[Libjpeg-devel-6x] hi.all.a stupid question!

[Galileo`s <liu...@qq...>]

hi,all.im from China,im doing a project which applies this LibJpeg to convert RGB to JPEG.mealwhile,im using uCGUI(know ucOSII??),but uCGUI only uses the part of decompression.i wanna send the data compressed by LibJpeg to my phone via MMS.i have a OV9650 camera .it can transferes (SCCB interface)RGB data to my s3c2440 ARM core.
 i have a little about LibJpeg and JPEG ,i read the introduce to LibJpeg.
 i wonder whether the data compressed by LibJpeg is the .jpg format.can it be read by phone directly??if not ,is it means that i must add some other info to the data compressed by LibJpeg.
 can you give me some suggestion?
 im sorry for my poor english.