HK1040342B - 識別交換機編解碼器的編碼類型的方法和裝置 - Google Patents

識別交換機編解碼器的編碼類型的方法和裝置

Info

Publication number
HK1040342B
HK1040342B HK02100630.4A HK02100630A HK1040342B HK 1040342 B HK1040342 B HK 1040342B HK 02100630 A HK02100630 A HK 02100630A HK 1040342 B HK1040342 B HK 1040342B
Authority
HK
Hong Kong
Prior art keywords
identifying
central office
encoding type
office codec
codec
Prior art date
Application number
HK02100630.4A
Other languages
English (en)
Other versions
HK1040342A1 (en
Inventor
Zhang Xuming
Zhou Zhenyu
Original Assignee
Conexant Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conexant Systems Inc filed Critical Conexant Systems Inc
Publication of HK1040342A1 publication Critical patent/HK1040342A1/xx
Publication of HK1040342B publication Critical patent/HK1040342B/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
    • H04L25/4927—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using levels matched to the quantisation levels of the channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13034—A/D conversion, code compression/expansion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13199—Modem, modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13204—Protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13216—Code signals, frame structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13292—Time division multiplexing, TDM
HK02100630.4A 1998-09-30 2002-01-25 識別交換機編解碼器的編碼類型的方法和裝置 HK1040342B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/164,155 US6381266B1 (en) 1998-09-30 1998-09-30 Method and apparatus for identifying the encoding type of a central office codec
PCT/US1999/019527 WO2000019768A1 (en) 1998-09-30 1999-08-26 Method and apparatus for identifying the encoding type of a central office codec

Publications (2)

Publication Number Publication Date
HK1040342A1 HK1040342A1 (en) 2002-05-31
HK1040342B true HK1040342B (zh) 2005-01-07

Family

ID=22593224

Family Applications (1)

Application Number Title Priority Date Filing Date
HK02100630.4A HK1040342B (zh) 1998-09-30 2002-01-25 識別交換機編解碼器的編碼類型的方法和裝置

Country Status (5)

Country Link
US (3) US6381266B1 (zh)
EP (1) EP1118242B1 (zh)
DE (1) DE69917304T2 (zh)
HK (1) HK1040342B (zh)
WO (1) WO2000019768A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6381266B1 (en) * 1998-09-30 2002-04-30 Conexant Systems, Inc. Method and apparatus for identifying the encoding type of a central office codec
US6181737B1 (en) * 1999-01-28 2001-01-30 Pc Tel, Inc. Distinguishing received A-law and μ-law signals in a PCM modem
US6721279B1 (en) * 1999-02-02 2004-04-13 Pctel, Inc. Method and apparatus for adaptive PCM level estimation and constellation training
US6570917B1 (en) * 1999-03-10 2003-05-27 Agere Systems Inc. Equalizer training in the presence of network impairment
US6600780B1 (en) 1999-03-10 2003-07-29 Agere Systems Inc. Apparatus and method for adapting a filter of an analog modem
US6721363B1 (en) 1999-06-24 2004-04-13 Intel Corporation Receiver CODEC super set constellation generator
US6721357B1 (en) 1999-06-24 2004-04-13 Intel Corporation Constellation generation and re-evaluation
US6724814B1 (en) * 1999-06-24 2004-04-20 Intel Corporation Pad and CODEC detection
US7366470B1 (en) 1999-06-24 2008-04-29 Intel Corporation Inter-modulation distortion compensation
US7339996B2 (en) 1999-06-24 2008-03-04 Intel Corporation Receiver codec super set constellation generator
US7307980B1 (en) * 1999-07-02 2007-12-11 Cisco Technology, Inc. Change of codec during an active call
US6650657B1 (en) * 1999-10-29 2003-11-18 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modem signals
US6687306B1 (en) * 2000-03-16 2004-02-03 Agere Systems Inc. Constellation adjustment based on detected encoding and encoding conversion for modem connections
US6693967B1 (en) * 2000-03-16 2004-02-17 Agere Systems Inc. Detecting encoding and encoding conversion for modem connections
US6751260B1 (en) * 2000-03-16 2004-06-15 Agere Systems, Inc. Detecting superimposed information channels for modem connections
US6560277B2 (en) * 2001-02-09 2003-05-06 Pc Tel, Inc. Distinguishing between final coding of received signals in a PCM modem
US7180916B2 (en) * 2001-04-27 2007-02-20 Agere Systems Inc. Compensating for random robbed bit signaling
EP1449386B1 (de) * 2001-11-27 2008-04-09 Nokia Siemens Networks Gmbh & Co. Kg Verfahren zum austauschen von nach unterschiedlichen codierungsgesetzen erzeugten nutzinformationen zwischen wenigstens 2 teilnehmerendeinrichtungen
US7472057B2 (en) * 2003-10-17 2008-12-30 Broadcom Corporation Detector for use in voice communications systems

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US4243342A (en) * 1979-07-27 1981-01-06 J. I. Case Company Snap fast fastener
JPS5723356A (en) * 1980-07-02 1982-02-06 Hitachi Ltd Sound signal converter
JPS58165441A (ja) * 1982-03-26 1983-09-30 Hitachi Ltd Ｐｃｍ信号符号器
JPH0657075B2 (ja) * 1984-05-29 1994-07-27 富士通株式会社 ディジタル通話路装置
US4819253A (en) * 1988-05-16 1989-04-04 Bell Communications Research, Inc. Method for determining PCM coding law
US5243342A (en) * 1990-09-28 1993-09-07 Stratacom, Inc. Integrated PCM level control and conversion using a lookup table
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JPH07123172A (ja) * 1993-10-25 1995-05-12 Canon Inc 端末装置
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US6381266B1 (en) * 1998-09-30 2002-04-30 Conexant Systems, Inc. Method and apparatus for identifying the encoding type of a central office codec

Also Published As

Publication number Publication date
US20040013185A1 (en) 2004-01-22
US6381266B1 (en) 2002-04-30
HK1040342A1 (en) 2002-05-31
EP1118242B1 (en) 2004-05-12
DE69917304D1 (de) 2004-06-17
US6614839B2 (en) 2003-09-02
WO2000019768A1 (en) 2000-04-06
DE69917304T2 (de) 2005-05-12
EP1118242A1 (en) 2001-07-25
US20020085629A1 (en) 2002-07-04
US7173963B2 (en) 2007-02-06

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20150826