Automatic test instrument for multi-format video generation and capture
US6396536B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for producing a static composite video signal, e.g., for delivery to a unit under test (UUT), in which a prime image memory (PIM 28) holding a main bit mapped image is provided, sync and blanking patterns for lines of the video signal being generated are held in a composite sync memory (C-Sync 32), and a series of arbitrary bit line patterns defined in a test program are held in two user specified pulse memories (USPs 36,38). Data blocks are arranged in a circular queue in a line parameter memory (LPM 40), each data block corresponding to a complete video line and containing pointers to specific entries in the PIM (28), the C-Sync (32) and the USPs (36,38) and a flag indicative of scan direction. Production of the video signal is initiated by reading the LPM (40)and extracting the pointers from the data blocks for a first line of the video signal being produced. Bits from the PIM (28), C-Sync (32) and USPs (36,38) are obtained based on the extracted pointers and combined to thereby form the video signal. The length of the first line of video signal being produced is monitored to determine when the first line of video is complete, and then production of the video signal is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.