Signal selector and combiner for broadband content distribution

• US 7,542,715 B1
• Filed: 10/26/2006
• Issued: 06/02/2009
• Est. Priority Date: 11/07/2001
• Status: Expired due to Term

• Current Assignee: Entropic Communications, LLC (SoftBank Group Corp.)
• Original Assignee: Entropic Communications Incorporated (Maxlinear Incorporated)
• Inventors: Gurantz, Itzhak, Landry, Michael, El Wardani, Ladd
• Primary Examiner(s): SHARMA, SUJATHA R
• Application Number:
  US11/553,456
• Time in Patent Office: 950 Days
• Field of Search: 455 301- 305, 455/103, 455/137, 455/12.1, 455/20, 455/22, 455/179.1, 455/428, 455/427, 455/189.1, 455/188.1, 455/191.1, 455/190.1, 725 63- 68, 725/39, 725/114, 725/117, 725/139, 725/74, 725/78, 725 81- 83, 725/110, 725/149, 725/111, 725/118, 725126-128, 725/148
• US Class Current: 455/3.01
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving

Abstract

In a satellite receiving system, program channels are selected from one or more broadband signals and combined with other selected channels and transmitted from a first unit, for example an outdoor unit, to a second unit, for example a gateway, server, or set-top box, using a single cable. Channels can be selected by digitizing the broadband signal then digitally filtering to isolate the desired channels. The outputs of several LNBs can be selected and combined into one signal. Multiple set-top boxes can receive independent signals over a single cable from the outdoor unit.

Claims

1. A signal distribution system for distributing a plurality of video programs from a satellite outdoor unit (ODU) over a digital network comprising:

a signal selector that receives broadband LNB signals comprising a plurality of transponder channels, the signal selector is responsive to transponder information transmitted over the digital network, and selects at least one transponder channel from the broadband LNB signal based on the transponder select information;

at least one transport stream demultiplexer coupled to the signal selector to extract a specific video program from the transponder channel;

a data combiner coupled to the transport stream demultiplexers to combine video programs and produce a multiplexed signal;

wherein the multiplexed signal is formatted for transmission on the digital network and the digital network connects to the ODU.

2. The signal distribution system of claim 1 further comprising a plurality of set top boxes (STBs) connected to the digital network wherein all STBs extract channels from the multiplexed signal.

3. The signal distribution system of claim 2 wherein the digital network is a local area network (LAN).

4. The signal distribution system of claim 3 wherein the LAN is an Ethernet LAN.

5. The signal distribution system of claim 3 wherein the LAN uses data packets.

6. The signal distribution system of claim 1 wherein transponder select information is transmitted over the digital network by a gateway.

7. The signal distribution system of claim 1 wherein transponder select information is transmitted over a wireless link.

8. The signal distribution system of claim 1 further comprising a gateway connected to the digital network that receives the video programs in the multiplexed signal and distributes the video programs over a local area network (LAN) to STBs.

9. A signal distribution system for distributing a plurality of low noise amplifier and block converter (LNB) output signals from a satellite outdoor unit (ODU) comprising:

a gateway in communication with the ODU and at least one set top box (STB);

a signal selector that receives a plurality of broadband LNB signals comprising a plurality of transponder signals, the signal selector is responsive to transponder select information transmitted by the gateway and selects a plurality of transponder signals from at least one broadband LNB signal based on the transponder select information;

a frequency translator coupled to the signal selector that is capable of shifting the selected transponder signals to new carrier frequencies to produce RF signals; and

a signal combiner coupled to at least one frequency translator capable of combining at least two RF signals to produce a composite signal;

wherein the modulation of the composite signal is the same as the modulation of the broadband LNB signals and wherein the composite signal is transmitted to the gateway and the gateway receives the composite signal, decodes specific programs, and distributes the programs over a digital local area network (LAN) to STBs.

10. The signal distribution system of claim 9 wherein a translation table maps original channel locations on the selector input to new channel locations on the selector output.

11. The signal distribution system of claim 10 wherein the translation table is maintained by a controller located in the gateway and the translation table is communicated to devices in the network.

12. The signal distribution system of claim 10 wherein the translation table is maintained by a controller located in the ODU and the translation table is communicated to devices in the network.

13. A signal distribution system for distributing a plurality of transponder channels to new and legacy set top boxes (STBs) comprising:

a signal selector that receives broadband LNB signals comprising a plurality of transponder channels, the signal selector is responsive to transponder select information transmitted from at least one STB, and selects at least one transponder channel from the broadband LNB signal based on the transponder select information and outputs a composite signal comprising selected transponder channels; and

a multiport switch that receives a plurality of broadband LNB signals, selects a broadband LNB signal responsive to an LNB select signal from an STB, and outputs the selected LNB signal.

14. The signal distribution system of claim 13 wherein

the composite signal is output to a first cable;

the selected LNB signal is output to a second cable;

new STBs connect to the first cable to receive the composite signal; and

legacy STBs connect to the second cable to receive the selected LNB signal.

15. The signal distribution system of claim 13 wherein the composite signal and the selected LNB signals are output to a single cable and the composite signal is transmitted in regions of the spectrum unoccupied by the selected LNB signals.

16. The signal distribution system of claim 15 wherein new STBs receive and decode the composite signal and legacy STBs receive and decode the LNB signals.

17. The signal distribution system of claim 16 further comprising a controller that polls the STBs to determine the presence of new STBs, and if new STBs are present accept transponder select information from the new STBs and remap the selected transponder channels to regions of the spectrum unoccupied by selected LNB signals.

18. The signal distribution system of claim 17 further comprising a controller for maintaining a channel map specifying the assigned frequency slots for transponder channels and for communicating the channel map to the STBs.

19. The signal distribution system of claim 13 further comprising a controller that polls the STBs to determine the presence of new STBs, and if new STBs are present the controller accepts transponder select information from the new STBs and remaps the selected transponder channels to regions of the spectrum unoccupied by broadband LNB signals.