Video window generator with scalable video
US5402513A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1994 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jun 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/125
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel processor is disclosed which is comprised of a video window generator (VWG) (10). VWG (10) utilizes a conversion section for receiving an input video signal in a YUV 422 video format and converting it to an RGB video format. The conversion section includes a chroma interpolator 56 for converting the YUV 422 video format to a YUV 444 video format, a color converter (58) for converting the YUV 444 video format to an RGB video format, and then to a gamma coding removal block (60) for removing gamma coding. After conversion, the RGB video format signal is then scaled down by a linear resampler block (62) to average information over a predetermined portion of the input display space for output to a predetermined portion of the output display space. The scaled video output is truncated by a quantization processor (64) and then input to a FIFO (66). A control unit (68) controls the operation of the system. The linear resampler circuit (68) is an interpolation filter for averaging the information of a number of pixels disposed about a point in the input display space that is to be mapped into a point in the output display space. The point in the output display space is comprised of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.