Apparatus and method for processing signals selected from multiple data streams

• US 6,208,636 B1
• Filed: 05/28/1998
• Issued: 03/27/2001
• Est. Priority Date: 05/28/1998
• Status: Expired due to Term

• Current Assignee: Northpoint Technology Limited
• Original Assignee: Northpoint Technology Limited
• Inventors: Tawil, Saleem, Tawil, Carmen
• Primary Examiner(s): VU, HUY DUY
• Application Number:
  US09/085,925
• Time in Patent Office: 1,034 Days
• Field of Search: 455/277.1, 455/277.2, 455/272, 455/3.2, 455/4.2, 375/347, 375/349, 348/554, 348/705, 348/734, 340/825.33, 340/825.35, 340/825.69, 340/825.72, 340/825.03, 370/310, 370/315, 370/334, 370/343, 370/480, 370/481, 370/482, 370/485, 370/486, 370/351, 370/360
• US Class Current: 370/351
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

A multiple data stream processing arrangement includes a receiver/signal processor (14) and a plurality of signal input paths (11, 12) which meet at a junction (36). A junction output from the junction (36) provides a single input to the receiver/signal processor (14). A switching arrangement (16) is associated with the plurality of signal input paths (11, 12). The switching arrangement (16) includes a switch (31, 32) connected in each signal input path (11, 12). Each switch (31, 32) responds to an enable signal to allow a data stream applied to the respective input path (11, 12) to pass on to the junction (36) and to the receiver/signal processor (14). According to the invention only one signal input path (11, 12) and respective switch (31,32) is enabled at any given time.

Claims

1. An apparatus for receiving multiple data streams, the apparatus comprising:

(a) a first switch connected to a first input and having a first switch output, the first switch adapted to be selectively enabled for passing a first stream of data signals from the first input to the first switch output, the first stream of data signals including first channel data;

(b) a second switch connected to a second input and having a second switch output, the second switch adapted to be selectively enabled for passing a second stream of data signals from the second input to the second switch output, the second stream of data signals including second channel data different from the first channel data;

(c) a data stream junction connected to the first switch output and the second switch output and having a junction output;

(d) a controller for receiving a channel select input related to a desired channel output to be formed from one of the first channel data or second channel data, and, in response to the channel select input, for enabling the one of the first switch or the second switch which receives the stream of data including the channel data from which the desired channel output is to be formed; and

(e) a memory device operatively connected to the controller, the memory device storing first signal input information indicating the respective switch through which the first channel data is received and further storing second signal input information indicating the respective switch through which the second channel data is received.

2. The apparatus of claim 1 further comprising:

(a) a signal processor connected to receive data signals from the data stream junction; and

(b) wherein the controller controls the operation of the signal processor to produce the desired channel output from data signals received from the data stream junction.

3. The apparatus of claim 2 wherein the memory device also stores:

(a) first signal processing information to control the processing of the first channel data; and

(b) second signal processing information to control the processing of the second channel data.

4. The apparatus of claim 3 wherein the memory device stores additional channel output information including (i) additional processing information to control the processing of additional channel data and (ii) additional signal input information indicating the switch through which the respective additional channel data is received.

5. The apparatus of claim 2 wherein the signal processor includes:

(a) a tuner;

(b) a demodulator;

(c) a forward error correction decoder; and

(d) a demultiplexer/format decoder.

6. The apparatus of claim 1 wherein the data stream junction comprises:

(a) an impedance matching amplifier.

7. The apparatus of claim 1 wherein:

(a) the first input receives signals on a plurality of first carrier frequencies; and

(b) the second input receives signals on at least one of the first carrier frequencies.

8. An apparatus for receiving multiple data streams, the apparatus comprising:

(a) a plurality of input paths, each respective input path for carrying a different data stream;

(b) a switching structure associated with the plurality of input paths for selectively blocking the respective data stream on each different input path;

(c) a controller for receiving a channel select input related to a desired channel output to be formed from data included in one of the different data streams, and for responding to the channel select input by blocking at least one of the plurality of data streams which does not include the channel data from which the desired channel output is to be formed; and

(d) a memory device operatively connected to the controller, the memory device storing channel output information for each different channel output which may be produced from the plurality of data streams, the channel output information for each respective channel output including signal input information indicating the input path on which the respective channel data is carried.

9. The apparatus of claim 8 further comprising:

(a) a signal processor; and

(b) wherein the controller controls the operation of the signal processor to produce the desired channel output from the data included in one of the different data streams.

10. The apparatus of claim 9 wherein the channel output information for each respective channel output further includes signal processing information to control the signal processor in processing the respective channel data.

11. The apparatus of claim 10 wherein the channel output information for each respective channel output is related to a unique channel identifier in the memory device.

12. The apparatus of claim 9 wherein the signal processor includes:

(a) a tuner;

(b) a demodulator;

(c) a forward error correction decoder; and

(d) a demultiplexer/format decoder.

13. The apparatus of claim 8 wherein:

(a) each data stream comprises signals from a different antenna.

14. The apparatus of claim 8 wherein:

(a) at least two of the data streams include signals on a common carrier frequency.

15. A method for receiving multiple data streams, the method comprising the steps of:

(a) directing a plurality of different data streams each along a different input path to a signal processor, each the data stream including channel data for producing a respective channel output;

(b) receiving a channel select input relates to a desired channel output comprising a particular one of the channel outputs;

(c) responding to the channel select input by blocking at least one of the data streams which does not include channel data from which the desired channel output is to be produced; and

(d) storing channel output information for each different channel output which may be produced from the plurality of data streams, the channel output information for each respective channel output including signal processing information to control the signal processor in processing the respective channel data, and signal input information indicating the input path on which the respective channel data is carried.

16. The method of claim 15 further comprising the steps of:

(a) in response to the channel select input, accessing the stored channel output information for the desired channel output; and

(b) controlling the operation of the signal processor with the signal processing information for the desired channel output.

17. The method of claim 16 further comprising the step of:

(a) utilizing a channel identifier uniquely associated with the desired channel output in accessing the channel output information for the desired channel output.

18. The method of claim 15 wherein:

(a) each data stream utilizes at least one common carrier frequency.

19. The method of claim 16 wherein the step of controlling the operation of the signal processor includes the steps of:

(a) tuning the signal processor to the carrier frequency of the channel data for producing the desired channel output;

(b) demodulating the signals at that carrier frequency; and

(c) decoding the demodulated signals to identify and select the channel data.