AUDIO/VIDEO STREAM PROCESSING SYSTEM AND METHOD FOR DATA COPY PROTECTION

摘要

An AV stream processing system includes an AV stream input unit which receiv es an AV stream having an AV content information field including first copy control information, and an AV content field including second copy control information, a determination unit which extracts the first and second copy control information from the received AV stream and determines whether the first copy control information has been modified, and an AV stream decryptio n unit which processes the received AV stream according to predetermined criteria, when the first copy control information has been modified.