Minimizing channel change time for IP video
First Claim
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1. A method for minimizing the channel change time for IP digital video comprising the steps of:
- receiving a first channel stream of IP digital video from a network;
monitoring channel change requests to change the IP digital video;
matching the channel change requests to at least one channel change pattern;
in response to matching a channel change request to a channel change pattern, requesting a second channel stream of IP digital video from the network corresponding to the channel change pattern;
receiving the second channel stream of IP digital video in a storage device; and
transmitting the second channel stream of IP digital video from the storage device to a display device.
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Abstract
Subscribers to Internet Protocol TV services usually complain about one key characteristic—the additional delay digital video introduces when subscribers change channels, especially when subscribers “channel surf.” The problem is traced to at least three sources of delay in a convention Internet Protocol video deployment system. The channel changing delay can be minimized by caching video packets for the most likely next channel in a buffer in anticipation of a television subscriber changing channels and/or by having an adaptable buffer length in the set top box.
337 Citations
19 Claims
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1. A method for minimizing the channel change time for IP digital video comprising the steps of:
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receiving a first channel stream of IP digital video from a network;
monitoring channel change requests to change the IP digital video;
matching the channel change requests to at least one channel change pattern;
in response to matching a channel change request to a channel change pattern, requesting a second channel stream of IP digital video from the network corresponding to the channel change pattern;
receiving the second channel stream of IP digital video in a storage device; and
transmitting the second channel stream of IP digital video from the storage device to a display device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for minimizing the channel change time for IP digital video comprising the steps of:
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receiving a channel stream of IP digital video from a network in a storage device;
monitoring the fill capacity of the storage device; and
in response to the fill capacity reaching a predetermined threshold for a duration of time, altering the size of the storage device. - View Dependent Claims (9, 10, 11)
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12. A system for minimizing the channel change time for IP digital video comprising:
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a first storage device for receiving a first channel stream of IP digital video from a network;
a customer premise equipment operable for monitoring channel change requests to change the IP digital video and matching the channel change requests to at least one channel change pattern; and
in response to matching the channel change request to a channel change pattern, requesting a second channel stream of IP digital video from the network corresponding to the channel change pattern; and
a second storage device for receiving the second channel stream of IP digital video and transmitting the second channel stream of IP digital video from the storage device to a display device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification