Systems and methods for content playback and recording

• US 8,555,087 B2
• Filed: 06/11/2009
• Issued: 10/08/2013
• Est. Priority Date: 06/19/2008
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Chasen, Jeff, Leitner, Jeff, Buzzard, Jeff, Graham, Timothy, Hastings, Steve
• Primary Examiner(s): LE, CHAU D
• Application Number:
  US12/483,107
• Publication Number:
  US 20090319807A1
• Time in Patent Office: 1,580 Days
• Field of Search: 713/189, 713/193, 726/26, 380/200, 380/201, 705/51, 705/57, 386/259, 386/232, 386/354
• US Class Current: 713/193
• 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
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: G11B 27/36 Monitoring, i.e. supervising the progress of recording or reproducing for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06
• CPC Class Codes: G11B 7/28 Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/42646 for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
• CPC Class Codes: H04N 21/42684 Client identification by a unique number or address, e.g. serial number, MAC address, socket ID network arrangements, protocols or services for addressing or naming H04L61/00
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73

Abstract

A method for content playback and recording may include using a computer to obtain media content from a recorded medium. Concurrently with obtaining the media content, the method may include reencrypting the encrypted media content using a secondary encryption key and storing the reencrypted media content in a storage device.

Claims

1. A method comprising:

using a computer to perform the steps of;

reading encrypted media content from a recorded medium, the encrypted media content being subdivided on the recorded medium into one or more cells, each cell comprising a plurality of sectors, wherein reading the encrypted media content comprises;

tracking failed attempts to read one or more sectors of a particular cell in a bad sector counter, including;

in response to encountering an unreadable sector, incrementing the bad sector counter for the particular cell; and

in response to encountering a readable sector, clearing the bad sector counter for the particular cell;

in response to the bad sector counter exceeding a threshold value for the particular cell;

marking the particular cell as a bad cell, such that subsequent copying of the particular cell is not attempted;

clearing the bad sector counter; and

skipping to a next cell to continue reading the encrypted media content; and

concurrently with reading the encrypted media content;

copying the encrypted media content from the recorded medium, not including cells that have been marked as a bad cell;

reencrypting the copied encrypted media content using a secondary encryption key; and

storing the reencrypted media content in a storage device.

2. The method of claim 1, further comprising:

concurrently with storing the reencrypted media content;

decrypting the reencrypted media content using the secondary encryption key to recover the encrypted media content;

decrypting the encrypted media content using a primary encryption key to recover decrypted media content; and

outputting the decrypted media content to a display device.

3. The method of claim 1, wherein the secondary encryption key is derived from an identifier associated with the computer.

4. The method of claim 3, wherein the identifier comprises a MAC address.

5. The method of claim 3, wherein the identifier comprises a disc identifier.

6. The method of claim 1, wherein the secondary encryption key is derived from a license associated with a software application for outputting the decrypted media content.

7. The method of claim 1, wherein the recorded medium comprises a digital versatile disc (DVD).

8. The method of claim 1, wherein the media content is obtained from the recorded media at a higher rate than the media content is output to the display device.

9. The method of claim 1, further comprising making the stored media content available for subsequent playback without the recorded medium.

10. The method of claim 9, wherein making the stored media content available comprises:

determining a media identifier associated with the recorded medium or media content;

using the media identifier to obtain metadata relating to the stored media content through a network; and

associating the metadata with the stored media content in the storage device, wherein at least a portion of the metadata is displayable in a user interface to enable selection of the stored media content.

11. The method of claim 9, wherein the media content is obtained from the recorded medium and made available for subsequent playback without a prior copying step that occurs separate from playback of the media content.

12. A method comprising:

using a computer to perform the steps of;

reading media content from a recorded medium, the media content being subdivided on the recorded medium into one or more cells, each cell comprising a plurality of sectors, wherein reading the media content comprises;

in response to encountering an unreadable sector, incrementing a bad sector counter for a current cell containing the bad sector;

in response to encountering a readable sector, clearing the bad sector counter; and

in response to the bad sector counter exceeding a determined threshold value;

marking the current cell as a bad cell, such that subsequent copying of the current cell is not attempted; and

skipping to a next cell to continue reading the media content; and

concurrently with reading the media content;

decrypting the media content using a first key;

reencrypting the media content using a second key;

copying the reencrypted media content, not including cells that have been marked as a bad cell, to a storage device;

decrypting the copied media content using the second key; and

outputting the decrypted media content to a display device.

13. A system comprising:

a reader component to read encrypted media content from a recorded medium, the encrypted media content being subdivided on the recorded medium into one or more cells, each cell comprising a plurality of sectors;

a bad sector counter, comprising a processor couple to memory, to track bad sectors in each cell, the bad sector counter configured to;

increment the bad sector counter for the current cell in response to encountering an unreadable sector; and

clear the bad sector counter for the current cell in response to encountering a readable sector;

wherein in response to the bad sector counter exceeding a threshold value for a current cell, the reader component is configured to;

mark the current cell as a bad cell, such that the reader component does not subsequently attempt to copy the current cell; and

skip to a next cell to continue obtaining the encrypted media content;

a security and licensing code stored on a memory device to;

copy the encrypted media content, not including cells that have been marked as a bad cell; and

reencrypt the copied encrypted media content using a secondary encryption key;

a storage component to store the reencrypted media content in a storage device;

the security and licensing module further to;

decrypt the reencrypted media content stored in the storage device using the secondary encryption key to recover the encrypted media content; and

decrypt the encrypted media content using a primary encryption key to recover decrypted media content; and

a playback component to output the decrypted media content to a display device, wherein the obtaining, reencrypting, storing, decrypting, and outputting of the encrypted media content are performed concurrently for at least a portion of the encrypted media content.

14. The system of claim 13, wherein the secondary encryption key is derived from an identifier associated with the computer.

15. The system of claim 14, wherein the identifier comprises a MAC address.

16. The system of claim 14, wherein the identifier comprises a disc identifier.

17. The system of claim 13, wherein the secondary encryption key is derived from a license associated with a software application for outputting the decrypted media content.

18. The system of claim 13, wherein the recorded medium comprises a digital versatile disc (DVD).

19. The system of claim 13, wherein the encrypted media content is obtained from the recorded media at a higher rate than the decrypted media content is output to the display device.

20. The system of claim 13, further comprising a user interface component to make the stored media content available for subsequent playback without the recorded medium.

21. The system of claim 20, further comprising a metadata component to determine a media identifier associated with the recorded medium or media content, use the media identifier to obtain metadata relating to the stored media content through a network, and associate the metadata with the stored media content in the storage device, wherein at least a portion of the metadata is displayable in the user interface to enable selection of the stored media content.