Methods and apparatus for format selection for network optimization

• US 7,770,200 B2
• Filed: 07/24/2007
• Issued: 08/03/2010
• Est. Priority Date: 07/24/2007
• Status: Active Grant

• Current Assignee: Time Warner Cable Enterprises LLC (Charter Communications Incorporated)
• Original Assignee: Time Warner Cable Inc. (Charter Communications Incorporated)
• Inventors: Rieger, Remi, Brooks, Paul D.
• Primary Examiner(s): Saltarelli; Dominic D
• Application Number:
  US11/881,034
• Publication Number:
  US 20090028182A1
• Time in Patent Office: 1,106 Days
• Field of Search: 725/87, 725/91, 725/93, 725/95, 725/96, 725/97, 725/105, 725/116, 725/120
• US Class Current: 725/95
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 65/61 for supporting one-way streaming services, e.g. Internet radio
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/756 adapting media to device capabilities
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/26216 involving the channel capacity, e.g. network bandwidth admission control, resource allocation in open networks H04L12/5692; flow control in packet networks H04L47/10; establishing a schedule or organising the servicing of application requests taking into account QoS H04L67/61
• CPC Class Codes: H04N 21/47202 for requesting content on demand, e.g. video on demand

Abstract

Method and apparatus for optimizing network bandwidth utilization by delivering to users only the minimum number of programs required by service provider policies. In one embodiment, the method comprises switching some users from lower quality versions of programs to higher quality versions of the same programs, and removing those lower quality versions of programs from a given service group. In another embodiment, some users are switched from higher quality versions of programs to lower quality versions of those same programs, and the higher quality versions of programs removed from a given service group.

Claims

1. A method of operating a content delivery network to deliver programming rendered in both standard definition (SD) and high definition (HD) formats to various respective ones of a plurality of user devices associated with said network, said method comprising:

determining at least one of said user devices as having an up-conversion capability; and

causing, via a signal sent from a network entity of said content delivery network, said at least one of said user devices to tune to a program rendered in said SD format, thereby providing said at least one of said user devices with programming at least approximating quality provided by said HD format even though said at least one user device is switched to receive said programming in said SD format;

wherein said network entity comprises a headend entity or an intermediate node entity of said network.

2. The method of claim 1, further comprising removing at least one instance of said program rendered in said HD format from delivery over said network so as to reduce instances of duplicate HD format programming delivery.

3. The method of claim 1, wherein said at least one of said user devices comprises a plurality of user devices associated with a common portion or node of said network, and said act of causing comprises causing said plurality of user devices associated with said common portion or node to tune to said program rendered in said SD format, thereby allowing removal of at least one instance of said program rendered in said HD format from delivery to said common portion or node.

4. The method of claim 3, wherein said network comprises a broadcast switched architecture network, said common node portion or node comprises a broadcast switched hub, and said removal comprises selectively switching said at least one instance from delivery using a switch disposed at said hub.

5. The method of claim 1, wherein said network comprises a cable television network, and said plurality of user devices comprise a plurality of set-top boxes.

6. The method of claim 1, further comprising removing at least one instance of said HD format program, thereby conserving network bandwidth.

7. The method of claim 1, wherein said signal is sent from a headend entity of said content delivery network directly to said at least one of said user devices.

8. A method of operating a content distribution network, comprising:

receiving at a network server a request for programming rendered at a first level of quality from a user device;

determining that said requesting user device has a quality up-conversion capability;

causing via said network server said requesting user device to access the programming rendered at a second level of quality, the second level of quality being lesser than the first level; and

delivering said programming rendered at said second level to enable said up-conversion capability of said requesting user device, said up-conversion providing said requesting user device with the programming at least approximating the level of quality provided by said first level while receiving only said programming rendered at said second level of quality.

9. The method of claim 8, wherein the up-conversion capability comprises increasing the number of pixels in one or more video images of said programming by re-sampling.

10. The method of claim 8, wherein the up-conversion capability comprises sharpening the edges of objects within one or more video images of said programming.

11. The method of claim 8, wherein the first level comprises approximately 15 Mbps, and said second level comprises approximately 3.75 Mbps.

12. The method of claim 8, wherein said act of determining is accomplished using data obtained from a client computer program operative to run on said requesting user device.

13. The method of claim 8, wherein said act of determining comprises associating identifying information for said requesting user device with data stored at a substantially central storage location of said network.

14. The method of claim 13, wherein said identifying information comprises information that allows an owner of, or a subscriber associated with, said requesting user device to remain anonymous.

15. The method of claim 8, wherein said entity of said content distribution network causes said requesting user device to access said programming by sending a signal to a hub entity of said content distribution network, said hub entity configured to cause said requesting user device to receive said programming substantially in response to said signal.

16. The method of claim 8, wherein said entity of said content distribution network causes said requesting user device to access said programming by sending a signal to said user device.

