MP3 bit rate / sampling rate.

Guest
Hi All,
I want to clarify some basic questions of MP3.

44.1KHz, 128Kbps

44.1KHz, sample a wav file 44.1*1000 times in one second. ( no doubt)

128Kbps
The total bit(s) per second.

Both are realated to music quality.


Q: Why MP3 format use kbps, not 16bit / 8bit.
Boki: User choice MP3 quality first, then the Mp3 codec convert content that
not more then xxxKbps.



WAV file size calculation:

sampling rate * stereo * bit rate(?) * time(second)
= 44.1K * 2 * 16bit * 60(s)
= 10.09368896484375 (MB)


am I right ?
 
rechel99@hotmail.com wrote:

Hi All,
I want to clarify some basic questions of MP3.

44.1KHz, 128Kbps
Click to expand...
That's a typical mp3 data rate.


44.1KHz, sample a wav file 44.1*1000 times in one second. ( no doubt)

128Kbps
The total bit(s) per second.
Click to expand...
I don't understand what you're saying here.


Both are realated to music quality.

Q: Why MP3 format use kbps, not 16bit / 8bit.
Click to expand...
Because mp3 doesn't encode in fixed numbers of bits per sample.


Boki: User choice MP3 quality first, then the Mp3 codec convert content that
not more then xxxKbps.

WAV file size calculation:

sampling rate * stereo * bit rate(?) * time(second)
= 44.1K * 2 * 16bit * 60(s)
= 10.09368896484375 (MB)

am I right ?
Click to expand...
CD audio = 44.1k samples/sec * 16 bits/ch * 2 channels. = 1.4112 Mbps

mp3 encoded music is anything typically between 64 and 320 kbps. It's a form of
lossy compression.


Graham
 
Thanks for answer!

Best regards,
Boki.

"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com>
???????:4288F404.6956A2A2@hotmail.com...
rechel99@hotmail.com wrote:

Hi All,
I want to clarify some basic questions of MP3.

44.1KHz, 128Kbps

That's a typical mp3 data rate.


44.1KHz, sample a wav file 44.1*1000 times in one second. ( no doubt)

128Kbps
The total bit(s) per second.

I don't understand what you're saying here.


Both are realated to music quality.

Q: Why MP3 format use kbps, not 16bit / 8bit.

Because mp3 doesn't encode in fixed numbers of bits per sample.


Boki: User choice MP3 quality first, then the Mp3 codec convert content
that
not more then xxxKbps.

WAV file size calculation:

sampling rate * stereo * bit rate(?) * time(second)
= 44.1K * 2 * 16bit * 60(s)
= 10.09368896484375 (MB)

am I right ?

CD audio = 44.1k samples/sec * 16 bits/ch * 2 channels. = 1.4112 Mbps

mp3 encoded music is anything typically between 64 and 320 kbps. It's a
form of
lossy compression.


Graham
Click to expand...
 
bokiteam@ms21.hinet.net wrote:

Thanks for answer!

Best regards,
Boki.
Click to expand...
You're welcome. Btw - I suspect when hard drive technology has advanced a few
more years and everyone has high speed broadband, I bet everyone will wonder
why they ever bothered with shitty mp3 files !

Then Apple can make another killing by selling wav players - or is that aiff
players in apple speak ( or whatever ? ).


Graham
 
um.. new codec.... new format ... new ... :D



"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com>
???????:428AFF75.9CD69163@hotmail.com...
bokiteam@ms21.hinet.net wrote:

Thanks for answer!

Best regards,
Boki.

You're welcome. Btw - I suspect when hard drive technology has advanced a
few
more years and everyone has high speed broadband, I bet everyone will
wonder
why they ever bothered with shitty mp3 files !

Then Apple can make another killing by selling wav players - or is that
aiff
players in apple speak ( or whatever ? ).


Graham
Click to expand...
 
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