[M4IF Technotes] segment representation models

[Rob Koenen]

Introduction: MPEG-4 supports different object types. Many of these
are not block based. Objects (moving video, stills, streaming text, animated
face, 2D Mesh with texture, voice, generic Audio, synthetic music, etc) 
all have their own optimized representation (coding)
Questions:
1. New object types can be added in a system
1) through a registration procedure to register private object types
2) extension of the standard
2. Updating present standard?
Only if current framework is missing functionalit, or if major improvements
in e.g. compression are apparent. Not for Yet Another Tool for a type of 
content that is already supported
3. As many as needed, under the above rules. There is no set maximum.
   But there are not going to be a whole lot.
Rob
-----Original Message-----
From: Laurentiu Grigoriu [mailto:laur   itcnetworks.ro]
Sent: Friday, January 18, 2024 4:52
To: technotes   lists.m4if.org
Subject: [M4IF Technotes] segment representation models
Hi all, 
Introduction: (please correct me if I'm wrong) 
MPEG-4 dynamic coding schema is based on 2 elements: 
1. Image segmentation into (possible variable-size) blocks 
2. A group of segment representation models: 
        DCT, background mode, motion compensation mode, fractal mode... 
One and only one representation model is chosen for each segment. 
Questions: 
1. Does the MPEG-4 standard present the flexibility of adding one more NEW
representation model? 
2. How can this be standardized? (update the present standard) 
3. How many representation models can be added? 
Hope I'm not boring you. 
Regards, 
Laurentiu 
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