Teknor Industrial Computers PCI-934, Техническое справочное руководство

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PCI-934 Technical Reference Manual
12-2
Software Applications
These are data (text, picture, sound from games, MPEG software decoding, ...)
provided by an application running on the computer.
Software applications are under the supervision of the processor. The more there are
applications running, the more the processor is busy and system resources decrease.
Video Stream
Thanks to the onboard MPEG hardware decoder, running a multimedia stream through
this path would not take up more than 20% of the CPU bandwidth. During this time,
the MPEG decoder receives information from the IDE device, decompresses and splits
off the audio and video data that is sent to the SoundBlaster™ Pro controller and to the
video controller.
Sound Controller
It is built around the AD1816-SoundPort
®
controller. The MPEG decoder transfers the
sound stream through a serial path (I
2
S). The sound controller is associated to a solid
state digital wavetable that enables the PCI-934 to provide CD-quality audio output.
The wavetable provides a MIDI interpreter, synthesis engine, effect processor, with
1MB sample ROM. It features general MIDI samples set including 128 melodic
instruments and 47 percussion sounds. The synthesis engine can generate up to 32
simultaneous notes. Digital reverberation and chorusing effects are included.
V-Port Support
The implementation of the V-Port interface allows the board to provide live-video
preview/capture, TV-in-a-window, video conferencing, or external hardware-assisted
MPEG. This interface allows off-loads video bandwidth from the PCI bus by
transferring the video stream directly into the display memory, bypassing the CPU.
The video data source may be selected from the onboard MPEG decoder or an external
video source through the Register #3 - bit 1 and bit 7 (See Section 13.3 I/O
Addresses).