Television transmission system
US4706109A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1985 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | May 30, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In television transmitter equipment for a television transmission system having a time multiplexed signal in component form, the vision components are derived from a vision source (1), encoded in a MAC encoder (2) and the encoded vision signals are modulated in a frequency modulator (3) which also receives oscillations from an oscillator (4). The modulated output of the frequency modulator (3) is applied through a multiplexer (5) to a transmitter (6) whose modulated carrier is applied to a dish aerial (7) for transmission to a satellite. The equipment contains a number of sources (8 to 15) of sound/data information which are separated into two groups, an `A` group of sources (8 to 11) and a `B` group of sources (12 to 15). Digital signals from the `A` group sources are applied to an `A` packet multiplexer (17) where the signals are assembled packet-by-packet into a given time area at a bit rate of 10.125 MHz. Corresponding signals from the `B` group sources are applied to a `B` packet multiplexer (18) where these signals are similarly assembled into a corresponding time area at the same bit rate. The outputs of the `A` and `B` packet multiplexers (17, 18) are applied to respective …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.