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<blockquote data-quote="PaulR" data-source="post: 864284" data-attributes="member: 176256">This is a good a place as any.&nbsp;There are multiple reasons for the delay.&nbsp;First.&nbsp; Compression of an analogue signal to digital takes a small amount of time.&nbsp; More time is needed for video than audio which is why there is a small, but noticeable, difference between speach and the movement of lips in live broadcasts.&nbsp; This is especially noticeable when there is another live link to an outside broadcast showing on screen behind the presenter, the distant reporter will have a noticeable disconnection between sound and vision.&nbsp;Second.&nbsp; It takes about half a second for the signal to make the journey to satellite and then back again to earth.&nbsp; It may make the trip more than once - if you are watching a programme which is from a region within the country then it may have been uplinked and then down to the regional office before being uplinked again.&nbsp;Third.&nbsp; Digital TVs take a litle while to process the signal from digital back to analogue.&nbsp;Fourth.&nbsp; If you are using a PVR (personal video recorder) which buffers the signal to the hard disc to allow you instant pause of live programmes then this will also introduce a delay as the the signal has to be read from the disc before being passed to the TV.&nbsp;There may be more reasons and I am surprised that the difference for you is as much as 20 seconds.&nbsp; Another possible cause would be if the&nbsp; Internet is used as a link somewhere.&nbsp; This can add another 4 -5 seconds with ease.</blockquote>

[QUOTE="PaulR, post: 864284, member: 176256"] This is a good a place as any. There are multiple reasons for the delay. First. Compression of an analogue signal to digital takes a small amount of time. More time is needed for video than audio which is why there is a small, but noticeable, difference between speach and the movement of lips in live broadcasts. This is especially noticeable when there is another live link to an outside broadcast showing on screen behind the presenter, the distant reporter will have a noticeable disconnection between sound and vision. Second. It takes about half a second for the signal to make the journey to satellite and then back again to earth. It may make the trip more than once - if you are watching a programme which is from a region within the country then it may have been uplinked and then down to the regional office before being uplinked again. Third. Digital TVs take a litle while to process the signal from digital back to analogue. Fourth. If you are using a PVR (personal video recorder) which buffers the signal to the hard disc to allow you instant pause of live programmes then this will also introduce a delay as the the signal has to be read from the disc before being passed to the TV. There may be more reasons and I am surprised that the difference for you is as much as 20 seconds. Another possible cause would be if the Internet is used as a link somewhere. This can add another 4 -5 seconds with ease. [/QUOTE]

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