OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.

 


Help: OASIS Mailing Lists Help | MarkMail Help

emergency message

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]


Subject: [no subject]


MPEG-4 is an ISO/IEC standard developed by MPEG (Moving Picture Experts =
Group), the committee that also developed the Emmy Award winning =
standards known as MPEG-1 and MPEG-2. These standards made interactive =
video on CD-ROM and Digital Television possible. MPEG-4 is the result of =
another international effort involving hundreds of researchers and =
engineers from all over the world. MPEG-4, whose formal ISO/IEC =
designation is ISO/IEC 14496, was finalized in October 1998 and became =
an International Standard in the first months of 1999. The fully =
backward compatible extensions under the title of MPEG-4 Version 2 were =
frozen at the end of 1999, to acquire the formal International Standard =
Status early in 2000. Some work, on extensions in specific domains, is =
still in progress.=20

MPEG-4 builds on the proven success of three fields:=20

  a.. Digital television;=20
  b.. Interactive graphics applications (synthetic content);=20
  c.. Interactive multimedia (World Wide Web, distribution of and access =
to content)=20
MPEG-4 provides the standardized technological elements enabling the =
integration of the production, distribution and content access paradigms =
of the three fields.=20

More information about MPEG-4 can be found at MPEG's home page (case =
sensitive): http://mpeg.telecomitalialab.com . This web page contains =
links to a wealth of information about MPEG, including much about =
MPEG-4, many publicly available documents, several lists of "Frequently =
Asked Questions" and links to other MPEG-4 web pages. The standard can =
be bought from ISO, send mail to sales@iso.ch. Notably, the complete =
software for MPEG-4 version 1 can be bought on a CD ROM, for 56 Swiss =
Francs. It can also be downloaded for free from ISO's website: =
www.iso.ch/ittf - look under publicly available standards and then for =
"14496-5". This software is free of copyright restrictions when used for =
implementing MPEG-4 compliant technology. (This does not mean that the =
software is free of patents.=20



------=_NextPart_000_009C_01C4101B.6A5A9820
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2800.1264" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV>Dear EM TC Member -</DIV>
<DIV>&nbsp;</DIV>
<DIV>Discussion Item 1:</DIV>
<DIV>&nbsp;</DIV>
<DIV>At the last GIS SC meeting we discussed the issue of whether WGS 84 =
-=20
Lat/Long&nbsp;is adequate for this go around of the CAP specification. =
The issue=20
was raised with regard to using USNG-NAD83. The unanimous consensus of =
the group=20
was that <SPAN class=3D219093817-16032004>USNG is for use at the user =
interface=20
level.&nbsp;Therefore, for&nbsp;a message protocol, such as CAP&nbsp;WGS =
84 -=20
Lat/Long is&nbsp;adequate&nbsp;and CAP spec should remain the&nbsp; way =
it is.=20
Further, by leaving CAP with WGS 84 - Lat/Long, the CAP spec remains =
more=20
international in nature and not restricted to the US market =
space.</SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>Also,&nbsp;by way of =
clarification, Dave=20
Danko (ESRI) added: </DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV><SPAN class=3D219093817-16032004><FONT face=3DArial =
color=3D#0000ff size=3D2>NAD=20
  83 vs WGS 84: Technically these are the same for mapping, charting, =
and=20
  navigation purposes. Geodetically, of course they are different but I =
think=20
  they are the same for our purposes. To keep this standard =
international we=20
  should use WGS 84. Perhaps in a users guide for the US it could be =
mentioned=20
  that NAD 83 coordinates work fine here and that NAD 83 coordinates =
could be=20
  used. However (Carl's note), this would mean that we would need some =
code to=20
  allow the receiving application to know that the coordinates are NAD =
83 and=20
  not WGS Lat/Long.</FONT></SPAN></DIV></BLOCKQUOTE>
<DIV dir=3Dltr><SPAN class=3D219093817-16032004>As we are working at an =
accuracy=20
level of many feet/meters, the geodetic differences are not=20
important.</SPAN></DIV>
<DIV dir=3Dltr><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr><SPAN class=3D219093817-16032004>We then went on to =
discuss the issue=20
of "altitude" and "ceiling" notes section.&nbsp;We<SPAN=20
class=3D219093817-16032004> think the words "per the WGS 84 datum" =
should be=20
removed.&nbsp;We think that this phrase will add communication =
confusion,=20
especially for the geographically literate.</SPAN>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>The WGS ellipsoid is a best fit =
around the=20
world and differs from MSL by varied amounts around the world. So does =
one=20
put&nbsp;a value here,&nbsp;including/excluding the delta from&nbsp;the =
WGS-84=20
ellipsoid,&nbsp;a&nbsp;height&nbsp;referenced to the ellipsoid? What is =
the=20
meaning of the value here? I think we should just have it from (local) =
MSL for=20
the area of interest. (With ellipsoid heights there is a danger of =
having to=20
provide negative values for areas above sea level). </SPAN><SPAN=20
class=3D219093817-16032004>This would be plenty specific for the =
purposes intended=20
for this standard. </SPAN><SPAN class=3D219093817-16032004>Perhaps this =
should be=20
corrected in a future version of the standard.</SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>Discussion Item 2: </SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>Rex brought up a discussion on the =
fact that=20
the Web3D consortium (geoVRML) is looking at doing more with spatial =
within the=20
portrayal domain. This can be seen on their web page. Rex said he would =
try to=20
find out more information as to what they are actually trying to=20
do.</SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>Discussion item 3:</SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>ISO MPEG4 - Looking at streaming =
of=20
geo-visualization in the mobile world. There may be IP and royalty =
issues=20
here.</SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>From the MPEG Standards Org=20
site:</SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D219093817-16032004>
<P class=3Dbody align=3Djustify>MPEG-4 is an ISO/IEC standard developed =
by MPEG=20
(Moving Picture Experts Group), the committee that also developed the =
Emmy Award=20
winning standards known as MPEG-1 and MPEG-2. These standards made =
interactive=20
video on CD-ROM and Digital Television possible. MPEG-4 is the result of =
another=20
international effort involving hundreds of researchers and engineers =
from all=20
over the world. MPEG-4, whose formal ISO/IEC designation is ISO/IEC =
14496, was=20
finalized in October 1998 and became an International Standard in the =
first=20
months of 1999. The fully backward compatible extensions under the title =
of=20
MPEG-4 Version 2 were frozen at the end of 1999, to acquire the formal=20
International Standard Status early in 2000. Some work, on extensions in =

