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  1. #1
    Vin Miller
    Guest
    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




  2. #2
    Q
    Guest

    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).





  3. #3
    Michael Pronay
    Guest

    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.



  4. #4
    Vin Miller
    Guest

    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).




  5. #5
    Fry
    Guest

    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...





  6. #6
    Q
    Guest

    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?





  7. #7
    Q
    Guest

    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.





  8. #8
    JACOBSPC.com
    Guest

    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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