METHOD AND A DEVICE FOR CONTROLLING COPY OF ENCODED DIGITAL DATA AND A COPY SYSTEM, SPECIALLY ENABLING PROTECTION OF A COPYRIGHT BY PROHIBITING OR LIMITING A COPY, DUBBING OR REPRODUCTION OF COPYRIGHTED DIGITAL DATA

摘要

PURPOSE: A method and a device for controlling copy of encoded digital data and a copy system are provided to easily control a permitting, limiting, or prohibiting of digital data by using protection information and copy permission information, thereby controlling a recording of video images even though the video images are seen on TV or monitor. CONSTITUTION: Reproduced data is outputted to a recording device(2). Protection information is stored in digital data of a pre-recorded tape which is mounted on a reproduction device(1). The protection information shows whether to permit or prohibit dubbing by the recording device(2), and is transmitted together with AV data or DTV data. Information for controlling a reproduction of encoded digital data is received from a remote place. Based on the received control information, a decoding of the digital data is prohibited.