What is TBC?

[jthompson99]

I am new to capturing video and looking at getting a new VCR. I can't decide if getting a s-video VCR is better than a standard RCA one. Someone mentioned that TBC is the way to go. What exactly is TBC?

Thanks.

[txpharoah]

Time Base Corrector
https://www.videohelp.com/glossary#Time%20Base%20Corrector

The dataVideo TBC-1000 is regarded as on of the best, within an affordable range.

[fmctm1sw]

https://www.videohelp.com/forum/viewtopic.php?t=167262

[dcsos]

In case anyone clicking here wanted to know quickly
TIME BASE CORRECTOR=TBC

does just that..
If there are frames or lines of video missing from an analog tape* recording, this device does the job of ON THE FLY correction of the signal
Most use the tact of PRESEVEING the last good frame or line and replacing the bad signal with a new one that now comes out of the TBC at the exact frame rate (30FPS for NTSC)]

* due to stretching baking or abuse

The best TBC's have a full frame of correction..the cheapest only correct a few lines at a time..(the expensive ones usually have a freeze frame or timed stobe frame option, too!)

[The village idiot]

Most use the tact of PRESEVEING the last good frame or line and replacing the bad signal with a new one

Actually, that would be called Drop Out Compensation --- DOC --- and doesn't normally happen with just a plain old TBC.

[dcsos]

Hey Idiot

I beg to differ..
the original poster probably couldn't care a whit... but the drop out compensator preceeded the TBC in invention..and is in fact a less powerful solution for analog tape defects

Not to say you don't need a DOC or Drop Out Compensator
The first ones were simply a feedback circuit to the capstan (early VIDEO MACHINES were reel to reel before cassetes took over)
So an error detected by the AMPEX DOC in 1955 was fixed by jockeying the TAPES speed in real time so quickly you never saw a dropout.
All VIDETAPE recorders now feature this drop out compensator that now removes problem areas of the frame thru delay line technology and no longer speed adjustment.

ON the other hand the time base corrector (TBC) was invented in the early 70's by CVS video (they won an emmy for it in 1973)
and was a COMPUTER development wherin a LINE of video was actually stored in the thing until a bad line came along, and it was replaced with the version on hold in the box's memeory
The first full frame TBC that could TIME IN A SATTELITE BROADCAST or remote feed from FAR AWAY was twenty thousand dollars by 1977.
Adda Corp and Microtime were early makes of TBC's that could correct anything by saving a frame in memory ..ready to be clocked out of the box at the required frame rate..at a cost that went down to 500 for a full frame in the late 90's

A frame of memory took 5 RACK-UNITS in 1978
Now its on a chip

[The village idiot]

We still use old Microtimes at work the Addas are a distant memory

Mmmmm.... Quad tape

And my point on DOC is that most TBC only machines do not have DOC. As in the TBC-100(0) doesn't fill in any missing info with info from the previous or next line. You just get a gray (or white/black) spot for the missing info.