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July 19th 07, 08:22 AM
posted to sci.electronics.basics,rec.radio.shortwave,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless
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A more rational approach -- how I would like to change the cell phone industry.
Jeff,
He typed the message on his Commodore 64 with an Atari floppy drive! Jeff Liebermann wrote: Radium hath wroth: On Jul 1, 7:24 am, wrote in http://groups.google.com/group/sci.e...696d6abf90c8ed 13?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...ice-to-end-aft er.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? 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. -- - |
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