Methods and apparatus for correction of 2-3 field patterns
US6559890B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1999 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Apr 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0112
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided for allowing a user to correct a discontinuous 2-3 field sequence within a disrupted video signal. A 2-3 field pattern fixer can be operated in a one-pass mode and/or a two-pass mode. In the one-pass mode, the disrupted video signal is analyzed to generate correction information, which is used to correct the disrupted video signal as it passes through the 2-3 pattern fixer, resulting in an undisrupted video signal with a continuous 2-3 field sequence. In the two-pass mode, the disrupted video signal is analyzed to generate correction information, which is then stored. This correction information is then used to correct a duplicate of the disrupted video signal, resulting in an undisrupted video signal with a continuous 2-3 field sequence. In this connection, the 2-3 field pattern fixer includes a field sequence detector, a field sequence analyzer, a field sequence generator and a multiple delay tap circuit. The field sequence detector generates field difference values in response to receiving the disrupted video signal. The field sequence analyzer analyzes these field difference values to determine one or more discontinuities within the discontinuou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.