US5995558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rob bit compensation system and method associated with a receiver or codec
Assignee: Telogy Networks Inc
•
Filing: 1997-09-23
•
Granted: 1999-11-30
•
Expires: 2017-09-23
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 18:27
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0421; H04J; H04J3/00; H04J3/02; H04J3/12; H04J3/125
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
86 words
A system for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising: a means for receiving digital data from said digital network; a means for detecting an RBS frame that has been distorted by said RBS in said digital data said detecting means including a means for analyzing a bit value of said RBS frame; and a means for modifying said RBS frame so that error associated with said RBS frame resulting from said RBS is reduced.
Claim 2
Independent Claim
86 words
A system for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising: a means for receiving digital data from said digital network; a means for detecting an RBS frame that has been distorted by said RBS in said digital data said detecting means including a means for analyzing a bit value of said RBS frame; and a means for modifying said RBS frame so that error associated with said RBS frame resulting from said RBS is reduced.
Claim 3
Dependent Claim
24 words
The system of claim 1, wherein said means for receiving, said means for detecting, and said means for modifying are all implemented in software.
Claim 4
Dependent Claim
27 words
The system of claim 1, wherein said means for receiving, said means for detecting, and said means for modifying are all implemented in a digital signal processor.
Claim 5
Dependent Claim
36 words
The system of claim 1, wherein said digital data is mu-law coded and further comprising a mu-to-linear converter connected to said means for modifying and configured to convert said mu-law digital data to linear digital data.
Claim 6
Dependent Claim
19 words
The system of claim 1, wherein said bit value corresponds to a least significant bit of said RBS frame.
Claim 7
Dependent Claim
87 words
A computer readable medium having a program for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), the program comprising: a means for receiving digital data from said digital network; a means for detecting implementation of said RBS in said digital network, said detecting means including a means for analyzing a bit value of said RBS frame; and a means for modifying said digital data so that error associated with said digital data resulting from said RBS is reduced.
Claim 8
Dependent Claim
87 words
A computer readable medium having a program for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), the program comprising: a means for receiving digital data from said digital network; a means for detecting implementation of said RBS in said digital network, said detecting means including a means for analyzing a bit value of said RBS frame; and a means for modifying said digital data so that error associated with said digital data resulting from said RBS is reduced.
Claim 9
Independent Claim
76 words
A method for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising the steps of: transmitting digital data over an analog connection; receiving said digital data from said digital network; detecting an RBS frame that is distorted by said RBS in said digital data received from said digital network; and modifying said RBS frame so that error associated with said RBS frame resulting from RBS is reduced.
Claim 10
Independent Claim
76 words
A method for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising the steps of: transmitting digital data over an analog connection; receiving said digital data from said digital network; detecting an RBS frame that is distorted by said RBS in said digital data received from said digital network; and modifying said RBS frame so that error associated with said RBS frame resulting from RBS is reduced.
Claim 11
Independent Claim
71 words
A method for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising the steps of: receiving a frame of digital data; analyzing said frame of digital data; determining whether said frame of digital data is distorted by said RBS based on said analyzing step; and compensating said digital data to reduce RBS distortion when said digital data is distorted by said RBS.
Claim 12
Independent Claim
71 words
A method for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising the steps of: receiving a frame of digital data; analyzing said frame of digital data; determining whether said frame of digital data is distorted by said RBS based on said analyzing step; and compensating said digital data to reduce RBS distortion when said digital data is distorted by said RBS.
Claim 13
Dependent Claim
21 words
The method of claim 8, wherein said bit value corresponds to a least significant bit of said frame of digital data.
Claim 14
Independent Claim
88 words
A method for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising the steps of: receiving digital data; determining whether said digital data is distorted by said RBS; and compensating said digital data to reduce RBS distortion, wherein said step of determining includes the step of comparing a frame of digital data to a reference and said step of compensating includes the step of combining a compensation quantity with any said frame that is subjected to said RBS distortion.
Claim 15
Independent Claim
88 words
A method for improving accuracy of a digital signal received from a digital network that employs rob bit signalling (RBS), comprising the steps of: receiving digital data; determining whether said digital data is distorted by said RBS; and compensating said digital data to reduce RBS distortion, wherein said step of determining includes the step of comparing a frame of digital data to a reference and said step of compensating includes the step of combining a compensation quantity with any said frame that is subjected to said RBS distortion.
