VHS transfer usage of TBC & frame sync combo?
I'm tasked with transferring about 175 VHS and Hi8 tapes of first gen content to digital using my trusty Hauppauge 1265 card. I don't have a fancy SVHS VTR to use, but I do have a decent higher end JVC VHS/DVD recorder. It has S-video and composite RCA outputs from the VHS side. No mention of it having an internal line TBC. But for capturing, frame sync seems higher priority than image clean-up to keep a capture card happy. There's a DPS-220 TBC/Frame Sync available locally that apparently can be used in TBC mode or Sync mode (frame sync, I'm assuming) via a front panel switch. I can also get a For.A FA-300 TBC locally for image cleanup (says it also has DOC feature - does that require an external device's assistance?). I'm aware that these pizza box broadcast pieces can have worn out caps, and I can recap the things if necessary.
I got an idea to try this equipment flow: VCR -> DPS-220 in "sync" mode -> FA-300 TBC -> Hauppauge HVR-1265 Would this combo of two TBCs (DPS in Sync mode) achieve the desired frame sync to please the capture card AND do a little image correction with the For.A? And, is an external genlock piece needed for multiple devices if there is only one initial video input? Thanks for any suggestions. Glad to finally join here - and the info on this forum has helped tremendously with past projects. |
TBC's don't cleanup the image, they fix timing errors. Line TBC and DNR inside a VCR do cleanup the image which your VCR lacks. You don't want the FA-300 anyway, it samples at 8 bit 4:1:1 bellow capturing standards. But both are frame synchronizers and you will have 4 times the conversion from analog to digital and vise versa, not good.
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Gen lock and Frame Sync are used to bring two separate sources such as cameras and VTR outputs to a common time base, and not needed with one source. An external TBC generally is often needed with analog tape, and only one is needed. Putting two in series adds no benefit and could cause problems.
If they are available locally to you see if you could give them a test before you buy. |
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Lots of consumer-end VHS JVC VCRs are really bad. Only the pro/prosumer decks are good. Very similar to Panasonic: junk consumer decks, nice pro decks. Quote:
- Line/frield TBC mostly cleans the visuals/image, some signal cleaning. - Frame TBC mostly cleans the signal, some visual/image cleaning. - You need both. Quote:
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VHS conversion has a recipe: VCR/camera > TBC > capture card But not any VCR, any camera, any TBC, any captures card. Specific models know for quality, which have the features needed to do a quality. (Not just "quality" either, but a job at all. The wrong gear = no conversion whatsoever.) Better gear = less headaches. Whatever money you think you'll save will be spent in lost time. Lots of people just give up, because it's not cooperating with their cheap gear. Quote:
TBCs fix timing errors. - The byproduct of line/field based correction = image cleaning. - The byproduct of frame is signal correction, which thus appease capture cards. - And again, you need both. Quote:
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That refers ONLY to like TBC (frame>frame, or line>line) and NOT complementary (line>frame) Quote:
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