2006-08-10 01:02:19 · 6 answers · asked by Brook 1 in Science & Mathematics ➔ Other - Science
Digital broadcasting involves an extra step to convert the information into digital form, and this takes a small but noticeable amount of time. Your receiver also takes a small but noticeable amount of time to decode the signal it receives.
Some people have suggested that the analog signal could be delayed to compensate for this, but this has been resisted so far.
Other forms of digital media have the same delay, incidentally, it's just that when you're listening to a CD or your MP3 player, it doesn't make any difference that what you're hearing is what the machine started to read off the disc 2 seconds ago.
2006-08-10 01:17:06 · answer #1 · answered by Graham I 6 · 2⤊ 1⤋
It's simply the extra time taken for your Digital TV or Radio to interpret the digital signal... for analogue signals the TV doesn't need to do much by way of fancy work between receiving the signal and forming the picture, whereas a digital system receives it in one "language" and then has to decode it, translate, and display it in another "language"... a bit like having a conversation through an interpreter!
What's really nice is that if you have a household with several digital televisions/radios receiving the same signal you'll often see a lag of a couple of seconds between sets in different rooms... depending on how your system is set up.
Viva Analogue!
2006-08-10 09:52:09 · answer #2 · answered by Carlos the mackerel 1 · 0⤊ 0⤋
They both get sent out at the same time, but it takes a digital decoder up to two seconds to give you the picture. Don't put your clock right by the timecheck on digital TV.
2006-08-10 08:10:58 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Two very different technologies. digital, newer, transmitts the picture by a 3 numbers for red, blue and green for each dot, in digital number form, translated by the digital reciever back into a picture as a stream for each frame. analog, the older and original technology uses 3 constantly varying voltage levels for RBG which are read accross the existing RGB line dots in your picture tube to recreate the picture. Radio uses a single stream of digital numbers to recreate the music and analog uses a constantly varying voltage attatched to a high freq carrier which is stripped off by the reciever, with the music remaing, transmitted to your speaker. C.
2006-08-10 08:16:17 · answer #4 · answered by Anonymous · 0⤊ 1⤋
yes. analogue is slightly quicker, but not as high quality (changing to digital and back again takes up a little time)
2006-08-10 08:06:36 · answer #5 · answered by Anonymous · 0⤊ 0⤋
DV can be transmitted faster becasue it can be transmitted over optical wire.
2006-08-10 09:07:22 · answer #6 · answered by Joebo 1 · 0⤊ 0⤋