US5511082A
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Punctured convolutional encoder
Assignee: Vizio Inc
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Filing: 1994-05-10
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Granted: 1996-04-23
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Expires: 2014-05-10
Abstract
Abstract A method and apparatus are provided for convolutionally encoding digital data with a rate 4/5 convolutional code. A nonoptimal rate 1/2, sixteen-state convolutional code is punctured to rate 4/5 using a puncture map of ##EQU1## and octal generators 25, 37 wherein ν=4. An incoming data stream is processed using the rate 4/5 code. Punctured rate 3/4 and 6/7 codes are also provided.
Inventors
- 👤 Stephen K. How
- 👤 Chris Heegard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:20
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0067; H04L1/0068; H04L1/0069; H03; H03M; H03M13/00; H03M13/03; H03M13/23; H04L1/0059
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A method for convolutionally encoding digital data with a rate 4/5 convolutional code, comprising the steps of: puncturing a rate 1/2, sixteen state convolutional code based on octal generators 25,37 to rate 4/5 using a puncture map of ##EQU14## wherein ν=4; and processing an incoming data stream using said rate 4/5 code.
Claim 2
Independent Claim
52 words
A method for convolutionally encoding digital data with a rate 4/5 convolutional code, comprising the steps of: puncturing a rate 1/2, sixteen state convolutional code based on octal generators 25,37 to rate 4/5 using a puncture map of ##EQU14## wherein ν=4; and processing an incoming data stream using said rate 4/5 code.
Claim 3
Dependent Claim
49 words
A rate 4/5 convolutional encoder comprising: a rate 1/2, sixteen state convolutional encoder based on octal generators 25,37 coupled to receive an input stream to be encoded; and means for puncturing the code from said rate 1/2 encoder to rate 4/5 using a puncture map of ##EQU15## wherein ν=4.
Claim 4
Dependent Claim
49 words
A rate 4/5 convolutional encoder comprising: a rate 1/2, sixteen state convolutional encoder based on octal generators 25,37 coupled to receive an input stream to be encoded; and means for puncturing the code from said rate 1/2 encoder to rate 4/5 using a puncture map of ##EQU15## wherein ν=4.
Claim 5
Independent Claim
52 words
A method for convolutionally encoding digital data with a rate 6/7 convolutional code, comprising the steps of: puncturing a rate 1/2, sixteen state convolutional code based on octal generators 25,37 to rate 6/7 using a puncture map of ##EQU16## wherein ν=4; and processing an incoming data stream using said rate 6/7 code.
Claim 6
Independent Claim
52 words
A method for convolutionally encoding digital data with a rate 6/7 convolutional code, comprising the steps of: puncturing a rate 1/2, sixteen state convolutional code based on octal generators 25,37 to rate 6/7 using a puncture map of ##EQU16## wherein ν=4; and processing an incoming data stream using said rate 6/7 code.
Claim 7
Dependent Claim
49 words
A rate 6/7 convolutional encoder comprising: a rate 1/2, sixteen state convolutional encoder based on octal generators 25,37 coupled to receive an input stream to be encoded; and means for puncturing the code from said rate 1/2 encoder to rate 6/7 using a puncture map of ##EQU17## wherein ν=4.
Claim 8
Dependent Claim
49 words
A rate 6/7 convolutional encoder comprising: a rate 1/2, sixteen state convolutional encoder based on octal generators 25,37 coupled to receive an input stream to be encoded; and means for puncturing the code from said rate 1/2 encoder to rate 6/7 using a puncture map of ##EQU17## wherein ν=4.
References Cited (Backward Citations)
US4462101A
Cited
US5029331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-04-23 | 1999-10-23 | 2000-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-23 | 2003-10-23 | 2004-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-23 | 2007-10-23 | 2008-04-23 | $7700.00 | Window Closed / Lapsed |