Controller Diagram; Future Considerations - Dell LATITUDE D620 User Manual

Dell - Latitude™ D620 - Printer-Friendly Format
Bandwidth
Fixed
assignment
Analog Plug n Play Limited
Power management None
Microphone array Two elements
Developed by audio codec
Driver software
supplier
Docking None
Hardware
Fixed
configuration
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.
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.
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
Printed 2/22/2010 11:17:19 AM
Expires 2/23/2010 11:17:19 AM
https://dcse.dell.com/SelfStudy/Foundations_2007/Foundations_2007_Portables/Portable...
Dynamic
Comprehensive
Idle detection, fine-grained power control
Up to 16 elements
OS native bus driver and independent hardware vendor value-
added function driver
Enabled
Dynamic device enumeration
Latitude™ D620
Audio This document is Dell Confidential
For Dell Employees Only
Página 88 de 145
22/02/2010