Live content streaming using file-centric media protocols

• US 7,844,723 B2
• Filed: 02/13/2007
• Issued: 11/30/2010
• Est. Priority Date: 02/13/2007
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bowra, Todd, Speicher, Ashley, Fang, Nicholas
• Primary Examiner(s): Pwu; Jeffrey
• Assistant Examiner(s): TAHA, SHUKRI ABDALLAH
• Application Number:
  US11/706,624
• Publication Number:
  US 20080195746A1
• Time in Patent Office: 1,386 Days
• Field of Search: 709/231
• US Class Current: 709/231
• CPC Class Codes: H04L 12/2805 Home Audio Video Interoperability [HAVI] networks
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2012/2849 Audio/video appliances
• CPC Class Codes: H04L 65/1026 at the edge
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate

Abstract

Described herein is technology for, among other uses, performing playback of dynamic content using protocols designed for playback of fixed-length files. The technology involves strategically updating the duration of the content during playback under various conditions. During playback, as the playback position approaches the duration, the duration is refreshed. Also, during playback the rate at which the duration is increasing is used to predict the duration and thus smoothly report the duration to the user. Upon receiving a seek request, if the request is beyond the current duration, the duration will be refreshed to avoid unnecessarily limiting the seek request.

Claims

1. A method for performing playback of dynamic media content comprising:

receiving a portion of dynamic media content encoded and streamed by a media server at a display device and a content duration of the portion of dynamic media content received at the display device, wherein the portion is encoded by the media server from a format unsupported by the display device into a format supported by the display device and streamed to the display device before all of the dynamic media content has been encoded by the media server;

detecting playback of available dynamic media content by the display device, wherein content duration of the available dynamic media content is initially reported as the content duration of the portion of dynamic media content received at the display device;

receiving increasing available dynamic media content at the display device during the playback as the dynamic media content is encoded and streamed by the media server, wherein the increasing available dynamic media content is received at the display device during the playback at a rate at which the dynamic media content is encoded and made available for streaming to the display device;

checking a current playback position of the available dynamic media content;

determining whether to initiate end of stream procedures by comparing the current playback position of the available dynamic media content with the content duration of the available dynamic media content; and

initiating the end of stream procedures only if the content duration of the available dynamic media content has not increased so that the playback of the available dynamic media content by the display device is uninterrupted, wherein the content duration of the available dynamic media content is increased as the playback position approaches the content duration of the available dynamic media content during the playback and is updated based on the increasing available dynamic media content received at the display device during the playback.

2. The method as recited in claim 1 wherein the available dynamic media content received at the display device is stored within a dynamic media file.

3. The method as recited in claim 1 wherein the content duration of the available dynamic media content is updated at regular intervals.

4. The method as recited in claim 1 wherein the dynamic media content encoded by the media server is from a real-time source.

5. The method as recited in claim 4 wherein the dynamic media content encoded by the media server is from a real-time source of television content.

6. The method as recited in claim 1 wherein the dynamic media content is encoded by the media server after being decoded by the media server.

7. The method as recited in claim 1 wherein the dynamic media content is transferred to the display device using a protocol designed for playing fixed-length files.

8. A method for handling seek requests during dynamic media content playback comprising:

receiving a portion of dynamic media content encoded and streamed by a media server at a display device and a content duration of the portion of dynamic media content received at the display device, wherein the portion is encoded by the media server from a format unsupported by the display device into a format supported by the display device and streamed to the display device before all of the dynamic media content has been encoded by the media server;

detecting playback of available dynamic media content by the display device, wherein content duration of the available dynamic media content is initially reported as the content duration of the portion of dynamic media content received at the display device;

receiving increasing available dynamic media content at the display device during the playback as the dynamic media content is encoded and streamed by the media server, wherein the increasing available dynamic media content is received at the display device during the playback at a rate at which the dynamic media content is encoded and made available for streaming to the display device;

receiving a seek request to move to a position beyond the content duration of the available dynamic media content during the playback of the available dynamic media content;

increasing the content duration of the available dynamic media content to an updated content duration based on the increasing available dynamic media content received at the display device during the playback;

performing the seek request; and

continuing the playback of the available dynamic media content from an updated playback position based on the updated content duration.

9. The method as recited in claim 8 wherein the available dynamic media content received at the display device is stored within a dynamic media file.

10. The method as recited in claim 8 further comprising:

limiting the updated playback position to be less than or equal to the updated content duration.

11. The method as recited in claim 8 wherein the dynamic media content is streamed by the media server over a communication medium using file-centric media streaming protocols.

12. The method as recited in claim 8 wherein the dynamic media content encoded by the media server is from a real-time source.

13. A system for reporting a dynamic media content playback position comprising:

a media player configured for playback of available dynamic media content, the media player receiving a portion of dynamic media content encoded and streamed by a media server and a content duration of the portion of dynamic media content received at the media player, wherein;

the portion is encoded by the media server from a format unsupported by the media player into a format supported by the media player and streamed to the media player before all of the dynamic media content has been encoded by the media server,

content duration of the available dynamic media content is initially reported as the content duration of the portion of dynamic media content received at the media player,

the media player receives increasing available dynamic media content during the playback as the dynamic media content is encoded and streamed by the media server, and

the increasing available dynamic media content is received at the media player during the playback at a rate at which the dynamic media content is encoded and made available for streaming to the media player;

a processor for checking a current playback position of the available dynamic media content and determining whether to initiate end of service procedures by comparing the current playback position of the available dynamic media content with the content duration of the available dynamic media content, wherein the processor;

determines a predicted content duration based on the rate at which the increasing available dynamic media content is received at the media player during the playback,

increases the content duration of the available dynamic media content during the playback to the predicted content duration of the available dynamic media content,

updates the content duration of the available dynamic media content from the predicted content based on the increasing available dynamic media content received at media player during the playback, and

initiates the end of stream procedures only if the content duration of the available dynamic media content has not increased so that the playback of the available dynamic media content by the media player is uninterrupted; and

a display device for displaying the current playback position based on the content duration of the available dynamic media content during the playback of the available dynamic media content.

14. The system of claim 13 wherein the processor enacts mitigation measures if the increasing available dynamic media content is being received at a rate slower than the playback position is advancing.

15. The system of claim 14 wherein the mitigation measures comprise reducing a rendering rate of the available dynamic media content.

16. The system of claim 14 wherein the mitigation measures comprise buffering more of the available dynamic media content prior to starting or restarting playback.

17. The system of claim 13 wherein the available dynamic media content received at the display device is stored within a dynamic media file.

18. The system of claim 13 wherein the display device reports the current playback position by a progress bar and by a counter.

19. The system of claim 13 wherein the display device reports the current playback position only by a counter after the processor has detected the available dynamic media content.

20. The system of claim 13 wherein the dynamic media content is streamed by the media server over a communication medium using file-centric media streaming protocols.