specific domains, is still in progress. </P>
<P class=3Dbody align=3Djustify>MPEG-4 builds on the proven success of =
three fields:=20

<UL class=3Dbody>
  <LI>Digital television;=20
  <LI>Interactive graphics applications (synthetic content);=20
  <LI>Interactive multimedia (World Wide Web, distribution of and access =
to=20
  content) </LI></UL>
<P class=3Dbody>MPEG-4 provides the standardized technological elements =
enabling=20
the integration of the production, distribution and content access =
paradigms of=20
the three fields. </P>
<P class=3Dbody align=3Djustify>More information about MPEG-4 can be =
found at MPEG's=20
home page (case sensitive): <A class=3Dl2=20
href=3D"http://www.m4if.org/mpeg4/www.chiariglione.org/mpeg/";>http://mpeg=
.telecomitalialab.com</A>=20
. This web page contains links to a wealth of information about MPEG, =
including=20
much about MPEG-4, many publicly available documents, several lists of=20
"Frequently Asked Questions" and links to other MPEG-4 web pages. The =
standard=20
can be bought from ISO, send mail to <A class=3Dl2=20
href=3D"mailto:sales@iso.ch";>sales@iso.ch</A>. Notably, the complete =
software for=20
MPEG-4 version 1 can be bought on a CD ROM, for 56 Swiss Francs. It can =
also be=20
downloaded for free from ISO=92s website: <A class=3Dl2=20
href=3D"http://www.iso.ch/ittf";>www.iso.ch/ittf</A> - look under =
publicly=20
available standards and then for "14496-5". This software is free of =
copyright=20
restrictions when used for implementing MPEG-4 compliant technology. =
(This does=20
not mean that the software is free of patents. </P></SPAN></DIV>
<DIV><SPAN class=3D219093817-16032004></SPAN>&nbsp;</DIV>
<DIV><SPAN=20
class=3D219093817-16032004></SPAN>&nbsp;</DIV></SPAN></DIV></SPAN></BODY>=
</HTML>

------=_NextPart_000_009C_01C4101B.6A5A9820--



[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]