Virtualization in adaptive stream creation and delivery

• US 9,807,137 B2
• Filed: 05/06/2014
• Issued: 10/31/2017
• Est. Priority Date: 12/19/2011
• Status: Active Grant

• Current Assignee: Ericsson AB (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson AB (Telefonaktiebolaget LM Ericsson)
• Inventors: Forsman, Robert Hammond, Phillips, Chris, Reynolds, Jennifer Ann, Dasher, Charles Hammett, Martin, Steve
• Primary Examiner(s): VU, VIET DUY
• Application Number:
  US14/271,201
• Publication Number:
  US 20140244732A1
• Time in Patent Office: 1,274 Days
• Field of Search: 709203, 709217, 709219, 709230, 709231, 709250
• CPC Class Codes: H04L 65/60 Network streaming of media packets
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6581 Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application
• CPC Class Codes: H04N 21/8456 by decomposing the content in the time domain, e.g. in time segments

Abstract

An adaptive streaming server, a method, and a system are described herein that create a content stream to be delivered to one or more clients by segmenting the content into data structures which are stored in random access memory (volatile storage) rather than segmenting the content into segment files which are stored on a disk or database (non-volatile storage).

Claims

1. A streaming server comprising:

a processing unit;

a random access memory unit coupled to the processing unit; and

wherein the streaming server is configured to receive a request to play a content stream, receive the content stream, segment the content stream into a plurality of data structures rather than into a plurality of segment files, and store the plurality of data structures in the random access memory unit.

2. The streaming server of claim 1, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream.

3. The streaming server of claim 1, where the streaming server is configured to segment the content stream into the plurality of data structures only when it becomes necessary to output one or more fragments of the content stream.

4. The streaming server of claim 1, wherein the content stream is one of a single program transport stream, a multi-program transport stream, a video-on-demand content stream, or a live content stream.

5. A method in a streaming server, the method comprising:

receiving a request to play a content stream;

receiving the content stream;

segmenting the content stream into a plurality of data structures rather than into a plurality of segment files; and

storing the plurality of data structures in a random access memory unit.

6. The method of claim 5, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream.

7. The method of claim 5, where the content stream is segmented into the plurality of data structures only when it becomes necessary to output one or more fragments of the content stream.

8. The method of claim 5, wherein the content stream is one of a single program transport stream, a multi-program transport stream, a video-on-demand content stream, or a live content stream.

9. A streaming server for providing a content stream through a network to a client, the streaming server comprising:

a Hypertext Transfer Protocol (HTTP) server comprising an input interface at which there is received a request from the client to play the content stream;

a segmenting unit configured to receive the content stream and segment the content stream into a plurality of data structures rather than into a plurality of segment files, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream;

a random access memory unit configured to store the plurality of data structures;

the HTTP server further comprising;

a processing unit configured to generate a manifest that includes a plurality references corresponding to a plurality of fragments of the content stream;

an output interface from which the manifest is sent to the client;

the input interface at which there is received a request from the client to fetch one of the fragments corresponding to the content stream;

the processing unit configured to obtain bytes associated with the requested fragment from the data structures stored in the random access memory unit, wherein the processing unit is configured to use time codes associated with the requested fragment to lookup bytes from one or more of the data structures associated with the requested fragment; and

the output interface from which there is sent the bytes associated with the requested fragment to the client.

12. The streaming server of claim 9, where the segmenting unit is configured to segment the content stream into the plurality of data structures only when it becomes necessary to provide one or more of the fragments of the content stream to the client.

13. The streaming server of claim 9, wherein:

the client is an adaptive streaming capable client; and

the content stream is one of a single program transport stream, a multi-program transport stream, a video-on-demand content stream or a live content stream.

