DK142599B - Transmissionsanlæg til ved impulskodemodulation at overføre analogsignaler. - Google Patents
Transmissionsanlæg til ved impulskodemodulation at overføre analogsignaler. Download PDFInfo
- Publication number
- DK142599B DK142599B DK51573AA DK51573A DK142599B DK 142599 B DK142599 B DK 142599B DK 51573A A DK51573A A DK 51573AA DK 51573 A DK51573 A DK 51573A DK 142599 B DK142599 B DK 142599B
- Authority
- DK
- Denmark
- Prior art keywords
- analog
- amplitude
- frequency
- digital converter
- compressor
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
-
- 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
- H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
- H04B14/046—Systems or methods for reducing noise or bandwidth
- H04B14/048—Non linear compression or expansion
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Transmitters (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Analogue/Digital Conversion (AREA)
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH141572A CH542552A (de) | 1972-02-01 | 1972-02-01 | Einrichtung mit einer Sende- und einer Empfangsstation zum Erzeugen, Umformen und Übertragen von Signalen |
| CH141572 | 1972-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK142599B true DK142599B (da) | 1980-11-24 |
| DK142599C DK142599C (ru) | 1981-07-27 |
Family
ID=4209908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK51573AA DK142599B (da) | 1972-02-01 | 1973-01-31 | Transmissionsanlæg til ved impulskodemodulation at overføre analogsignaler. |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4151469A (ru) |
| JP (1) | JPS48104409A (ru) |
| AT (1) | AT352780B (ru) |
| BE (1) | BE794774A (ru) |
| CA (1) | CA987787A (ru) |
| CH (1) | CH542552A (ru) |
| DE (1) | DE2302360A1 (ru) |
| DK (1) | DK142599B (ru) |
| FR (1) | FR2170105B1 (ru) |
| GB (1) | GB1386923A (ru) |
| IT (1) | IT973069B (ru) |
| NL (1) | NL7301217A (ru) |
| NO (1) | NO140871C (ru) |
| SE (1) | SE376704B (ru) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6019196B2 (ja) * | 1979-12-20 | 1985-05-15 | 松下電器産業株式会社 | マイクロフォン装置 |
| JPS5689195A (en) * | 1979-12-20 | 1981-07-20 | Sony Corp | Microphone device |
| JPS58117741A (ja) * | 1981-12-30 | 1983-07-13 | Sony Corp | 信号処理回路 |
| JPS59149431A (ja) * | 1983-02-16 | 1984-08-27 | Nec Corp | 圧縮器 |
| JPS60101769A (ja) * | 1983-11-09 | 1985-06-05 | Hitachi Ltd | 信号伝送装置 |
| GB2160394B (en) * | 1984-05-02 | 1988-03-16 | Pioneer Electronic Corp | Noise reduction system |
| US5689692A (en) * | 1992-12-23 | 1997-11-18 | Honeywell Inc. | Method and apparatus for decoding an encoded NRZ signal |
| WO1995031049A1 (en) * | 1994-05-09 | 1995-11-16 | Linkplus Corporation | Companding system (lincompex) using pre- and de-emphasis |
| US6405164B1 (en) | 1999-12-30 | 2002-06-11 | Engineering Consortium, Inc. | Audio compression circuit and method |
| US6445233B1 (en) | 1999-12-30 | 2002-09-03 | The Engineering Consortium, Inc. | Multiple time constant rectifier apparatus and method |
| WO2003063160A1 (en) * | 2002-01-25 | 2003-07-31 | Koninklijke Philips Electronics N.V. | Method and unit for substracting quantization noise from a pcm signal |
| DE102004036154B3 (de) * | 2004-07-26 | 2005-12-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur robusten Klassifizierung von Audiosignalen sowie Verfahren zu Einrichtung und Betrieb einer Audiosignal-Datenbank sowie Computer-Programm |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071826A (en) * | 1961-04-27 | 1978-01-31 | The United States Of America As Represented By The Secretary Of The Navy | Clipped speech channel coded communication system |
| NL6712082A (ru) * | 1967-09-02 | 1969-03-04 | ||
| DE1762775C3 (de) * | 1967-09-02 | 1979-10-18 | N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) | System zur Übertragung analoger Signale mittels Pulscodemodulation |
-
1972
- 1972-02-01 CH CH141572A patent/CH542552A/de not_active IP Right Cessation
- 1972-12-20 AT AT1091072A patent/AT352780B/de active
- 1972-12-28 IT IT33762/72A patent/IT973069B/it active
-
1973
- 1973-01-18 DE DE2302360A patent/DE2302360A1/de not_active Ceased
- 1973-01-29 NL NL7301217A patent/NL7301217A/xx not_active Application Discontinuation
- 1973-01-30 SE SE7301295A patent/SE376704B/xx unknown
- 1973-01-31 FR FR7303454A patent/FR2170105B1/fr not_active Expired
- 1973-01-31 BE BE794774A patent/BE794774A/xx unknown
- 1973-01-31 DK DK51573AA patent/DK142599B/da unknown
- 1973-01-31 CA CA162,461A patent/CA987787A/en not_active Expired
- 1973-01-31 NO NO406/73A patent/NO140871C/no unknown
- 1973-01-31 GB GB490773A patent/GB1386923A/en not_active Expired
- 1973-02-01 JP JP48012467A patent/JPS48104409A/ja active Pending
-
1977
- 1977-09-19 US US05/834,707 patent/US4151469A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| SE376704B (ru) | 1975-06-02 |
| NL7301217A (ru) | 1973-08-03 |
| CA987787A (en) | 1976-04-20 |
| IT973069B (it) | 1974-06-10 |
| NO140871C (no) | 1979-11-28 |
| AT352780B (de) | 1979-10-10 |
| BE794774A (fr) | 1973-05-16 |
| FR2170105B1 (ru) | 1980-03-28 |
| NO140871B (no) | 1979-08-20 |
| ATA1091072A (de) | 1979-03-15 |
| US4151469A (en) | 1979-04-24 |
| DE2302360A1 (de) | 1973-08-09 |
| FR2170105A1 (ru) | 1973-09-14 |
| GB1386923A (en) | 1975-03-12 |
| JPS48104409A (ru) | 1973-12-27 |
| CH542552A (de) | 1973-09-30 |
| DK142599C (ru) | 1981-07-27 |
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