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Vorbis development, status & patent issues, PART 2 - Technical discussion
Gabriel
post Sep 25 2003, 14:37
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Moderator comment
Currently the Vorbis patent issue covers these threads:
Vorbis development, status & patent issues PART 1 - NON-technical discussion
Vorbis development, status & patent issues PART 2 - Technical discussion (This thread)
/Moderator comment

By looking at this:
http://www.xiph.org/archives/vorbis-dev/20...2/index.html#83
it seems that Xiph (at least in 2000) was open to the idea of disclosing the patent research.
Is this position changed now, or does it still stand?
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Ivan Dimkovic
post Sep 26 2003, 01:13
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I mean - in my opinion, the purpose of the Claim 1 is only to faciliate the need for the window switching from long to short blocks, in case of signal amplitude change - not to elaborate the exact switching method - because the patent itself is about MDCT switched filterbank and not about the switching methods / threshold estimations. That's why they stated "signal amplitude change" only, because this is the reason for block switching in any case - no matter how you look at the signal as I already explained in my previous post.

Elaborate methods for block switching are covered in some later patents from Johnson (M/S psychoacoustic model patent - PE based switching) and Herre/Brandenburg (patent covering time-domain block switching only, dating from 1998 IIRC). Dolby AC3 uses other time-domain block switching method which might be patented but I am not sure.

