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OpenDivX digest, Vol 1 #41 - 4 msgs



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Today's Topics:

   1. Remove (Hotmail)
   2. Re:  OpenDivX optimalization: +30-40% (Andrea Graziani)
   3. Re: disable B Vop in momusys (Andrea Graziani)
   4. OpenDivX] Remove (Casa)

--__--__--

Message: 1
From: "Hotmail" <[email protected]>
To: <[email protected]>
Date: Thu, 15 Mar 2001 13:34:14 +0100
Subject: [OpenDivX] Remove

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Hello can you unsuscribe me for the daily mail
I only want to receive mail about updates

thankz

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<DIV><FONT face=3DArial size=3D2>Hello can you unsuscribe me for the =
daily=20
mail</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I only want to receive mail about=20
updates</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>thankz</FONT></DIV></BODY></HTML>

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Message: 2
Reply-To: "Andrea Graziani" <[email protected]>
From: "Andrea Graziani" <[email protected]>
To: "Andrew Woznytsa" <[email protected]>
Cc: "opendivx list" <[email protected]>
Subject: Re:  [OpenDivX] OpenDivX optimalization: +30-40%
Date: Thu, 15 Mar 2001 14:02:05 -0800
Organization: ProjectMayo

Andrew:

You're asolutely right! I don't need to add the *not* coded texture block to
the motion compensated block... this is a mistake that I didn't see and can
give improvement to the decoder.
It doesn't result to me that this improves the performance of the 30% (what
a shame), probably this depends a lot from the sequence. I will run some
more profiling.
Thank you for your important review and contribution.

Regards,
Andrea (e7abe7a)

----- Original Message -----
From: "Andrew Woznytsa" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 14, 2001 2:46 AM
Subject: [OpenDivX] OpenDivX optimalization: +30-40%


> Hi All,
>
> I'm quite confused...
>
> look below and compare these algorithms.. results will be the same but
> perfomance gain will be 30-40%..
>
> regards,
>
> Andrew
>
> decoder/mp4_mblock.c/macroblock(), line 120:
>
> 1. original algorithm:
>
>   // motion compensation
>   if (interFlag)
>   {
>    reconstruct(mp4_hdr.mb_xpos, mp4_hdr.mb_ypos, mp4_hdr.derived_mb_type);
>
>    // texture decoding add
>    for (j = 0; j < 6; j++) {
>     int coded = mp4_hdr.cbp & (1 << (5 - j));
>
>     blockInter(j, (coded != 0));
>     addblockInter(j, mp4_hdr.mb_xpos, mp4_hdr.mb_ypos);
>    }
>   }
>   else
>   {
>    // texture decoding add
> [skiped]
>
> 2. my version
>
>   // motion compensation
>   if (interFlag)
>   {
>    reconstruct(mp4_hdr.mb_xpos, mp4_hdr.mb_ypos, mp4_hdr.derived_mb_type);
>
>    // texture decoding add
>    for (j = 0; j < 6; j++) {
>     int coded = mp4_hdr.cbp & (1 << (5 - j));
>     if(coded){
>          blockInter(j, (coded != 0));
>          addblockInter(j, mp4_hdr.mb_xpos, mp4_hdr.mb_ypos);
>     }
>   }
>   else
>   {
>    // texture decoding add
> [skiped]
>
>
> _________________________________________________________
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> Get your free @yahoo.com address at http://mail.yahoo.com
>
>
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--__--__--

Message: 3
Reply-To: "Andrea Graziani" <[email protected]>
From: "Andrea Graziani" <[email protected]>
To: "Arnaud Zanetti" <[email protected]>
Cc: "opendivx list" <[email protected]>
Subject: Re: [OpenDivX] disable B Vop in momusys
Date: Thu, 15 Mar 2001 14:55:40 -0800
Organization: ProjectMayo

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Yes,

You should put the value of M to 1.
In OpenDivX the B-VOPs are not supported, in accordance with the Simple =
Profile of the MPEG-4 Video standard.

Andrea

  ----- Original Message -----=20
  From: Arnaud Zanetti=20
  To: mailing list opendivx=20
  Sent: Thursday, March 15, 2001 6:58 AM
  Subject: [OpenDivX] disable B Vop in momusys


  Hello !=20
  Having read the code of encore and decore, I realized I wasn't take =
into account the new VO & VOL headers stuff.=20
  Now, the bistream encoded with Momusys (MPEG4 V2) are well decoded =
except that B Vop aren't yet supported by OpenDivX. So my question is :=20
  does someone knows how to disable B Vop in Momusys ?=20
  By the way, forget every mail telling that decore isn't MPEG4 V2 =
compliant.=20

  thanks ! _______________________________________________ OpenDivX =
mailing list [email protected] =
http://lists.projectmayo.com/mailman/listinfo/opendivx


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<HTML><HEAD>
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http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.2920.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Yes,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>You should put the value of M to =
1.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>In OpenDivX the B-VOPs are not =
supported,&nbsp;in=20
accordance with the Simple Profile of the MPEG-4 Video =
standard.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Andrea</FONT></DIV>
<DIV>&nbsp;</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A href=3D"mailto:[email protected]"=20
  [email protected]>Arnaud Zanetti</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
  href=3D"mailto:[email protected]"=20
  [email protected]>mailing list opendivx</A> =
</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, March 15, 2001 =
6:58=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [OpenDivX] disable B =
Vop in=20
  momusys</DIV>
  <DIV><BR></DIV>Hello ! <BR>Having read the code of encore and decore, =
I=20
  realized I wasn't take into account the new VO &amp; VOL headers =
stuff.=20
  <BR>Now, the bistream encoded with Momusys (MPEG4 V2) are well decoded =
except=20
  that B Vop aren't yet supported by OpenDivX. So my question is : =
<BR>does=20
  someone knows how to disable B Vop in Momusys ?=20
  <P>By the way, forget every mail telling that decore isn't MPEG4 V2 =
compliant.=20

  <P>thanks ! _______________________________________________ OpenDivX =
mailing=20
  list [email protected]=20
  =
http://lists.projectmayo.com/mailman/listinfo/opendivx</P></BLOCKQUOTE></=
BODY></HTML>

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Message: 4
From: "Casa" <[email protected]>
To: <[email protected]>
Date: Fri, 16 Mar 2001 08:51:06 +0100
Subject: [OpenDivX] OpenDivX] Remove

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Please unsubscribe me from the mail list of projectmayo.

Thanks

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