Patent ID: 6928040
Filing Date: 2005-08-09
Classification: G11B

Abstract:
1. A method of marking a compact disc, comprising the acts of: providing copy protection data identifying a particular copy protection scheme from a plurality of copy protection schemes; formatting at least part of the copy protection data to form at least one copy protection data block conforming to Q subcode channel data block format; identifying a portion of the compact disc; and applying the at least one copy protection data block to the identified portion of the disc as at least one Q subcode channel data block having a Q subcode mode field encoded with a Q subcode mode value, the at least one Q subcode channel data block further having a Q control field encoded with a Q control value, the Q subcode mode value and the Q control value jointly identifying the particular copy protection scheme; wherein the Q control value has a binary value wherein a value of zero is assigned to the bit of the Q control value representing the unity power of two and the Q subcode mode value is hexadecimal 1.