[Fwd: Re: [M4IF Technotes] Help]

[G Chandra Sekhar Reddy]

Hi,
DataPartitioning is a way arrangement of data within one VideoPacket.
Slice structure is just like Video-Packets in MPEG-4.
We have the similar structures in H.261, H.263, MPEG-1, MPEG-2, MPEG-4.
But, DataPartitioning is identifying groups of important data (with which we can reconstruct the MacroBlock reasonably partially with one partition itself) within one structure like this (in MPEG-4, this is VideoPacket), and grouping these data into partitions. Like, in one Video Packet, all MacroBlocks Headers into one partition, all DCT-data into another partition.
According to the standard, we have 3-partitions.
Chandra
  ----- Original Message ----- 
  From: William Zhong 
  To: Peter Haighton 
  Cc: Arcin Bozkurt - Archie ; Luc Martel ; Charles Nagy ; Technotes   lists.m4if.org 
  Sent: Tuesday, August 28, 2023 9:10 PM
  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
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>

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