Claim 16
Independent Claim
69 words
A system for improving accuracy of data communication via a digital network that employs rob bit signalling (RBS), comprising: a receiver configured to receive digital data; a means for determining whether said digital data is distorted by said RBS, said determining means including a means for comparing a bit value of said digital data to another value; and a means for compensating said digital data to reduce RBS distortion.
Claim 17
Independent Claim
69 words
A system for improving accuracy of data communication via a digital network that employs rob bit signalling (RBS), comprising: a receiver configured to receive digital data; a means for determining whether said digital data is distorted by said RBS, said determining means including a means for comparing a bit value of said digital data to another value; and a means for compensating said digital data to reduce RBS distortion.
Claim 18
Independent Claim
75 words
A system for improving accuracy of data communication via a digital network that employs rob bit signalling (RBS), comprising: a receiver configured to receive digital data; a means for determining whether said digital data is distorted by said RBS; and a means for compensating said digital data to reduce RBS distortion, wherein said compensating means includes a means for combining a quantity with a frame of digital data that is subjected to said RBS distortion.
Claim 19
Independent Claim
75 words
A system for improving accuracy of data communication via a digital network that employs rob bit signalling (RBS), comprising: a receiver configured to receive digital data; a means for determining whether said digital data is distorted by said RBS; and a means for compensating said digital data to reduce RBS distortion, wherein said compensating means includes a means for combining a quantity with a frame of digital data that is subjected to said RBS distortion.
Claim 20
Independent Claim
82 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: initializing a reference value; receiving a plurality of frames of digital data; comparing a value of a respective bit of each of said plurality of frames to said reference value; determining whether said digital data is distorted by a robbed bit based on said comparing step; and compensating said digital data for an error associated with said robbed bit.
Claim 21
Independent Claim
82 words
A method for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising the steps of: initializing a reference value; receiving a plurality of frames of digital data; comparing a value of a respective bit of each of said plurality of frames to said reference value; determining whether said digital data is distorted by a robbed bit based on said comparing step; and compensating said digital data for an error associated with said robbed bit.
Claim 22
Dependent Claim
19 words
The method of claim 13, further comprising the step of modifying said reference value based on said comparing step.
Claim 23
Independent Claim
68 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; determining whether said digital data is distorted by a robbed bit; and compensating said digital data for an error associated with said robbed bit, wherein said compensating step includes the step of adding a quantity to a frame of said digital data.
Claim 24
Independent Claim
68 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; determining whether said digital data is distorted by a robbed bit; and compensating said digital data for an error associated with said robbed bit, wherein said compensating step includes the step of adding a quantity to a frame of said digital data.
Claim 25
Dependent Claim
15 words
The method of claim 15, wherein said quantity is one-half of a least significant bit.
Claim 26
Independent Claim
68 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; determining whether said digital data is distorted by a robbed bit; and compensating said digital data for an error associated with said robbed bit, wherein said compensating step includes the step of subtracting a quantity from a frame of said digital data.
Claim 27
Independent Claim
68 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; determining whether said digital data is distorted by a robbed bit; and compensating said digital data for an error associated with said robbed bit, wherein said compensating step includes the step of subtracting a quantity from a frame of said digital data.
Claim 28
Dependent Claim
15 words
The method of claim 17, wherein said quantity is one-half of a least significant bit.
Claim 29
Independent Claim
61 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: a means for transmitting digital data over an analog connection and through said digital network; a means for receiving said digital data from said transmitting means; and a means for reducing distortion in said digital data caused by a robbed bit.
Claim 30
Independent Claim
61 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: a means for transmitting digital data over an analog connection and through said digital network; a means for receiving said digital data from said transmitting means; and a means for reducing distortion in said digital data caused by a robbed bit.
Claim 31
Independent Claim
59 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: a means for receiving digital data; and a means for reducing distortion in said digital data caused by a robbed bit, wherein said means for reducing includes an adder to combine a quantity to a frame of digital data.
