Thread View: comp.multimedia
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Started by Jean Koh
Mon, 26 Oct 1992 23:17
Xing's SW, Really MPEG Compression?
Author: Jean Koh
Date: Mon, 26 Oct 1992 23:17
Date: Mon, 26 Oct 1992 23:17
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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?
Author: KETAN DASHARATH PATEL
Date: Tue, 27 Oct 1992 20:42
Date: Tue, 27 Oct 1992 20:42
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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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