GB350455A - Improvements in television - Google Patents
Improvements in televisionInfo
- Publication number
- GB350455A GB350455A GB7789/30A GB778930A GB350455A GB 350455 A GB350455 A GB 350455A GB 7789/30 A GB7789/30 A GB 7789/30A GB 778930 A GB778930 A GB 778930A GB 350455 A GB350455 A GB 350455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- currents
- pass filter
- receiver
- frequency
- television
- 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)
- Closed-Circuit Television Systems (AREA)
- Optical Communication System (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
350,455. Superposed telephony and television. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Gray, F. ; 243, West 101st Street, New York, U.S.A.) March 10, 1930, No. 7789. Convention date, April 30, 1929. Addition to 332,284, [Class 40 (v), Wireless signalling &c.]. [Class 40 (iv).] The whole or part of a picture current is modulated by, or combined with, a carrier wave of constant frequency to obtain a derived current, the frequency components of which are interleaved with the frequency components of other currents, e.g. telephone currents, as described in the parent Specification, and impressed with the other currents on a common transmitting circuit 200. A telephone transmitter 500, Fig. 2, and receiver 510 are connected to line through a low-pass filter 520 with a cut-off frequency of 2700 cycles, and, when the microphone is disconnected by a switch 501, a balancing resistance 502 is connected in circuit to maintain the circuit characteristics unchanged. At the receiver, Fig. 3, the telephony currents are separated by a low-pass filter 302 and the picture currents pass through a high-pass filter 301 to a television receiver.
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 |
|---|---|
| GB350455A true GB350455A (en) | 1931-06-10 |
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 Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12075/29A Expired GB332284A (en) | 1929-04-30 | 1929-04-18 | Improvements in electrical transmission systems |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
| BE522116A (en) * | 1952-08-23 | |||
| DE1248094B (en) * | 1958-08-28 | 1967-08-24 | Rca Corp | Television transmission device with reserve audio channel |
| US2982813A (en) * | 1958-08-28 | 1961-05-02 | Sound | |
| 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 |
|---|---|
| GB350454A (en) | 1931-06-10 |
| DE627126C (en) | 1936-03-09 |
| DE600042C (en) | 1934-07-18 |
| DE629604C (en) | 1936-05-12 |
| FR38105E (en) | 1931-03-19 |
| FR38465E (en) | 1931-06-06 |
| GB332284A (en) | 1930-07-18 |
| US1769919A (en) | 1930-07-08 |
| FR675539A (en) | 1930-02-11 |
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