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    11.
    发明专利
    未知

    公开(公告)号：AT385378T

    公开(公告)日：2008-02-15

    申请号：AT00926453

    申请日：2000-04-28

    Applicant: TELOGY NETWORKS INC

    Inventor： FRUTH FRANK ,  AKTAR SHAHID ,  WRIGHT JEFF

    IPC: H04N1/32 ,  H04N1/00 ,  H04N1/409 ,  H04N1/41

    Abstract: A device and method for providing real time compensation for packet loss in the transmission of facsimile data over packet networks to avoid the generation of page loss data and the termination of facsimile transmission. Facsimile devices have a low tolerance for interruptions in transmission. Packet networks commonly have a transmission interruption rate above the tolerance of facsimile equipment. In order to compensate for transmission interruption, the present invention teaches the buffering of facsimile data by scan line at the receiving end, the evaluation of buffered scan lines for packet loss and the discarding of scan lines having packet loss to conceal the packet loss from the receiving facsimile equipment to avoid detection of page errors by the receiving facsimile equipment which could cause loss of facsimile transmission. Discarding damaged scan lines instead of repair or replacement saves computational time and storage capacity, allowing for real-time compensation to provide for optimal transmission.

    Proxy internet browsing
    14.
    发明专利
    Proxy internet browsing 未知

    公开(公告)号：AU4054700A

    公开(公告)日：2001-10-15

    申请号：AU4054700

    申请日：2000-03-31

    Applicant: TELOGY NETWORKS INC

    Inventor： FLANAGAN THOMAS F

    IPC: G06F17/30 ,  H04L29/08 ,  G06F13/00 ,  G06F15/00

    Abstract: The present invention provides proxy browsing on the Internet 16 whereby the user interface of one device, such as a personal computer 10 with a Web browser, causes servers 14 to interact with alternate client devices 20, 24 linked to the Internet 16 that are remotely located from the personal computer. A user may activate a proxy browser on a PC 10 , select one or more files or commands from a Web server 14 , and download the files or commands directly from the servers to client devices 20, 24.

    15.
    发明专利
    未知

    公开(公告)号：AT498177T

    公开(公告)日：2011-02-15

    申请号：AT99940979

    申请日：1999-08-10

    Applicant: TELOGY NETWORKS INC

    Inventor： KOSANOVIC BOGDAN

    IPC: G10L11/00 ,  G10L21/02 ,  G10L11/02 ,  H04B3/20 ,  H04B17/00

    Abstract: A method of estimating background noise in a signal. The signal is divided into blocks of equal predetermined length. The minimum energy of the signal during the length of each block is determined. The minimum energy determined for the current block is compared to a previous determination of minimum energy. If the current minimum energy exceeds a predetermined maximum energy level, the current block minimum energy is discarded and the previous determination remains unchanged. If the current block minimum energy is below the previous determination, the previous estimate is reduced by the difference between the previous determination and current minimum energy. If the current energy is above the previous determination but below the maximum, the previous estimate is increased by half of the difference between the current energy and the previous estimate. The increase factor may also be adjusted to increase the current estimated energy level by a factor of any amount between and including 0 and 1. The estimation of minimum energy, or background energy, therefore decreases in direct proportion to a drop in minimum energy determination but increases only as a partial factor of new determinations.

    16.
    发明专利
    未知

    公开(公告)号：DE60231699D1

    公开(公告)日：2009-05-07

    申请号：DE60231699

    申请日：2002-12-23

    Applicant: TELOGY NETWORKS INC

    Inventor： ZHANG YIMIN ,  KOSANOVIC BOGDAN

    IPC: H04B3/46

    Abstract: A method of estimating an echo return loss of a communication link measures the peak power value of a signal received from a far end of a communication link and the corresponding peak power value of a signal received from the near end of the communication link. When the near end signal is free from near end voice and excessive noise, the near end corresponding peak will be the echo of the far end power. The far end power is monitored and when a peak is detected, a period, which can be equal to a filter length period, is initiated. When the period has run, the delay line attached to the near end is polled to determine the peak power in the delay line. This peak power will correspond to the far end peak. If a peak, exceeding the first peak is detected before the period has run, the period is reinitiated. The echo return loss estimate is calculated as a ratio of the far-end peak power value to the near-end peak power value. The measured far-end signal is the payload information that the communication link was established to convey and the measured near-end signal is the echo of the payload.

    18.
    发明专利
    未知

    公开(公告)号：DE69429037T2

    公开(公告)日：2002-08-14

    申请号：DE69429037

    申请日：1994-07-06

    Applicant: TELOGY NETWORKS INC

    Inventor： BETTS WILLIAM LEWIS

    IPC: H04L25/03 ,  H04L25/49 ,  H04L25/497 ,  H04L27/34

    Abstract: In a system that uses a dither signal d(k) in the production or a transmitted signal, the recoverability of an original trellis code is maintained while forming the dither signal using a modulo value that is equal to the distance between two adjacent symbols. This is accomplished by forming individual modulo counts (xcnt, ycnt) for each of the orthogonal components produced by the transmitter's 3-tap FIR filter (66). The modulo counts and the bits from the trellis encoder (50) are used to substitute the constellation subset identified by the trellis encoder (50) with another constellation subset. The substituted subset is used for transmission and results in recovery of the original trellis code by the trellis decoder in the receiver.

    A generalized precoder for the upstream voiceband modem channel
    19.
    发明专利
    A generalized precoder for the upstream voiceband modem channel 未知

    公开(公告)号：AU5029100A

    公开(公告)日：2001-08-20

    申请号：AU5029100

    申请日：2000-05-19

    Applicant: TELOGY NETWORKS INC

    Inventor： MODLIN CORY S

    IPC: H04L25/49 ,  H04B1/38 ,  H04L5/16

    Abstract: For PCM upstream, the analog modem must transmit a filtered sequence of symbols so that the samples of the signal at the input to the codec at the central office (CO) are at a predetermined set of levels. This requires that the analog modem use an 8 kHz symbol rate synchronized to the co clock. Typical telephone channels have nulls at DC and at 4 kHz. Therefore, for best performance, the signal transmitted by the analog modem should be spectrally shaped to match the channel. The present invention utilizes a qeneralized Laroia-Tretter-Farvardin (LTF) precoder similar to the one used in V.34. This precoder structure allows spectral shaping and could also allow for constellation shaping gains. Using this precoder structure with spectral shaping has the potential to improve data rates by 3-3.5 kbps.

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