This post has been edited by Ivan Dimkovic: Sep 26 2003, 01:15
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Posts in this topic
- Gabriel   Vorbis development, status & patent issues   Sep 25 2003, 14:37
- - c_haese   QUOTE (Ivan Dimkovic @ Sep 25 2003, 08:12 AM)...   Sep 25 2003, 14:43
- - Ivan Dimkovic   QUOTE Fair enough, let's start a scientific di...   Sep 25 2003, 14:53
- - Ivan Dimkovic   One more thing - the claims are not related to any...   Sep 25 2003, 14:59
- - menno   Claim 1 from patent US5214742: QUOTE 1. In a metho...   Sep 25 2003, 15:20
- - menno   1.3. High-level Decode Process It seems that the ...   Sep 25 2003, 15:41
- - Ivan Dimkovic   Ok, so we have a pretty clear basis for a serious ...   Sep 25 2003, 15:43
- - c_haese   I've already said everything I'm qualified...   Sep 25 2003, 16:03
- - Ivan Dimkovic   Well, at least there is a nice bunch of factual da...   Sep 25 2003, 16:14
- - petracci   QUOTE (Ivan Dimkovic @ Sep 25 2003, 05:36 PM)...   Sep 25 2003, 16:50
- - Ivan Dimkovic   QUOTE Claim 1 does not claim the "windowing/o...   Sep 25 2003, 16:56
- - petracci   QUOTE (Ivan Dimkovic @ Sep 25 2003, 05:56 PM)...   Sep 25 2003, 17:07
- - Ivan Dimkovic   QUOTE First of all, do you also think that claim 1...   Sep 25 2003, 17:22
- - petracci   Yes, Claim 4 is not easy to avoid. Claim 6 points ...   Sep 25 2003, 17:34
- - c_haese   QUOTE (Ivan Dimkovic @ Sep 25 2003, 11:22 AM)...   Sep 25 2003, 17:36
- - Ivan Dimkovic   QUOTE Wouldn't all claims have to apply to mak...   Sep 25 2003, 18:30
- - jmvalin   QUOTE (petracci @ Sep 25 2003, 11:34 AM)Yes, ...   Sep 25 2003, 23:31
- - JohnV   QUOTE (jmvalin @ Sep 26 2003, 01:31 AM)QUOTE ...   Sep 26 2003, 00:23
- - Ivan Dimkovic   I took a deeper look at the patent - It seems that...   Sep 26 2003, 01:05
- - Ivan Dimkovic   I mean - in my opinion, the purpose of the Claim 1...   Sep 26 2003, 01:13
- - ErikS   QUOTE (Ivan Dimkovic @ Sep 26 2003, 01:13 AM)...   Sep 26 2003, 01:48
- - petracci   QUOTE I took a deeper look at the patent - It seem...   Sep 26 2003, 08:59
- - Ivan Dimkovic   QUOTE E.g. incorporating the rate in the switching...   Sep 26 2003, 09:05
- - petracci   QUOTE I mean - in my opinion, the purpose of the C...   Sep 26 2003, 09:16
- - menno   Doesn't Parseval's Theorem say that freque...   Sep 26 2003, 09:19
- - Ivan Dimkovic   QUOTE I can obviously not say that either of us is...   Sep 26 2003, 09:21
- - petracci   QUOTE (Ivan Dimkovic @ Sep 26 2003, 10:21 AM)...   Sep 26 2003, 09:31
- - Ivan Dimkovic   I think it was: QUOTE 5853 Michael J. Smithers,Br...   Sep 26 2003, 09:48
- - petracci   QUOTE Doesn't Parseval's Theorem say that ...   Sep 26 2003, 09:49
- - petracci   QUOTE (Ivan Dimkovic @ Sep 26 2003, 10:48 AM)...   Sep 26 2003, 09:57
- - Ivan Dimkovic   I think we got into one very serous discussion rig...   Sep 26 2003, 10:04
- - petracci   QUOTE I think we got into one very serous discussi...   Sep 26 2003, 10:12
- - Ivan Dimkovic   http://cvs.sourceforge.net/viewcvs.py/ffmp...=1.18...   Sep 26 2003, 10:38
- - petracci   QUOTE I dunno about the patent - will take some ti...   Sep 26 2003, 10:49
- - Ivan Dimkovic   Actually, I never tried that FFMPEG code, so I am ...   Sep 26 2003, 10:53
- - petracci   QUOTE Actually, I never tried that FFMPEG code, so...   Sep 26 2003, 11:01
- - Ivan Dimkovic   QUOTE If they paid for licensing that patent on wi...   Sep 26 2003, 11:06
- - DSPguru   QUOTE (Ivan Dimkovic @ Sep 26 2003, 16:53 PM)...   Sep 26 2003, 11:15
- - Ivan Dimkovic   QUOTE recently, the official ffmpeg homepage had b...   Sep 26 2003, 11:21
- - Ivan Dimkovic   QUOTE e.g. if the complete technological details w...   Sep 26 2003, 12:01
- - petracci   QUOTE Ivan Dimkovic That is also interesting,...   Sep 26 2003, 12:18
- - Ivan Dimkovic   QUOTE If a respected developer/researcher like Iva...   Sep 26 2003, 12:34
- - petracci   QUOTE You are right - I am not sure,  of cour...   Sep 26 2003, 14:18
- - danchr   QUOTE (DSPguru @ Sep 26 2003, 12:15 PM)QUOTE ...   Sep 27 2003, 11:09
- - c_haese   Okay, let's get back to the scientific problem...   Sep 29 2003, 22:17
- - menno   QUOTE (c_haese @ Sep 29 2003, 10:17 PM)After ...   Sep 30 2003, 14:03
- - Ivan Dimkovic   Ok, for those with lmiited ability to read: Inste...   Sep 30 2003, 23:09
- - JohnV   Thread re-arranged. This thread is now only for te...   Oct 1 2003, 09:00
- - jmvalin   QUOTE (Ivan Dimkovic @ Sep 30 2003, 05:09 PM)...   Oct 1 2003, 23:26
- - Ivan Dimkovic   QUOTE (jmvalin @ Oct 1 2003, 10:26 PM)QUOTE (...   Oct 2 2003, 09:21
- - JohnV   Ok, I asked Xiph's opinion about this specific...   Oct 5 2003, 23:38
- - Ivan Dimkovic   All in all, this is how I perceive the picture... ...   Oct 6 2003, 08:30
- - jmvalin   QUOTE (JohnV @ Oct 5 2003, 05:38 PM)Ok, I ask...   Oct 6 2003, 20:11
- - JohnV   QUOTE (jmvalin @ Oct 6 2003, 10:11 PM)QUOTE (...   Oct 6 2003, 21:25
- - jmvalin   QUOTE (JohnV @ Oct 6 2003, 03:25 PM)Discussio...   Oct 7 2003, 03:17
- - JohnV   QUOTE (jmvalin @ Oct 7 2003, 05:17 AM)I said ...   Oct 7 2003, 04:54
- - jmvalin   QUOTE I was the only one who was talking about tha...   Oct 7 2003, 06:40
- - JohnV   QUOTE (jmvalin @ Oct 7 2003, 08:40 AM)OK, fir...   Oct 7 2003, 07:09
- - Ivan Dimkovic   Like I said - if somebody is so sure he avoided pa...   Oct 7 2003, 08:06
- - PatchWorKs   I don't want to be boring, but i have to say i...   Oct 7 2003, 08:34
- - Dibrom   QUOTE (PatchWorKs @ Oct 7 2003, 12:34 AM)I do...   Oct 7 2003, 08:43
- - sthayashi   JohnV, It seems to me that Monty's unofficial...   Oct 7 2003, 14:22
- - Ivan Dimkovic   QUOTE (PatchWorKs @ Oct 7 2003, 07:34 AM)I do...   Oct 7 2003, 14:36
- - Ivan Dimkovic   QUOTE (sthayashi @ Oct 7 2003, 01:22 PM)JohnV...   Oct 7 2003, 15:02
- - rsilva   Let me try to "preach to the deaf" once ...   Oct 7 2003, 19:17
- - sthayashi   QUOTE (Ivan Dimkovic @ Oct 7 2003, 06:02 AM)W...   Oct 7 2003, 20:41
- - ScorLibran   QUOTE (sthayashi @ Oct 7 2003, 03:41 PM)QUOTE...   Oct 7 2003, 21:20
- - Ivan Dimkovic   QUOTE "Vorbis is a hybrid transform domain ge...   Oct 7 2003, 23:00
- - Ivan Dimkovic   QUOTE (sthayashi @ Oct 7 2003, 07:41 PM) QUOT...   Oct 7 2003, 23:04
- - PatchWorKs   From XviD.org website: QUOTE European parliament ...   Oct 8 2003, 09:39
- - Ivan Dimkovic   I don't know what XVid claims (and for what pa...   Oct 8 2003, 10:07
- - Ivan Dimkovic   QUOTE Sorry to be so boring...  Sorry if I s...   Oct 8 2003, 11:27
- - Garf   QUOTE (ScorLibran @ Oct 7 2003, 10:20 PM)(Not...   Oct 8 2003, 17:07
- - Diocletian   QUOTE (Ivan Dimkovic @ Sep 26 2003, 12:01 PM)...   Oct 9 2003, 18:27
- - ScorLibran   QUOTE (Diocletian @ Oct 9 2003, 01:27 PM)Do y...   Oct 9 2003, 19:09


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