[MPlayer-dev-eng] Re: ccache

[Tobias Diedrich]

Arpi wrote:

> (and also see www.100fps.com, unrelated to ccache, but it had new infos
> about deinterlacing even for me)

Hmm, looks like there is also a lot of slightly incorrect information on that
site:

1)
The Timeline of an Analog VCR/Camcorder is no different from a digital
VCR/Camcorder. Only the storage format differs.

2)
It is not possible to capture fields with higher vertical resolution
than 288 scanlines (PAL) because only 288 scanlines are transmitted
in the video signal. So the digitizers we have are already doing the
best that can be done. (Well, maybe they are a bit on the noisy side,
at least my Hauppauge is...)

3)
The "color interlacing" can happen if an YUV411 Signal is converted to RGB
or vice versa. You have to use different algorithms for interlaced and
progressive material. For progressive material the first UV-Line
contains color information for Y-Line 1+2, for interlaced material it is
for Y-Line 1+3.

4)
Blending does not leave the sharpness intact.

5)
Area based, Motion blur -> Different adaptive deinterlacing Methods
Blending Fields and Discarding Fields are closely related.
With both you half the vertical resolution and scale it back up.

6)
PAL vs. NTSC:
PAL has a slightly higher luma resolution, but a halfed chroma
resolution because of the Phase Alternating Line Color Encoding.
IIRC NTSC is information wise comparable to YUV422 while PAL carries
only as much information as an YUV411 picture...

7)
The best deinterlacing method is not deinterlacing at all. I'd like to
have a player that can display 25interlaced as 50progressive by filling
the even/odd lines for the odd/even fields with black lines, just the
way it works in your Television set. :-)
(Well the lower afterglow of the Monitor might be problematic, I
think filling the missing lines with the last frame in 1/2 or 1/4 the
brightness might compensate for that)

-- 
Tobias								PGP: 0x9AC7E0BC
This mail is made of 100% recycled bits
Now playing: Hirasawa Susumu: Siren 01 - denkouyoku
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