Patent US4583349A successfully refreshed from Google Patents.
Patent US5912907A successfully refreshed from Google Patents.
US5912907A
Expired / Lapsed
US
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Satellite receiver code rate switching apparatus
Assignee: Technicolor USA Inc
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Filing: 1993-11-22
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Granted: 1999-06-15
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Expires: 2013-11-22
Abstract
Abstract A satellite signal receiver includes an input demodulator followed by a Viterbi decoder and a Reed-Solomon decoder. A received signal is encoded with information including error-representative information, and exhibits an error correction code rate which is a function of the power level of a satellite transmitted signal. The demodulator produces control signals representing the presence or absence of synchronism with the received signal, and signal quality (e.g., signal-to-noise ratio). The Reed-Solomon decoder produces a control signal indicating whether or not error detection and correction is occurring properly. These control signals are sensed by a control network to change the code rate of the Viterbi decoder if necessary.
Inventors
- 👤 John Sidney Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:18
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0036; H04L1/0038; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/13; H03M13/15; H03M13/29; H03M13/37; H03M13/39; H03M13/41; H03M13/63; H03M13/6325; H03M13/65; H03M13/6508; H04L1/0009; H04L1/0023; H04L1/0026; H04L1/004; H04L1/0045; H04L1/0046; H04L1/0054
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
118 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising: a decoder network for decoding said input signal in association with an error correction decode rate; and a control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; wherein said decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal exclusive of error-related communications from said receiver to an associated encoder at a transmitter via a return satellite channel, and from said transmitter to said decoder network.
Claim 2
Dependent Claim
118 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising: a decoder network for decoding said input signal in association with an error correction decode rate; and a control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; wherein said decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal exclusive of error-related communications from said receiver to an associated encoder at a transmitter via a return satellite channel, and from said transmitter to said decoder network.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, wherein said decoder network self-adjusts to operate with a correct error correction decode rate when said control signal represents incorrect decoding by said decoding network.
Claim 4
Dependent Claim
115 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising: a decoder network for decoding said input signal in association with an error correction decode rate; and a control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; wherein said decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal; and said input signal is a satellite signal subject to being transmitted at different power levels with respectively associated different error correction code rates.
Claim 5
Dependent Claim
115 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising: a decoder network for decoding said input signal in association with an error correction decode rate; and a control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; wherein said decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal; and said input signal is a satellite signal subject to being transmitted at different power levels with respectively associated different error correction code rates.
Claim 6
Dependent Claim
21 words
Apparatus according to claim 1, wherein said control network responds to a Quality signal representing the quality of said input signal.
Claim 7
Dependent Claim
57 words
Apparatus according to claim 4, wherein said control network responds to both said Quality signal and to an Error signal representing the error correction status of said decoder, so that said decoder network self-adjusts to operate with a new error correction decode rate in response to the condition of both said Quality signal and said Error signal.
Claim 8
Dependent Claim
114 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising: a decoder network for decoding said input signal in association with an error correction decode rate; and a control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; wherein said decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal; said decoder network comprises a convolutional decoder and a Reed-Solomon decoder; and said control signal represents the decoding status of said Reed-Solomon decoder.
Claim 9
Dependent Claim
114 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, apparatus comprising: a decoder network for decoding said input signal in association with an error correction decode rate; and a control network coupled to said decoder network for providing a control signal representing desired or undesired decoding by said decoder network; wherein said decoder network self-adjusts to operate with a new error correction decode rate as a function of the condition of said control signal; said decoder network comprises a convolutional decoder and a Reed-Solomon decoder; and said control signal represents the decoding status of said Reed-Solomon decoder.
Claim 10
Dependent Claim
13 words
Apparatus according to claim 6, wherein said convolutional decoder is a Viterbi decoder.
Claim 11
Dependent Claim
26 words
Apparatus according to claim 1, wherein said control network responds to a Sync signal indicative of said apparatus being synchronized or unsynchronized with said input signal.
Claim 12
Dependent Claim
30 words
Apparatus according to claim 8 and further including means for demodulating said input signal; wherein said Sync signal is indicative of synchronization of said demodulating means with said input signal.
Claim 13
Dependent Claim
111 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, a signal processing method comprising the steps of: decoding said input signal in association with an error correction decode rate; generating a control signal representing desired or undesired decoding by said decoding step; and self-adjusting to operate with a new error correction decode rate in said decoding step in response to a predetermined condition of said control signal exclusive of error-related communications from said receiver to an associated encoder at a transmitter via a return satellite channel, and from said transmitter to said decoder network.
Claim 14
Dependent Claim
111 words
In a receiver for processing an input signal received from a satellite transmission channel, said input signal containing encoded intelligence and error correction code rate information, a signal processing method comprising the steps of: decoding said input signal in association with an error correction decode rate; generating a control signal representing desired or undesired decoding by said decoding step; and self-adjusting to operate with a new error correction decode rate in said decoding step in response to a predetermined condition of said control signal exclusive of error-related communications from said receiver to an associated encoder at a transmitter via a return satellite channel, and from said transmitter to said decoder network.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-06-14 | 2002-12-14 | 2003-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-14 | 2006-12-14 | 2007-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-14 | 2010-12-14 | 2011-06-15 | $7700.00 | Window Closed / Lapsed |