On Wednesday, August 22, 2012 11:27:54 AM UTC+1, The Natural Philosopher wrote:
Harry Bloomfield wrote:

Jethro_uk used his keyboard to write :

On Tue, 21 Aug 2012 20:51:33 +0100, Andy Burns wrote:



Ramsman wrote:



I noticed during the BBC Olympic broadcasts that the stadium clock was

about seven seconds behind my watch.



If you were in the stadium I expect the clock would have agreed with

your watch, most of the the delay if watching on digital TV will come

from compressing it before transmission and decompressing it after

receiving to display the picture.



Walking around the TV section of a large department store recently,

SWMBO noticed that the TVs all seemed to be showing the same channel

at slightly different times - some were a good second out.



That is due to the TV's internal delays in decoding the digital signal

plus maybe differences in the time the TV's were powered up (not sure on

that last).



nope. Its purely how much buffering they do on the signal. Decoding a

compressed video always takes some time, and to an extent,the more time

it takes the better a job you can do.



Our Sonyt STBS are about a second and a half out of synch with 'real

time' and the DTB adapter on this computer is more like 15 seconds.



The wifes DTB on her Mac is about 5 seconds delayed

I heard, during the Olmypic refering to Usain Bolt that it takes a human 0.1 second to respond to a sound, so that makes all clocks with sound as indication out by 100ms according to the true time, unless you use software to 'pip' 100ms beforehand the true time is reached.







--

Ineptocracy



(in-ep-toc’-ra-cy) – a system of government where the least capable to

lead are elected by the least capable of producing, and where the

members of society least likely to sustain themselves or succeed, are

rewarded with goods and services paid for by the confiscated wealth of a

diminishing number of producers.