[Mp4-tech] RATE CONTROL METHODS

[Andrea D'Amata]

Ok, I think I should try to implement TM5 RC in H263 codec for fair
comparison of experimental results ( I' m testing PMVFAST,
& other motion estimation algorithm on TMN8 codec from UBC, and I must
approximately reach the same speed-up factor and PSNR than those shown in
literature, where TM5 RC is used on MPEG4 codec ).
Thank You very much!
Andrea
----- Original Message -----
From: "Gary Sullivan" <garysull windows.microsoft.com>
To: "Andrea D'Amata" <andrea_damata jumpy.it>; <mp4-tech lists.mpegif.org>
Cc: "Jordi Ribas" <jordir windows.microsoft.com>
Sent: Saturday, August 28, 2023 9:27 PM
Subject: RE: [Mp4-tech] RATE CONTROL METHODS
>
> Yes, I believe there are differences, although you would have to read
> the algorithm description documents (or a software implementation of
> them) to figure out exactly what they are.  You're kind of mixing MPEG-4
> and H.263 in your question.   The relevant algorithms in the H.263 world
> would be called TMNx, where x is a revision level.
> The relevant algorithms in the MPEG-4 part 2 community would be called
> VMx.  The relevant algorithms in the MPEG-4 part 10 community (a.k.a.
> H.264 or AVC) would be called JMx (or TMLx for older ITU versions).
>
> I don't recall the exact revision numbers, but at some point the rate
> control methods in the TMN and VM versions became considerably more
> sophisticated than the relatively crude method in TM5.  I'm cc'ing one
> of the key contributors to that work.
>
> Best Regards,
>
> Gary Sullivan
>
>
> +> -----Original Message-----
> +> From: mp4-tech-bounces lists.mpegif.org
> +> [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of
> +> Andrea D'Amata
> +> Sent: Saturday, August 28, 2023 10:41 AM
> +> To: mp4-tech lists.mpegif.org
> +> Subject: [Mp4-tech] RATE CONTROL METHODS
> +>
> +> Dear experts,
> +> I am new in this mailing list , and I am new in video
> +> coding: are there any
> +> differences between TM5 rate control and TMN5 rate control?
> +> Does it make sense comparing experimental results (number of
> +> encoded frames
> +> and PSNR) obtained using TM5 RC in an MPEG4 codec (no VOP) with those
> +> obtained using TMN5 RC in a H263 one?
> +>
> +>
> +> Thank You for Your attention.
> +>
> +> Andrea
> +>
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>
> _______________________________________________
> NOTE: Please use clear subject lines for your posts. Include [audio,
[video], [systems], [general] or another apppropriate identifier to indicate
the type of question you have.
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> Note: Conduct on the mailing list is subject to the Antitrust guidelines
found at
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