Optical disc technology has been developed signifi cantly since the early 1980s.Optical disc has become the main distribution approaches in the areas of music,software,electric book and movie,thus the protection of In...Optical disc technology has been developed signifi cantly since the early 1980s.Optical disc has become the main distribution approaches in the areas of music,software,electric book and movie,thus the protection of Intelligence Protection(IP)is a very important topic.In order to prevent users or hackers from piracy,more and more optical disc encryption techniques have been proposed.This article is an overview of this technology.Firstly,the feature of optical disc encryption is analyzed.Then several important encryption technologies are introduced.In the end,the content protection technologies used for the third generation optical disc with blue lasers are introduced,including Advanced Access Content System(AACS)and Self-Protecting Digital Content(SPDC).展开更多
This paper describes the Single-chip LSI for HD DVD/DVD/CD which we have developed. Since the demand for high-capacity media that can record high-def inition movies for an extended time is increasing, HD DVD has been ...This paper describes the Single-chip LSI for HD DVD/DVD/CD which we have developed. Since the demand for high-capacity media that can record high-def inition movies for an extended time is increasing, HD DVD has been rapidly developed as the next-generation DVD. To achieve downsizing and low power consumption of the LSI, we developed a single-chip LSI which includes an HD DVD signal processing circuit, DVD/CD signal processing circuit and CPU. The new Digital Read Channel provides high readout performance for HD DVD signal which has high inter-symbol interference. A progressed ECC (Error Correction Code) Core contributes to the LSI downsizing.展开更多
文摘Optical disc technology has been developed signifi cantly since the early 1980s.Optical disc has become the main distribution approaches in the areas of music,software,electric book and movie,thus the protection of Intelligence Protection(IP)is a very important topic.In order to prevent users or hackers from piracy,more and more optical disc encryption techniques have been proposed.This article is an overview of this technology.Firstly,the feature of optical disc encryption is analyzed.Then several important encryption technologies are introduced.In the end,the content protection technologies used for the third generation optical disc with blue lasers are introduced,including Advanced Access Content System(AACS)and Self-Protecting Digital Content(SPDC).
文摘This paper describes the Single-chip LSI for HD DVD/DVD/CD which we have developed. Since the demand for high-capacity media that can record high-def inition movies for an extended time is increasing, HD DVD has been rapidly developed as the next-generation DVD. To achieve downsizing and low power consumption of the LSI, we developed a single-chip LSI which includes an HD DVD signal processing circuit, DVD/CD signal processing circuit and CPU. The new Digital Read Channel provides high readout performance for HD DVD signal which has high inter-symbol interference. A progressed ECC (Error Correction Code) Core contributes to the LSI downsizing.
