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Thread: single chip MPEG video decoing
www.piclist.com/techref/displays.htm?key=video
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face BY : Richard Sloan email (remove spam text)



I was the one who started this thread and after looking around it is correct

Encoding is digital to analog
and decoding is analog to digital, its all with respect to the digital in this case.

If you go to **ANY** IC manufacturers site this is what you find.

R.

 >>  Well, I would have thought the other way around, too, (same as Stuart)
 >>  considering that
 >>  MPEG is a method of ENCODING a video signal (especially if you consider
 >>  NTSC or other analog video to be a "simpler" or "closer to physical"
 >>  representation).

 >>  Also, with MPEG audio (MP3), software that you usually use on PCs
 >>  definitely uses the terms ENCODE for converting from analog or WAV files
 >>  to MP3 and DECODE for normal playback.

 >>  Sean


 >>  On Mon, 29 Jan 2001, Chris Carr wrote:

 >>  > Stewart, I have no intention of getting involved in terminology wars.
 >>  > If you can quote your sources of reference for the information given
 >>  > below  then I may be prepared to agree with you. However, the CCIR who
 >>   are
 >>  > the international standards setting body DECODE an analogue video signal
 >>  > into digital and ENCODE a digital signal into analogue video.
 >>  >
 >>  > If you want chips for a set top box to receive digital video
 >>   transmissions
 >>  > you look for Encoder Chips.
 >>  >
 >>  > Chris
 >>  >
 >>  >
 >>  > > I just thought I would clear some things up here.
 >>  > >
 >>  > > Mpeg Encoder= Takes an analogue video signal or an un-compressed
 >>   digital
 >>  > > video data stream as an input and outputs an MPEG data stream. You
 >>   will
 >>  > not
 >>  > > find this as a one chip solution.
 >>  > >
 >>  > > MPEG Decoder= Takes an MPEG data stream as an input and will output an
 >>  > > analogue video signal or an un-compressed digital video data stream.
 >>   You
 >>  > > will possibly find this as a multiple chip solution depending on the
 >>  > quality
 >>  > > you would like.
 >>  > >
 >>  > > Composite Video= Component, RGB or S- video that has been encoded
 >>   using a
 >>  > > composite encoder. One chip solution
 >>  > > Regards
 >>  > > Stuart O'Reilly
 >>  > >
 >>  > >
 >>  > > {Original Message removed}
<20010129201139.QKGF2929.femail2.rdc1.on.home.com@CR677381-A> quoted-printable

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