KR100520161B1 - 국설교환기와isdn키폰시스템과의코딩변환회로 - Google Patents
국설교환기와isdn키폰시스템과의코딩변환회로 Download PDFInfo
- Publication number
- KR100520161B1 KR100520161B1 KR10-1998-0060820A KR19980060820A KR100520161B1 KR 100520161 B1 KR100520161 B1 KR 100520161B1 KR 19980060820 A KR19980060820 A KR 19980060820A KR 100520161 B1 KR100520161 B1 KR 100520161B1
- Authority
- KR
- South Korea
- Prior art keywords
- law
- coding method
- isdn
- voice coding
- local exchange
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
- H04B14/048—Non linear compression or expansion
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- 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
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0435—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13031—Pulse code modulation, PCM
-
- 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
- H04Q2213/1322—PBX
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13334—Key telephone systems
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Computational Linguistics (AREA)
- Nonlinear Science (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Telephonic Communication Services (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Exchange Systems With Centralized Control (AREA)
Abstract
Description
Claims (2)
- ISDN키폰시스템과 국설교환기와의 PCM코딩회로에 있어서,상기 국설교환기의 코딩방식에 따라 ISDN키폰시스템에서 입력되는 PCM 데이타에 대해 A/μ-Law 음성코딩방식으로 변환시키시 위한 제어신호를 발생하는 제어부와, 상기 제어부의 출력으로부터 상기 국설교환기의 A/μ-Law음성코딩방식과 같이 연동토록 지정되어 입력되는 PCM데이터에 대해 해당 음성코딩방식으로 전환하여 전송하는 A/μ-Law변환부로 구성됨을 특징으로 하는 국설교환기와 ISDN키폰시스템과의 코딩변환회로.
- ISDN키폰시스템(100)으로부터 회선종단장치(200)을 통하여 국설교환기(300)를 가지며, 상기 ISDN키폰시스템(100)로부터 통신망 종단장치(NTE) 또는 중간다중화장치(IMUX),1차군 다중화기 및 1차군 종단장치(PMUX,PNTE)를 가지는 시스템에 있어서,상기 ISDN단말 또는 비 ISDN단말이 접속되는 통신망 종단장치(NTE)로부터 송수신되는 PCM 데이타를 버퍼링하는 버퍼(101)와,상기 국설교환기(300)가 연결된 상기 회선종단장치(200)로 부터 ISDN아나로그 가입자를 위한 것으로 송수신되는 PCM 데이타를 가입자의 요구하는 타임슬롯에 따라 전송하토록 인터페이싱하는 PCM 인터페이스제어부(108)와,상기 버퍼(101)와 PCM 인터페이스제어부(108)와의 사이에서 상기 국설교환기(300)가 A-law음성코딩방식이면 A-law음성코딩방식으로, 상기 국설교환기(300)가 μ-law음성코딩방식이면 μ-law음성코딩방식으로 저정되어 입력되는 PCM 데이타에 대해 해당 음성코딩방식으로 변환하는 A/μ-Law변환부(102)와,상기 A/μ-Law 변환부(102)에 프레임 동기신호 및 기본 클럭신호를 제공하는 클럭구동회로(103)와,상기 A/μ-Law 변환부(102)와 연결되어 상기 국설교환기(300)의 A-law음성코딩방식 또는 μ-law음성코딩방식에 따라 적절하게 변환토록 지정하는 제어신호를 발생하고 상기 A/μ-Law 변환부(102)으로 입.출력되는 PCM데이타에 대해 A-law음성코딩방식 또는 μ-law음성코딩방식으로 변화시키도록 제어하는 CPU(104)로 구성됨을 특징으로 하는 국설교환기와 ISDN키폰시스템과의 코딩변환회로.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1998-0060820A KR100520161B1 (ko) | 1998-12-30 | 1998-12-30 | 국설교환기와isdn키폰시스템과의코딩변환회로 |
| US09/468,827 US6647023B1 (en) | 1998-12-30 | 1999-12-22 | Voice coding conversion circuit between office exchange and ISDN keyphone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1998-0060820A KR100520161B1 (ko) | 1998-12-30 | 1998-12-30 | 국설교환기와isdn키폰시스템과의코딩변환회로 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000044323A KR20000044323A (ko) | 2000-07-15 |
| KR100520161B1 true KR100520161B1 (ko) | 2005-11-24 |
Family
ID=19567578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-1998-0060820A Expired - Fee Related KR100520161B1 (ko) | 1998-12-30 | 1998-12-30 | 국설교환기와isdn키폰시스템과의코딩변환회로 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US6647023B1 (ko) |
| KR (1) | KR100520161B1 (ko) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070524A (en) * | 1989-10-30 | 1991-12-03 | Kabushiki Kaisha Toshiba | Telephone system |
| KR950022664A (ko) * | 1993-12-10 | 1995-07-28 | 백중영 | Isdn망에 접속 가능한 디지탈 키폰시스템 |
| US5495529A (en) * | 1992-11-26 | 1996-02-27 | Nec Corporation | Digital sound level control apparatus |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723356A (en) | 1980-07-02 | 1982-02-06 | Hitachi Ltd | Sound signal converter |
| IL74965A (en) | 1985-04-17 | 1990-07-12 | Israel Electronics Corp | Combination tasi and adpcm apparatus |
| IT1215464B (it) * | 1987-05-07 | 1990-02-14 | Sgs Microelettronica Spa | Circuito per la conversione pcm di un segnale analogico, con miglioramento del gain-tracking. |
| US5060227A (en) | 1988-02-29 | 1991-10-22 | Motorola, Inc. | Digital telephone switch with simultaneous dual PCM format compatibility |
| US4970723A (en) * | 1988-09-30 | 1990-11-13 | At&T Bell Laboratories | ISDN, basic rate interface arranged for quad voice |
| JP2744357B2 (ja) | 1991-04-23 | 1998-04-28 | キヤノン株式会社 | 構内交換装置 |
| US5239542A (en) | 1991-08-23 | 1993-08-24 | Redcom Laboratories, Inc. | Time division multiplex switching system for interconnecting telephone circuits which operate in accordance with different signalling systems and call formats |
| JPH07193619A (ja) | 1993-10-27 | 1995-07-28 | Canon Inc | デジタル電話機及びその動作方法 |
| ZA965340B (en) * | 1995-06-30 | 1997-01-27 | Interdigital Tech Corp | Code division multiple access (cdma) communication system |
| US6212228B1 (en) * | 1997-09-10 | 2001-04-03 | Nortel Networks Limited | Apparatus for modulation and demodulating digital data |
| US6233248B1 (en) * | 1997-10-14 | 2001-05-15 | Itt Manufacturing Enterprises, Inc. | User data protocol for internet data communications |
-
1998
- 1998-12-30 KR KR10-1998-0060820A patent/KR100520161B1/ko not_active Expired - Fee Related
-
1999
- 1999-12-22 US US09/468,827 patent/US6647023B1/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070524A (en) * | 1989-10-30 | 1991-12-03 | Kabushiki Kaisha Toshiba | Telephone system |
| US5495529A (en) * | 1992-11-26 | 1996-02-27 | Nec Corporation | Digital sound level control apparatus |
| KR950022664A (ko) * | 1993-12-10 | 1995-07-28 | 백중영 | Isdn망에 접속 가능한 디지탈 키폰시스템 |
Also Published As
| Publication number | Publication date |
|---|---|
| US6647023B1 (en) | 2003-11-11 |
| KR20000044323A (ko) | 2000-07-15 |
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