1월자 하이비에서 본 내용.



파이오니아 신형 리시버 AX4AVi에 적용됐다는 Phase Control이란 게



5.1중에 .1채널인 LFE 신호 처리에서 발생하는 Phase Lag 때문에



나머지 5채널보다 Delay가 생기는 걸 보정해 준대는 군요....



이 Phase Control 방식으로 제작된 DVD도 나왔구요.



아마 LFE를 한 템포 빠르게 녹음한 거겠죠?





그러니까 지금까지 우리가 써왔던 5.1시스템은 .1이 조금씩 늦게 나오는



것이라는 충격적인 폭로군요....



근데 DD/DTS DAC이 LFE를 처리하는데 그렇게 시간이 오래걸리는건지..... 5 msec 라.



집에 가서 서브우퍼의 딜레이를 좀 줄여봐야겠군요.





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http://www.pioneerelectronics.com/pna/article/0,,2076_4151_20157532,00.html 에서



When amplifying multi-channel audio signals, receivers and subwoofers use a Low Pass Filter (LPF) for processing low-frequency (bass) signals for subwoofer output. It is this extra process(s) that causes phase lag, an approximately 5 millisecond delay of low-frequency signals relative to the main channels. This is equivalent to a 6.5 to 9 foot distance gap. The delayed bass affects the quality of the main-channel sound, making the overall sound field lack synchronization. Pioneer's Phase Control technology applies a new bass management system that effectively compensates for phase lag to significantly improve multi-channel sound. Now, your subwoofer is going to hit that critical bass note (or explosion) at the same time the rest of the speakers are doing their part.