 |  |  |  |  |  |  |  |
analog and digital
 |
•
•
Join Date: Jul 2004
Posts: 1,749
Reputation: 
Solved Threads: 55
what is the difference between analog n digital monitors...
and what is the difference between an analog mobile connection and a digital mobile connection ... analog usually know as aims ... and digital know as gsm.
and what is the difference between an analog mobile connection and a digital mobile connection ... analog usually know as aims ... and digital know as gsm.
•
•
Join Date: Aug 2004
Posts: 298
Reputation:
Solved Threads: 2
Posting Whiz in Training
analog recieves a data stream in the form of a sine wave the primary carrier
wave can be modulated in two ways: frequency and amplitude. there are
many other ways to "add data" to a carrier wave.. heterodyning (the fusing of
signals with less than a 100mhz seperation to form a new signal) can also be
used along with multiplexing to improve data dencity. so think old cable box,
coax, sharp notch filters and the like.
It takes alot to improve data dencity. also, quality is easily degraded by
outside interference, weak signal etc. jaketed cables are heavy (and durable)
even if damaged severely and are barely intact the signal still gets pushed and
interpreted.. good or not. since data dencity is generally lower, frames per
second and refresh rates are too. analog signals are electricly generated
pulses.. this means that no occilating crystal (like a system clock) was used
to generate a specific timing interval on to which all things sync up to.
electrically generated waves at low frequencies are gigantic the physical size
can be so large you cant even recieve it without a giant antenna.. coax IS a
waveguide thats shy it has plastic innards and a braided jacket there is an
upper limit to the size of the wave that can fit in that pipe. so the higher the
frequency the smaller the interval between pulses & the more data that fits in
the pipe.. it is important to keep the pipe the right size.. mismatch size and
interference hitches a ride.. destroying data in any form
digital signals are usually more accurate as to where each "wave starts and
stops".. they are very rigid (as opposed to the afore mentioned sine wave
which looks more like a tilde '~~~~~~~~~~') and are called square waves
(true on and off pulses) these actually degrade just as easy and are
suceptable to all of the same electrical signal processing woes (unless were
talking fiber which means wavicle theory and whatnot..) as thier analog
brethren and can even be pushed down the same pipe as analog. (take cable
for instance.. analog and digital out of the same line.. but digital is crystal
generated and keeps time very well.. whether its a chunk of silicon that made
it or a single occilating chunk of quartz being fed power on a board to
brodcast a timing pulse youll see the difference. imagine that..) because they
just run them at different frequencies. the fact of the matter is is that most
analog signals get converted to digital data and have post processing in the
hardware itself.. most good televisions have this feature now. the biggest
advantage i see for all of this is post/pre processing
capability and data dencity. those things get teeny weenie insize.. 1ghz cpu
speed 400mhz bus speed come on..
better application through higher levels of accuracy. you are also opened
up to using data compression without worrying about signal loss when you
uncompress it again because pulse length is generally the same just the way it
is interpreted changes
the way the data is read from a cd would be digital. laser disk was a digital
attempt. pre processed, accurately interpreted, ready for uncompression or
more processing by a computer or similar device
the way the data is read from a VHS tape would be analog. raw wave form
uninterpreted potentially dirty or containing interference manually re or
demodulated using good ol vaccuum tube and transistor/resistor technology
(still not without the help of a chip or three in the last 25 years)
man that is wordy
wave can be modulated in two ways: frequency and amplitude. there are
many other ways to "add data" to a carrier wave.. heterodyning (the fusing of
signals with less than a 100mhz seperation to form a new signal) can also be
used along with multiplexing to improve data dencity. so think old cable box,
coax, sharp notch filters and the like.
It takes alot to improve data dencity. also, quality is easily degraded by
outside interference, weak signal etc. jaketed cables are heavy (and durable)
even if damaged severely and are barely intact the signal still gets pushed and
interpreted.. good or not. since data dencity is generally lower, frames per
second and refresh rates are too. analog signals are electricly generated
pulses.. this means that no occilating crystal (like a system clock) was used
to generate a specific timing interval on to which all things sync up to.
electrically generated waves at low frequencies are gigantic the physical size
can be so large you cant even recieve it without a giant antenna.. coax IS a
waveguide thats shy it has plastic innards and a braided jacket there is an
upper limit to the size of the wave that can fit in that pipe. so the higher the
frequency the smaller the interval between pulses & the more data that fits in
the pipe.. it is important to keep the pipe the right size.. mismatch size and
interference hitches a ride.. destroying data in any form
digital signals are usually more accurate as to where each "wave starts and
stops".. they are very rigid (as opposed to the afore mentioned sine wave
which looks more like a tilde '~~~~~~~~~~') and are called square waves
(true on and off pulses) these actually degrade just as easy and are
suceptable to all of the same electrical signal processing woes (unless were
talking fiber which means wavicle theory and whatnot..) as thier analog
brethren and can even be pushed down the same pipe as analog. (take cable
for instance.. analog and digital out of the same line.. but digital is crystal
generated and keeps time very well.. whether its a chunk of silicon that made
it or a single occilating chunk of quartz being fed power on a board to
brodcast a timing pulse youll see the difference. imagine that..) because they
just run them at different frequencies. the fact of the matter is is that most
analog signals get converted to digital data and have post processing in the
hardware itself.. most good televisions have this feature now. the biggest
advantage i see for all of this is post/pre processing
capability and data dencity. those things get teeny weenie insize.. 1ghz cpu
speed 400mhz bus speed come on..
