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OpasanNekiLik
8th June 2011, 22:28
I found somewhere that new MPEG4 supports the following functionalities:

Object-based video coding
* Binary shape coding
* α-map shape coding
* Padding for block-based DCT of texture
* Shape-adaptive DCT
DWT for still texture coding
Mesh animation, face and body animation

Could somebody explain to me each of these functionalities and tell how widely these functionalities are imlemented in reality?
Selur
10th June 2011, 13:26
afaik there's no implementation that includes 'Object-based video coding'
LoRd_MuldeR
10th June 2011, 15:03
What do you mean with "new" MPEG-4? Or more precisely, what part of MPEG-4 you are referring to?

MPEG-4 is a quite huge standard, which includes "Part-2: Visual" (known for it's "Advanced Simple Profile", as implemented by DivX/Xvid) as well as "Part-10: Advanced Video Coding" (better known as "H.264").

It also includes "Part-3: Audio" (e.g. Advanced Audio Coding) and "Part-14: MPEG-4 File Format" (i.e. the MP4 container). None of these are very "new" at this time though...
Shevach
13th June 2011, 10:31
In my opinion only Advanced Simple Profile is moderately used in video broadcasting. Due to problems in HW implementation no_of_sprite_warping_points is restricted to 1 or 0 (GMC mode).
Blue_MiSfit
13th June 2011, 23:05
As far as I know, ASP is never used in broadcasting. AVC is quite commonly used these days though.

Derek
Shevach
14th June 2011, 08:19
As far as I know, ASP is never used in broadcasting. AVC is quite commonly used these days though.

Derek

You are right. For example DVB does not support MPEG4 (as far as I know).
I incorrectly interpreted the notion 'broadcasting'. I included also Internet streaming in addition to satellite and cable video broadcasting.
Blue_MiSfit
15th June 2011, 21:48
DVB-S2 does support MPEG-4 AVC, as does DVB-T2 and DVB-C2 :)

No ASP though. The only widespread use of ASP these days is in piracy, as far as I know... Well, technically HDCAM-SR is a variant of MPEG-4 (Studio Profile), but that's kind of its own thing..

Derek
nm
16th June 2011, 01:08
DVB-S2 does support MPEG-4 AVC, as does DVB-T2 and DVB-C2 :)

And even the older non-2 standards allow AVC, which is also used in many countries for both SD and HD broadcasts.
Blue_MiSfit
16th June 2011, 02:29
That's news to me! Thanks for the info :)
smok3
16th June 2011, 08:58
yep, AVC here in DVB-T, dunno about DVB-C.