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Method and apparatus for content distribution via non-homogeneous access networks
| Details |
Inventors: Son, Yong Ho; Goode, Christopher W. B.;
Assignee: Sedna Patent Services, LLC (Philadelphia, PA)
Primary Examiner: Kelley; Chris
Assistant Examiner: Ustaris; Joseph G.
Attorney, Agent or Firm: Patterson & Sheridan, LLP
A method and apparatus for streaming content to an access network in an interactive information distribution system. The method encapsulates the content in accordance to an Internet Protocol (IP). The content is then transcoded into a format supported by the access network, and streamed over a distribution network to a remote server or to a subscriber terminal that is coupled to the access network. The apparatus is embodied as stream caching server for streaming the content encapsulated within the IP packet to access networks via a stream distribution network in response to a request for content. A packet processor is coupled to the stream server for processing the encapsulated content within the IP packets into a format native to the access network. |
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DETAILED DESCRIPTION The invention provides a method and apparatus that is capable of streaming content to different types of access networks in an interactive information distribution system.
The method initially receives content encapsulated in accordance to an Internet Protocol (IP).
In one embodiment, the content is configured as a plurality of packets, e.
g.
, MPEG-2 or MPEG-4, contained in a payload of a Realtime Transport Protocol (RTP) packet within an IP packet.
The content is then transcoded into a format supported by a particular subscriber terminal, and streamed over a distribution network to a remote server or to a subscriber terminal that is coupled to the access network.
The apparatus is embodied as a stream caching server and, illustratively, a packet processor within the interactive distribution system.
By streaming program content in a manner that is common for servicing various types of access networks and subscriber terminals, the present invention provides scalable streaming of content to cable plants, digital subscriber line (xDSL) plants, terrestrial distribution networks, satellite distribution networks, private networks, the Internet, and the like.
The storage of the content in IP format minimizes the amount of data conversion otherwise required to stream content between different types of networks.
Additionally, the payload of the RTP packet is sized as a read block to minimize latencies in retrieving and streaming content.
That is, the storage media read block size conforms to the optimal buffer size units of the current equalization of the stream servers.
Furthermore, since the content is stored at the stream cache servers as IP packets, a communications (i.
e.
, protocol) stack is not required at either the input or output of the distribution network.
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Fault Detection 
