Line tripler for NTSC/HDTV dual receiver
US5485217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1993 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Oct 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0125
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A line tripler for an NTSC/HDTV dual receiver includes a control signal generation section for generating write enable signals and read enable signals. A FIFO line memory section writes each line of an NTSC video signal three times at a predetermined write sampling rate in response to the write enable signals from the control signal generation section to triple each line. The memory section sequentially outputs the stored three lines of the NTSC video signal at a predetermined read sampling rate in response to the plurality of read enable signals from the control signal generation section. The increase in the number of samples of each line of the NTSC video signal is made possible by adjusting the sampling rate or clock signal frequency in reading the stored three lines of the NTSC video signal. A format of the NTSC signal can be converted into an HDTV format of 16:9 or 4:3 aspect ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.