Decoder for digital information T.V. signal
US4611227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1982 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | Nov 22, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television receiver is provided with a decoder (32) for decoding and displaying data which is included in a wide band video signal. In order to provide high resolution graphics, a processor (45) is connected to a data page store (41) of the decoder (32) and a program store (47). Instructions for the processor (45) are received `off air` and are stored in the store (41). The instructions are executed using programs stored in the store (47). A clock circuit (45a) is provided for the processor (45) to enable delays and other timed sequences to be introduced and a rounding circuit (46a) ensures as smooth an output display as possible. Data can additionally be received from another soce via a telephone line and selected for display in place of the `off air` data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.