IT1170279B - Convertitore di codice digitale particolarmente per prevenire l'accumulo di distorsione in un canale di comunicazioni - Google Patents

Convertitore di codice digitale particolarmente per prevenire l'accumulo di distorsione in un canale di comunicazioni

Info

Publication number: IT1170279B
Authority: IT; Italy
Prior art keywords: communication channel; digital code; code converter; prevent distortion; converter particularly
Prior art date: 1982-12-27

Application number

IT24377/83A

Other languages

English (en)

Other versions

IT8324377A0 (it

Inventor

Raymond Stephen Medaugh

Original Assignee

Western Electric Co

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.)

1982-12-27

Filing date

1983-12-23

Publication date

1987-06-03

1983-12-23 Application filed by Western Electric Co filed Critical Western Electric Co

1983-12-23 Publication of IT8324377A0 publication Critical patent/IT8324377A0/it

1987-06-03 Application granted granted Critical

1987-06-03 Publication of IT1170279B publication Critical patent/IT1170279B/it

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
- H03M7/3002—Conversion to or from differential modulation
- H03M7/3044—Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM]
- H03M7/3046—Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM] adaptive, e.g. adaptive differential pulse code modulation [ADPCM]

Landscapes

Engineering & Computer Science (AREA)
Theoretical Computer Science (AREA)
Compression, Expansion, Code Conversion, And Decoders (AREA)
Analogue/Digital Conversion (AREA)
Transmission And Conversion Of Sensor Element Output (AREA)

IT24377/83A 1982-12-27 1983-12-23 Convertitore di codice digitale particolarmente per prevenire l'accumulo di distorsione in un canale di comunicazioni IT1170279B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US06/453,502 US4475213A (en)	1982-12-27	1982-12-27	Digital code converter

Publications (2)

Publication Number	Publication Date
IT8324377A0 IT8324377A0 (it)	1983-12-23
IT1170279B true IT1170279B (it)	1987-06-03

Family

ID=23800811

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT24377/83A IT1170279B (it)	1982-12-27	1983-12-23	Convertitore di codice digitale particolarmente per prevenire l'accumulo di distorsione in un canale di comunicazioni

Country Status (8)

Country	Link
US (1)	US4475213A (it)
EP (1)	EP0131005B1 (it)
JP (1)	JPS60500194A (it)
AU (1)	AU561478B2 (it)
CA (1)	CA1223964A (it)
DE (1)	DE3376516D1 (it)
IT (1)	IT1170279B (it)
WO (1)	WO1984002623A1 (it)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS59103423A (ja) *	1982-12-06	1984-06-14	Nippon Telegr & Teleph Corp <Ntt>	Ａｄｐｃｍ−ｐｃｍ変換装置
US4571736A (en) *	1983-10-31	1986-02-18	University Of Southwestern Louisiana	Digital communication system employing differential coding and sample robbing
US4536741A (en) *	1983-11-16	1985-08-20	At&T Bell Laboratories	Digital quantizer
US4549304A (en) *	1983-11-28	1985-10-22	Northern Telecom Limited	ADPCM Encoder/decoder with signalling bit insertion
US4719642A (en) *	1985-02-27	1988-01-12	Scientific Atlanta, Inc.	Error detection and concealment using predicted signal values
US4726019A (en) *	1986-02-28	1988-02-16	American Telephone And Telegraph Company, At&T Bell Laboratories	Digital encoder and decoder synchronization in the presence of late arriving packets
US4748620A (en) *	1986-02-28	1988-05-31	American Telephone And Telegraph Company, At&T Bell Laboratories	Time stamp and packet virtual sequence numbering for reconstructing information signals from packets
US4920534A (en) *	1986-02-28	1990-04-24	At&T Bell Laboratories	System for controllably eliminating bits from packet information field based on indicator in header and amount of data in packet buffer
US4703477A (en) *	1986-02-28	1987-10-27	American Telephone And Telegraph Company At&T Bell Laboratories	Packet information field data format
US4894823A (en) *	1986-02-28	1990-01-16	American Telephone And Telegraph Company	Time stamping for packet system nodes
US4774496A (en) *	1986-02-28	1988-09-27	American Telephone And Telegraph Company, At&T Bell Laboratories	Digital encoder and decoder synchronization in the presence of data dropouts
IL80103A0 (en) *	1986-09-21	1987-01-30	Eci Telecom Limited	Adaptive differential pulse code modulation(adpcm)system
US5334977A (en) *	1991-03-08	1994-08-02	Nec Corporation	ADPCM transcoder wherein different bit numbers are used in code conversion
US5227878A (en) *	1991-11-15	1993-07-13	At&T Bell Laboratories	Adaptive coding and decoding of frames and fields of video
US6870886B2 (en) *	1993-12-15	2005-03-22	Koninklijke Philips Electronics N.V.	Method and apparatus for transcoding a digitally compressed high definition television bitstream to a standard definition television bitstream
US6167085A (en) *	1997-07-31	2000-12-26	Sony Corporation	Image data compression
CN1622470B (zh) *	2004-12-24	2010-04-21	北京中星微电子有限公司	一种自适应差分脉冲编码调制解码装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS6016777B2 (ja) *	1976-12-25	1985-04-27	株式会社東芝	信号伝送方式
US4363024A (en) *	1977-11-21	1982-12-07	Brokaw Adrian P	Digital-to-analog converter providing multiplicative and linear functions
JPS6058614B2 (ja) *	1978-03-11	1985-12-20	日本電信電話株式会社	Ｄｐｃｍ−ｐｃｍ変換装置
CH640379A5 (de) *	1978-12-01	1983-12-30	Bbc Brown Boveri & Cie	Verfahren und einrichtung zur signaluebertragung.
US4323885A (en) *	1980-09-29	1982-04-06	Bell Telephone Laboratories, Incorporated	Noise and crosstalk reduction in mid-riser biased encoders
US4384278A (en) *	1981-07-22	1983-05-17	Bell Telephone Laboratories, Incorporated	One-bit codec with slope overload correction
JPS59103423A (ja) *	1982-12-06	1984-06-14	Nippon Telegr & Teleph Corp <Ntt>	Ａｄｐｃｍ−ｐｃｍ変換装置

