US5214656A
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Multiplexed coded modulation with unequal error protection
Assignee: Nokia Bell Labs
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Filing: 1990-12-13
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Granted: 1993-05-25
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Expires: 2010-12-13
Abstract
Abstract Unequal error protection is provided for an HDTV signal by separately coding each one of the classes of information in the HDTV signal by using a conventional coded modulation scheme and then time-division-multiplexing the various coded outputs for transmission. In particular, each class of information is separately coded by a 4-dimensional 8-state trellis code and a uniformly-spaced (QAM) signal constellation.
Inventors
- 👤 Hong Y. Chung
- 👤 Jin-Der Wang
- 👤 Lee-Fang Wei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0059; H04L1/006; H04N; H04N7/00; H04N7/12; H03; H03M; H03M13/00; H03M13/35; H04L1/0001; H04L1/0002; H04L1/0003; H04L1/0015; H04L1/0017; H04L1/0064; H04L1/0065; H04L1/0071; H04L27/00; H04L27/0008; H04L27/32; H04L27/34; H04L27/3405; H04L27/3416; H04L27/3422; H04L27/3427; H04N19/00; H04N19/85; H04N19/89; H04N21/00; H04N21/40; H04N21/41; H04N21/426; H04N7/015; H04N7/24; H04L2001/0098; H04N19/30
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
130 words
A method for processing an information signal, the information signal being comprised of a plurality of classes of information, the method comprising the steps of: separately coding each one of the plurality of classes of information using a separate coded modulation scheme to provide a coded output, such that one of the plurality of classes of information has more error protection than the remaining ones of the plurality of classes of information, where each one of the plurality of coded outputs comprises a plurality of signal points taken from a signal point constellation and where the signal point constellation of at least one of the coded modulation schemes is different from the signal point constellations of the remaining coded modulation schemes; and multiplexing the plurality of coded outputs for transmission.
Claim 2
Independent Claim
130 words
A method for processing an information signal, the information signal being comprised of a plurality of classes of information, the method comprising the steps of: separately coding each one of the plurality of classes of information using a separate coded modulation scheme to provide a coded output, such that one of the plurality of classes of information has more error protection than the remaining ones of the plurality of classes of information, where each one of the plurality of coded outputs comprises a plurality of signal points taken from a signal point constellation and where the signal point constellation of at least one of the coded modulation schemes is different from the signal point constellations of the remaining coded modulation schemes; and multiplexing the plurality of coded outputs for transmission.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the multiplexing step is time-division-multiplexing.
Claim 4
Dependent Claim
48 words
The method of claim 2 wherein the multiplexing step includes the step of assigning each one of the plurality of coded outputs to a time interval in a time frame, the time frame being greater than or equal to the sum of the plurality of assigned time intervals.
Claim 5
Dependent Claim
52 words
The method of claim 3 wherein at least one of the plurality of time intervals is longer in duration than the remaining ones of the plurality of the time intervals, and said longer time interval is assigned to the one of the plurality of classes of information that has more error protection.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the information signal is an HDTV signal.
Claim 7
Dependent Claim
54 words
The method of claim 1 wherein the separately coding step includes the step of: encoding each one of the plurality of classes of information to provide an encoded output; and mapping each one of the plurality of encoded outputs to a signal point of the respective signal point constellation to provide the coded output.
Claim 8
Dependent Claim
23 words
The method of claim 6 wherein each one of the plurality of classes of information is comprised of a plurality of data bits.
Claim 9
Dependent Claim
15 words
The method of claim 6 wherein the encoding step comprises the step of trellis coding.
Claim 10
Dependent Claim
18 words
The method of claim 6 wherein the encoding step comprises the step of encoding with a concatenated code.
Claim 11
Dependent Claim
19 words
The method of claim 9 wherein the concatenated code is comprised of a Reed-solomon code and a trellis code.
