One should add ARMv7 (e.g. Cortex-A8) with 128bit Neon SIMD. These PowerPC CPUs doesn't have instruction set for SIMD.
PowerPC has a pretty decent SIMD instruction set called Altivec. It's better to build the next OS4 machine with a cpu that supports VMX/Altivec than using foreign cpus :-)
The old DCTV used a compression similar to YUV, the amiga played a normal animation with not many bitplanes fullscreen from HD without problems and the nice DCTV converted the output to lots of colours. YUV modes already exist in most of graphic cards and is a similar idea to the DCTV. HAM is also a compression method.
Was the content MPEG (VCD) based?
It wasn't and it didn't need to be. It used just a few bitplanes. You could use any method you wanted to compress the animation. The DCTV would interpret the output and show the right colours.
I remember my Amiga 3000/030@25Mhz barely decode MP3 in real time, let alone VCD MPEG.
Why use crap looking MPEG full of artifacts when you could show a nice and clean animation without artifacts? :-)
