GB332284A - Improvements in electrical transmission systems - Google Patents
Improvements in electrical transmission systemsInfo
- Publication number
- GB332284A GB332284A GB12075/29A GB1207529A GB332284A GB 332284 A GB332284 A GB 332284A GB 12075/29 A GB12075/29 A GB 12075/29A GB 1207529 A GB1207529 A GB 1207529A GB 332284 A GB332284 A GB 332284A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- telegraphic
- receiver
- transmitted
- picture signals
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/0803—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division using frequency interleaving, e.g. with precision offset
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
- H04N7/127—Systems in which different parts of the picture signal frequency band are individually processed, e.g. suppressed, transposed
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Facsimiles In General (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Optical Communication System (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
332,284. Western Electric Co., Md., (Bell Telephone Laboratories, Inc.). April 18, 1929. Television; duplex and multiplex signalling. - In television or highspeed copying-telegraphy the frequency ranges between the groups of frequencies constituting the picture signals are used for transmitting synchronizing, telegraphic, or other signals. The picture signals contain frequency bands around the linescanning frequency and its harmonics and with a width of about' 20 per cent of the line-scanning frequency, and the auxiliary signals are transmitted on frequencies approximately mid-way between the frequency bands of the picture signals. At the transmitter, Fig. 8, picture signals amplified from a. photo-electric cell 30, synchronizing current from an alternating current generator 23, and carrier-current telegraphic currents, from a key 120 are transmitted to a line 100 through a filter 90 (Figs. 10 and 11, not shown) which passes incoming telegraphic signals to a receiver 130. At the receiver, Fig. 9, the picture signals are transmitted to a lamp 270, the synchronizing signals to a motor 243 synchronized as described in Specification 292,597, and the telegraphic signals to a receiver 230, through a filter 210 (Figs. 12 and 13, not shown). Outgoing carriercurrent telegraphic signals are produced by a key 220.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US359211A US1769919A (en) | 1929-04-30 | 1929-04-30 | Electrooptical transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB332284A true GB332284A (en) | 1930-07-18 |
Family
ID=23412809
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12075/29A Expired GB332284A (en) | 1929-04-30 | 1929-04-18 | Improvements in electrical transmission systems |
GB7789/30A Expired GB350455A (en) | 1929-04-30 | 1930-03-10 | Improvements in television |
GB7788/30A Expired GB350454A (en) | 1929-04-30 | 1930-03-10 | Improvements in or relating to electrical image translating images |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7789/30A Expired GB350455A (en) | 1929-04-30 | 1930-03-10 | Improvements in television |
GB7788/30A Expired GB350454A (en) | 1929-04-30 | 1930-03-10 | Improvements in or relating to electrical image translating images |
Country Status (4)
Country | Link |
---|---|
US (1) | US1769919A (en) |
DE (3) | DE600042C (en) |
FR (3) | FR675539A (en) |
GB (3) | GB332284A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1018098B (en) * | 1935-08-06 | 1957-10-24 | Fernseh Gmbh | Arrangement for the synchronization of several broadcasting points from a central point for television and image transmissions |
US2636937A (en) * | 1949-04-01 | 1953-04-28 | Rca Corp | Signal separating circuit for color television |
BE506696A (en) * | 1950-10-31 | 1900-01-01 | ||
US2832817A (en) * | 1952-07-21 | 1958-04-29 | Raibourn Paul | Intelligence transmission system |
NL104022C (en) * | 1952-08-23 | |||
US2982813A (en) * | 1958-08-28 | 1961-05-02 | Sound | |
DE1248094B (en) * | 1958-08-28 | 1967-08-24 | Rca Corp | Television transmission device with reserve audio channel |
DE1244842B (en) * | 1965-08-05 | 1967-07-20 | Telefunken Patent | Television transmission system in which a control signal for a writing device is also transmitted |
-
1929
- 1929-04-18 GB GB12075/29A patent/GB332284A/en not_active Expired
- 1929-04-30 US US359211A patent/US1769919A/en not_active Expired - Lifetime
- 1929-05-05 DE DEE39210D patent/DE600042C/en not_active Expired
- 1929-05-22 FR FR675539D patent/FR675539A/en not_active Expired
-
1930
- 1930-02-19 FR FR38105D patent/FR38105E/en not_active Expired
- 1930-03-01 DE DE1930627126D patent/DE627126C/en not_active Expired
- 1930-03-05 FR FR38465D patent/FR38465E/en not_active Expired
- 1930-03-10 GB GB7789/30A patent/GB350455A/en not_active Expired
- 1930-03-10 GB GB7788/30A patent/GB350454A/en not_active Expired
- 1930-03-12 DE DE1930629604D patent/DE629604C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE627126C (en) | 1936-03-09 |
US1769919A (en) | 1930-07-08 |
DE629604C (en) | 1936-05-12 |
GB350455A (en) | 1931-06-10 |
DE600042C (en) | 1934-07-18 |
FR38465E (en) | 1931-06-06 |
FR675539A (en) | 1930-02-11 |
GB350454A (en) | 1931-06-10 |
FR38105E (en) | 1931-03-19 |
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