[CW] 25 WPM Sending

[Richard Knoppow]

    A general note, not about these particular viedos but about 
all digital video: The sound is often out of synch with the 
picture because of the digital processing. This was a great 
problem at the TV network I worked for. We had a special 
adjustable delay for equalizing them on the optical lines mostly 
used for program distribution. We had a test signal and an 
indicator for getting the two in synch. On occasion they would be 
so far out that the equalizer was beyond its range. It appears 
that material on You Tube can have very large timing errors. One 
sees this on some movies which have "lip flap" the result of 
several frames of mis timing. The same sort of thing could happen 
with movies on film if the projector was not threaded correctly 
and I have seen TV prints where the sound track was printed with 
an offset. In any case the point is that the appearance that the 
sound is out of synch with the image does not mean its a fake, it 
may just be accumulated timing error. There are probably computer 
applications that can correct it. Perhaps someone on this list 
has such an application and can try it on a suspect video to see 
if it fixes the problem.

On 8/27/2020 8:40 AM, D.J.J. Ring, Jr. wrote:
> On Facebook Radio-Officers group we've had a bunch of videos 
> that some said were fakes because of synchronization between 
> audio and video and just general disbelief.  I forwarded the 
> links to R/O Ray from Hong Kong and asked him if they were 
> real, he said they were and added that they appeared to look 
> like they had been trained by China military because of the 
> method that they used to send.
>
> Here's another addition to the submissions. For years I 
> searched for something like this and now I have multiple examples.
>
> Ignore the message if you find it of no interest.
>
> https://youtu.be/PDnAQVa6wjM <https://youtu.be/PDnAQVa6wjM>
>
> 73
>
> DR
>
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> =30=

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL