SYSTEMS AND METHODS FOR CONTENT PLAYBACK AND RECORDING

• US 20090319807A1
• Filed: 06/11/2009
• Published: 12/24/2009
• Est. Priority Date: 06/19/2008
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: RealNetworks, Inc.
• Inventors: Hastings, Steve, Chasen, Jeff, Buzzard, Jeff, Graham, Timothy, Leitner, Jeff
• Granted Patent: US 8,555,087 B2
• Time in Patent Office: Days
• 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;

obtaining encrypted media content from a recorded medium;

concurrently with obtaining the encrypted media content;

reencrypting the 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 encrypted 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;

obtaining media content from a recorded medium;

concurrently with obtaining the media content;

decrypting the media content using a first key;

reencrypting the media content using a second key;

storing the reencrypted media content in a storage device;

decrypting the stored media content using the second key; and

outputting the decrypted media content to a display device.

13. A system comprising:

a reader component to obtain media content from a recorded medium;

an encryption component to reencrypt the media content using a secondary encryption key;

a storage component to store the reencrypted media content;

a first decryption component to decrypt the reencrypted media content stored in the storage device using the secondary encryption key to recover the encrypted media content;

a second decryption component to 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 media content are performed concurrently for at least a portion of the 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 media content is obtained from the recorded media at a higher rate than the 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.

22. The system of claim 13, wherein the first and second decryption components are components of a single device or application.

23. A method comprising:

using a computer to perform the steps of;

detecting that a recorded medium including media content has been inserted into a media reader;

copying the media content from the recorded medium to a storage device without a user command to copy the media content;

in response to a user command to play back the media content, retrieving and playing back the media content from the storage device,

wherein at least a portion of the media content is played back from the storage device concurrently with the media content being copied from the recorded medium.

24. The method of claim 23, further comprising making the stored media content available for playback after the recorded medium has been removed from the media reader.

25. The method of claim 24, 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.

26. A system comprising:

a reader component for detecting a recorded medium being inserted into a media reader and for copying the media content from the recorded medium to a storage device without a user command to copy the media content;

a playback component for playing back the media content from the storage device in response to a user command,

wherein at least a portion of the media content is played back from the storage device concurrently with the media content being copied from the recorded medium.

27. A method comprising:

using a computer to perform the steps of;

reading media content from a recorded medium;

storing the media content in a storage device concurrently with reading the media content; and

playing back the media content from the storage device concurrently with storing the media content,

wherein the reading, storing, and playing back of the media content are initiated by a single user command.

28. The method of claim 27, wherein the single user command is a command to play back the media content from the recorded medium.

29. The method of claim 27, further comprising making the stored media content available for subsequent playback without the recorded medium by performing the steps of:

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.

30. A system comprising:

a reader to read media content from a recorded medium;

a storage device to store the media content concurrently with the reading of the media content; and

a playback component to play back the media content from the storage device concurrently with the storing of the media content,

wherein the reading, storing, and playing back of the media content are initiated by a single user command.

31. A method comprising:

using a computer to perform the steps of;

reading media content from a digital versatile disc (DVD) at first rate;

storing the media content in a hard drive concurrently with reading the media content;

playing back the media content from the hard drive concurrently with storing the media content, wherein the media content is played back from the storage device at a second rate that is lower than the first rate.

32. The method of claim 31, wherein the media content is subdivided on the DVD into one or more cells, each cell comprising a plurality of sectors, and wherein reading comprises:

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

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

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

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

skipping to a next cell to continue reading the media content.

33. The method of claim 32, wherein the threshold value is 10.

34. The method of claim 32, wherein the threshold value is user-selectable.

35. The method of claim 32, wherein marking comprises storing an indication that the cell is a bad cell in a data allocation map.

36. The method of claim 33, further comprising storing the data allocation map in the hard drive.

37. A system comprising:

a digital versatile disc (DVD) reader for reading media content from a DVD at first rate;

a hard drive for storing the media content concurrently with the reading of the media content; and

playback device for playing back the media content from the hard drive concurrently with the storing of the media content, wherein the media content is played back from the hard drive at a second rate that is lower than the first rate.

38. A method comprising:

using a computer to perform the steps of;

reading blocks of media content starting from a first location of a recorded medium;

concurrently with reading the media content;

storing a copy of each block read from the recorded medium in a storage device;

marking which blocks of the recorded medium have been stored in a data allocation map; and

playing back the media content from the storage device.

39. The method of claim 38, further comprising:

in response to copying the last block of the media content or in response to playback being terminated by the user, reading and storing a copy of at least one block of the recorded medium that has not been marked in the data allocation map as being stored in the storage device.

40. The method of claim 38, further comprising:

receiving a user command to skip to reading media content from a second location of the recorded medium; and

in response to the data allocation map indicating that a first block at the second location has not been stored, repeating the reading, storing, marking, and playing back steps starting from the second location.

41. The method of claim 38, further comprising:

receiving a user command to skip to reading media content from a second location of the recorded medium; and

in response to the data allocation map indicating that a first block of the second location has been stored, playing back the media content corresponding to the second location of the recorded medium from the storage device.

42. The method of claim 38, wherein the data allocation map is stored in the storage device.

43. A system comprising:

a reader component to read blocks of media content starting from a first location of a recorded medium;

a storage device to store a copy of each block read from the recorded medium concurrently with the reading of the media content, wherein the storage device is also to store a data allocation map for marking which blocks of the recorded medium have been stored; and

a playback component to play back the media content from the storage device concurrently with the reading and storing of the media content.

44. A method comprising:

using a computer to perform the steps of;

in response to detecting that a recorded medium has been provided to a media reader and without further user interaction;

determining a media identifier for the recorded medium;

using the media identifier to determine whether media content from the recorded medium has been previously stored;

in response to the media content having not been stored;

obtaining metadata for the media content from a metadata provider based on the media identifier; and

in response to a user command to play the media content;

 

reading media content from the recorded medium;

 

storing the media content in a storage device concurrently with reading the media content; and

 

playing back the media content from the storage device concurrently with storing the media content.

45. The method of claim 44, further comprising, after the step of obtaining metadata for the media content, prompting a user with at least a portion of the metadata.

46. A method comprising:

using a computer to perform the steps of;

copying a first content item from a first recorded medium;

copying a second content item from a second recorded medium;

determining respective media identifiers for the first and second recorded mediums;

using the respective identifiers to obtain metadata for the first and second content items;

determining a group association for the first and second content items from the metadata; and

representing the first and second content items as a group in a user interface.

47. The method of claim 46, further comprising, while playing back the first content item, and upon navigating beyond a last portion of the first content item, navigating to a first portion of the second content item without user input.