[Mp4-tech] about H.264/AVC standard document

=?big5?B?TGkuTWcgW6f1slHB4l0=?= mg-li prolific.com.tw
Fri Mar 18 10:08:49 ESTEDT 2005


Dear experts, 
    I'm also confused about the case of MacroBlock to Slice group of 8.2.2.8 in ITU-T H.264 (2003/05) version.
    8.2.2.8:
    "Otherwise (frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is
     equal to 0), the macroblock to slice group map is specified by:
    MbToSliceGroupMap[ i ] = mapUnitToSliceGroupMap[ ( i / ( 2 * PicWidthInMbs ) ) * PicWidthInMbs
    + ( i % PicWidthInMbs ) ]"
    when parameter : frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is
     equal to 0 --> it means this is a coded frame with all the MacroBlocks are field MarcoBlocks ?
BR,
MG Li
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[Mp4-tech] about H.264/AVC standard document
Gary Sullivan garysull <mailto:mp4-tech%40lists.mpegif.org?Subject=%5BMp4-tech%5D%20about%20H.264/AVC%20standard%20document&In-Reply-To=>  windows.microsoft.com 
Mon Jan 24 09:24:36 ESTEDT 2005 
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With field_pic_flag equal to 0 and mb-aff turned off, I think you're talking about an ordinary frame.
BTW you should get ahold of something more recent than G050r1.  That's from several iterations ago.
-G.
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        Subject: [Mp4-tech] about H.264/AVC standard document
        hello,experts:
            In h.264/AVC standard document(JVT-G050r1,Page 86) there is a paragraph about FMO decoding:
            "Otherwise (frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal     to 0 and field_pic_flag is equal to 0), the macroblock to slice group map is specified     by:
            MbToSliceGroupMap[ i ] = mapUnitToSliceGroupMap[ ( i / ( 2 * PicWidthInMbs ) ) *         PicWidthInMbs + ( i % PicWidthInMbs ) ]                  (8-27)"
             who can tell me what's the picture type(frame or field or others) if "frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0"?
             thanks!
             ronggang
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