Process and system for the compression of digital video signals, a system and a computer program product therefor
US6925119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2002 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Jan 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for encoding digital video signals organized in frames comprises the operations of dividing the frames into blocks starting from macroblocks subjected to motion-compensation and applying to the blocks a discrete cosine transform in such a way as to generate respective sets of coefficients. The sets of coefficients are then assembled by being organized into sets of vectors by a assembling module. Once the variance of the vectors has been detected, the vectors themselves are quantized on a number of available bits by a pyramid vector quantizer, associating to the vectors respective quantization pyramids having given sizes according to the variance detected and to the number of available bits. Finally, the vectors are encoded with respective codewords.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.