CA962775A - Digital differential pulse code modulation system - Google Patents
Digital differential pulse code modulation systemInfo
- Publication number
- CA962775A CA962775A CA113,178A CA113178A CA962775A CA 962775 A CA962775 A CA 962775A CA 113178 A CA113178 A CA 113178A CA 962775 A CA962775 A CA 962775A
- Authority
- CA
- Canada
- Prior art keywords
- modulation system
- pulse code
- code modulation
- differential pulse
- digital differential
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
-
- 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]
-
- 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)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Radio Relay Systems (AREA)
- Analogue/Digital Conversion (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA197,988A CA962789A (en) | 1970-05-20 | 1974-04-23 | Digital differential pulse code modulation system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3895170A | 1970-05-20 | 1970-05-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA962775A true CA962775A (en) | 1975-02-11 |
Family
ID=21902862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA113,178A Expired CA962775A (en) | 1970-05-20 | 1971-05-17 | Digital differential pulse code modulation system |
Country Status (7)
Country | Link |
---|---|
US (1) | US3707680A (ja) |
JP (1) | JPS56119354U (ja) |
CA (1) | CA962775A (ja) |
DE (1) | DE2124754C3 (ja) |
FR (1) | FR2090171B1 (ja) |
GB (1) | GB1327667A (ja) |
NL (1) | NL7106939A (ja) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1357165A (en) * | 1971-09-24 | 1974-06-19 | British Broadcasting Corp | Differential pulse-code modulation |
US3795763A (en) * | 1972-04-18 | 1974-03-05 | Communications Satellite Corp | Digital television transmission system |
JPS579267B2 (ja) * | 1972-07-27 | 1982-02-20 | ||
US4179586A (en) * | 1972-08-02 | 1979-12-18 | The United States Of America As Represented By The Secretary Of The Army | System of encoded speech transmission and reception |
US3916107A (en) * | 1972-10-06 | 1975-10-28 | Bell Telephone Labor Inc | Digital system for reclocking pulse code modulation circuits |
US3775747A (en) * | 1972-10-17 | 1973-11-27 | Int Standard Electric Corp | An error correcting encoder |
US3831167A (en) * | 1972-11-08 | 1974-08-20 | Bell Telephone Labor Inc | Digital-to-analog conversion using multiple decoders |
US3824590A (en) * | 1973-03-26 | 1974-07-16 | Bell Telephone Labor Inc | Adaptive interpolating video encoder |
US4039948A (en) * | 1974-06-19 | 1977-08-02 | Boxall Frank S | Multi-channel differential pulse code modulation system |
CA1068822A (en) * | 1974-06-24 | 1979-12-25 | Ching-Long Song | Digital to analog converter for a communication system |
IT1044736B (it) * | 1975-04-23 | 1980-04-21 | Cselt Centro Studi Lab Telecom | Sistema numerico per la trasmissione dei canali di due fasci modulati a impulsi codificati alla velocita di un solo fascio |
NL174611C (nl) * | 1975-06-12 | 1984-07-02 | Philips Nv | Differentieel pulscodemodulatie overdrachtstelsel. |
US4063038A (en) * | 1975-11-24 | 1977-12-13 | Digital Communications Corporation | Error coding communication terminal interface |
US4128832A (en) * | 1976-01-08 | 1978-12-05 | Ncr Corporation | Combined encoder/decoder |
US4314105A (en) * | 1977-01-21 | 1982-02-02 | Mozer Forrest Shrago | Delta modulation method and system for signal compression |
US4110563A (en) * | 1977-03-21 | 1978-08-29 | The Anaconda Company | Traffic sensitive modulation system |
FR2443769A2 (fr) * | 1978-12-08 | 1980-07-04 | Telediffusion Fse | Compression et expansion (quantification) de signaux numeriques de television a codage differentiel |
DE2941452C2 (de) * | 1979-10-12 | 1982-06-24 | Polygram Gmbh, 2000 Hamburg | Verfahren zur Codierung von Analogsignalen |
DE2941481C2 (de) * | 1979-10-12 | 1982-09-09 | Polygram Gmbh, 2000 Hamburg | Verfahren zur Frequenzbandbegrenzung eines Analogsignals |
US4499548A (en) * | 1980-07-02 | 1985-02-12 | Hewlett-Packard Company | Data compression apparatus |
US4481659A (en) * | 1982-02-11 | 1984-11-06 | Universite De Sherbrooke | Apparatus and method of reducing the bit rate of PCM speech |
FR2543380B1 (fr) * | 1983-03-24 | 1985-07-26 | Labo Cent Telecommunicat | Procede et dispositif de transcodage d'un signal numerique mic et application au codage analogique-numerique d'un signal analogique a large bande |
DE3524069A1 (de) * | 1985-07-05 | 1987-01-08 | Philips Patentverwaltung | Anordnung zum praediktiven codieren |
US4890283A (en) * | 1987-11-19 | 1989-12-26 | North American Philips Corporation | High definition television augmentation channel |
US5663763A (en) * | 1992-10-29 | 1997-09-02 | Sony Corp. | Picture signal encoding method and apparatus and picture signal decoding method and apparatus |
US5859602A (en) * | 1996-07-31 | 1999-01-12 | Victor Company Of Japan, Ltd. | Structures of data compression encoder, decoder, and record carrier |
JP4939824B2 (ja) * | 2006-03-15 | 2012-05-30 | 富士通株式会社 | アウトラインフォント圧縮方法及び復号方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3026375A (en) * | 1958-05-09 | 1962-03-20 | Bell Telephone Labor Inc | Transmission of quantized signals |
BE639822A (ja) * | 1962-11-13 | |||
US3339142A (en) * | 1963-07-01 | 1967-08-29 | Martin Marietta Corp | Adaptive pulse transmission system with modified delta modulation and redundant pulse elimination |
US3462686A (en) * | 1966-02-04 | 1969-08-19 | Westinghouse Electric Corp | Signal processing and reconstruction apparatus utilizing constant area quantization |
-
1970
- 1970-05-20 US US38951A patent/US3707680A/en not_active Expired - Lifetime
-
1971
- 1971-05-17 CA CA113,178A patent/CA962775A/en not_active Expired
- 1971-05-18 GB GB1545071*[A patent/GB1327667A/en not_active Expired
- 1971-05-19 DE DE2124754A patent/DE2124754C3/de not_active Expired
- 1971-05-19 NL NL7106939A patent/NL7106939A/xx not_active Application Discontinuation
- 1971-05-21 FR FR7118387A patent/FR2090171B1/fr not_active Expired
-
1980
- 1980-12-02 JP JP1980173166U patent/JPS56119354U/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2124754C3 (de) | 1981-03-26 |
FR2090171A1 (ja) | 1972-01-14 |
DE2124754B2 (de) | 1980-08-21 |
US3707680A (en) | 1972-12-26 |
DE2124754A1 (de) | 1971-12-02 |
FR2090171B1 (ja) | 1975-04-18 |
JPS56119354U (ja) | 1981-09-11 |
GB1327667A (en) | 1973-08-22 |
NL7106939A (ja) | 1971-11-23 |
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