IT1032815B - Modulatore delta a compressione espansione sillabica per telefonia - Google Patents
Modulatore delta a compressione espansione sillabica per telefoniaInfo
- Publication number
- IT1032815B IT1032815B IT68143/75A IT6814375A IT1032815B IT 1032815 B IT1032815 B IT 1032815B IT 68143/75 A IT68143/75 A IT 68143/75A IT 6814375 A IT6814375 A IT 6814375A IT 1032815 B IT1032815 B IT 1032815B
- Authority
- IT
- Italy
- Prior art keywords
- syllabic
- telephony
- expansion
- delta compression
- compression modulator
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/02—Delta modulation, i.e. one-bit differential modulation
- H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]
- H03M3/024—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM] using syllabic companding, e.g. continuously variable slope delta modulation [CVSD]
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Analogue/Digital Conversion (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US468449A US3899754A (en) | 1974-05-09 | 1974-05-09 | Delta modulation and demodulation with syllabic companding |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1032815B true IT1032815B (it) | 1979-06-20 |
Family
ID=23859860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT68143/75A IT1032815B (it) | 1974-05-09 | 1975-05-05 | Modulatore delta a compressione espansione sillabica per telefonia |
Country Status (10)
Country | Link |
---|---|
US (1) | US3899754A (it) |
JP (1) | JPS6013339B2 (it) |
BE (1) | BE828719A (it) |
CA (1) | CA1031075A (it) |
DE (1) | DE2520189C2 (it) |
FR (1) | FR2270723B1 (it) |
GB (1) | GB1502999A (it) |
IT (1) | IT1032815B (it) |
NL (1) | NL7505406A (it) |
SE (1) | SE401303B (it) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3956700A (en) * | 1975-04-18 | 1976-05-11 | Bell Telephone Laboratories, Incorporated | Two-feedback-path delta modulation system with circuits for reducing pulse width modulation |
NL7506986A (nl) * | 1975-06-12 | 1976-12-14 | Philips Nv | Deltamodulatie-codeerinrichting. |
US4025852A (en) * | 1975-10-14 | 1977-05-24 | Bell Telephone Laboratories, Incorporated | Method and arrangement for controlling delta modulator idle-channel noise |
US4048551A (en) * | 1975-12-05 | 1977-09-13 | Bell Telephone Laboratories, Incorporated | Battery charging circuit |
US4048448A (en) * | 1976-02-19 | 1977-09-13 | Bell Telephone Laboratories, Incorporated | Multiparty telephone ringing |
US4208740A (en) * | 1978-12-20 | 1980-06-17 | International Business Machines Corporation | Adaptive delta modulation system |
US4406010A (en) * | 1980-12-30 | 1983-09-20 | Motorola, Inc. | Receiver for CVSD modulation with integral filtering |
US4700362A (en) * | 1983-10-07 | 1987-10-13 | Dolby Laboratories Licensing Corporation | A-D encoder and D-A decoder system |
US4646322A (en) * | 1983-12-19 | 1987-02-24 | Telex Computer Products, Inc. | Adaptive delta modulation codec |
US4583237A (en) * | 1984-05-07 | 1986-04-15 | At&T Bell Laboratories | Technique for synchronous near-instantaneous coding |
US4926178A (en) * | 1988-07-13 | 1990-05-15 | Analog Devices, Inc. | Delta modulator with integrator having positive feedback |
US5471498A (en) * | 1993-04-15 | 1995-11-28 | National Semiconductor Corporation | High-speed low-voltage differential swing transmission line transceiver |
US5483184A (en) * | 1993-06-08 | 1996-01-09 | National Semiconductor Corporation | Programmable CMOS bus and transmission line receiver |
US5543746A (en) * | 1993-06-08 | 1996-08-06 | National Semiconductor Corp. | Programmable CMOS current source having positive temperature coefficient |
KR100302890B1 (ko) * | 1993-06-08 | 2001-11-22 | 클라크 3세 존 엠. | 프로그램가능한cmos버스및전송라인드라이버 |
US5818260A (en) * | 1996-04-24 | 1998-10-06 | National Semiconductor Corporation | Transmission line driver having controllable rise and fall times with variable output low and minimal on/off delay |
US6014093A (en) * | 1998-02-27 | 2000-01-11 | Hayes; Adam T. | Pulse coding system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3582784A (en) * | 1968-10-18 | 1971-06-01 | Bell Telephone Labor Inc | Delta modulation system |
DE1951055C3 (de) * | 1969-10-10 | 1981-10-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Schaltungsanordnung für die periodische Übertragung von Nachrichtensignalen mittels eines Impuls-Deltamodulator |
US3624558A (en) * | 1970-01-16 | 1971-11-30 | Bell Telephone Labor Inc | Delta modulation encoder having double integration |
US3815033A (en) * | 1970-12-02 | 1974-06-04 | Bell Telephone Labor Inc | Discrete adaptive delta modulation system |
US3716803A (en) * | 1971-12-27 | 1973-02-13 | Bell Telephone Labor Inc | Stabilized delta modulator |
DE2212668C3 (de) * | 1972-03-16 | 1975-02-13 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Schaltungsanordnung für die Übertragung von Nachrichtensignalen mittels I mpuls- Deltamodulation |
US3806806A (en) * | 1972-11-20 | 1974-04-23 | Bell Telephone Labor Inc | Adaptive data modulator |
-
1974
- 1974-05-09 US US468449A patent/US3899754A/en not_active Expired - Lifetime
- 1974-12-27 CA CA216,966A patent/CA1031075A/en not_active Expired
-
1975
- 1975-04-29 SE SE7505012A patent/SE401303B/xx not_active IP Right Cessation
- 1975-05-05 BE BE156047A patent/BE828719A/xx not_active IP Right Cessation
- 1975-05-05 IT IT68143/75A patent/IT1032815B/it active
- 1975-05-06 JP JP50054165A patent/JPS6013339B2/ja not_active Expired
- 1975-05-06 DE DE2520189A patent/DE2520189C2/de not_active Expired
- 1975-05-07 GB GB19277/75A patent/GB1502999A/en not_active Expired
- 1975-05-07 NL NL7505406A patent/NL7505406A/xx not_active Application Discontinuation
- 1975-05-07 FR FR7514382A patent/FR2270723B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2520189C2 (de) | 1983-01-13 |
FR2270723A1 (it) | 1975-12-05 |
JPS50153860A (it) | 1975-12-11 |
NL7505406A (nl) | 1975-11-11 |
AU8085975A (en) | 1976-11-11 |
BE828719A (fr) | 1975-09-01 |
US3899754A (en) | 1975-08-12 |
DE2520189A1 (de) | 1975-11-27 |
CA1031075A (en) | 1978-05-09 |
JPS6013339B2 (ja) | 1985-04-06 |
GB1502999A (en) | 1978-03-08 |
SE401303B (sv) | 1978-04-24 |
FR2270723B1 (it) | 1977-12-09 |
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