1982
- 1982-12-27 US US06/453,502 patent/US4475213A/en not_active Expired - Lifetime
1983
- 1983-11-21 DE DE8484900188T patent/DE3376516D1/de not_active Expired
- 1983-11-21 WO PCT/US1983/001832 patent/WO1984002623A1/en not_active Ceased
- 1983-11-21 AU AU23384/84A patent/AU561478B2/en not_active Ceased
- 1983-11-21 EP EP84900188A patent/EP0131005B1/en not_active Expired
- 1983-11-21 JP JP59500159A patent/JPS60500194A/ja active Pending
- 1983-11-28 CA CA000442048A patent/CA1223964A/en not_active Expired
- 1983-12-23 IT IT24377/83A patent/IT1170279B/it active

Also Published As

Publication number	Publication date
EP0131005A1 (en)	1985-01-16
AU2338484A (en)	1984-07-17
EP0131005A4 (en)	1985-07-30
WO1984002623A1 (en)	1984-07-05
AU561478B2 (en)	1987-05-07
EP0131005B1 (en)	1988-05-04
JPS60500194A (ja)	1985-02-07
IT8324377A0 (it)	1983-12-23
US4475213A (en)	1984-10-02
CA1223964A (en)	1987-07-07
DE3376516D1 (en)	1988-06-09

Publication	Publication Date	Title
IT1170279B (it)	1987-06-03	Convertitore di codice digitale particolarmente per prevenire l'accumulo di distorsione in un canale di comunicazioni
DK178987A (da)	1988-02-08	Abonnentenhed til et traadloest digitaltelefonsystem
GB2134749B (en)	1985-09-25	Telephone call cost calculator
SE0402229L (sv)	2004-09-16	Digitalt telefonsystem
IT1137066B (it)	1986-09-03	Convertitore di codice da digitale a digitale
ES510395A0 (es)	1983-02-01	"un filtro digital".
GB2137458B (en)	1986-11-19	Digital handsfree telephone
FR2516322B1 (fr)	1987-10-23	Filtres numeriques a
GB2117606B (en)	1986-01-15	Telephone modem
ES522479A0 (es)	1984-04-16	Perfeccionamientos introducidos en un convertidor instantaneo de analogico en digital
DK307685A (da)	1986-01-06	Digitalt telefonapparat
IT1168885B (it)	1987-05-20	Centralino telefonico in diramazione automatico digitale modulato in codice ad impulsi
ES536914A0 (es)	1986-01-01	Una estacion de abonado telefonico
ZA822162B (en)	1983-06-29	Digital telecommunication system
GB8314639D0 (en)	1983-06-29	Digital converters
FI821550A0 (fi)	1982-05-03	Digital multiplexanordning
IT8324419A0 (it)	1983-12-28	Attivazione di una connessione digitale di abbonato.
IT1127993B (it)	1986-05-28	Suoneria telefonica di tipo digitale
ES511016A0 (es)	1983-04-16	"un convertidor analogico a digital paralelo".
DK512583A (da)	1984-05-13	Abonnentkreds til et telefonnet
FI831519L (fi)	1983-11-07	Styrsats foer digital pulsvaexelriktare
KR840000522Y1 (en)	1984-03-28	A telephone
GB2126530B (en)	1986-01-08	A telephone index
DE3369819D1 (en)	1987-03-19	Generalized modular digital telephone exchange
CA49548S (en)	1982-04-13	Telephone index