GB622255A - Improvements in or relating to devices for stereophonic transmission by electric means - Google Patents
Improvements in or relating to devices for stereophonic transmission by electric meansInfo
- Publication number
- GB622255A GB622255A GB33864/46A GB3386446A GB622255A GB 622255 A GB622255 A GB 622255A GB 33864/46 A GB33864/46 A GB 33864/46A GB 3386446 A GB3386446 A GB 3386446A GB 622255 A GB622255 A GB 622255A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carrier wave
- suppressed
- transmission
- stereophonic
- lower sideband
- 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
- 230000005540 biological transmission Effects 0.000 title abstract 3
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/88—Stereophonic broadcast systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
622,255. Stereophonic transmission. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Nov. 14, 1946, No. 33864. Convention date, April 21, 1943. [Class 40 (iv)] One of two stereophonic signals using a common channel has its highest and lowest frequencies suppressed and is transmitted as the lower sideband of an auxiliary carrier wave. As shown, if the frequencies above 5000 and below 300 c/s. are suppressed and the resulting signal transmitted as the lower sideband on a carrier wave of 25,000 c/s., the channel necessary for the transmission of one signal a and the curtailed signal b is reduced to a width of 25,000 c/s., the upper sideband b<SP>1</SP> being also suppressed. The selective requirement of the filter to remove the carrier wave is not severe because of the gap of 300 c/s. between the highest frequency of the lower sideband and the frequency of the carrier wave. The reproduction of the signals on two loud-speakers is described with reference to a circuit (Fig. 2, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL245731X | 1943-04-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB622255A true GB622255A (en) | 1949-04-28 |
Family
ID=19780824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33864/46A Expired GB622255A (en) | 1943-04-21 | 1946-11-14 | Improvements in or relating to devices for stereophonic transmission by electric means |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2515619A (en) |
| BE (1) | BE455396A (en) |
| CH (1) | CH245731A (en) |
| FR (1) | FR903556A (en) |
| GB (1) | GB622255A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA594467A (en) * | 1954-06-22 | 1960-03-15 | L. Halvorson Robert | Radio communication system |
| US2961615A (en) * | 1959-08-18 | 1960-11-22 | Rca Corp | High-level modulated signal amplifier system |
| US3257512A (en) * | 1960-04-18 | 1966-06-21 | Zenith Radio Corp | Stereo fm transmission system |
| NL267354A (en) * | 1960-07-22 | |||
| US3152224A (en) * | 1962-08-01 | 1964-10-06 | Zenith Radio Corp | F. m. stereophonic multiplex receiver having a single volume control for adjusting the magnitude of the signals presented to the stereo detector and the output materixing means |
| US4074084A (en) * | 1975-11-05 | 1978-02-14 | Berg Johannes C M Van Den | Method and apparatus for receiving sound intended for stereophonic reproduction |
| US6658115B1 (en) * | 1999-11-16 | 2003-12-02 | Radioshack, Corp. | Method and apparatus for high fidelity wireless stereophonic transmission |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1717064A (en) * | 1925-10-20 | 1929-06-11 | Western Electric Co | Electric-wave transmission system |
| US1854247A (en) * | 1928-10-30 | 1932-04-19 | American Telephone & Telegraph | Multiplex phase discrimination transmission system |
| US1797317A (en) * | 1928-12-20 | 1931-03-24 | American Telephone & Telegraph | Binaural phase-discrimination radio system |
| US2019615A (en) * | 1933-11-21 | 1935-11-05 | Electrical Res Prod Inc | Sound transmission system |
| US2098561A (en) * | 1934-02-09 | 1937-11-09 | Rca Corp | System for producing stereosonic effects |
| US2114019A (en) * | 1934-04-26 | 1938-04-12 | Western Electric Co | Sound reproducing system |
| US2137032A (en) * | 1936-09-30 | 1938-11-15 | Bell Telephone Labor Inc | Sound reproducing system |
-
0
- BE BE455396D patent/BE455396A/xx unknown
-
1944
- 1944-04-19 FR FR903556D patent/FR903556A/en not_active Expired
- 1944-04-26 CH CH245731D patent/CH245731A/en unknown
-
1946
- 1946-07-20 US US685121A patent/US2515619A/en not_active Expired - Lifetime
- 1946-11-14 GB GB33864/46A patent/GB622255A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH245731A (en) | 1946-11-30 |
| BE455396A (en) | |
| FR903556A (en) | 1945-10-09 |
| US2515619A (en) | 1950-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES202426A1 (en) | A transmission system for stereo-phone signals, and transmitters and receivers for use in such systems (Machine-translation by Google Translate, not legally binding) | |
| GB656484A (en) | Colour television system | |
| GB622255A (en) | Improvements in or relating to devices for stereophonic transmission by electric means | |
| GB540185A (en) | System of transmission of electrical waves | |
| GB472586A (en) | Improvements in or relating to radio communication systems | |
| GB583626A (en) | Improvements in frequency modulation networks | |
| GB828424A (en) | Improvements in and relating to speech signal transmission systems | |
| ES284699A1 (en) | A multiplex decoder circuit (Machine-translation by Google Translate, not legally binding) | |
| GB504711A (en) | Improvements in signal-receivers for carrier-telephony systems | |
| GB852512A (en) | Improvements in or relating to colour television transmitting systems | |
| GB1134288A (en) | Improvements in or relating to demodulation equipment for electrical signal frequency modulation transmission systems | |
| GB554914A (en) | Application of frequency dividers to the reception of signal modulated electric carrier waves | |
| GB521720A (en) | Improvements in and relating to carrier wave signalling systems | |
| GB604759A (en) | Improvements in or relating to television systems and receivers | |
| ES402133A1 (en) | Recording television signals | |
| GB658671A (en) | Multi-channel radio monitoring receiver | |
| GB792350A (en) | Improvements in or relating to single-sideband radio receivers | |
| GB694091A (en) | Improvements in multi-channel carrier telephone systems | |
| GB907122A (en) | Vestigial side band transmitter | |
| JPS5567256A (en) | Fm stereo tuner | |
| GB640986A (en) | Improvements in or relating to arrangements for transmitting electric signals occupying a wide frequency band over narrow band circuits | |
| GB898496A (en) | Improvements in or relating to speech-signal transmission systems | |
| GB519631A (en) | Improvements in or relating to television systems | |
| GB643694A (en) | Improvements in or relating to television receivers | |
| GB1136136A (en) | Multi-channel single-sideband carrier frequency system |