Displaying 2 results from an estimated 2 matches for "stopband".
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starband
2014 Jun 09
1
High Sampling Rates
...uous in nature. On other hand, all codecs (and everything in DSP) works on discrete signals (samples).
When you convert from discrete samples to analog signal, you need to apply an ideal filter, which has a frequency response of 1.0 (0 dB attenuation) in it?s passband and 0.0 (?infinite dB) in its stopband. The most important thing to understand here is that such an ideal filter does not exist in reality. What we do (most DACs do this) is to approximate such a filter using IIR?s or an FIR with some delay (sufficient delay that the truncation of impulse response does not matter much).
With higher sa...
2014 Jun 07
3
High Sampling Rates
On 6/7/14, 1:55 AM, Jean-Marc Valin wrote:
> Actually... no! 24-bit can indeed be useful as extra margin and Opus
> can actually represent even more dynamic range than 24-bit PCM. That's
> not the case for 192 kHz. There's no "margin" that 192 kHz buys you
> over 48 kHz. You can do as much linear filtering as you like, the
> stuff above 20 kHz isn't going to