Method and apparatus for a memory efficient approach for decoding progressive joint photographic experts group (JPEG) images
US9154800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2013 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Nov 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A computer implemented method and apparatus for a memory efficient approach for decoding progressive JPEG images. The method comprises (a) accessing a progressive JPEG image, wherein the progressive JPEG image comprises a plurality of compressed scans and wherein each scan in the plurality of scans comprises a plurality of compressed rows of image data; (b) decompressing not more than half of the compressed rows of each scan in the plurality of scans into a memory buffer; (c) copying a remaining plurality of compressed rows of each scan in the plurality of scans into a plurality of small memory buffers; (d) decoding, in place, the decompressed rows in the memory buffer; and (e) repeating steps (b)-(d) until a predefined number of rows are remaining in the plurality of small memory buffers, at which time the remaining rows are decompressed and decoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.