Method and apparatus for draining video data from a planarized video buffer
US5982425A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for draining video data from a planarized video buffer in a video camera. The method includes the steps of reading a first sequence of video data from a first plane of the planarized image buffer starting at a buffer address indicated by a first pointer, and then reading a second sequence of video data from a second plane of the planarized image buffer starting at a buffer address indicated by a second read pointer. The apparatus includes an address generation unit and a sequence counter. The address generation unit includes a number of read pointers each configured to indicate a memory location within a different data plane of a video buffer. The address unit is configured to address a sequence of memory locations in a video buffer starting at a location indicated by an active one of the read pointers. The sequence counter is configured to detect when a final memory location of the sequence of memory locations has been addressed by the address generation unit and, in response, to select a different one of the read pointers to be the active read pointer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.