10. A streaming server for providing a content stream through a network to a client, the streaming server comprising:

a Hypertext Transfer Protocol (HTTP) server comprising an input interface at which there is received a request from the client to play the content stream;

a segmenting unit configured to receive the content stream and segment the content stream into a plurality of data structures, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream;

a random access memory unit configured to store the plurality of data structures;

the HTTP server further comprising;

a processing unit configured to generate a manifest that includes a plurality references corresponding to a plurality of fragments of the content stream;

an output interface from which the manifest is sent to the client;

the input interface at which there is received a request from the client to fetch one of the fragments corresponding to the content stream;

the processing unit configured to obtain bytes associated with the requested fragment from the data structures stored in the random access memory unit, wherein the processing unit is configured to use time codes associated with the requested fragment to lookup bytes from one or more of the data structures associated with the requested fragment, wherein the processing unit is configured to perform an interpolation operation when looking-up the bytes from the one or more data structures associated with the requested fragment; and

the output interface from which there is sent the bytes associated with the requested fragment to the client.

11. A streaming server for providing a content stream through a network to a client, the streaming server comprising:

a Hypertext Transfer Protocol (HTTP) server comprising an input interface at which there is received a request from the client to play the content stream;

a segmenting unit configured to receive the content stream and segment the content stream into a plurality of data structures, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream;

a random access memory unit configured to store the plurality of data structures;

the HTTP server further comprising;

a processing unit configured to generate a manifest that includes a plurality references corresponding to a plurality of fragments of the content stream;

an output interface from which the manifest is sent to the client, wherein the HTTP server is configured to send the manifest to the client before the segmenting unit completes segmenting the content stream into the plurality of data structures;

the input interface at which there is received a request from the client to fetch one of the fragments corresponding to the content stream;

the processing unit configured to obtain bytes associated with the requested fragment from the data structures stored in the random access memory unit, wherein the processing unit uses time codes associated with the requested fragment to lookup bytes from one or more of the data structures associated with the requested fragment; and

the output interface from which there is sent the bytes associated with the requested fragment to the client.

14. A method in a streaming server for providing a content stream through a network to a client, the method comprising:

receiving a request from the client to play the content stream;

receiving the content stream;

segmenting the content stream into a plurality of data structures rather than into a plurality of segment files, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream;

storing the plurality of data structures in a random access memory unit;

generating a manifest that includes a plurality references corresponding to a plurality of fragments of the content stream;

sending the manifest to the client;

receiving a request from the client to fetch one of the fragments corresponding to the content stream;

obtaining bytes associated with the requested fragment from the data structures stored in the random access memory unit by using time codes associated with the requested fragment to lookup bytes from one or more of the data structures associated with the requested fragment; and

sending the bytes associated with the requested fragment to the client.

17. The method of claim 14, wherein the segment operation is performed only when it becomes necessary to provide one or more of the fragments of the content stream to the client.

18. The method of claim 14, wherein:

the client is an adaptive streaming capable client; and

the content stream is one of a single program transport stream, a multi-program transport stream, a video-on-demand content stream or a live content stream.

15. A method in a streaming server for providing a content stream through a network to a client, the method comprising:

receiving a request from the client to play the content stream;

receiving the content stream;

segmenting the content stream into a plurality of data structures, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream;

storing the plurality of data structures in a random access memory unit;

generating a manifest that includes a plurality references corresponding to a plurality of fragments of the content stream;

sending the manifest to the client;

receiving a request from the client to fetch one of the fragments corresponding to the content stream;

obtaining bytes associated with the requested fragment from the data structures stored in the random access memory unit by using time codes associated with the requested fragment to lookup bytes from one or more of the data structures associated with the requested fragment, wherein the obtaining step further comprises an interpolation step when looking-up the bytes from the one or more data structures associated with the requested fragment; and

sending the bytes associated with the requested fragment to the client.

16. A method in a streaming server for providing a content stream through a network to a client, the method comprising:

receiving a request from the client to play the content stream;

receiving the content stream;

segmenting the content stream into a plurality of data structures, wherein the plurality of data structures encompass (1) a reference to the content stream and (2) pointers which correspond to time codes to the content stream;

storing the plurality of data structures in a random access memory unit;

generating a manifest that includes a plurality references corresponding to a plurality of fragments of the content stream;

sending the manifest to the client, wherein the manifest is sent to the client before completing the segmenting the content stream into the plurality of data structures;

receiving a request from the client to fetch one of the fragments corresponding to the content stream;

obtaining bytes associated with the requested fragment from the data structures stored in the random access memory unit by using time codes associated with the requested fragment to lookup bytes from one or more of the data structures associated with the requested fragment; and

sending the bytes associated with the requested fragment to the client.