How We Do It We put people at the forefront of everything we do. Through our proprietary HX approach, we design Human Experiences that close the gap between what people want and what brands need. Read more. Explore our latest news. The media director records the location of all programs in the system and which media engine holds a particular program or portions of it. Upon communication from a subscriber media console, the media director directs the media console to the appropriate media engine to begin the data stream.
Media engines are connected together through a set of Gigabit Ethernet switch , and to the network communicating with the subscribers. Each media program a movie, a documentary, a TV program, a music clip, etc. Such partitioning provides a small granularity for media data units and makes data movement, replications, staging and management much easier and more efficient. The scalability of the system employing the present invention is demonstrated in FIG.
Each city employs a series of media stations interconnected through the metropolitan area network MAN Each media station serves a number of subscribers having media consoles Each subscriber has a primary media station to serve its streaming requests.
Additionally, each city incorporates on-line support layer elements including a media location registry MLR , a home media station and a content manager in a data center DC In alternative embodiments, multiple cities incorporate a MAM for introduction of content into the system. The MAM determines when and where to distribute a program.
For streaming content to subscribers, the media director in each of the media stations employs a load balancing scheme to keep track of the task load of the media engines in the media station.
Load balance is achieved by directing streaming requests according to current system states and load distribution. An example of the communications sequence for data transfer under the command of the media director is shown in FIG. The media console requests a segment from the media director The media director identifies the location of the segment in a segment location table as present in media engines 1 and 8 , ME 1 and ME 8 and redirects the MC to ME 1 's IP address The MC then requests segment from ME 1 which begins streaming data When the segment being streamed nears its end, ME 1 requests the location of the next segment from the MD which locates the next segment and MEs storing that segment in the segment location table, selects an ME based on load and status and replies with the identification of the next segment seg and the IP address ME 1 notifies ME 2 to preload the next segment seg and upon completion of the streaming of seg directs ME 2 to start streaming seg to IP address ME 2 then begins streaming the data from seg to the MC.
A flow diagram of the sequence described with respect to FIG. The process described continues until the MC orders a cessation of streaming by the ME at which time the ME notifies the MD the streaming has stopped The media director may employ a number of MEs to supply the segments in sequence to the media console. As a portion of the load balancing scheme, a rapid replication scheme is used to copy a segment from one media engine to another.
When a media engine exceeds its capacity of streaming, a highly demanded segment can be replicated to another media engine and further requests for that segment are directed to the new media engine.
The extra delay observed by the streaming request that triggered the replication is less than 30 milliseconds in exemplary embodiments. The communications sequence is shown in FIG. The MD replies with a redirection to a media engine ME 1 storing the segment. If ME 1 has reached a predetermined maximum threshold some percentage of the maximum capacity , when another media console MEn requests streaming of the same segment, if the segment is not present on another available ME in the segment location table, the MD directs another media engine ME 2 to fetch the segment and specifies the ME from which the segment is to be replicated.
In various embodiments the maximum threshold may be determined such that the replication can occur from the first media engine or other existing media engines in the segment location table. Alternatively, the fetch command may direct copying of the segment from a media engine in another media station as described with respect to FIG. For purposes of the example, the source media engine defined by the MD is designated MEx.
ME 2 requests a copy of the segment from MEx which replies by sending the segment A stream swapping method is used to exchange two streams of the same segment, one on a first media engine ME 2 that has a complete copy of the segment and a second on a second media engine ME 1 which is currently receiving the same segment.
Where the subscriber attempts a fast-forward while streaming from ME 1 with the incomplete segment, the media director swaps the fast-forwarding stream from ME 1 to ME 2 with the complete segment. The stream using the same segment running at normal rate is swapped from the first media engine to the second media engine thereby avoiding a failure of the fast forwarding operation. During normal operation, the media director MD has directed ME 1 to fetch a particular segment.
ME 1 requests a copy of the segment from the source ME arbitrarily identified as MEx and MEx responds by sending the desired segment. If MC 1 requests a fast forward of the stream segment ME 1 identifies the potential for a streaming error if the fast forward exceeds the portion of the segment which has been received from MEx.
ME 1 notifies the MD of the impending error state and the MD replies with the identification of a media engine ME 2 which can be MEx itself having the entire segment that is idle or has started streaming after ME 1.
ME 1 requests a swap identifying MC 1 as the media console in current communication and providing the segment number and frame within the segment. ME 2 begins streaming of data from the segment to MC and, if ME 2 has been streaming, returns a swap identifying media console MCn and the frame of the segment.
The media engines in the media station are symmetrical with respect to input and output thereby allowing data to be taken into the media engine substantially as rapidly as streaming data is sent out. Figure 12 Power Connection To safely disconnect the Media Console, unplug the power adapter from the power outlet first. Check that the power adapter connections are secure and correct.
Turn on the Media Console and TV set. Use the remote control to enter the User Name and Password supplied by your service provider.
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