What are the copy protection issues?
There are four forms of copy protection used by DVD: 1) Analog CPS (Macrovision) Videotape (analog) copying is prevented with a Macrovision 7.0 or similar circuit in every player. The general term is APS (Analog Protection System). Computer video cards with composite or s-video (Y/C) output must also use APS. Macrovision adds a rapidly modulated colorburst signal (“Colorstripe”) along with pulses in the vertical blanking signal (“AGC”) to the composite video and s-video outputs. This confuses the synchronization and automatic-recording-level circuitry in 95% of consumer VCRs. Unfortunately, it can degrade the picture, especially with old or nonstandard equipment. Macrovision may show up as stripes of color, distortion, rolling, black & white picture, and dark cycling. Macrovision creates severe problems for most line doublers. Macrovision is not present on analog component video output of early players, but is required on newer players such as the Sony S7000 (AGC only, since there is n
There are four forms of copy protection used by DVD: 1) Analog CPS (Macrovision) Videotape (analog) copying is prevented with a Macrovision 7.0 or similar circuit in every player. The general term is APS (Analog Protection System). Computer video cards with composite or s-video (Y/C) output must also use APS. Macrovision adds a rapidly modulated colorburst signal (“Colorstripe”) along with pulses in the vertical blanking signal (“AGC”) to the composite video and s-video outputs. This confuses the synchronization and automatic-recording-level circuitry in 95% of consumer VCRs. Unfortunately, it can degrade the picture, especially with old or nonstandard equipment. Macrovision may show up as stripes of color, distortion, rolling, black & white picture, and dark/light cycling. Macrovision creates problems for many line doublers. Macrovision is not present on analog component video output of early players, but is required on newer players (AGC only, since there is no burst in a component s
There are three forms of copy protection used by DVD: 1) Videotape (analog) copying is prevented with a Macrovision 7.0 or similar circuit in every player. The general term is APS (Analog Protection System). Computer video cards with composite or s-video (Y/C) output must also use APS. Macrovision adds a rapidly modulated colorburst signal (“Colorstripe”) along with pulses in the vertical blanking signal (“AGC”) to the composite video and s-video outputs. This confuses the synchronization and automatic-recording-level circuitry in 95% of consumer VCRs. Unfortunately, it can degrade the picture, especially with old or nonstandard equipment. Macrovision may show up as stripes of color, distortion, rolling, black & white picture, and dark cycling. Macrovision creates severe problems for most line doublers. Macrovision is not present on analog component video output of early players, but is required for newer players such as the Sony S700 (AGC only, since there is no colorburst in a compon
CPSA (content protection system architecture) is the name given to the overall framework for security and access control across the entire DVD family. Developed by the “4C” entity (Intel, IBM, Matsushita, and Toshiba) in cooperation with the Copy Protection Technical Working Group (CPTWG), it covers encryption, watermarking, protection of analog and digital outputs, and so on. There are many forms of content protection that apply to DVD. 1) Analog CPS (Macrovision) Videotape (analog) copying is prevented with a Macrovision 7.0 or similar circuit in every player. The general term is APS (Analog Protection System), also sometimes called copyguard. Computer video cards with composite or s-video (Y/C) output must also use APS. Macrovision adds a rapidly modulated colorburst signal (“Colorstripe”) along with pulses in the vertical blanking signal (“AGC”) to the composite video and s-video outputs. This confuses the synchronization and automatic-recording-level circuitry in 95% of consumer V
