Apparatus for monitoring and preventing unauthorized copying of digital data

• US 6,081,897 A
• Filed: 01/13/1998
• Issued: 06/27/2000
• Est. Priority Date: 01/13/1997
• Status: Expired due to Fees

• Current Assignee: Recording Industry Association of America
• Original Assignee: Recording Industry of America
• Inventors: Bersson, Edward F.
• Primary Examiner(s): Beausoliel, Jr., Robert W.
• Assistant Examiner(s): Weir, James G.
• Application Number:
  US09/006,183
• Time in Patent Office: 896 Days
• Field of Search: 713/200, 711/4, 711/154, 711/163, 380/3, 380/4, 380/5, 380/203, 380/200, 705/57
• US Class Current: 726/32
• CPC Class Codes: G11B 19/12 by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier

Abstract

An apparatus for monitoring and preventing unauthorized copying of digital data. A recording device records digital data on a first storage medium which has been read from a second storage medium. A computer connected to said recording device and the reading device is programmed to execute premastering instructions to enable reading of data from a second storage medium in order to record the data on the first storage medium. The computer further includes instructions for inhibiting copying of the data when said data is subject to copyright by detecting a notice of copyright in the data and inhibiting the premastering instructions from reading the data which includes the copyright notice thereby preventing recording of the data on the first medium.

Claims

1. An apparatus for monitoring and preventing unauthorized copying of digital data comprising:

a recording device for recording digital data on a first storage medium;

a reading device for reading data from a second storage medium;

a computer connected to said recording device and said reading device over a bus, said computer being programmed to execute premastering instructions to enable reading of data from said second storage medium in order to record said data on said first storage medium, said computer further including instructions for inhibiting copying of said data when said data is subject to copyright comprising;

creating a table of tracks of data stored on said second medium which contains a notice of copyright to tracks of data on said second medium which contains copyrighted subject matter;

determining whether a notice of copyright has been recorded in said table of tracks for a track of data to be recorded; and

inhibiting said premastering instructions from reading said data which includes said copyright notice thereby preventing recording of said data on said first medium.

2. The apparatus according to claim 1 wherein said further instructions include reading the contents of said table when said premastering software issues a command to read one of said tracks on said second storage medium.

3. The apparatus according to claim 1 wherein said instructions issue a command to said computer to warn a user that said data is subject to copyright.

4. The apparatus according to claim 1 wherein said copyright notice is identified by a flag included in a control field of a track of stored data.

5. The apparatus according to claim 2 wherein said further instructions comprise a first hook routine which intercepts read commands which are generated by the premastering software, and a second hook routine which creates said table of tracks.

6. An apparatus for monitoring and preventing unauthorized copying of digital data comprising:

a recording device for recording digital data on a first storage medium;

a reading device for reading data from a second storage medium;

a computer connected to said recording device and said reading device over a bus, said computer being programmed to execute premastering instructions to enable reading of data from said second storage medium and to enable recording of said data on said first storage medium, said computer further including instructions for inhibiting copying of said data when said data is subject to copyright comprising;

a driver for controlling execution of commands issued by said premastering software comprising;

a first hook routine for intercepting read commands issued during execution of said premastering instructions, and sending an asynchronous procedure call to cancel said read command if said read command is directed to a copyrighted track; and

a second hook routine for creating a table of tracks of data contained in said second storage medium when a read table of contents command is intercepted by said first hook routine, said table of tracks including a flag for indicating a track contains copyrighted material; and

an application program for receiving said asynchronous procedure call and inhibiting said premastering software from executing a read command if said read command is directed to said copyrighted track.

7. The apparatus according to claim 6 wherein said first hook routine consults said table of tracks to determine whether said read command is directed to a track of copyrighted data.

8. The apparatus according to claim 6 wherein said first hook routine detects whether a play audio command is issued by said premastering software, and issues an a asynchronous command to issue a warning to a user that is attempting to play a copyrighted track.

9. The apparatus according to claim 8 further comprising a dialogue routine which communicates a warning to a user when said first hook routine issues said asynchronous command.