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Controller Diagram
As you can see from this diagram, the controller can drive multiple codecs, and these codecs can operate independently of
one another, allowing different numbers of streams to be routed through each codec at different sampling rates.
Future Considerations
One of the obstacles to improved sound quality currently is with DVD-Audio (DVD-A), the emerging audio standard.
Presently, even if you do get everything together—8-channel speakers, a DVD-A disc, and a system board with a high-
definition codec—you still do not get full audio bit-rate playback. Why? Because of copyright protection issues.
The full range of DVD-A formats (up to 192 Khz / 24 bit) are supported by Microsoft® DirectSound® and the Intel drivers.
However, DVD-Audio player software down-samples to 48 Khz / 16-bit when playing back DVD-A–encrypted content on
current PC hardware and software driver systems. The reason is that standard PC audio offers insufficient content
protection for the copyright holders, so the audio playback is crippled.
Acknowledgements
Much of the material for this page was garnered from several sources, in particular those listed below. To learn more about
Intel's HD audio, visit the following links:
Intel.com
Bit-tech.net
Extremetech.com
Bandwidth
assignment
Fixed Dynamic
Analog Plug n Play Limited Comprehensive
Power management None Idle detection, fine-grained power control
Microphone array Two elements Up to 16 elements
Driver software
Developed by audio codec
supplier
OS native bus driver and independent hardware vendor value-
added function driver
Docking None Enabled
Hardware
configuration
Fixed Dynamic device enumeration
Printed 2/22/2010 11:17:19 AM
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Audio
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