FIELD: method for copying audio and/or video (AV) stream and device for copying an AV-stream.
SUBSTANCE: device for copying an AV-stream contains AV-stream copying controller, which, if inputted copying command does not match copy control information (CCI) of AV-stream, outputs command to input a CCI-coupon, which includes new value of CCI, extracts new value of CCI from CCI-coupon and outputs command to copy the AV-stream; device for input of CCI-coupon, which inputs CCI-coupon according to CCI-coupon input command of AV-stream copying controller; and block for copying AV-stream, which changes CCI of AV-stream according to command for copying AV-stream of controller for copying AV-stream and extracted CCI and copies the AV-stream.
EFFECT: ensured selective copying of AV-stream and prevented unlawful alterations of copy control information.
2 cl, 11 dwg
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