Re: Newbie Question

On May 25, 4:47 am, nija <niti...@xxxxxxxxx> wrote:
Hi all,

I am new to the field of DSP/Video Compression. I wanted to learn
MPEG
4 Video Compression standard in particular as it is required in my
current project which is about Live Video streaming using RTSP/RTP
protocol on the internet using MPEG 4 codec.

I have read some articles/ISO standard about MPEG Video Compression
standard.Even though I did my engineering in EE ,I find them very
difficult to understand .

Please advice me how to move forward .

Thanks and Regards

To put it in a nutshell: MPEG works by taking a range of frames that
are very similar to each other, splitting each one into a bunch of
macroblocks, storing the first (key)frame as a JPEG and then only
storing the visual difference on every proceeding frame, then once
that particular scene ends and a very different frame appears, a new
keyframe is set and so on.

Of course this is as *basic* as it possibly gets and the actual
process is a WAY more complex and lengthier version consisting of
numerous algorithms and techniques with various impacts on quality/
speed etc. based on this simple philosophy. (Same as how LZW is an
advanced version of Run Length Encoding)

If you cannot understand the articles you are reading, I suggest you
first learn all the lingo like the one I just used "keyframe," and
then I'm sure all the brainy text you're reading will make more sense.

You can try Wikipedia, it may have informative articles about MPEG-4
and video compression in general, and whenever you don't understand a
particular term, just click it and you'll get a seperate article that
will explain everything.

Good luck.

.

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