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happycube
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Post subject: Re: LD-X1 composite problem Posted: 04 Dec 2014, 18:09 |
Absolute fan |
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Joined: 18 Apr 2012, 18:02 Posts: 1614 Location: United States Has thanked: 71 times Been thanked: 88 times
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Yeah To avoid that you either have to go low-end (a composite output-only player) or later high-end (one with a 3D comb filter) - most Pioneer players used a 2D comb filter. I forget if the typical Sony 2D one is adaptive, which would make it less obvious.
_________________ Happycube Labs: Where the past is being re-made, today. [meep!]
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happycube
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Post subject: Re: LD-X1 composite problem Posted: 06 Dec 2014, 18:53 |
Absolute fan |
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Joined: 18 Apr 2012, 18:02 Posts: 1614 Location: United States Has thanked: 71 times Been thanked: 88 times
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I'd argue the S2 is doing too much digital processing, since the comb filter is digital What I'm seeing there is definitely a comb filter artifact. It was designed before LD mastering got wider color bandwidth - for pre-WEA/SuperNTSC era disks it's probably superb. Unfortunately I don't see any way to turn it all off - there are both digital and analog NR stages afterwards and none of those would work without comb filtering. The S2 circuitry is designed to avoid the digital look by high frequency (4fsc) capturing and not having to encode the sync signal (-40IRE) as part of the capture range, effectively giving it a 9-bit digital chain. All the later players have 4fsc capture, but many do not break out the much lower sync signal. And yup, that's how you would tap it. Not all TBC circuits can deal with it, but there's gotta be something out there that can. The results are going to have a very different feel - a lot sharper (2D combs remove that) and at least a bit noisier. If you have stuff to deal with digital data (unlikely, alas, only Glimmie over on AVS has done this), the tap point would be between IC12 and IC13 on the VSMB assembly, which is right before the Y/C sep. OTOH, it's far easier to just use the S-Video and enjoy watching movies! (especially the pre-92ish ones the X1/S2 is born to play )
_________________ Happycube Labs: Where the past is being re-made, today. [meep!]
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