CMI-8738 データシートの表示（PDF） - C-Media Electronics

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CMI-8738

C3DX PCI-Based HRTF 3D Extension Positional Audio Chip

C-Media Electronics 

Ver. 1.2

CMI-8738/PCI-SX AUDIO Specification

Audio Processing Technology

5. HRTF 3D Extension Positional (C-Media 3DX)

3D illusion exists because traditional 3D positional audio system assumes the user's

position as the sweet spot to design crosstalk-cancellation circuit; therefore, if the user

wants to have 3D positional audio effects, he can’t move his head or position out of sweet

spot. Another 3D illusion fails because half the population are compulsive

"head-turners" who will never get 3D audio from two speakers . To remedy this,

C-Media utilizes HRTF 3D extension technology (C3DX) to enhance traditional HRTF 3D

positional audio by substituting two-speaker system by four-speaker one. Therefore, at

least one or two speakers should be placed behind the listener's head to complement

the rear-side effect, thus creating compelling realistic sound. This technology greatly

improves HRTF 3D positional audio quality, and successfully eliminates the sweet spot

limitation. Users can enjoy the real 3D audio gaming effects, and don't have to worry

about the environmental confinement any more.

A virtual

speaker

A physical

speaker

C-MEDIA ELECTRONICS INC. Tel:886-2-87731100 Fax:886-2-87732211 URL : www.cmedia.com.tw

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