Claim 12
Independent Claim
223 words
A method for providing unequal error protection for an information signal, the information signal being comprised of a plurality of classes of information, the method comprising the steps of: assigning each one of the plurality of classes of information to a coded modulation scheme such that at least one of the plurality of classes of information is assigned to a different coded modulation scheme than the remaining ones of the plurality of classes of information; assigning a time interval to each one of the plurality of coded modulation schemes such that at least one of the plurality of coded modulation schemes is assigned to a different time interval than the remaining ones of the plurality of coded modulation schemes; and separately coding each one of the plurality of classes of information using the assigned coded modulation scheme in the assigned time interval to provide a coded output for transmission such that at least one of the plurality of classes of information has more error protection than the remaining ones of the plurality of classes of information; where each one of the coded outputs comprises a plurality of signal points taken from a signal point constellation and where the signal point constellation of at least one of the coded modulation schemes is different from the signal point constellations of the remaining coded modulation schemes.
Claim 13
Independent Claim
223 words
A method for providing unequal error protection for an information signal, the information signal being comprised of a plurality of classes of information, the method comprising the steps of: assigning each one of the plurality of classes of information to a coded modulation scheme such that at least one of the plurality of classes of information is assigned to a different coded modulation scheme than the remaining ones of the plurality of classes of information; assigning a time interval to each one of the plurality of coded modulation schemes such that at least one of the plurality of coded modulation schemes is assigned to a different time interval than the remaining ones of the plurality of coded modulation schemes; and separately coding each one of the plurality of classes of information using the assigned coded modulation scheme in the assigned time interval to provide a coded output for transmission such that at least one of the plurality of classes of information has more error protection than the remaining ones of the plurality of classes of information; where each one of the coded outputs comprises a plurality of signal points taken from a signal point constellation and where the signal point constellation of at least one of the coded modulation schemes is different from the signal point constellations of the remaining coded modulation schemes.
Claim 14
Dependent Claim
53 words
The method of claim 11 wherein at least one of the plurality of assigned time intervals is longer in duration than the remaining ones of the plurality of assigned time intervals, and said longer time interval is assigned to the one of the plurality of classes of information that has more error protection.
Claim 15
Dependent Claim
13 words
The method of claim 11 wherein the information signal is an HDTV signal.
Claim 16
Dependent Claim
41 words
The method of claim 11 wherein each one of the plurality of classes of information is comprised of m data bits occurring per T second signaling interval, where m>0 for each one of the plurality of classes of information, and T>0.
Claim 17
Dependent Claim
96 words
The method of claim 14 wherein the separately coding step includes the steps of: encoding the m data bits each for each T second signaling interval occurring in the assigned time interval to provide m+r data bits per T second signaling interval, where r>0 and is the average number of redundant data bits; and mapping each one of the m+r data bits occurring each signaling interval in the assigned time interval to a signal point from a signal constellation to provide the signal point each signaling interval in the assigned time interval as the coded output.
Claim 18
Dependent Claim
15 words
The method of claim 15 wherein the encoding step comprises the step of trellis coding.
Claim 19
Dependent Claim
18 words
The method of claim 15 wherein the encoding step comprises the step of encoding with a concatenated code.
Claim 20
Dependent Claim
19 words
The method of claim 15 wherein the concatenate code is comprised of a Reed-Solomon code and a trellis code.
Claim 21
Dependent Claim
167 words
Apparatus for processing an information signal, the information signal being comprised of a plurality of classes of information, the apparatus being comprised of: source encoding means responsive to the information signal for providing the plurality of classes of information; coding means responsive to the plurality of classes of information for separately coding each one of the plurality of classes of information using a separate coded modulation scheme to provide a coded output for each one of the plurality of classes of information such that at least one of the plurality of classes of information has more error protection then the remaining ones of the plurality of classes of information, where each one of the coded outputs comprises a plurality of signal points taken from a signal point constellation and where the signal point constellation of at least one of the coded modulation schemes is different from the signal point constellations of the remaining coded modulation schemes; and means for multiplexing the plurality of coded outputs for transmission.
