US5761247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rob bit compensation system and method associated with a receiver or codec
Assignee: Telogy Networks Inc
•
Filing: 1996-08-23
•
Granted: 1998-06-02
•
Expires: 2016-08-23
Abstract
Abstract A rob bit compensation system improves the accuracy of digital signals received from and transmitted to a digital network, such as a telephone network, that employs rob bit signaling (RBS) wherein the network periodically robs a bit for its own use. The system can be employed within a digital modem or a coder/decoder (codec), each of which is interconnected with the digital network that periodically robs a bit every nth frame, where n is, for example, 6 or 24. The system can be implemented in association with the receive subsystem of the digital modem or in the communications paths within the codec associated with receiving data from the digital network. The system includes a compensation control utilized to detect when a least significant bit (LSB) of a particular frame of data consistently exhibits a certain logic state, either a mark (logical 1) or a space (logical 0). When an LSB of a particular frame does consistently exhibit the certain logic state, then the particular frame is considered an RBS frame. Furthermore, the compensation control causes a quantity (e.g., one-half of an LSB) to be mathematically combined (added or subtracted, whichever is appropriate) with the data corresponding with the RBS frame via a set of adders in order to enhance accuracy of the RBS frame.
Inventors
- 👤 William Lewis Betts
- 👤 Keith Alan Souders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:31
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0421; H04J; H04J3/00; H04J3/02; H04J3/12; H04J3/125
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
76 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; and means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, said means for modifying comprising a means for combining a value with said frame.
Claim 2
Independent Claim
76 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; and means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, said means for modifying comprising a means for combining a value with said frame.
Claim 3
Independent Claim
81 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; and means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced said means for modifying comprising a means for subtracting one half of a least significant bit to said frame.
Claim 4
Independent Claim
81 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; and means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced said means for modifying comprising a means for subtracting one half of a least significant bit to said frame.
Claim 5
Independent Claim
81 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; and means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, said means for modifying comprising a means for adding one half of a least significant bit to said frame.
Claim 6
Independent Claim
81 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; and means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, said means for modifying comprising a means for adding one half of a least significant bit to said frame.
Claim 7
Independent Claim
141 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced; logic configured to receive a least significant bit from each frame of said digital data and a ring counter signal, said logic configured to produce a control signal based upon said digital data and said ring counter signal; a ring counter configured to receive said least significant bit of each said frame, said ring counter configured to generate said ring counter signal; and an adder configured to mathematically combine a quantity with said digital data based upon said control signal.
Claim 8
Independent Claim
141 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced; logic configured to receive a least significant bit from each frame of said digital data and a ring counter signal, said logic configured to produce a control signal based upon said digital data and said ring counter signal; a ring counter configured to receive said least significant bit of each said frame, said ring counter configured to generate said ring counter signal; and an adder configured to mathematically combine a quantity with said digital data based upon said control signal.
Claim 9
Independent Claim
181 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced; logic configured to receive a least significant bit from each frame of said digital data, a mark ring counter signal, and a space ring counter signal, said logic configured to produce a control signal based upon said digital data and said mark and space ring counter signals; a mark ring counter configured to receive said least significant bit of each said frame, said mark ring counter configured to generate said mark ring counter signal; and a space ring counter configured to receive said least significant bit of each said frame, said space ring counter configured to generate said space ring counter signal; and an adder configured to mathematically combine a quantity with said digital data based upon said control signal.
Claim 10
Independent Claim
181 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced; logic configured to receive a least significant bit from each frame of said digital data, a mark ring counter signal, and a space ring counter signal, said logic configured to produce a control signal based upon said digital data and said mark and space ring counter signals; a mark ring counter configured to receive said least significant bit of each said frame, said mark ring counter configured to generate said mark ring counter signal; and a space ring counter configured to receive said least significant bit of each said frame, said space ring counter configured to generate said space ring counter signal; and an adder configured to mathematically combine a quantity with said digital data based upon said control signal.
Claim 11
Independent Claim
82 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, and wherein said frame is every nth frame of said digital data, where n is any integer number greater than zero.
Claim 12
Independent Claim
82 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, and wherein said frame is every nth frame of said digital data, where n is any integer number greater than zero.
Claim 13
Independent Claim
72 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced; and means for transmitting said modified frame to an analog connection.
