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| 型号： | DSRT-L030-011 |
| 厂商： | CONEXANT SYSTEMS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, XMA |
| 文件页数： | 56/86页 |
| 文件大小： | 667K |
| 代理商： | DSRT-L030-011 |
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RipTide PCI Audio/Comm Device Family Product Description
6
ROCKWELL PROPRIETARY INFORMATION
1167
3.2
Audio
3.2.1
Patented PCI Sound Blaster Emulation
Compatibility with Sound Blaster and Sound Blaster Pro means that the RipTide System supports games that run in Windows
DOS boxes and/or real-mode DOS. The legacy audio logic in the Controller detects games and application accesses to
legacy audio resources and legacy hardware.
In real-mode DOS, the Controller emulates Sound Blaster, Sound Blaster Pro 2 v3.02, Adlib, OPL2/3 FM synthesis, legacy
Game Port and MPU-401 hardware. Legacy audio operations are performed in hardware.
For Windows 95 DOS box, RipTide VxD drivers provide legacy audio emulation for the audio devices noted above. During
installation of a RipTide PCI board, the software drivers/PCI enumeration, in conjunction with the system's PnP hardware,
determines and assigns available I/O, IRQ, and DMA resources to the legacy hardware.
The Device Manager in Windows 95 may be used to set audio resources on older PCI systems without PnP. RipTide is
compatible with legacy I/O, IRQ, and DMA configurations.
3.2.2
FM Synthesis
The internal OPL3 and OPL2 compatible FM synthesis engine can operate in either 2 operator or 4 operator mode. Address,
data and status registers are provided for compatibility with the Adlib/Sound Blaster Pro interfaces. The output of the FM
synthesis is digitally mixed with other audio sources, improving sound quality.
3.2.3
Soft DVD Decoding
RipTide supports software DVD decoding solutions.
3.2.4
3D Spatialization and Bass Boost
3D spatialization and bass boost is fully supported within the Codec. Please refer to the RipTide RAMC001 and RAMC002
Audio Modem Codec (AMC’97) Product Description (Order No. 1166) for more details.
3.2.5
PCI Bus Master Interface with Scatter/Gather DMA
The Controller utilizes a Scatter/Gather DMA technique for maximum system efficiency. This descriptor-based method uses a
linked list of descriptors, in system memory, to instruct hardware where to read/write audio data. This method has the
advantage of requiring less overhead in copying data to or from a central buffer before or after transmission to or from the
hardware. This method lends itself better to a data model in which multiple simultaneous streams of data are flowing over a
bus (such as PCI Bus) since the copying overhead required in alternatives such as cyclic DMA increases greatly as the
number of simultaneous streams increase.
3.2.6
MMX-Accelerated HRTF-3D (A3D) (Optional)
With only a single pair of speakers, fully three-dimensional placement of stationary and moving point sound sources can be
realized using the RipTide HRTF-3D (A3D) technology. The RipTide HRTF-3D technology supports either headphones or
speakers for PC-based applications.
Psychoacoustic modeling with Head Related Transfer Functions (HRTF), atmospheric absorption, high frequency roll-off for
distance are used for the placement of sound sources in space. Doppler effect is also added via pitch shift for realistic moving
objects. Up to eight DirectSound channels with only one stereo DMA channel is used to process data across the PCI Bus to
the Controller.
The technology is a host-based engine which is MMX-optimized to obtain higher processing efficiency than Microsoft’s native
DirectSound3D, while providing superior three-dimensional sound quality.
3.2.7
High Quality Sample Rate Converter
The Controller performs sample rate conversion, offloading the host CPU and improving system performance. The high
quality sample rate converter measures nearly 100 dB signal-to-noise ratio (SNR) with better than 1 Hz sample rate
resolution.
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相关代理商/技术参数 |
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| DSR-TSS-S1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
| DSR-TSS-S2 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
| DSR-TSS-ST2-1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
| DSR-TSS-T1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
| DSR-TSS-T2 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:Right Angle LED |
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