Yesterday a friend brought to my home an old Samsung DVD-R131 DVD recorder... "it doesn't read any disc, try if you could fix it; it's yours now, anyway!"

Another DVD recorder, broken too... what I have to do with it? Thinking to throw it away without even try to clean/fix/test it, suddenly the idea bulb lighted up... "what if..."

So, I googled a bit, found it has a Techwell' TW9906 comb filte; from the paper:

The built-in three high quality 10-bit analog-to-digital converters (ADCs) convert inputs into digital signals for processing.

The TW9906 uses proprietary adaptive 4H comb filter for chroma and luma separation to achieve high video quality. The image enhancement includes horizontal and vertical peaking, CTI and BCS control.

The advanced synchronization processing can produce stable pictures for non-standard signal such as those produced by VCR trick mode.

The high quality scaler uses multi-tap poly-phase decimation filter to accurately scale down the image with minimum phase error. It can be programmed to scale-down the output picture to an arbitrary ratio with cropping.

The TW9906 supports flexible pixel interface. It outputs YCbCr (4:2:2) data stream over 10-bit or 20-bit data path. It also supports both free-running clock and line- locked clock output.

So what you guys think about it? Is the "adaptive 4H comb filter" = 4-lines comb filter?

Now I'm too involved in too many projects, but I'll manage to test it, sooner or later - maybe it could solve some laserdisc capture chroma problems!