Alternating line video recorder/reproducer
US4090214A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/92
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Color video recording apparatus is known wherein, for purposes of bandwidth compression, luminance information and chrominance information is alternately recorded for the transmitted lines of a television picture frame. Upon playback a video signal is reconstructed for each line by combining the signal recorded for that line (luminance or chrominance) with the signal recorded for the preceding line (chrominance or luminance). Rather than leave half of the lines of the recorded television picture frame void of luminance information, the present invention, through recognition and correction of an inefficiency in the alternating line recording scheme described above, enables the "gaps" in luminance information to be filled in with narrow bandwidth luminance information at no increase in the bandwidth handling requirements of the recording system. In one embodiment of the invention, wide bandwidth luminance information is recorded for every other line of a television picture frame while narrow bandwidth luminance plus chrominance information is recorded for the remaining lines. To utilize this recorded information, a video signal is reconstructed upon playback by combining the signal r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.