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  1. #1
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    [split] Video over GSM (was: Re: retrieve GSM cell id )

    Hi,

    I am new in symbian develepp
    I want to develop Symbian application for Nokia 95.

    My application consist to make a remote surveillance(real time) between two mobile (by using the camera).

    So, can i send a video data using GSM and not the GPRS?
    if yes what is the protocol?
    regards

  2. #2
    Nokia Developer Moderator
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    By GSM I guess you mean Circuit Swithced Data (as oposed to GPRS which is Packet Switched Data) and the answer for that will be yes, it is possible, if you use a very good coded and if you are satisfied with image quality comparable with Nokia's Video Call application. And you still need a 3G network connection for having a decent framerate ...
    -- Lucian

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  3. #3
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    hi

    thank you for the reply.
    in fact, I dont like to use a 3G network. I want to know can i send images in real time using just GSM (2G)? I think the GSM provides protocols for the transfer of data in real time?

  4. #4
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    I need calirification.
    I want to send real-time video from mobile to mobile.
    Can I do it by GSM network only? if so what is the protocol? CSD?

    in my country we have just the GSM and the GPRS????

    thanks

  5. #5
    Nokia Developer Moderator
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    The main diference between GSM (1G) and 3G networks in the badnwidth they can provide. Of course you can transfer data between point A and point B on GSM networks too but the question is how much data? If you are planning to send 1x1 pixels monocrome videos then yes, the bandwidth is enough. For bigger images and more colors, depending on the codec used you will have some specific bandwidth needs but that is pure math so if you get down to it you can easily determined what is the highes quality video you can transfer. Apparenlty Nokia and the operators have studied the issue and the conclusion was that they need to invest big money in more advanced devices and networks in order to support video telephony service. Most likely the reason was the same math ...

    Clear now?
    Last edited by ltomuta; 2009-03-05 at 18:53. Reason: Typos. Left the 1G error in place :)
    -- Lucian

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  6. #6
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    GSM = 2G. Analog networks were 1G.

    With GSM circuit-switched calls (CSD) you can also get higher bandwidth by using more slots, but the calls will be more expensive (HSCSD, High-Speed CSD).

    GPRS is the packet data transfer mechanism over GSM. Still 2G.

    EDGE is an enhancement over GPRS, and some call it 2.5G.

    WCDMA/UMTS packet data 3G.

    HSDPA that increases the down-link bandwidth is sometimes called 3.5G.

    HSUPA that increases the up-link could be called 3.75G.

    And I guess LTE will be the "real" 4G (some have thought of WLAN/Wi-Fi on phones or WiMAX as 4G, too).

  7. #7
    Nokia Developer Moderator
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    Quote Originally Posted by petrib View Post
    GSM = 2G. Analog networks were 1G.

    With GSM circuit-switched calls (CSD) you can also get higher bandwidth by using more slots, but the calls will be more expensive (HSCSD, High-Speed CSD).

    GPRS is the packet data transfer mechanism over GSM. Still 2G.

    EDGE is an enhancement over GPRS, and some call it 2.5G.

    WCDMA/UMTS packet data 3G.

    HSDPA that increases the down-link bandwidth is sometimes called 3.5G.

    HSUPA that increases the up-link could be called 3.75G.

    And I guess LTE will be the "real" 4G (some have thought of WLAN/Wi-Fi on phones or WiMAX as 4G, too).
    Ups. Thanks for the history refresh. I would have remembered if one of the above technologies were 3.14159 G but as is those numbers aren't at all relevant to me (thus I should stop using them)
    -- Lucian

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  8. #8
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    Re: [split] Video over GSM (was: Re: retrieve GSM cell id )

    Video that I send is a small sequence of a mobile nokia 95.
    possible by the GSM or I go to GPRS ?

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