DVB-T on Nokia 770
 

Is there someone who would like to share some thougths on interfacing those DVB-T usb stick to the Nokia 770?

hi,

i doen't believe that 770 is fast enough. Mostly the USB-Stick will work only on fast pc's like P4.

You are wrong about USB Stick working only on Fast computers... USB Sticks works on every single computer that have a USB port and the OS supports it.

about DVB-T I am not sure if it would supported I dont think ARM 250MHz can be enough to decode digital signals but than again I can be wrong... I know the 770 uses a co processor for decoding media and that can probably take care of it...

The processor of N770 does not definitely have the required power to handle decoding of DVB-T stream. DVB-H could be a possibility, but I don't think there are such USB sticks out there. Altough, there aren't any companies broadcasting DVB-H either. At least not yet.

Thanks, Teemu.
The dvb-t bitrates range from about 5 to about 32 Mbit/s (wikipedia). Do you mean there is no sufficient processing power even for those lower bitrates?

With Mplayer you can decode max 400x24@25fps@0.5Mbps. Definitely not enough CPU power for DVB-T decoding.

so why most of them want as minimum system requirement?
And with my dell notebook PIII 800mhz (sure faster than my nokia 770) none of the USB-Stick are working

There are cell-phones out there with DVB-T tuners built-in (Nokia N?? afair), but I am sure this is done by hardware integration and not by CPU decompression. I don't think the N770 has a built-in floating point processor - recall a number of discussions in here about it actually - so the decompression of video streams this size could very well be infeasible.

//Kny

So the only way could be handing out much of the decoding work outside the Nokia 770... or waiting the Nokia 770 successor!

Actually, the N770 has a DSP, (Digital Signal Proccessor) which can be thought of as an FPU (Floating Point Unit) on steriods. It is used by the built-in video and audio applications (but not AFAIK by Mplayer). (The same DSP is used as the only proccessor in some MP3 players.) Although, seeing as I seem to remember that a typical DVB-T stream is about 20MBit (2.5MB/s), it would still be a streach. Maybe do-able.

From what is reported here: http://www.internettablettalk.com/content/view/108/2/ the wlanTV project was close to the goal. Has someone ever seen this application working? Are they still developing?