US5838729A
Expired / Lapsed
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Multiple mode trellis decoder for a digital signal processing system
Assignee: Vantiva SA
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Filing: 1996-04-09
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Granted: 1998-11-17
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Expires: 2016-04-09
Abstract
Abstract An adaptive trellis decoder seamlessly switches between multiple operational modes. The decoder switches between multiple modes and accommodates data type transitions using a single state transition trellis with a predetermined number of states. The system decodes trellis encoded video data encoded in different formats respectively containing different numbers of levels associated with different modes. The decoder system adaptively operates in response to a configuration signal distinguishing between the modes, and employs a state transition trellis with the same number of trellis decoding states for decoding encoded data of different formats. The state transition decoding trellis may also be reset to a predetermined state in response to a synchronization signal generated as a result of a transition from one type of data to another or in response to a mode change.
Inventors
- 👤 Keren Hu
- 👤 William Wei-Lian Lin
- 👤 Maurice David Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:58
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/238; H04N21/2383; H03; H03M; H03M13/00; H03M13/35; H03M13/37; H03M13/39; H04N21/40; H04N21/43; H04N21/438; H04N21/4382
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
88 words
In a system, for processing a trellis encoded video input signal, apparatus comprising: a pre-processing network for subjecting said input signal to one of a plurality of pre-processing modes to provide a processed signal exhibiting one of a plurality of signal formats, said formats being associated with said modes; and a trellis decoder for decoding said processed signal, wherein said trellis decoder employs a state transition trellis with the same number of trellis states for decoding processed signals of a plurality of signal formats from said pre-processing network.
Claim 2
Dependent Claim
88 words
In a system, for processing a trellis encoded video input signal, apparatus comprising: a pre-processing network for subjecting said input signal to one of a plurality of pre-processing modes to provide a processed signal exhibiting one of a plurality of signal formats, said formats being associated with said modes; and a trellis decoder for decoding said processed signal, wherein said trellis decoder employs a state transition trellis with the same number of trellis states for decoding processed signals of a plurality of signal formats from said pre-processing network.
Claim 3
Dependent Claim
18 words
A system according to claim 1, wherein said plurality of signal formats exhibit respectively different numbers of levels.
Claim 4
Dependent Claim
20 words
A system according to claim 1, wherein said plurality of signal formats include normal response and partial response signal formats.
Claim 5
Dependent Claim
33 words
A system according to claim 1, wherein said system provides a configuration signal distinguishing between said modes; and said trellis decoder adaptively trellis decodes said processed signal in response to said configuration signal.
Claim 6
Dependent Claim
15 words
A system according to claim 1, wherein said state transition trellis has eight trellis states.
Claim 7
Dependent Claim
43 words
A system according to claim 1, including a control network for generating a synchronization signal in response to a data type transition in said input signal; and wherein said state transition trellis resets to a predetermined state in response to said synchronization signal.
Claim 8
Dependent Claim
26 words
A system according to claim 1, wherein said trellis decoder includes a branch metric computer for providing branch metric values in response to said processed signal.
Claim 9
Dependent Claim
22 words
A system according to claim 7, wherein said branch metric computer values include a substantially replicated value in one of said modes.
Claim 10
Dependent Claim
24 words
A system according to claim 7, wherein said branch metric computer values include different numbers of substantially replicated branch metric values in different modes.
Claim 11
Dependent Claim
27 words
A system according to claim 7, wherein said trellis decoder includes a Viterbi decoder for providing a Viterbi decoded output in response to said branch metric values.
Claim 12
Dependent Claim
26 words
A system according to claim 7, wherein said trellis decoder includes a comparison network for comparing said branch metric values to provide a decision representative output.
Claim 13
Dependent Claim
81 words
In a system for processing trellis encoded video data in different modes, said encoded data being subject to data type transitions including transitions resulting from data interruptions and mode changes, a decoding network comprising: a control network for generating a synchronization signal in response to a data type transition; and a trellis decoding network for trellis decoding said encoded data, wherein said decoding network employs a state transition trellis that resets to a predetermined state in response to said synchronization signal.
Claim 14
Dependent Claim
81 words
In a system for processing trellis encoded video data in different modes, said encoded data being subject to data type transitions including transitions resulting from data interruptions and mode changes, a decoding network comprising: a control network for generating a synchronization signal in response to a data type transition; and a trellis decoding network for trellis decoding said encoded data, wherein said decoding network employs a state transition trellis that resets to a predetermined state in response to said synchronization signal.
Claim 15
Dependent Claim
34 words
A system according to claim 12, wherein said system provides a configuration signal distinguishing between said modes; and said trellis decoding network adaptively trellis decodes said encoded data in response to said configuration signal.
Claim 16
Dependent Claim
15 words
A system according to claim 12, wherein said state transition trellis has eight trellis states.
Claim 17
Dependent Claim
27 words
A system according to claim 12, wherein said trellis decoding network includes a branch metric computer for providing branch metric values in response to said encoded data.
Claim 18
Dependent Claim
22 words
A system according to claim 15, wherein said branch metric computer values include a substantially replicated value in one of said modes.
Claim 19
Dependent Claim
24 words
A system according to claim 16, wherein said branch metric computer values include different numbers of substantially replicated branch metric values in different modes.
Claim 20
Dependent Claim
28 words
A system according to claim 15, wherein said trellis decoding network includes a Viterbi decoder for providing a Viterbi decoded output in response to said branch metric values.
Claim 21
Dependent Claim
27 words
A system according to claim 15, wherein said trellis decoding network includes a comparison network for comparing said branch metric values to provide a decision representative output.
Claim 22
Dependent Claim
80 words
In a system, for processing a trellis encoded video input signal, a method comprising the steps of: pre-processing said input signal by one of a plurality of pre-processing modes to provide a processed signal exhibiting one of a plurality of signal formats, said formats being associated with said modes; and trellis decoding said processed signal in accordance with a state transition trellis with the same number of trellis states for trellis decoding processed signals of a plurality of signal formats.
Claim 23
Dependent Claim
80 words
In a system, for processing a trellis encoded video input signal, a method comprising the steps of: pre-processing said input signal by one of a plurality of pre-processing modes to provide a processed signal exhibiting one of a plurality of signal formats, said formats being associated with said modes; and trellis decoding said processed signal in accordance with a state transition trellis with the same number of trellis states for trellis decoding processed signals of a plurality of signal formats.
Claim 24
Dependent Claim
72 words
In a system for processing trellis encoded video data in different modes, said encoded data being subject to data type transitions including transitions resulting from data interruptions and mode changes, a method comprising the steps of: generating a synchronization signal in response to a data type transition; and trellis decoding said encoded data in accordance with a state transition trellis that resets to a predetermined state in response to said synchronization signal.
Claim 25
Dependent Claim
72 words
In a system for processing trellis encoded video data in different modes, said encoded data being subject to data type transitions including transitions resulting from data interruptions and mode changes, a method comprising the steps of: generating a synchronization signal in response to a data type transition; and trellis decoding said encoded data in accordance with a state transition trellis that resets to a predetermined state in response to said synchronization signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-11-16 | 2002-05-18 | 2002-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-16 | 2006-05-18 | 2006-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-16 | 2010-05-18 | 2010-11-17 | $7700.00 | Window Closed / Lapsed |