Rewind Playback of Media

• US 20090196572A1
• Filed: 02/04/2008
• Published: 08/06/2009
• Est. Priority Date: 02/04/2008
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Sadovsky, Vladimir, Burg, David
• Application Number:
  US12/025,536
• Publication Number:
  US 20090196572A1
• Time in Patent Office: Days
• US Class Current: 386/278
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• 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: H04L 65/1059 End-user terminal functionalities specially adapted for real-time communication
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 65/764 at the destination reformatting of additional data in video clients H04N21/4355
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04N 21/4135 external recorder interface circuits between an apparatus for recording television signals and a television receiver H04N5/775
• CPC Class Codes: H04N 21/4331 Caching operations, e.g. of an advertisement for later insertion during playback
• CPC Class Codes: H04N 21/43622 Interfacing an external recording device
• CPC Class Codes: H04N 21/47217 for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks specific graphical features in visual interfaces H04N21/4312
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate

Abstract

Systems and methods of media optimization are disclosed herein. An operation command can be sent to a media device from a host device. The operation command can be indicative of an intent to perform an operation on the recording medium. A list of media device characteristics corresponding to media device resources can be received from the media device. One or more selections of values of the media device characteristics can be sent from the host device to the media device in order to optimize the operation command. A response can be received from the media device of performance of the operation command.

Claims

1. A method of performing rewind playback, comprising:

sending to a media device a rewind playback command from a host device, the rewind playback command being indicative of a request to playback media stored in a recording medium in reverse order;

receiving a list of rewind playback speeds from the media device;

selecting a rewind playback speed;

sending the selected playback rewind speed from the host device to the media device, the playback rewind speed being a selection of speed from the list of rewind playback speeds;

receiving a first data block from the media device, the first data block being at a first data block starting address in the recording medium; and

receiving a second data block from the media device, the second data block starting address being less than the first data block starting address of the first data block.

2. The method of claim 1, further comprising:

playing back the first data block and the second data block.

3. The method of claim 1, further comprising:

receiving a third data block from the media device, the third data block being previously cached in memory by the media device.

4. The method of claim 1, further comprising:

determining a size of the first data block and communicating the size of the first data block to the host device.

5. The method of claim 1, further comprising:

negotiating a size of the first data block with the host device so as to optimize transfer speed or reliability.

6. The method of claim 1, wherein selecting the rewind playback speed is performed according to a user input.

7. The method of claim 1, wherein selecting the rewind playback speed is performed according to the size of the data.

8. A method of performing rewind playback by a media device, comprising:

receiving at a media device a rewind playback command from a host device, the playback command being indicative of a request to playback media stored in a recording medium in reverse order;

reading a first data block from the recording medium, the first data block being at a first data block starting address in the recording medium;

sending the first data block to the host device;

jumping to a location in the recording medium having a location address that is less than a second data block starting address of a second data block, the second data block starting address being less than the first data block starting address of the first data block;

reading additional data from the recording medium, the additional data being read starting at the location address to the second data block starting address;

reading the second data block from the recording medium; and

sending the second data block to the host device.

9. The method of claim 8, further comprising:

storing the additional data read from the recording in temporary memory.

10. The method of claim 9, further comprising:

upon receiving a subsequent read command to read at least a portion of the additional data, sending the temporary data to the host device.

11. The method of claim 8, further comprising:

sending a list of rewind playback speeds to the host device;

receiving a playback rewind speed from the host device, the playback rewind speed being a selection of speed from the list of rewind playback speeds.

12. The method of claim 8, further comprising:

determining a size of the first data block and communicating the size of the first data block to the host device.

13. The method of claim 8, further comprising:

negotiating a size of the first data block with the host device.

14. A method of performing rewind playback by a media device, comprising:

receiving at a media device a rewind playback command from a host device, the playback command being indicative of a request to playback media stored in a recording medium in reverse order;

reading a first data block from the recording medium, the first data block being at a first data block starting address in the recording medium;

sending the first data block to the host device;

jumping to a location in the recording medium having a location address that is less than a second data block starting address of a second data block, the second data block starting address being less than the first data block starting address of the first data block;

reading additional data from the recording medium, the additional data being read starting at the location address to the second data block starting address;

reading the second data block from the recording medium;

sending the second data block to the host device;

sending a list of rewind playback speeds to the host device; and

receiving a playback rewind speed from the host device, the playback rewind speed being a selection of speed from the list of rewind playback speeds.

15. The method of claim 14, further comprising:

storing the additional data read from the recording in temporary memory.

16. The method of claim 15, further comprising:

upon receiving a subsequent read command to read at least a portion of the additional data, sending the temporary data to the host device.

17. The method of claim 14, further comprising:

determining a size of the first data block and communicating the size of the first data block to the host device.

18. The method of claim 14, further comprising:

negotiating a size of the first data block with the host device.

19. A method of optimizing media operation, comprising:

sending to a media device an operation command from a host device, the operation command being indicative of an intent to perform an operation on the recording medium;

receiving a list of media device characteristics, the media device characteristics corresponding to media device resources such that the media device can optimize the operation command;

sending from the host device to the media device one or more selections of values of the media device characteristics in order to optimize the operation command; and

receiving a response from the media device of performance of the operation command.

20. The method of claim 19, wherein the characteristics include playback speeds, optimal size of input operation data, and alignment properties.