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- 12-11-2003, 10:46 AM #1Vin MillerGuest
Hey all. A quick question -- how are photos stored on cell phone
ericsson cameras? If the cell phone battery goes dead, are the photos lost? To
use PC terminology as an analogy, are they stored "on disk" or "in
RAM?"
Thanks.
› See More: Call phone camera question
- 12-11-2003, 01:40 PM #2QGuest
Re: Call phone camera question
Vin Miller - typed:
> Hey all. A quick question -- how are photos stored on cell phone
> ericsson cameras? If the cell phone battery goes dead, are the photos
> lost? To use PC terminology as an analogy, are they stored "on disk"
> or "in
> RAM?"
>
> Thanks.
No. Do you have a halfway decent pocket calculator, possibly
programmable? It wouldn't be of much use if it lost its programs or
memories when switched off. It's called non-volatile memory. When you
remove the battery from either a phone or calculator, the data is still
retained, albeit for a finite period. A phone has a memory backup
battery. Photos are stored in a similar way to how your phone book
entries are. I would expect most next gen camera phones to have external
memory cards which retain their data without backup power (ie existing
storage technology & in the case of SE, probably Sony Memory Sticks for
political reasons).
- 12-12-2003, 03:40 AM #3Michael PronayGuest
Re: Call phone camera question
"Q" <[email protected]> wrote:
> I would expect most next gen camera phones to have external
> memory cards which retain their data without backup power (ie
> existing storage technology & in the case of SE, probably Sony
> Memory Sticks for political reasons).
P900 uses them already, afaik.
M.
- 12-12-2003, 06:27 AM #4Vin MillerGuest
Re: Call phone camera question
>>> the data is still retained, albeit for a finite period.
Any idea of how long this period is?
I have a long boring reason for asking, but suffice it to say that I
am hoping they will stick around for a few weeks.
"Q" <[email protected]> wrote in message news:<[email protected]>...
> Vin Miller - typed:
> > Hey all. A quick question -- how are photos stored on cell phone
> > ericsson cameras? If the cell phone battery goes dead, are the photos
> > lost? To use PC terminology as an analogy, are they stored "on disk"
> > or "in
> > RAM?"
> >
> > Thanks.
>
> No. Do you have a halfway decent pocket calculator, possibly
> programmable? It wouldn't be of much use if it lost its programs or
> memories when switched off. It's called non-volatile memory. When you
> remove the battery from either a phone or calculator, the data is still
> retained, albeit for a finite period. A phone has a memory backup
> battery. Photos are stored in a similar way to how your phone book
> entries are. I would expect most next gen camera phones to have external
> memory cards which retain their data without backup power (ie existing
> storage technology & in the case of SE, probably Sony Memory Sticks for
> political reasons).
- 12-12-2003, 01:29 PM #5FryGuest
Re: Call phone camera question
Vin Miller wrote:
> Hey all. A quick question -- how are photos stored on cell phone
> ericsson cameras? If the cell phone battery goes dead, are the photos
> lost? To use PC terminology as an analogy, are they stored "on disk"
> or "in
> RAM?"
You've nothing to worry about, phones (at least all the ones i've seen)
store photos on Flash Memory, which won't "forget" things...
- 12-12-2003, 02:54 PM #6QGuest
Re: Call phone camera question
Michael Pronay - typed:
> "Q" <[email protected]> wrote:
>
>> I would expect most next gen camera phones to have external
>> memory cards which retain their data without backup power (ie
>> existing storage technology & in the case of SE, probably Sony
>> Memory Sticks for political reasons).
>
> P900 uses them already, afaik.
>
> M.
IIRC, the problem with M Sticks is they can only go up to 128MB. The
256MB version (which I believe the P800/900 don't support) has to be
switched between banks!?
As a general aside, My Olympus C4040 uses a now obsolete but readily
available format. I really do wish companies would curtail their love of
proprietary standards & formats! CF, SD, MMC, xD, SM etc all use roughly
the same technology differentiated by size, capacity, pinout & how much
processing is done in the host or the card. Olympus & Sony are the worst
offenders with flash memory. CF seems to be the de facto standard for
cameras & the dust hasn't settled for phones - MMC?
- 12-12-2003, 04:39 PM #7QGuest
Re: Call phone camera question
Vin Miller - typed:
>>>> the data is still retained, albeit for a finite period.
>
> Any idea of how long this period is?
>
> I have a long boring reason for asking, but suffice it to say that I
> am hoping they will stick around for a few weeks.
>
Fry suggests that camera phones use flash memory for picture storage &
therefore would probably retain for 10s of years. If they didn't use
flash memory, probably years. Not exactly a definitive answer but this
url maybe a starting point (on how RAM & Flash Memory works):
http://computer.howstuffworks.com/flash-memory.htm
& particular to phones:
http://america.renesas.com/news/030912_supersram.html
This new product brief mentions the need for multi-chip packages which
contain RAM & flash memory for phones.
- 12-22-2003, 02:48 AM #8JACOBSPC.comGuest
Re: Call phone camera question
NO,
I will not be lost !
Greetings,
www.jacobspc.com !
"Vin Miller" <[email protected]> schreef in bericht
news:[email protected]...
> Hey all. A quick question -- how are photos stored on cell phone
> ericsson cameras? If the cell phone battery goes dead, are the photos
lost? To
> use PC terminology as an analogy, are they stored "on disk" or "in
> RAM?"
>
> Thanks.
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