Typical signal to noise ratio of ADPCM |
Typical signal to noise ratio of ADPCM |
 Jan 28 2013, 15:08
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#1
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Group: Members Posts: 84 Joined: 14-December 12 Member No.: 105171  |
So, I have decided to return to this forum (despite my little conflict with greynol) and I have kind of a weird question. I would like to know what is the rough SNR of a 4-bit ADPCM recording (IMA and Microsoft). For those curious why I am asking this, well, I like ripping music and sound effects from old games, and I would like know the technical side as well.
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Jan 30 2013, 15:24
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#2
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Group: Members Posts: 3083 Joined: 1-September 05 From: SE Pennsylvania Member No.: 24233 |
The "dynamic range" of mp3 is actually quite a bit more than that. To understand this, you need to think in terms of a floating point number. Mp3 has, in effect, a fairly small mantissa, so it can only represent any value with limited precision. However, its exponent can range from very large to very small, making the range of values that can be represented quite large.
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Neuron Typical signal to noise ratio of ADPCM Jan 28 2013, 15:08
saratoga There are various adpcm flavors. Which are you usi... Jan 28 2013, 16:56
Neuron QUOTE (saratoga @ Jan 28 2013, 16:56) The... Jan 28 2013, 20:16 Garf CompAudio from AFsp can calculate this, IIRC. But ... Jan 28 2013, 17:51 Woodinville QUOTE (Garf @ Jan 28 2013, 08:51) CompAud... Jan 31 2013, 08:30 kode54 Cool, game soundtrack ripping for the win. I may b... Jan 29 2013, 06:07 Neuron QUOTE (kode54 @ Jan 29 2013, 06:07) Cool,... Jan 29 2013, 11:54 Neuron QUOTE (kode54 @ Jan 29 2013, 06:07) Cool,... Jan 29 2013, 16:47 Neuron Here it is:http://www.hydrogenaudio.org/forums/ind... Jan 29 2013, 12:46 saratoga If you have the lossless and lossy encoded files y... Jan 29 2013, 17:37 Neuron I have to admit I don't really know how to do ... Jan 29 2013, 22:42 Neuron I've added the song in 44 Khz MS ADPCM to the ... Jan 29 2013, 23:15 bandpass QUOTE (Neuron @ Jan 29 2013, 22:15) MS AD... Jan 30 2013, 08:46 Woodinville QUOTE (Neuron @ Jan 29 2013, 13:42) I hav... Jan 31 2013, 08:33 extrabigmehdi Well, I used the normalize function of soundforge ... Jan 30 2013, 00:08 Neuron QUOTE (extrabigmehdi @ Jan 30 2013, 00:08... Jan 30 2013, 11:29 extrabigmehdi QUOTE (Neuron @ Jan 30 2013, 10:29) Thank... Jan 30 2013, 13:48 Neuron Thank you, but what does "signal: -19 db... Jan 30 2013, 14:14 db1989 QUOTE (Neuron @ Jan 30 2013, 13:14) ADPCM... Jan 30 2013, 15:29 extrabigmehdi QUOTE (Neuron @ Jan 30 2013, 13:14) Thank... Jan 30 2013, 15:49 Neuron QUOTE (extrabigmehdi @ Jan 30 2013, 15:49... Jan 30 2013, 16:07 Neuron QUOTE (extrabigmehdi @ Jan 30 2013, 15:49... Jan 30 2013, 16:13 Neuron I did an Audacity convert to mono + match both vol... Jan 30 2013, 16:00 extrabigmehdi QUOTE (Neuron @ Jan 30 2013, 15:00) I got... Jan 30 2013, 17:03 Neuron QUOTE (extrabigmehdi @ Jan 30 2013, 17:03... Jan 30 2013, 21:04 saratoga QUOTE (Neuron @ Jan 30 2013, 10:00) I did... Jan 30 2013, 18:20 Neuron QUOTE (saratoga @ Jan 30 2013, 18:20) So ... Jan 30 2013, 21:24 saratoga QUOTE (Neuron @ Jan 30 2013, 15:24) QUOTE... Jan 31 2013, 01:44 Neuron QUOTE (saratoga @ Jan 31 2013, 01:44) QUO... Jan 31 2013, 13:44 Neuron That is true, but it does not explain why the ADPC... Jan 30 2013, 21:10 |
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Lo-Fi Version | Time is now: 25th May 2013 - 23:58 |
