Multi-function USB capture chip using bufferless data compression
US6184936A · kind A · utility
59Cited by
9References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/001
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for capturing live video signal data using bufferless data compression is disclosed. Live video signal data is vertically scaled. A 4:2:2 to 4:2:0 color format conversion is performed simultaneous with the vertical scaling step. A one-dimensional bufferless discrete cosine transform is performed on the scaled live video signal data to create a plurality of scaled DCT coefficients. Each of the plurality of scaled DCT coefficients are then Huffman coded. Each of the Huffman encoded DCT coefficients may then be sent via a USB interface to a USB bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.