Coded data generation or conversion – Digital code to digital code converters – With error detection or correction
Patent
1997-02-19
1998-09-22
Young, Brian K.
Coded data generation or conversion
Digital code to digital code converters
With error detection or correction
370522, 370523, 379 93, 39518202, H03M 1300
Patent
active
058120750
ABSTRACT:
A compensation system is configured to improve the accuracy of digital signals that are communicated through a digital network by reducing loss from digital attenuation quantization (DAQ; digital pad quantization) and rob bit signaling (RBS). The combined DAQ/RBS compensation system can be employed within a transmitting modem connected to the digital network and is constructed as follows. In a first embodiment, a first adjustment mechanism combines a DAQ compensation quantity with each segment of the digital data, prior to transmission, in order to enhance accuracy of the received digital data. The value of the DAQ compensation quantity depends on feedback that is provided to the compensation system during a series of test transmissions. Next, the word is communicated to a linear-mu-linear converter, which is configured to simulate a digital transmission by mu-law encoding each digital data word into a code word and then subsequently mu-law decoding each code word back into a linear digital data word, while taking into account the compensation quantity during the encoding/decoding process. In addition, the linear-mu-linear converter includes an RBS compensation system that causes an RBS compensation quantity to be mathematically combined with each segment to be tainted by RBS in order to enhance accuracy of the RBS segments, which typically occur periodically. A second adjustment mechanism is connected to the linear-mu-linear converter. The second adjustment mechanism combines the reciprocal of the DAQ compensation quantity with the linear data from the linear-mu-linear converter. Finally, the linear digital data word is passed from the linear-mu-linear converter to a linear-mu converter for conversion into a mu-law code word and transmission to the network. In a second embodiment of the combined DAQ/RBS system, the RBS compensation system is not implemented within, but after, the linear-mu-linear converter.
REFERENCES:
patent: 3452330 (1969-06-01), Avery
patent: 4529979 (1985-07-01), Kusama et al.
patent: 4571736 (1986-02-01), Agrawal et al.
patent: 4856030 (1989-08-01), Batzer et al.
patent: 4885755 (1989-12-01), Yoshida
patent: 4926355 (1990-05-01), Boreland
patent: 4928276 (1990-05-01), Blondeau, Jr. et al.
patent: 5027356 (1991-06-01), Nakamura et al.
patent: 5263081 (1993-11-01), Nightingale et al.
patent: 5282197 (1994-01-01), Kreitzer
patent: 5406583 (1995-04-01), Dagdeviren
patent: 5422876 (1995-06-01), Turudic
patent: 5491695 (1996-02-01), Meagher et al.
patent: 5506956 (1996-04-01), Cohen
patent: 5528579 (1996-06-01), Wadman et al.
patent: 5528625 (1996-06-01), Ayanoglu et al.
patent: 5533121 (1996-07-01), Suzuki et al.
patent: 5577105 (1996-11-01), Baum et al.
patent: 5577196 (1996-11-01), Peer
"Digital Channel Bank Requirements and Objectives," Bell System Technical Reference (PUB 43801), AT&T, Nov. 1982.
Betts William Lewis
Souders Keith Alan
Kost Jason L. W.
Paradyne Corporation
Young Brian K.
LandOfFree
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