Claim 14
Independent Claim
72 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having a rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced; and means for transmitting said modified frame to an analog connection.
Claim 15
Dependent Claim
78 words
A computer readable medium having a program for improving accuracy of a digital signal received from a digital network that periodically robs a bit, the program comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, and means for transmitting said modified frame to an analog connection.
Claim 16
Dependent Claim
78 words
A computer readable medium having a program for improving accuracy of a digital signal received from a digital network that periodically robs a bit, the program comprising: means for receiving digital data from said digital network; means for detecting a frame in said digital data having rob bit; means for modifying said frame so that error associated with said frame resulting from said rob bit is reduced, and means for transmitting said modified frame to an analog connection.
Claim 17
Independent Claim
72 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; and modifying said frame so that error associated with said frame resulting from said rob bit is reduced, wherein said modifying step comprises the step of combining a value with said frame.
Claim 18
Independent Claim
72 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; and modifying said frame so that error associated with said frame resulting from said rob bit is reduced, wherein said modifying step comprises the step of combining a value with said frame.
Claim 19
Independent Claim
77 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; and modifying said frame so that error associated with said frame resulting from said rob bit is reduced, wherein said modifying step comprises the step of subtracting one half of a least significant bit from said frame.
Claim 20
Independent Claim
77 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; and modifying said frame so that error associated with said frame resulting from said rob bit is reduced, wherein said modifying step comprises the step of subtracting one half of a least significant bit from said frame.
Claim 21
Independent Claim
77 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; and modifying said frame so that error associated with said frame resulting from said rob bit is reduced, wherein said modifying step comprises the step of adding one half of a least significant bit from said frame.
Claim 22
Independent Claim
77 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; and modifying said frame so that error associated with said frame resulting from said rob bit is reduced, wherein said modifying step comprises the step of adding one half of a least significant bit from said frame.
Claim 23
Independent Claim
105 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; modifying said frame so that error associated with said frame resulting from said rob bit is reduced; detecting when a least significant bit of a particular frame of said digital data consistently exhibits a certain logic state; and combining a quantity with said digital data corresponding with said particular frame when said least significant bit of said particular frame consistently exhibits said certain logic state.
Claim 24
Independent Claim
105 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; modifying said frame so that error associated with said frame resulting from said rob bit is reduced; detecting when a least significant bit of a particular frame of said digital data consistently exhibits a certain logic state; and combining a quantity with said digital data corresponding with said particular frame when said least significant bit of said particular frame consistently exhibits said certain logic state.
Claim 25
Dependent Claim
13 words
The method of claim 12, wherein said certain logic state is a mark.
Claim 26
Dependent Claim
13 words
The method of claim 12, wherein said certain logic state is a space.
Claim 27
Dependent Claim
37 words
The method of claim 12, further comprising the steps of: evaluating said least significant bit to detect when said bit exhibits a mark; and evaluating said least significant bit to detect when said bit exhibits a space.
Claim 28
Independent Claim
75 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; modifying said frame so that error associated with said frame resulting from said rob bit is reduced; and modifying every nth frame of said digital data, where n is any integer number greater than zero.
Claim 29
Independent Claim
75 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; modifying said frame so that error associated with said frame resulting from said rob bit is reduced; and modifying every nth frame of said digital data, where n is any integer number greater than zero.
Claim 30
Independent Claim
73 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; modifying said frame so that error associated with said frame resulting from said rob bit is reduced; and after said modifying step, transmitting said frame of said digital data to an analog connection.
Claim 31
Independent Claim
73 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: receiving digital data from said digital network; detecting a frame in said digital data having rob bit; modifying said frame so that error associated with said frame resulting from said rob bit is reduced; and after said modifying step, transmitting said frame of said digital data to an analog connection.
References Cited (Backward Citations)
US3452330A
Cited
US4529979A
Cited
US4571736A
Cited
US4885755A
Cited
US4928276A
Cited
US4926355A
Cited
US5027356A
Cited
US4856030A
Cited
US5263081A
Cited
US5491695A
Cited
US5282197A
Cited
US5506956A
Cited
US5577196A
Cited
US5528579A
Cited
US5406583A
Cited
US5422876A
Cited
US5533121A
Cited
US5528625A
Cited
US5577105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |