[Mp4-tech] Ex-Golomb words longer than 32 bits

[Gary Sullivan]

Shevach Riabtsev et al,
I suggest looking at some SEI messages and perhaps VUI syntax.  In fact, there are reportedly a few cases in which the code can exceed 64 bits (pan_scan_rect_id, scene_id, snapshot_id, progressive_refinement_id etc, which have a stated range of 0 to 2^32 - 1).  I believe we will fix those few cases in a future corrigendum (by limiting them to a range from 0 to 2^32 - 2 and thus limiting them to 64 bits in length).
Best Regards,
Gary Sullivan
________________________________
From: mp4-tech-bounces lists.mpegif.org [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Shevach Riabtsev
Sent: Monday, May 07, 2024 8:08 AM
To: mp4-tech lists.mpegif.org
Subject: [Mp4-tech] Ex-Golomb words longer than 32 bits
Hi Daljit
Could you elaborate under what circumstances Exp-Golomb codes in H.264 would exceed 32 bits. 
The only syntax element I have observed that gets a  "huge" value is mb_skip_run in a HD resolution picture, say 8159. 
In this case, mb_skip_run Exp-Golomb code length is  25 bits. 
Regards, Shevach
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