better application through higher levels of accuracy. you are also opened
up to using data compression without worrying about signal loss when you
uncompress it again because pulse length is generally the same just the way it
is interpreted changes
the way the data is read from a cd would be digital. laser disk was a digital
attempt. pre processed, accurately interpreted, ready for uncompression or
more processing by a computer or similar device
the way the data is read from a VHS tape would be analog. raw wave form
uninterpreted potentially dirty or containing interference manually re or
demodulated using good ol vaccuum tube and transistor/resistor technology
(still not without the help of a chip or three in the last 25 years)
man that is wordy
Last edited by Cain; Sep 16th, 2004 at 1:54 pm. Reason: killertypo
I used up all my money on you baby...
... and I want it BACK.
... and I want it BACK.
•
•
Join Date: Jul 2004
Posts: 1,749
Reputation:
Solved Threads: 55
wooo Cain you were so nice to me ... you explained each and every aspect of the digital and analog signals ... thanks for giving your time ...
•
•
Join Date: Aug 2004
Posts: 60
Reputation:
Solved Threads: 0
Junior Poster in Training
Analog Is Analog And Digital Is Digital And Nothing Its To Worry About Because There Are Still More Than Digitals To Come In Near Future.stay Tuned For Future.
•
•
Join Date: Jul 2004
Posts: 1,749
Reputation:
Solved Threads: 55
•
•
•
•
Analog Is Analog And Digital Is Digital And Nothing Its To Worry About Because There Are Still More Than Digitals To Come In Near Future.stay Tuned For Future.
•
•
Join Date: Aug 2004
Posts: 298
Reputation:
Solved Threads: 2
Posting Whiz in Training
sometimes you've got it.. glad to help folks.
i agree. there will be a day when it all comes around.. again.
i agree. there will be a day when it all comes around.. again.
I used up all my money on you baby...
... and I want it BACK.
... and I want it BACK.
•
•
Join Date: Aug 2004
Posts: 60
Reputation:
Solved Threads: 0
Junior Poster in Training
Thanks God
•
•
Join Date: Dec 2005
Posts: 3,234
Reputation:
Solved Threads: 26
I think Analog audio sounds MUCH BETTER for the most part.
For example,I watched the movie COMMANDO on DVD a couple months ago,IT WAS TERRIBLE (The audio) .. I prefer my analog VHS copy anyday!!!
I have many Cassette tapes and all,the audio from stuff recorded via ANALOG sounds 10x as good!!
Analog audio is MUCH better
For example,I watched the movie COMMANDO on DVD a couple months ago,IT WAS TERRIBLE (The audio) .. I prefer my analog VHS copy anyday!!!
I have many Cassette tapes and all,the audio from stuff recorded via ANALOG sounds 10x as good!!
Analog audio is MUCH better
Last edited by The Dude; Jan 9th, 2007 at 10:05 pm.
|
Similar Threads
- reguire analog to digital convertion code.. (Visual Basic 4 / 5 / 6)
- Digital TV Tuner? (Apple Hardware)
Other Threads in the IT Professionals' Lounge Forum
- Previous Thread: System restore Dell Dimension 2400..Help!!
- Next Thread: Recruitment agencies only money making establishments?
| Thread Tools | Search this Thread |
You need to join our community in order to build your list of favorite forums. You can visit the forum index for a listing of all forums.
Related Forum Features
Latest IT Professionals' Lounge Posts
- Today's Posts
- Unanswered Threads
1gbit advertising advice amazon answers archive british broadband business businessprocesses career carrier censorship cern china cio collectiveintelligence connectivity consumer consumers corporateearnings datatransfer debtcollectors dictionary digg digital ebay ecommerce email employment environment facebook food government grid high-definition hottub infodelivery infotech intel internet interview ipod isp japan kindle lhc library malware marketing mit moonfruit news onlineshopping piracy piratebay pope porn program questions r&d religion remoteworking research retail security sex shopping simple skype smallbusiness smb sms socialmedia socialnetworking software softwareengineer spam speed spending startrek statistics stocks study stumbleupon survey tabletpc technology touch-screen touchscreen twitter uk videoinprint voips web webdeveloper windows words
