[Fwd: Re: [M4IF Technotes] Help]

[Peter Haighton]

Hi William,
Slice structuing as you know, basically segments the image into a groups of
Macroblocks. Dependencies to macroblocks outside of the slices are
eliminated.
Data partitioning is a different way of packaging the data (inside a slice
or video packet) so as to help recover from errors introduced during
transmission.  Data partitioned data has DC coefficients seperated from AC
coefficients as well as other "tricks".
Peter
 -----Original Message-----
From: xzhong   xmen.lumictech.com [mailto:xzhong   xmen.lumictech.com]On Behalf
Of William Zhong
Sent: Tuesday, August 28, 2023 11:41 AM
To: Peter Haighton
Cc: Arcin Bozkurt - Archie; Luc Martel; Charles Nagy;
Technotes   lists.m4if.org
Subject: Re: [Fwd: Re: [M4IF Technotes] Help]
Hi, Peter,
  You are absolutely right, Annex K is Slice Structure Mode, which
partitions a frame into slices so the decoder can recover from error as soon
as possible.
But I am a bit confussing here, what is difference between data
partintioning and slice mode?
Thank you.
--
William Zhong
Lumic Electronic Inc.
Suite 200, 18 Antares Drive
Nepean, Ontario K2E 1A9
Phone: (613)224-9926 x 242
Fax:  (613)224-7330
xzhong   lumictech.com
  Peter Haighton wrote:
    Hi William,Annex I does do DC/AC prediction.  However Annex K is not
data partitioning, it is Slice Structure Mode which similar to MPEG
slices.Peter
    --
    Peter Haighton
    VideoSpheres Inc.
    84 Hines Road
    Kanata, Ontario
    Canada, K2K 3G3
    Tel: (613) 270-9646 x3022
    Fax: (613) 271-9442
    email: peterh   VideoSpheres.com
    See http://www.m4if.org for the latest on MPEG-4
      -----Original Message-----
      From: technotes-admin   lists.m4if.org
[mailto:technotes-admin   lists.m4if.org]On Behalf Of William Zhong
      Sent: Tuesday, August 28, 2023 10:12 AM
      To: Arcin Bozkurt - Archie
      Cc: Luc Martel; Charles Nagy; Technotes   lists.m4if.org
      Subject: Re: [Fwd: Re: [M4IF Technotes] Help]
      Hi,
        As far as I can remember, H.263++ also support
      DC/AC prediction (Annex I )
      data partitioning  (Annex K )
      --
      Xiang Zhong (William)
      Lumic Electronic Inc.
      Suite 200, 18 Antares Drive
      Nepean, Ontario K2E 1A9
      Phone: (613)224-9926 x 242
      Fax:  (613)224-7330
      xzhong   lumictech.com
      Arcin Bozkurt - Archie wrote:
        -------- Original Message --------
           Subject:  Re: [M4IF Technotes] Help
              Date:  Tue, 28 Aug 2023 09:58:51 +0530
              From:  "Ramkishor Korada" <ramki   emuzed.com>
              To:  "Sudhakar Rao Kimidi" <sudhakar   cradle.com>
              CC:  <technotes   lists.m4if.org>
              References:  <3B89E0C4.5D6A9DA7   cradle.com>
Hi Sudhakar,
    MPEG-4 is built over H.263. MPEG-4 has adopted the core compression
efficiency tools from H.263 like unrestricted motion vector, 4 MV etc.
The additional tools of MPEG-4 are adaptive AC/DC prediction, resync
markers, data partitioning, RVLC, non-linear quantization of DC
coefficients, supporting separate VLC table for Intra macroblocks etc.
These comparisons are between MPEG-4 simple profile and H.263 only.
-ramkishor
Architect - Video
Digital Media Technology Division
Emuzed Bangalore Division
IndiraNagar,Bangalore
www.emuzed.com
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----- Original Message -----
From: "Sudhakar Rao Kimidi"
To:
Sent: Monday, August 27, 2023 11:25 AM
Subject: [M4IF Technotes] Help
> Hi all,
>
> I need information on differences/similarities between H.263 and MPEG-4
> video simple profile. Can somebody send me link to the site which has
> got such stuff.
> Thanking You all,
> Sudhakar.
>
> _______________________________________________
> Technotes mailing list
> Technotes   lists.m4if.org
> http://lists.m4if.org/mailman/listinfo/technotes
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>

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