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Predecessor
21.31
Displaying 1-10 of 10 articles from this issue
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Article type: Cover
Pages Cover1-
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
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Article type: Index
Pages Toc1-
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (32K) -
Article type: Appendix
Pages 1-
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
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Norishige Morimoto, Syuuichi Shimizu, Seiji KobayashiArticle type: Article
Pages 3-8
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSData hiding is an invisible marking technology which allowsa user to embed his message invisibly and inandibly into digital contents such as image, video, and audio data and which allows the authorized systems or devices to detect if from the embedded contents for their proper actions such as copy and display control. The comprehensive overview of our developed data hiding technology and its varions applications such as watermarking, fingerprinting, digital signature, and copy control are presented.View full abstractDownload PDF (921K) -
Takehito ABE, Hiroshi FUJII, Kazuhiko KUSHIMAArticle type: Article
Pages 9-14
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDuring the distribution of digital images, protection against piracy is important because it is easy to duplicate digital data without deterioration and to spread pirated versions through networks. This paper presents a method for scrambling image data encoded in JPEG. Our method uses a cipher algorithm for data transformation. Its high-speed transformation enables real time descrambling, thereby preventing illegal copying. Using our method, scrambling can be controlled by the intra-block parameters, density and area. The method also allows a single image to be scrambled a number of times using different scrambling keys. Besides we propose an image distribution method using scrambled images with our experimental tools.View full abstractDownload PDF (975K) -
Makoto TATEBAYASHI, Natsume MATSUZAKI, Hideshi ISHIHARA, Yoshihisa FUK ...Article type: Article
Pages 15-19
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe DVD content scramble system (CSS) has been developed for protection of copyrighted materials on DVDs from users' unauthorized copy. The system is based on the encryption technology developed by Matsushita. The technology has been agreed by engineers in the industries of consumer electronics, motion pictures, computers, etc. through discussion in the DVD Consortium. The CSS is to prevent "casual copy" by simply connecting AV signal cables or using a computer. For this purpose, the system has the following mechanisms.(1) Content scramble : Copyrighted material (MPEG compressed content) is scrambled using three layered encryption keys. Only DVD products with licensed technology can obtain and playback the copyrighted material.(2) Bus-authentication : DVD-ROM drive and MPEG decoder module mutually authenticate through PC bus. The descrambling key is further encrypted by a time-variable key. This mechanism prevents unauthorized copy of copyrighted material on PC bus and its playback.View full abstractDownload PDF (566K) -
Tadashi Ezaki, Keiji KanotaArticle type: Article
Pages 21-26
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSCopy protection system is necessary to launch digital recording devices to the market. We proposed the Copy Generation Management System and we call its information as CGMS-D on digital interface and CGMS-A on analog interface. We proposed to transfer CGMS-A information by using the VBI lines 20 and 283 which are defined to transfer aspect ratio information for mainly packaged media. This signal format is called as Video ID format and it can transfer various video additional information.View full abstractDownload PDF (525K) -
Yasufumi Yunde, Masao KumeiArticle type: Article
Pages 27-31
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSMacrovision's Anti-Copy Process (APC) is composed of AGC pulses and Split Burst Colorstripe Process, both of which are designed to cause distorted picture when the videos with such processes are recorded by analog VCRs, while to be exempted from any playability problem when the videos with such processes are played on TVs. Both processes are invented to pay attention to the differences as to how to respond to these processes between TVs and VCRs. Whether or not ACP is generated and inserted into the videos at Digital-to-Analog Color encoder chip is managed by control bit in digital signals at the source.View full abstractDownload PDF (325K) -
Tatsuya KURIOKA, Hiroki MINAMI, Haruo OKUDA, Junji NUMAZAWA, Akio YANA ...Article type: Article
Pages 33-38
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe propose a new concept of the Home Server to realize ISDB "anytime" services. The Home Server must be able to provide two contrasting functions at the same time -- one for the processing of programs to be constantly updated, and the other for programs to be kept in a video library. The recording medium must provide highspeed random access to the former, while possessing a large recording capacity for the latter. To satisfy these two requirements, we have developed a new Hierarchical Storage Management System for the Home Server.View full abstractDownload PDF (618K) -
Article type: Appendix
Pages App1-
Published: May 22, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (68K)
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