Why are 128kbit/s MP3s usually 44,100 Hz? |
Why are 128kbit/s MP3s usually 44,100 Hz? |
 Oct 14 2012, 01:44
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Group: Members Posts: 30 Joined: 14-October 12 Member No.: 103838  |
Since 128kbit/s MP3s usually has a low-pass filter at 16,000 Hz, and the Nyquist-Shannon theorem states that all frequencies under f/2 Hz can be totally described at an f Hz sampling rate, why not encode at 32,000 Hz? Wouldn't it save more space?
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Oct 18 2012, 16:55
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#2
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Group: Members Posts: 2257 Joined: 9-October 05 From: Dormagen, Germany Member No.: 25015 |
Sure you can't get 16 kHz bandwidth, but something like 15 kHz or a little bit more if you don't want to run into audible artifact issues due to resampling.
Not a big differerence however but a valid point. This post has been edited by halb27: Oct 18 2012, 16:55 -------------------- lame3100i -V0.5+ --adbr_short 480
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eamon123 Why are 128kbit/s MP3s usually 44,100 Hz? Oct 14 2012, 01:44
splice QUOTE (eamon123 @ Oct 13 2012, 16:44) ...... Oct 14 2012, 01:53 saratoga QUOTE (eamon123 @ Oct 13 2012, 20:44) Sin... Oct 14 2012, 04:03
eamon123 QUOTE (saratoga @ Oct 14 2012, 04:03) Sin... Oct 15 2012, 05:02 saratoga QUOTE (eamon123 @ Oct 15 2012, 00:02) If ... Oct 15 2012, 05:38 Dynamic QUOTE (eamon123 @ Oct 15 2012, 05:02) Lis... Oct 16 2012, 18:07 eamon123 QUOTE (Dynamic @ Oct 16 2012, 18:07) tona... Oct 17 2012, 19:31 Dynamic QUOTE (eamon123 @ Oct 17 2012, 19:31) QUO... Oct 17 2012, 21:48 halb27 QUOTE (eamon123 @ Oct 17 2012, 20:31) I... Oct 17 2012, 22:19 halb27 Compreession is more effective when using 32 kHz. ... Oct 14 2012, 08:12 slks Indeed, many encoders *do* resample for low bit ra... Oct 14 2012, 21:10 pdq A 128 kbps encoding is the same size regardless of... Oct 15 2012, 03:02 halb27 If you listen to tonal problems at 128 kbps, you... Oct 15 2012, 05:43 robert MPEG-1 Layer 3 frames consist of 2 granules a 576 ... Oct 16 2012, 18:46 Dynamic Oops, thanks Robert. If I could edit my post now, ... Oct 16 2012, 19:39 Martel The problem is - how exactly do you resample a 44.... Oct 18 2012, 15:24 |
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