View Single Post
  #7   Report Post  
Old July 19th 07, 03:38 PM posted to sci.electronics.basics,rec.radio.shortwave,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless
Dana Dana is offline
external usenet poster
 
First recorded activity by RadioBanter: Oct 2006
Posts: 49
Default A more rational approach -- how I would like to change the cell phone industry.


"Jeff Liebermann" wrote in message
...
Radium hath wroth:

On Jul 1, 7:24 am, wrote in
http://groups.google.com/group/sci.e...0c8ed13?hl=en&
how would u like to change the cell phone industry?


Analog cell phones should stop using FM and should start using AM at
whatever practical radio frequencies available.


Why bother? Analog cell phones are going away on Valentine's Day
2008.
http://dialzero.blogspot.com/2007/06/analog-cellphone-service-to-end-after.html
I won't be sending you a valentine card. You're not my type.
Are you also working on whale oil products and sealing wax?


The FCC does not require that analog service be turned off. Only that
carriers are not required to continue analog service past that date.
A good number of rural areas will probably continue to use Analog cellualr
service for a few years after that.

Digital cell phones should stop using the compression they use and
start using monaural WMA compression with a CBR of 20 kbps or less and
a sample rate of at least 44.1 KHz.


Oh, you want music over your cell phone? Of course that means fewer
users per MHz. Very roughly, the current 8Kbits/sec encoding rate,
compared to your 44Kbit/sec, will only handle about 1/5th the number
of users. So, your cell phone bill goes up about 5 times. Of course
you don't mind because you'll have hi-fi oozing out of your phone. You
might want to research variable rate codecs, such as EVRC.

1. In its uncompressed form, the audio must have a bit-resolution of
at least 16-bit


The encoding resolution is not changed by compression. If you encode
something with 16 bit resolution, and compress it, you still have 16
bit data coming out. It's the data rate or thruput that changes with
compression.

2. The sample-rate of the compressed and the uncompressed version of
the audio must be the same.


Not possible. If the rate in and rate out are identical, then there's
no compression happening.

At least you're consistent. You got everything wrong, again.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558