Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Patent
1996-08-23
1998-05-19
Bocure, Tesfaldet
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
375358, 371 34, 370523, H04B 1500
Patent
active
057545944
ABSTRACT:
A cooperative feedback system is provided for a compensation system associated with, for example, a transmitter or codec, for enabling the compensation system to improve the accuracy of digital signals transmitted to a digital network. The cooperative feedback system is particularly suited for providing feedback to a compensation system for correcting distortion resulting from rob bit signaling (RBS), digital loss, or other types of digital signal degradation. The cooperative feedback system includes a compensation selector in a transmitter (e.g., digital modem, analog modem, codec, etc.) that combines compensations with frames of digital data by way of an addition mechanism to produce modified digital data frames. The transmitter is configured to transmit the modified digital data frames into the digital network. A receiver (e.g., digital modem, analog modem, etc.) is configured to receive the modified digital data frames from the digital network, to determine if accuracy of each of the modified digital data frames has increased based upon a corresponding compensation, and to communicate one or more quality feedback signals to the transmitter via the digital network. The one or more quality feedback signals indicate whether the accuracy of each of the digital data frames has increased based upon the corresponding compensations. The transmitter receives the quality feedback signal(s) and selects and implements the compensation that yields a highest accuracy based upon the quality feedback signal(s).
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Method and Apparatus Compensating for Effects of Digital Loss Insertion In Signal Transmissions Between Modems, Application Serial No. 08/390,185; Filed Feb. 17, 1995.
Betts William Lewis
Souders Keith Alan
Bocure Tesfaldet
Paradyne Corporation
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