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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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The Mysteries of Close Captioning
I know how close captioning is done,
but why does some networks (meaning CBS)has such bad captioning where words are dropped and letters are replaced by funny symbols? Ron |
#2
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The Mysteries of Close Captioning
That's usually caused by a weak signal or poor reception.
Ron wrote: I know how close captioning is done, but why does some networks (meaning CBS)has such bad captioning where words are dropped and letters are replaced by funny symbols? Ron |
#3
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The Mysteries of Close Captioning
On 11 Oct 2005 07:28:17 -0700, "Ron" wrote:
I know how close captioning is done, but why does some networks (meaning CBS)has such bad captioning where words are dropped and letters are replaced by funny symbols? Ron sometimes cause they put in new equipment or need to change the old equipment, & don't know that this happens with the captions....so I email and let them know this & they correct it. |
#4
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The Mysteries of Close Captioning
Ron:
It could be a problem at CBS or more than likely it could be a marginal signal to your television... or could be a marginal CC decoder in your tv.... Try a different TV in the same location then at a different location or a friend's TV at his home to see if you get the same results... post what you find out. electricitym .. .. |
#5
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The Mysteries of Close Captioning
CC is encoded in the vertical blanking interval, isn't it?
If you are watching a digital cable channel, or a broadcast of a digital feed, then is it possible that the errors can result from the CC information being decoded and encoded over and over? I am assuming this because digital video does not concern itself with any part of the signal that is outside the visible screen. So if the signal is ever digital, the CC data has to be decoded, stored as part of the digital stream, and then encoded again when it's translated back to analog. It could happen at your digital cable receiver, and/or at the cable station, and/or at a broadcast facility that's getting a digital satellite feed. |
#6
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The Mysteries of Close Captioning
In article .com,
Ron wrote: I know how close captioning is done, but why does some networks (meaning CBS)has such bad captioning where words are dropped and letters are replaced by funny symbols? Think this is Teletext in UK terms. Classic symptoms of poor signal level or multipath reception. Look for ghosting or noise on the main picture. -- *A backward poet writes inverse.* Dave Plowman London SW To e-mail, change noise into sound. |
#8
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The Mysteries of Close Captioning
Dave Plowman (News) wrote: Think this is Teletext in UK terms. To be pedantic, it's just page 888 of teletext really. I think it's more robust, e.g. you can record it on VHS, but it has to break somewhere... Alex |
#9
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The Mysteries of Close Captioning
Actually the signal is quite strong, and of the two televisions
that are CC equipped, both of them pick of CBS' signal and show really bad captioning. Ron |
#10
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The Mysteries of Close Captioning
In article .com,
Ron wrote: Actually the signal is quite strong, and of the two televisions that are CC equipped, both of them pick of CBS' signal and show really bad captioning. Look for signs of multipath reception. Ghosting. -- *A day without sunshine is like... night. Dave Plowman London SW To e-mail, change noise into sound. |
#11
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The Mysteries of Close Captioning
Andrew Rossmann wrote:
says... I know how close captioning is done, but why does some networks (meaning CBS)has such bad captioning where words are dropped and letters are replaced by funny symbols? CC (and other data like TEXT and XDS) information is encoded just above the very top of the picture. Sometimes, especially with HD TV's, you might see it as some thin lines moving around side to side. Any noise or distortion up there can scramble the CC. I have a two-year-old Toshiba 32A62 that gets scrambled data on ONLY ONE channel, cable channel A&E. A cheap Symphonic next to it, working from the same RF feed, gets perfect CC data on that same channel. On all other channels, when there's any garbling both sets will show identical garbling. So I have my doubts about the implementation of CC on some sets. CC can be very amusing! Commercials that say (repeatedly refreshed), "Sample caption data goes here". Program edits in commercials that retain parts of the CC from the program, parts that combine in odd ways. And it's especially fun when one commercial ends with some blurb that stays through most of the following commercial and seems to make fun of it (the data will sit there about twenty seconds if there's no signal to clear it or supersede it). -- If John McCain gets the 2008 Republican Presidential nomination, my vote for President will be a write-in for Jiang Zemin. |
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