[M4IF Technotes] Predictive Motion Coding (was Re: MPEG-4 Books)

[Gaurav Aggarwal]

Dear all,
I am trying to implement SP/ASP and recently got The MPEG-4 Book for
a better understanding of the same. Since I am not decoding arbitrary
shapes, I was skimming over Section 8.3 "Coding of Arbitrarily Shaped
Video Objects" when I noticed that Section 8.3.3.2 Predictive Motion
Vector Coding comes under Section 8.3.3 "Coding of Boundary MBs". 
Isn't predictive motion vector coding to be used even for rectangular
VOPs, i.e., always for SP/ASP?? Am I missing something quite basic
here?
Also, can I treat the video_packet to be equivalent to the Slice 
concept in MPEG-2? What are the essential differences?
Further, for direct mode motion compensation in B-VOPs, we need to 
do the TRB/TRD division. Isn't that going to be a little tough for
silicon solutions where division isnt available. Has anyone given a
thought to workarounds??
Thanks much!!!
Gaurav
> -----Original Message-----
> From: Ben Waggoner
> Sent: Wednesday, September 04, 2023 3:44 AM
> Subject: [M4IF Technotes] MPEG-4 Books
> 
> 
> (Rob Koenen asked me to copy this over from the Streaming Media 
> MPEG-4 list)
> 
> Folks,
> 
>     There are a number of books about and discussing MPEG-4 out now.
> 
>     I got the "The MPEG-4 Book" edited by Fernando Pereira and Touradj
> Ebrahimi last week.  It is quite good, and definitely the first 
> truly useful
> reference on MPEG-4.  Finally, an actual document which covers all the
> tools, profiles, and levels used in the myriad facets of the MPEG-4
> standard!  Compared to the standard itself, it's much more readable and
> much, much cheaper.  The book also has an interesting overview of 
> the MPEG-4 standards process, and information on verification.
	
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