Claim 32
Independent Claim
59 words
A system for improving accuracy of a digital signal received from a digital network that periodically robs a bit, comprising: a means for receiving digital data; and a means for reducing distortion in said digital data caused by a robbed bit, wherein said means for reducing includes an adder to combine a quantity to a frame of digital data.
Claim 33
Dependent Claim
83 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: receiving logic configured to receive digital data; determining logic configured to determine whether a frame of said digital data includes a robbed bit based on a comparison of a bit value of said frame to a reference value; and compensating logic configured to reduce error in said digital data from distortion caused by said robbed bit.
Claim 34
Dependent Claim
83 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: receiving logic configured to receive digital data; determining logic configured to determine whether a frame of said digital data includes a robbed bit based on a comparison of a bit value of said frame to a reference value; and compensating logic configured to reduce error in said digital data from distortion caused by said robbed bit.
Claim 35
Dependent Claim
92 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 receiving logic configured to receive digital data; and compensating logic configured to reduce error in said digital data from distortion caused by a robbed bit, wherein said compensating logic further comprises: detecting logic configured to detect whether a frame of said digital data has said robbed bit; and combining logic configured to combine a quantity to said frame when said frame has said robbed bit.
Claim 36
Dependent Claim
92 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 receiving logic configured to receive digital data; and compensating logic configured to reduce error in said digital data from distortion caused by a robbed bit, wherein said compensating logic further comprises: detecting logic configured to detect whether a frame of said digital data has said robbed bit; and combining logic configured to combine a quantity to said frame when said frame has said robbed bit.
Claim 37
Independent Claim
108 words
A method for improving accuracy of digital data received from a digital network that periodically forces at least one bit of said digital data to a certain binary logic level, comprising the steps of: receiving a frame of said digital data from said digital network; determining whether said frame of digital data has at least one bit forced to said certain binary logic level by said digital network; analyzing said at least one bit during said determining step; and compensating said frame of digital data to reduce distortion caused by said digital network forcing at least one bit of said digital data to said certain binary logic level.
Claim 38
Independent Claim
108 words
A method for improving accuracy of digital data received from a digital network that periodically forces at least one bit of said digital data to a certain binary logic level, comprising the steps of: receiving a frame of said digital data from said digital network; determining whether said frame of digital data has at least one bit forced to said certain binary logic level by said digital network; analyzing said at least one bit during said determining step; and compensating said frame of digital data to reduce distortion caused by said digital network forcing at least one bit of said digital data to said certain binary logic level.
Claim 39
Independent Claim
115 words
A method for improving accuracy of digital data received from a digital network that periodically forces at least one bit of said digital data to a certain binary logic level, comprising the steps of: receiving a frame of said digital data from said digital network; determining whether said frame of digital data has at least one bit forced to said certain binary logic level by said digital network; and compensating said frame of digital data to reduce distortion caused by said digital network forcing at least one bit of said digital data to said certain binary logic level, wherein said compensating step includes the step of combining a quantity to said frame of digital data.
Claim 40
Independent Claim
115 words
A method for improving accuracy of digital data received from a digital network that periodically forces at least one bit of said digital data to a certain binary logic level, comprising the steps of: receiving a frame of said digital data from said digital network; determining whether said frame of digital data has at least one bit forced to said certain binary logic level by said digital network; and compensating said frame of digital data to reduce distortion caused by said digital network forcing at least one bit of said digital data to said certain binary logic level, wherein said compensating step includes the step of combining a quantity to said frame of digital data.
References Cited (Backward Citations)
US3452330A
Cited
US4529979A
Cited
US4589111A
Cited
US4571736A
Cited
US4677645A
Cited
US4720829A
Cited
US4885755A
Cited
US4928276A
Cited
US4926355A
Cited
US5027356A
Cited
US4856030A
Cited
US5263081A
Cited
US5502733A
Cited
US5491695A
Cited
US5282197A
Cited
US5506956A
Cited
US5577196A
Cited
US5528579A
Cited
US5406583A
Cited
US5422876A
Cited
US5533121A
Cited
US5528625A
Cited
US5577105A
Cited
US5724939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-29 | 2003-05-31 | 2003-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-29 | 2007-05-31 | 2007-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-29 | 2011-05-31 | 2011-11-30 | $7700.00 | Window Closed / Lapsed |