| Autor: |
Jacobsen, Dana, Fritz, Terry |
| Zdroj: |
Research Disclosure; Aug2004, Issue 484, p1063-1063, 1/2p |
| Abstrakt: |
This research disclosure provides information on the rolling buffer method used for increasing the usability of a digital camera using wireless downloading. Digital cameras use removable memory devices such as Compact Flash or SD to store images. Downloading of images using wireless methods such as Bluetooth or 802.11b have been utilized. In the solution the memory area is used as a rolling buffer while the wireless device downloads the data files to the host device. As soon as image 1 starts being written to memory, a wireless download also starts. Each image as taken is tagged in memory as not downloaded. When image 1 has been successfully downloaded, the tag is changed to downloaded and the next image is then downloaded. Methods for ensuring a valid transfer has been done such as checksums and the like are well known and can be used. The files are not removed from memory at such a stage. At some point, a new image will be taken and the card will be full. At this point, a search is performed to find the oldest image is marked downloaded. A variation of the solution modifies the downloading process to save power. Some wireless mechanisms such as 802.11b use power which may be a significant issue in a camera. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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