Claim 22
Dependent Claim
167 words
Apparatus for processing an information signal, the information signal being comprised of a plurality of classes of information, the apparatus being comprised of: source encoding means responsive to the information signal for providing the plurality of classes of information; coding means responsive to the plurality of classes of information for separately coding each one of the plurality of classes of information using a separate coded modulation scheme to provide a coded output for each one of the plurality of classes of information such that at least one of the plurality of classes of information has more error protection then the remaining ones of the plurality of classes of information, where each one of the coded outputs comprises a plurality of signal points taken from a signal point constellation and where the signal point constellation of at least one of the coded modulation schemes is different from the signal point constellations of the remaining coded modulation schemes; and means for multiplexing the plurality of coded outputs for transmission.
Claim 23
Dependent Claim
15 words
The apparatus of claim 19 wherein the means for multiplexing operates in accordance with time-division-multiplexing.
Claim 24
Dependent Claim
45 words
The apparatus of claim 19 wherein the means for multiplexing assigns each one of the plurality of coded outputs to a time interval in a time frame, the time frame being greater than or equal to the sum of the plurality of assigned time intervals.
Claim 25
Dependent Claim
51 words
The apparatus of claim 19 wherein at least one of the plurality of time intervals is longer in duration than the remaining ones of the plurality of time intervals, and said longer time interval is assigned to the one of the plurality of classes of information that has more error protection.
Claim 26
Dependent Claim
13 words
The apparatus of claim 19 wherein the information signal is an HDTV signal.
Claim 27
Dependent Claim
52 words
The apparatus of claim 19 wherein the coding means is further comprised of: means for channel encoding each one the plurality of classes of information to provide an encoded output; and means for mapping each one of the encoded outputs to signal point of a signal constellation to provide the coded output.
Claim 28
Dependent Claim
34 words
The apparatus of claim 24 wherein at least one of the plurality of encoded outputs is mapped to a signal constellation of different size than the remaining ones of the plurality of encoded outputs.
Claim 29
Dependent Claim
23 words
The apparatus of claim 24 wherein each one of the plurality of classes of information is comprised of a plurality of data bits.
Claim 30
Dependent Claim
16 words
The apparatus of claim 24 wherein the means for channel encoding encodes using a trellis code.
Claim 31
Dependent Claim
16 words
The apparatus of claim 24 wherein the means for channel encoding encodes using a concatenated code.
Claim 32
Dependent Claim
19 words
The apparatus of claim 28 wherein the concatenated code is comprised of a Reed-Solomon code and a trellis code.
Claim 33
Dependent Claim
139 words
Apparatus for decoding a received signal, the received signal representing a stream of signal points, the apparatus being comprised of: means for demultiplexing the stream of signal points to provide a plurality of coded outputs, where each one of the plurality of coded outputs comprises a portion of the signal points from the stream of signal points and represents a class of information wherein one said coded outputs provides more error protection to its class of information than the remainder of said coded outputs to their classes of information; a plurality of means for decoding, where each one of the plurality of means for decoding decodes one of the plurality of coded outputs to provide one of the plurality of classes of information; and means for source decoding the plurality of classes of information to provide an information signal.
Claim 34
Dependent Claim
139 words
Apparatus for decoding a received signal, the received signal representing a stream of signal points, the apparatus being comprised of: means for demultiplexing the stream of signal points to provide a plurality of coded outputs, where each one of the plurality of coded outputs comprises a portion of the signal points from the stream of signal points and represents a class of information wherein one said coded outputs provides more error protection to its class of information than the remainder of said coded outputs to their classes of information; a plurality of means for decoding, where each one of the plurality of means for decoding decodes one of the plurality of coded outputs to provide one of the plurality of classes of information; and means for source decoding the plurality of classes of information to provide an information signal.
Claim 35
Dependent Claim
13 words
The apparatus of claim 30 wherein the information signal is an HDTV signal.
Claim 36
Dependent Claim
15 words
The apparatus of claim 30 wherein the means for demultiplexing operates in accordance with time-division-demultiplexing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |