression and audio decompression are performed according to both discrimination results. When the video signal includes the Veil information and the digital watermark information, the copyright protection information reading circuit 31 reads the copyright protection information, the Veil information, and the digital watermark information included in the video information 32, and the copyright protection information is the Veil information. Alternatively, if it does not match the digital watermark information, the signal processing circuit 29 is controlled by the video signal control signal 33, and the supply of the video signal to the small display 30 is stopped.

  When the read information is determined as high-quality video information by the signal processing circuit 29, the signal processing circuit 29 always supplies a high-quality video signal to the video output terminal 34, but the signal processing circuit 29 is a small optical disc. When the information read from the medium 23 is determined to be low image quality video information, the supply of the video signal to the video signal output terminal 34 is stopped. The video information playback device 27 with a small display of the present invention shown in FIG. 4 is a video information playback device with a small display that is easy to carry. In addition to enjoying it, it is possible to connect to a large indoor display.

  In the embodiment of FIG. 4, when the read information is determined as high-quality video information by the signal processing circuit 29, a video signal and an audio signal are output from the video signal output terminal 34 and the audio signal output terminal 35, respectively. However, the signal processing circuit 29 may be provided with a digital signal output terminal (not shown in the drawings) for outputting a bit stream signal including a compressed video signal and an audio signal after error correction. . As the digital signal output terminal, there is a 1394 with a copyright protection function that can transmit the copyright protection information of the video signal. Also, as a digital signal output terminal, HDMI (High-Definition) that outputs digital data including a baseband video signal and an audio signal that have been subjected to image expansion and audio expansion by the signal processing circuit 29, instead of a compressed bit stream signal. (Multimedia Interface) may be provided. As an output terminal, the digital signal output terminal described above may be provided instead of the video signal output terminal 34 and the audio signal output terminal 35, or a digital signal output terminal may be added.

  3 of the present invention is an embodiment of the playback device 28 for the optical disk medium 23. Although not shown, a playback device for playing back video information recorded in the flash memory card 12 or the HDD 13 as a playback device. It may be used.

  As described above, according to the present invention, video information such as a movie that can be enjoyed on a small display or the like is added to an existing medium such as a DVD by a resolution limitation or a high compression ratio that allows the copyright owner to permit secondary use. It can be recorded, and for copyright owners, it can realize a pre-recorded business such as movies with added value, and general consumers can easily use movies with small media and small displays even outdoors. You can enjoy video information.

  Further, according to the present invention, digital information of a predetermined resolution (or a predetermined compression rate) and digital information of a lower resolution (or a higher compression rate) than the predetermined resolution are related to the resolution and the compression rate, respectively. Different copyright protection information, for example, copyright protection information such as copy prohibition is added to digital information with a predetermined resolution or compression rate, and copy once or move is applied to digital information with a lower resolution or higher compression rate than the predetermined resolution. Protects copyright and benefits the copyright holder in order to add copyright protection information that is less restrictive than copyright protection information added to digital information of any given resolution or compression rate possible At the same time, it can contribute to user benefits.

  The present invention reproduces a small optical disk medium that reproduces a small optical disk medium even outdoors or the like and enjoys video information such as a movie on a small display, and reproduces the small optical disk medium copied with low-resolution video information with limited resolution. It is effective for a system that can

The figure which shows the Example of the optical disc medium by which the video information recording of this invention was carried out The block diagram which shows the Example of the reproducing | regenerating apparatus of the optical disk medium by which the video information was recorded of this invention The block diagram which shows the Example of the recording device of the video information of this invention The block diagram which shows the Example of the small disc playback apparatus with a small display of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical disk medium, 2 ... Recording area of 1st video information, 3 ... Recording area of 2nd video information, 5 ... Optical disk apparatus, 6 ... Reading apparatus, 7 ... Optical head, 8 ... Digital signal processing circuit, 9 ... Signal processing device, 12 ... Flash memory card, 13 ... HDD, 14 ... first digital data, 15 ... second digital data, 21 ... copyright information adding circuit, 22 ... copyright information reading circuit, 23 ... diameter 8 cm optical disk medium, 24 ... signal selection circuit, 28 ... optical disk playback device, 29 ... signal processing circuit, 30 ... small display

Claims (20)

A recording method for recording two or more pieces of image information having different resolutions,
Add copyright protection information related to the resolution of the image information,
A recording method, wherein image information to which copyright protection information related to the resolution is added is recorded. An output method for reproducing and outputting the image information from a recording medium on which two or more image information having different resolutions are recorded,
Playing back image information with copyright protection information related to the resolution of the image information,
An output method characterized in that output is performed with different output destinations according to the resolution of the reproduced image information. A recording method for recording first image information having a predetermined resolution and second image information having a lower resolution than the predetermined resolution,
Adding first copyright protection information to the first image information;
The second image information is appended with second copyright protection information that is less restrictive than the first copyright protection information,
A recording method comprising: recording the first image information to which the first copyright protection information is added and the second image information to which the second copyright protection information is added. The output method according to claim 2, wherein
When the resolution of the reproduced image information is a predetermined resolution, the reproduced image information is output to the outside,
An output method comprising: outputting the reproduced image information to a non-external display when the resolution of the reproduced image information is lower than a predetermined resolution. A recording method for recording two or more digital information with different compression rates,
Add copyright protection information related to the compression ratio of the digital information,
A recording method comprising: recording the digital information to which copyright protection information related to the compression rate is added. An output method for reproducing and outputting the digital information from a recording medium on which two or more digital information having different compression rates are recorded,
Reproducing digital information with copyright protection information related to the compression ratio of the digital information,
An output method, wherein the output destination is changed according to a compression rate of the reproduced digital information. A recording method for recording first digital information having a predetermined compression ratio and second digital information having a higher compression ratio than the predetermined compression ratio,
Adding first copyright protection information to the first digital information;
The second digital information is added with second copyright protection information having a lower limit than that of the first copyright protection information,
A recording method comprising: recording the first digital information to which the first copyright protection information is added and the second digital information to which the second copyright protection information is added. The output method according to claim 2, wherein
When the compression ratio of the reproduced digital information is a predetermined compression ratio, the reproduced digital information is output to the outside,
An output method comprising outputting the reproduced digital information to a non-external display when a compression rate of the reproduced digital information is lower than a predetermined compression rate. A recording method for recording two or more digital information in different formats,
Add copyright protection information related to the format of the digital information,
A recording method comprising recording digital information to which copyright protection information related to the format is added. The recording method according to claim 3,
High-resolution image information adds copyright protection information with a high degree of restriction compared to low-resolution image information, and low-resolution image information is a copyright with a low degree of restriction compared to high-resolution image information. A recording method characterized by adding protection information to both the interests of the copyright holder and the user. The recording method according to claim 7, wherein
Digital information with a low compression ratio adds copyright protection information with a high degree of restriction compared to digital information with a high compression ratio. Digital information with a high compression ratio has a degree of restriction compared with digital information with a low compression ratio. A recording method characterized by contributing to both the interest of the copyright holder and the benefit of the user by adding copyright protection information with a low level of copyright. A recording medium on which two or more pieces of image information having different resolutions are recorded,
A recording medium on which image information in which copyright protection information related to the resolution of the image information is added to each image information is recorded. First image information to which the first copyright protection information is added;
Second image information to which the second copyright protection information having a lower limit than the first copyright protection information is added is recorded,
The recording medium, wherein the first image information has a higher resolution than the second image information. First digital information to which the first copyright protection information is added;
And second digital information to which second copyright protection information having a lower degree of restriction than the first copyright protection information is added,
The recording medium, wherein the second digital information is compressed at a higher compression ratio than the first digital information. The recording method according to claim 3, wherein
The first image information to which the first copyright protection information is added and the second image information to which the second copyright protection information is added are recorded in different areas on a recording medium. Recording method. The recording method according to claim 7, comprising:
The first digital information to which the first copyright protection information is added and the second digital information to which the second copyright protection information is added are recorded in different areas on a recording medium. Recording method.   15. The recording medium according to claim 14, wherein the first digital information and the second digital information are recorded in different areas. Both the video information of the first video information having the first resolution and the first copyright protection information and the second video information having the second resolution and the second copyright protection information are stored in at least the same medium. In the recording / playback system for video information to be recorded, the first resolution is selected to be at least twice the second resolution, and the first copyright protection information is more restricted in copyright than the second copyright protection information. A video information recording / playback system for video information, characterized by being selected according to conditions. 19. The video information recording / reproducing system according to claim 18, wherein the first video information is compressed by the first image compression method, the second video information is compressed by the second image compression method, and the second video information is compressed. A video information recording / reproducing system for video information, wherein the second image compression method is selected so that the image data compression rate of the image compression method is higher than the image data compression rate of the first image compression method. 19. The video information recording / reproducing system for video information according to claim 18, wherein the second audio information accompanying the second video information is recorded after being compressed by the second audio compression method and is also attached to the first video information. The first audio information to be compressed is recorded after being compressed by the first audio compression method, and the audio data compression rate of the second audio compression method is set higher than the audio data compression rate of the first audio compression method. 2. A video information recording / reproducing system for video information, wherein the audio compression method is selected.

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