[Mp4-tech] [H.264 AVC] changes between JM 12_4 and JM_13

[Leontaris, Athanasios]

Dear Anne Sophie,
From a first look, the configuration file for JM 13 has RDOptimization enabled while it is disabled for the 12.4 version. Furthermore, some inter prediction block sizes are disabled in the 13 version. The use of rate distortion optimization, though, will often outweigh the negative effect of disallowing certain block sizes.
Best regards,
Thanasis
________________________________
From: mp4-tech-bounces lists.mpegif.org [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Anne Sophie Bacquet
Sent: Wednesday, December 19, 2023 12:42 PM
To: mp4-tech lists.mpegif.org
Subject: [Mp4-tech] [H.264 AVC] changes between JM 12_4 and JM_13
Dear experts,
I'm a french student currently working on H.264 AVC .
I generated a 1 picture-stream with JM 12_4 then with JM_13 with the same parameters, but i found different PSNRY (33.5 and 33.8).
You can find enclosed the two config files (1 frame, No other Intra prediction mode than DC,QP 30...).
Can everyone tell which change between the two version may cause this difference?
I thank you in advance.
Best Regards
Anne Sophie Bacquet
IEMN DOAE
UVHC Valencinnes
France
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