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2 messages
2 total messages Started by Jean Koh Mon, 26 Oct 1992 23:17
Xing's SW, Really MPEG Compression?
#1
Author: Jean Koh
Date: Mon, 26 Oct 1992 23:17
15 lines
816 bytes
I saw the posting at some newsgroup that said
Xing's MPEG SW doesn't do real MPEG compression
- It doesn't do inter-frame compression.

I remembered some guy at UC Berkeley posted it.
Is that true?
If it is true, then is there any SW package for MPEG encoding?
Something are being developed now?

If somebody knows about this matter, please let me know at the following
email address: 
	koh@cat.syr.edu

Thank you in advance!
-Jean Koh
Re: Xing's SW, Really MPEG Compression?
#8
Author: KETAN DASHARATH PATEL
Date: Tue, 27 Oct 1992 20:42
40 lines
1857 bytes
koh@cat.syr.edu writes...
>I saw the posting at some newsgroup that said
>Xing's MPEG SW doesn't do real MPEG compression
>- It doesn't do inter-frame compression.
>
>I remembered some guy at UC Berkeley posted it.
>Is that true?
>If it is true, then is there any SW package for MPEG encoding?
>Something are being developed now?

Unfortunately, it is true. XING data in NOT true MPEG and in
fact does a lot of dubious things with its Inverse DCT.

XING data is simply a sequence of I-Frames (i.e. no interframe
compression is done, no motion vectors, nothing).
This amounts to little more than a sequence of JPEG type images.

We have developed a software MPEG decoder. It handles MPEG data
that conforms to the draft standard as of Dec 1991.
It has been alpha released last week and will be
released to the general public sometime next week
if I can get it polished in time. 

If you would like to recieve more information on how to get
it, subscribe to the mailing list mpeg-list@cs.berkeley.edu
by doing the following:

Send mail to:
		mpeg-list-request@cs.berkeley.edu

with the single word ADD or DELETE in order to join or leave the
mailing list.

DO NOT SEND JOIN/LEAVE REQUESTS TO MPEG-LIST, SEND THEM TO 
MPEG-LIST-REQUEST.

Thanks.

Ketan Patel
kpatel@cs.berkeley.edu
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