NL7305371A - - Google Patents

Info

Publication number: NL7305371A
Authority: NL; Netherlands

Application number

NL7305371A

Other versions

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.)

1972-04-19

Filing date

1973-04-17

Publication date

1973-10-23

1973-04-17 Application filed filed Critical

1973-10-23 Publication of NL7305371A publication Critical patent/NL7305371A/xx

1988-02-16 Publication of NL183115B publication Critical patent/NL183115B/xx

1988-07-18 Application granted granted Critical

1988-07-18 Publication of NL183115C publication Critical patent/NL183115C/xx

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)
Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

NLAANVRAGE7305371,A 1972-04-19 1973-04-17 Inrichting voor het digitaal converteren van een digitaal signaal dat in een ingangscodeformaat is gecodeerd in een digitaal signaal dat in een uitgangscodeformaat is gecodeerd. NL183115C (nl)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US24555972A	1972-04-19	1972-04-19

Publications (3)

Publication Number	Publication Date
NL7305371A true NL7305371A (sv)	1973-10-23
NL183115B NL183115B (nl)	1988-02-16
NL183115C NL183115C (nl)	1988-07-18

Family

ID=22927152

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NLAANVRAGE7305371,A NL183115C (nl)	1972-04-19	1973-04-17	Inrichting voor het digitaal converteren van een digitaal signaal dat in een ingangscodeformaat is gecodeerd in een digitaal signaal dat in een uitgangscodeformaat is gecodeerd.

Country Status (10)

Country	Link
US (1)	US3772682A (sv)
JP (1)	JPS5639578B2 (sv)
BE (1)	BE798328A (sv)
CA (1)	CA969279A (sv)
DE (1)	DE2319650C3 (sv)
FR (1)	FR2180964B1 (sv)
GB (1)	GB1388232A (sv)
IT (1)	IT991561B (sv)
NL (1)	NL183115C (sv)
SE (2)	SE451522B (sv)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL7400764A (nl) *	1974-01-21	1975-07-23	Philips Nv	Digitale inrichting voor het omzetten van ge- comprimeerde delta gemoduleerde signalen in pcm-signalen.
US4206447A (en) *	1979-04-09	1980-06-03	Bell Telephone Laboratories, Incorporated	Adaptive quantizer apparatus for differential coding of nonuniform digital signals
JPS56146313A (en) *	1980-04-15	1981-11-13	Victor Co Of Japan Ltd	Compressing and expanding system of digital modulated wave
US4524447A (en) *	1983-05-25	1985-06-18	Rca Corporation	Digital signal processing apparatus having digital dither
DE69026143T2 (de) *	1989-06-07	1996-08-22	Canon Kk	Kodefehler korrigierende Vorhersage-Decodiervorrichtung
JP2754741B2 (ja) *	1989-06-09	1998-05-20	キヤノン株式会社	符号化装置
US5334977A (en) *	1991-03-08	1994-08-02	Nec Corporation	ADPCM transcoder wherein different bit numbers are used in code conversion
EP1071218B1 (en)	1999-07-19	2009-09-09	Texas Instruments Inc.	Differential unary coding for digital audio signals
US7453889B2 (en) *	2005-02-02	2008-11-18	Texas Instruments Incorporated	Interoperability of ADPCM encoded voice communications

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3339142A (en) *	1963-07-01	1967-08-29	Martin Marietta Corp	Adaptive pulse transmission system with modified delta modulation and redundant pulse elimination
FR1489885A (fr) *	1966-06-17	1967-07-28	Alcatel Sa	Procédé de réduction de la bande passante dans un système de transmission par modulation en delta
US3500441A (en) *	1967-10-12	1970-03-10	Bell Telephone Labor Inc	Delta modulation with discrete companding
US3526855A (en) *	1968-03-18	1970-09-01	Bell Telephone Labor Inc	Pulse code modulation and differential pulse code modulation encoders
US3594560A (en) *	1969-01-03	1971-07-20	Bell Telephone Labor Inc	Digital expandor circuit
US3707712A (en) *	1970-06-10	1972-12-26	Univ Sherbrooke	Converter from delta modulation to pulse code modulation

1972
- 1972-04-19 US US00245559A patent/US3772682A/en not_active Expired - Lifetime
- 1972-10-30 CA CA155,151A patent/CA969279A/en not_active Expired
1973
- 1973-04-05 SE SE7304816A patent/SE451522B/sv unknown
- 1973-04-16 IT IT68099/73A patent/IT991561B/it active
- 1973-04-17 NL NLAANVRAGE7305371,A patent/NL183115C/xx not_active IP Right Cessation
- 1973-04-17 BE BE130106A patent/BE798328A/xx not_active IP Right Cessation
- 1973-04-18 JP JP4326873A patent/JPS5639578B2/ja not_active Expired
- 1973-04-18 FR FR7314176A patent/FR2180964B1/fr not_active Expired
- 1973-04-18 DE DE2319650A patent/DE2319650C3/de not_active Expired
- 1973-04-18 GB GB1865173A patent/GB1388232A/en not_active Expired
1975
- 1975-11-06 SE SE7512465A patent/SE409633B/sv not_active IP Right Cessation

Also Published As

Publication number	Publication date
IT991561B (it)	1975-08-30
SE409633B (sv)	1979-08-27
JPS4921056A (sv)	1974-02-25
NL183115B (nl)	1988-02-16
DE2319650B2 (de)	1980-09-18
NL183115C (nl)	1988-07-18
SE451522B (sv)	1987-10-12
DE2319650A1 (de)	1973-10-25
JPS5639578B2 (sv)	1981-09-14
SE7512465L (sv)	1975-11-06
AU5450573A (en)	1974-10-17
CA969279A (en)	1975-06-10
DE2319650C3 (de)	1981-07-09
BE798328A (fr)	1973-08-16
GB1388232A (en)	1975-03-26
US3772682A (en)	1973-11-13
FR2180964A1 (sv)	1973-11-30
FR2180964B1 (sv)	1976-05-07

Publication	Publication Date	Title
AU1117276A (sv)	1976-04-29
JPS4921056A (sv)	1974-02-25
CH569238A5 (sv)	1975-11-14
CH560800A (sv)	1975-04-15
BG20968A1 (sv)	1976-01-20
CH1470373A4 (sv)	1975-06-30
CH1526973A4 (sv)	1975-08-15
CH16372A4 (sv)	1974-05-15
CH314673A4 (sv)	1974-11-15
CH555446A (sv)	1974-10-31
CH559120A5 (sv)	1975-02-28
CH570598A5 (sv)	1975-12-15
CH570462A5 (sv)	1975-12-15
CH560997A5 (sv)	1975-04-15
CH561463A5 (sv)	1975-04-30
CH562549A5 (sv)	1975-05-30
CH577534A5 (sv)	1976-07-15
CH563584A5 (sv)	1975-06-30
CH564995A5 (sv)	1975-08-15
CH566619A5 (sv)	1975-09-15
CH566676A5 (sv)	1975-09-15
CH567794A5 (sv)	1975-10-15
CH568538A5 (sv)	1975-10-31
CH584194A5 (sv)	1977-01-31
BG19853A1 (sv)	1975-10-30

Legal Events

Date	Code	Title
1980-02-25	BA	A request for search or an international-type search has been filed
1982-08-02	BB	A search report has been drawn up
1983-01-03	BC	A request for examination has been filed
1985-01-01	A85	Still pending on 85-01-01
1993-05-17	V4	Discontinued because of reaching the maximum lifetime of a patent