Apparatus and method for providing multiple data streams from stored data using dual memory buffers
US5572691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1993 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Apr 21, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method are disclosed for processing successive frames of data to provide a plurality of data streams containing the data in different orders. In an illustrated embodiment, two different data streams are output for incoming frames of video data. Pixels are grouped from an incoming current video frame to provide successive pairs thereof for storage in a first memory bank at a first clock rate .phi.. Stored pixel pairs are read from a second memory bank containing a previous video frame at a second clock rate 2.phi. while the pairs of pixels from the current video frame are being stored in the first memory bank at rate .phi.. This provides two pairs of pixels from the previous video frame for each one pair of pixels stored from a current video frame. The pixel pairs from the previous video frame output from the second memory bank are combined into two data streams, each providing the pixels in a different order. The memory banks are alternated to process successive frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.