http://www.lavryengineering.com/documents/Sampling_Theory.pdf



디지털 오디오의 권위자(?) Dan Lavry가 내놓은 분석 논문(?)입니다.

내용은 간단히 요약하면 24/192는 필요하지않고, overkill (지나친 것)이다.

라는 내용입니다.



영어 해석은 되는데 기술적으로 제가 잘 모르는 내용이지만

이쪽 부분에 잘 아시는 분에게 도움이 될 지 몰라 옮겨옵니다.



아래는 결론부분만 따온 것입니다.



Conclusion:

There is an inescapable tradeoff between faster sampling on one hand and a loss of accuracy,

increased data size and much additional processing requirement on the other hand.

AD converter designers can not generate 20 bits at MHz speeds, yet they often utilize a circuit yielding a few bits at MHz speeds as a step towards making many bits at lower speeds.

The compromise between speed and accuracy is a permanent engineering and scientific reality.

Sampling audio signals at 192KHz is about 3 times faster than the optimal rate.

It compromises the accuracy which ends up as audio distortions.

While there is no up side to operation at excessive speeds, there are further disadvantages:



1. The increased speed causes larger amount of data (impacting data storage and data transmission speed requirements).



2. Operating at 192KHz causes a very significant increase in the required processing power, resulting in very costly gear and/or further compromise in audio quality.



The optimal sample rate should be largely based on the required signal bandwidth. Audio industry salesman have been promoting faster than optimal rates. The promotion of such ideas is based on the fallacy that faster rates yield more accuracy and/or more detail. Weather motivated by profit or ignorance, the promoters, leading the industry in the wrong direction, are

stating the opposite of what is true.