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公开(公告)号：DE69733692T2
公开(公告)日：2006-05-04
申请号：DE69733692
申请日：1997-05-05
Applicant: TELOGY NETWORKS INC
Inventor： BETTS LEWIS , SOUDERS ALAN
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Patent Agency Ranking
公开(公告)号：DE69733692D1
公开(公告)日：2005-08-11
申请号：DE69733692
申请日：1997-05-05
Applicant: TELOGY NETWORKS INC
Inventor： BETTS LEWIS , SOUDERS ALAN
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公开(公告)号：DE69737098T2
公开(公告)日：2007-06-28
申请号：DE69737098
申请日：1997-06-25
Applicant: TELOGY NETWORKS INC
Inventor： BETTS LEWIS , SOUDERS ALAN
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.
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公开(公告)号：DE69737098D1
公开(公告)日：2007-01-25
申请号：DE69737098
申请日：1997-06-25
Applicant: TELOGY NETWORKS INC
Inventor： BETTS LEWIS , SOUDERS ALAN
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.
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公开(公告)号：DE69736181T2
公开(公告)日：2007-05-03
申请号：DE69736181
申请日：1997-05-05
Applicant: TELOGY NETWORKS INC
Inventor： BETTS LEWIS , SOUDERS ALAN
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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公开(公告)号：DE69736181D1
公开(公告)日：2006-08-03
申请号：DE69736181
申请日：1997-05-05
Applicant: TELOGY NETWORKS INC
Inventor： BETTS LEWIS , SOUDERS ALAN
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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