BE489677A - - Google Patents
Info
- Publication number
- BE489677A BE489677A BE489677DA BE489677A BE 489677 A BE489677 A BE 489677A BE 489677D A BE489677D A BE 489677DA BE 489677 A BE489677 A BE 489677A
- Authority
- BE
- Belgium
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34098A US2621251A (en) | 1948-06-19 | 1948-06-19 | High-frequency preemphasis for pulse code modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE489677A true BE489677A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=21874295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE489677D BE489677A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1948-06-19 |
Country Status (6)
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2857513A (en) * | 1953-07-21 | 1958-10-21 | Bell Telephone Labor Inc | Signal generator for testing telephotograph circuits |
| GB1047366A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1964-07-22 | |||
| BE754708A (fr) * | 1969-08-29 | 1971-01-18 | Thomson Csf | Perfectionnements aux dispositifs de transmission digitalisee de signaux de type telephonique |
| US4700361A (en) * | 1983-10-07 | 1987-10-13 | Dolby Laboratories Licensing Corporation | Spectral emphasis and de-emphasis |
| US4758805A (en) * | 1983-10-28 | 1988-07-19 | Nippondenso Co., Ltd. | High frequency interference prevention filter for electric instruments |
| DE3580070D1 (de) * | 1984-07-16 | 1990-11-15 | Nippon Denso Co | Hf-filter fuer elektronische instrumente. |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1743132A (en) * | 1928-01-28 | 1930-01-14 | American Telephone & Telegraph | Equalization of carrier systems |
| GB497111A (en) * | 1936-11-27 | 1938-12-13 | Marconi Wireless Telegraph Co | Improvements in or relating to frequency modulated carrier wave systems |
| US2212338A (en) * | 1938-04-28 | 1940-08-20 | Bell Telephone Labor Inc | Frequency modulation |
| USRE21660E (en) * | 1940-02-19 | 1940-12-17 | Frequency modulation signaling | |
| US2362000A (en) * | 1941-12-20 | 1944-11-07 | Rca Corp | Reception of frequency modulated waves |
| US2392546A (en) * | 1942-02-20 | 1946-01-08 | Rca Corp | Pulse modulation receiver |
| US2397157A (en) * | 1943-02-12 | 1946-03-26 | Rca Corp | Wave length modulation system |
-
0
- NL NL686800710A patent/NL147080B/xx unknown
- BE BE489677D patent/BE489677A/xx unknown
-
1948
- 1948-06-19 US US34098A patent/US2621251A/en not_active Expired - Lifetime
-
1949
- 1949-06-17 FR FR988765D patent/FR988765A/fr not_active Expired
- 1949-06-18 CH CH285638D patent/CH285638A/fr unknown
- 1949-12-16 GB GB32297/49A patent/GB661554A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2621251A (en) | 1952-12-09 |
| CH285638A (fr) | 1952-09-15 |
| NL147080B (nl) | |
| GB661554A (en) | 1951-11-21 |
| FR988765A (fr) | 1951-08-31 |