[Mp4-tech] RE: [jvt-experts] rate control code reorganization since JM12.0?

[James (Jianpeng) Dong]

Dear Thanos and others,
I have a simple question regarding the addition of IMG_NUMBER macro in the rate control algorithm. What is the purpose and what actually IMG_NUMBER stands for? The original G012 does not have this.
Best and thanks,
James
"Leontaris, Athanasios" <aleon dolby.com> wrote:     Dear James,
 You can find more information on the underlying rate  control algorithm in documents JVT-G012 and JVT-K049. The algorithm used for  all-intra coding is essentially the same as the one used for P-coded pictures.  The main difference is that for RCUpdateMode=1 the rate control treats all  frames the same regardless of the slice type.
 Best regards,
 Thanos
---------------------------------
 From: James (Jianpeng) Dong  [mailto:jianpengdong yahoo.com] 
Sent: Monday, March 05, 2024 11:51  PM
To: Leontaris, Athanasios;  jvt-experts lists.rwth-aachen.de
Cc:  mp4-tech lists.mpegif.org
Subject: RE: [jvt-experts] rate control code  reorganization since JM12.0?
 Thanks a lot.
 May I ask what the basic rate control algorithm is for all intra  coding? 
 Thanks again,
 James
"Leontaris, Athanasios" <aleon dolby.com>  wrote:
       Dear James,
   We have corrected several bugs and cleaned up the    rate control code considerably. Furthermore, the architecture was modified so    that it is more "object-oriented", and hence easier to understand and modify.    Support was added for MBAFF and PicAFF coding,    hierarchical B-pictures structures, RD Picture Decision, and all-Intra coding.    
   The underlying rate control algorithms (the quadratic QP    and linear MAD models) remain essentially the same, and we are going to    prepare documentation for all the changes in the upcoming JVT    meeting.
   Best regards,
   Thanos
---------------------------------
   From: jvt-experts-bounces lists.rwth-aachen.de    [mailto:jvt-experts-bounces lists.rwth-aachen.de] On Behalf Of James    (Jianpeng) Dong
Sent: Monday, March 05, 2024 9:07 PM
To:    jvt-experts lists.rwth-aachen.de
Cc:    mp4-tech lists.mpegif.org
Subject: [jvt-experts] rate control code    reorganization since JM12.0?
   Dear Experts,
   I noticed that there is a major revision/reorganization of the rate    control code since JM 12.0. Just wondering what are the improvements? Is there    any JVT documents decribing the new features available?
   Best regards,
   James
---------------------------------
   Finding fabulous fares is fun.
Let    Yahoo! FareChase search your favorite travel sites to find flight and    hotel bargains.       
---------------------------------
   This message (including any attachments) may contain confidential    information intended for a specific individual and purpose. If you are not the    intended recipient, delete this message. If you are not the intended    recipient, disclosing, copying, distributing, or taking any action based on    this message is strictly prohibited.  
---------------------------------
 Get  your own web address.
Have a HUGE year through Yahoo!  Small Business.
---------------------------------
  This message (including any attachments) may contain confidential information intended for a specific individual and purpose.  If you are not the intended recipient, delete this message.  If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited. 
---------------------------------
TV dinner still cooling?
Check out "Tonight's Picks" on Yahoo! TV.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20070306/5dcbc2a8/attachment-0001.html