SE7508438L - Telekommunikationssystem - Google Patents
TelekommunikationssystemInfo
- Publication number
- SE7508438L SE7508438L SE7508438A SE7508438A SE7508438L SE 7508438 L SE7508438 L SE 7508438L SE 7508438 A SE7508438 A SE 7508438A SE 7508438 A SE7508438 A SE 7508438A SE 7508438 L SE7508438 L SE 7508438L
- Authority
- SE
- Sweden
- Prior art keywords
- decrease
- increase
- signals
- linear
- conversion
- Prior art date
Links
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
- H03M7/3048—Conversion to or from one-bit differential modulation only, e.g. delta modulation [DM]
- H03M7/3051—Conversion to or from one-bit differential modulation only, e.g. delta modulation [DM] adaptive, e.g. adaptive delta modulation [ADM]
-
- 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
- H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
- H04B14/062—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM]
- H04B14/064—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM] with adaptive feedback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/491,767 US3937897A (en) | 1974-07-25 | 1974-07-25 | Signal coding for telephone communication system |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7508438L true SE7508438L (sv) | 1976-02-26 |
SE402195B SE402195B (sv) | 1978-06-19 |
Family
ID=23953583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7508438A SE402195B (sv) | 1974-07-25 | 1975-07-24 | Telefonforbindelseanleggning vid vilken talsignaler overfores enligt anpassad deltamodulationskod |
Country Status (7)
Country | Link |
---|---|
US (1) | US3937897A (sv) |
AU (1) | AU8338475A (sv) |
CA (1) | CA1065069A (sv) |
FR (1) | FR2280261A1 (sv) |
GB (1) | GB1506262A (sv) |
IT (1) | IT1041013B (sv) |
SE (1) | SE402195B (sv) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4128832A (en) * | 1976-01-08 | 1978-12-05 | Ncr Corporation | Combined encoder/decoder |
FR2345019A1 (fr) * | 1976-03-19 | 1977-10-14 | Cit Alcatel | Dispositif de transmission de donnees et application a la transmission de signaux analogiques et de donnees dans un reseau avec modulation delta |
FR2399763A1 (fr) * | 1977-08-03 | 1979-03-02 | Trt Telecom Radio Electr | Dispositif numerique pour diviser la frequence d'echantillonnage dans un signal code au moyen de la modulation delta |
US4208740A (en) * | 1978-12-20 | 1980-06-17 | International Business Machines Corporation | Adaptive delta modulation system |
US4206447A (en) * | 1979-04-09 | 1980-06-03 | Bell Telephone Laboratories, Incorporated | Adaptive quantizer apparatus for differential coding of nonuniform digital signals |
DE2916576C3 (de) * | 1979-04-24 | 1981-12-10 | Siemens AG, 1000 Berlin und 8000 München | Digital-Fernmeldesystem für Zweidraht-Getrenntlage-Betrieb |
US4271332A (en) * | 1979-06-04 | 1981-06-02 | Anderson James C | Speech signal A/D converter using an instantaneously-variable bandwidth filter |
US4528551A (en) * | 1979-11-28 | 1985-07-09 | International Telephone And Telegraph Corporation | Digital to analog converter employing sigma-delta modulation for use in telephone systems |
US4554633A (en) * | 1982-09-30 | 1985-11-19 | General Electric Company | Sampled data CT system including analog filter and compensating digital filter |
US4518950A (en) * | 1982-10-22 | 1985-05-21 | At&T Bell Laboratories | Digital code converter |
BE897773A (nl) * | 1983-09-19 | 1984-03-19 | Bell Telephone Mfg Cy | Pulse code modulatie omzetter |
CA1271995A (en) * | 1984-07-05 | 1990-07-24 | Nec Corporation | Method and apparatus for converting an analog signal to a digital signal using an oversampling technique |
GB2172159A (en) * | 1985-03-07 | 1986-09-10 | Stc Plc | A/d converters |
GB2178577B (en) * | 1985-07-27 | 1989-01-11 | Plessey Co Plc | A signal converter |
JPS6354827A (ja) * | 1986-08-26 | 1988-03-09 | Sony Corp | 差分pcm信号形成回路 |
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. |
JPH0787376B2 (ja) * | 1987-07-24 | 1995-09-20 | シャープ株式会社 | デルタ変調符号の復号装置 |
US5022052A (en) * | 1987-11-13 | 1991-06-04 | Seismograph Service Corp. | Analog signal binary transmission system using slope detection |
JPH08256060A (ja) * | 1995-03-17 | 1996-10-01 | Nec Corp | 比較型a/d変換器 |
GB9509831D0 (en) * | 1995-05-15 | 1995-07-05 | Gerzon Michael A | Lossless coding method for waveform data |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL277910A (sv) * | 1961-05-02 | |||
US3638219A (en) * | 1969-05-23 | 1972-01-25 | Bell Telephone Labor Inc | Pcm coder |
US3633170A (en) * | 1970-06-09 | 1972-01-04 | Ibm | Digital filter and threshold circuit |
US3707712A (en) * | 1970-06-10 | 1972-12-26 | Univ Sherbrooke | Converter from delta modulation to pulse code modulation |
FR2115686A5 (sv) * | 1970-11-30 | 1972-07-07 | Labo Cent Telecommunicat | |
US3652957A (en) * | 1970-12-16 | 1972-03-28 | Bell Telephone Labor Inc | Adaptive delta modulator |
US3831092A (en) * | 1971-04-13 | 1974-08-20 | Philips Corp | Transmitter for the transmission of signals by pulse code modulation |
-
1974
- 1974-07-25 US US05/491,767 patent/US3937897A/en not_active Expired - Lifetime
-
1975
- 1975-07-17 CA CA231,671A patent/CA1065069A/en not_active Expired
- 1975-07-22 GB GB30650/75A patent/GB1506262A/en not_active Expired
- 1975-07-24 FR FR7523217A patent/FR2280261A1/fr active Granted
- 1975-07-24 SE SE7508438A patent/SE402195B/sv not_active IP Right Cessation
- 1975-07-24 IT IT50645/75A patent/IT1041013B/it active
- 1975-07-25 AU AU83384/75A patent/AU8338475A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT1041013B (it) | 1980-01-10 |
SE402195B (sv) | 1978-06-19 |
CA1065069A (en) | 1979-10-23 |
FR2280261B3 (sv) | 1979-04-27 |
GB1506262A (en) | 1978-04-05 |
US3937897A (en) | 1976-02-10 |
FR2280261A1 (fr) | 1976-02-20 |
AU8338475A (en) | 1977-01-27 |
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Legal Events
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---|---|---|---|
NUG | Patent has lapsed |
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