Extensive copy protection mechanisms and methods for video platforms and unprotected source material (APPARATUS AND METHOD FOR COMPREHENSIVE COPY PROTECTION FOR VIDEO PLATFORMS AND UNPROTECTED SOURCE MATERIAL

摘要

The digital video recording platform performs copy protection in both digital and analog areas. The copy protection includes a scrambling or scrambling circuit element. For externally provided analog video, the recorder detects copy protection and replies that recording is impossible. The anti-copy bits are detected so that recording can not be performed on the analog video provided from the outside, and scramble processing is performed in the digital part as a part of the copy protection system. Anti-copy bits are detected in the digital reproduction video while the recorded data is being reproduced, and the digital reproduction video is converted into an analog signal modified by analog video copy protection processing. The scrambling circuitry element is active when the playback system detects the anti-copy bits. New copy protection data sets and scrambling are added to the digital output device for the purpose of protecting the digital output of the recorder. The digital receiver includes a simple descrambler.;Analog or digital source video material (pre-recorded or external source) is recorded with a copy protection signature. Protecting the detection of the signature and the reproduction by the playback device of the second digital recorder implies a modification of the standard video signal reproduced using the resultant analog copy protection process. This is appropriate for a playback apparatus in which the source video can not be protected and a standard (NTSC or PAL) video signal is provided.