17. The method of claim 8, further comprising removing at least one instance of said programming rendered at said first level of quality from delivery over said network based at least in part on said access of the programming rendered at a second level of quality, said removing conserving network bandwidth.

18. A method of operating a content delivery network, comprising:

delivering at least first and second versions of a program to a plurality of user devices, said first and second versions comprising standard definition (SD) and high definition (HD) versions of said program, respectively;

identifying at least one bandwidth surplus or deficiency on said network;

determining that at least some of said plurality of user devices are capable of up-converting from SD to HD resolution; and

causing, via at least one process running on a headend or hubsite entity of said content delivery network, selectively switching of at least a portion of said user devices comprising said up-conversion capability from said SD version to said HD version of said program, or from HD version to said SD version, based at least in part on said surplus or deficiency.

19. The method of claim 18, wherein said identifying at least one bandwidth surplus or deficiency on said network comprises determining a bandwidth deficiency, and said selectively switching comprises switching enough of said plurality of user devices comprising said up-conversion capability to substantially mitigate said deficiency.

20. The method of claim 18, wherein said identifying comprises:

determining a projected available bandwidth for some time in the future;

determining a projected demand for said program; and

determining said surplus or deficiency based at least in part on said projected available bandwidth and said projected demand.

21. The method of claim 20, wherein at least one of said projected available bandwidth and said projected demand is based on historical data for said network.

22. The method of claim 18, wherein said up-conversion comprises:

increasing a number of pixels in a video image by re-sampling; and

sharpening edges of objects within said video image.

23. A server apparatus operating within a content delivery network and in data communication with a plurality of consumer-premises equipment (CPE), said server apparatus configured to deliver a program in high definition (HD) format and standard definition (SD) format to said plurality of CPE, said apparatus comprising:

a storage entity configured to store said HD format and SD format program;

at least one interface configured to provide said HD format and SD format program to said plurality of CPE via said network; and

a processor configured to run at least one computer program thereon, said computer program configured to;

access information identifying at least a portion of said plurality of CPE as being capable of up-converting SD format to a format which approximates said HD format; and

controllably switch said at least portion of said plurality of CPE to receive the SD format program so as to provide said at least portion of CPE with said approximated HD format program via a lower rate bitstream.

24. The server apparatus of claim 23, wherein said switch is based at least in part on available bandwidth within said network.

25. The server apparatus of claim 23, wherein said at least one computer program is further configured to remove at least one HD format program from being delivered over said network substantially in response to said controllable switch.

26. The server apparatus of claim 23, wherein said at least one computer program is further configured to:

determine that said at least portion of said plurality of CPE are all associated with a common network node or entity; and

remove at least one HD format program from being delivered over said common network node or entity substantially in response to said controllable switch.

27. The server apparatus of claim 26, wherein said network comprises a broadcast switched architecture (BSA) network, and said removing comprises switching off said HD format program for at least a portion of a service group associated with a switching node.

28. A method of operating a content distribution network, comprising:

receiving at a network server a request for programming from a user device;

determining that said requesting user device has a quality up-conversion capability;

where said determining indicates that said requesting user device has said quality up-conversion capability, said network server causing said requesting user device to access the programming rendered at a first level of quality, the first level of quality being lesser than a second level of quality; and

delivering said programming rendered at said first level to enable said up-conversion capability of said requesting user device, said up-conversion providing said requesting user device with the programming at least approximating the level of quality provided by said second level while receiving only said programming rendered at said first level of quality.

29. The method of claim 28, wherein the up-conversion capability comprises increasing the number of pixels in one or more video images of said programming by re-sampling.

30. The method of claim 28, wherein the up-conversion capability comprises sharpening the edges of objects within one or more video images of said programming.

31. The method of claim 28, wherein the first level of quality comprises approximately 3.75 Mbps, and said second level of quality comprises approximately 15 Mbps.

32. The method of claim 28, wherein said act of determining is accomplished using data obtained from a client computer program operative to run on said requesting user device.

33. The method of claim 28, wherein said act of determining comprises associating identifying information for said requesting user device with data stored at a substantially central storage location of said network.

34. The method of claim 33, wherein said identifying information comprises information that allows an owner of, or a subscriber associated with, said requesting user device to remain anonymous.

35. The method of claim 28, wherein said entity of said content distribution network causes said requesting user device to access said programming by sending a signal to a hub entity of said content distribution network, said hub entity configured to cause said requesting user device to receive said programming substantially in response to said signal.

36. The method of claim 28, wherein said entity of said content distribution network causes said requesting user device to access said programming by sending a signal to said user device.

37. The method of claim 28, further comprising removing at least one instance of said programming rendered at said second level of quality from delivery over said network based at least in part on said access of the programming rendered at said first level of quality, said removing conserving network bandwidth.