Specifications

Windows Embedded Automotive 7 Deep Dive: Phone Core and Media Core 101
Glossary
A2DP—Advanced Audio Distribution Profile.
A2DP defines how high-quality audio
(stereo or mono) can be streamed from one
device to another over a Bluetooth wireless
technology connection.
AAC—Advanced Audio Coding. AAC is a
standardized, lossy compression and
encoding scheme for digital audio that is
designed to be the successor of the MP3
format. AAC generally achieves better
sound quality than MP3 at many bit rates.
AEC/NS—Acoustic echo cancellation/noise
suppression. AEC/NS is the process of
removing noise and echo from a voice
communication to improve voice quality on
a phone call.
API—Application programming interface.
An API is a source code interface that an
operating system or library provides to
support requests for services to be made by
computer programs.
ASX—Advanced Stream Redirector. One of
the three Windows Media metafile formats
(ASX, WAX, and WVX). The ASX file is a
metafile (a file that contains data about
another file).
ATCI—AT command interpreter. ATCI
enables the Windows Embedded
Automotive 7–based device to be used as a
modem. ATCI receives AT commands
through an input serial port and then parses
and interprets them into TAPI, Ex TAPI, or
RIL calls. The responses are then converted
to AT response codes and returned through
the output serial port handle. Typically, the
input and output serial ports are the same
port. ATCI is used with DUN over Bluetooth.
AT commands—The Hayes command set,
also called the AT (for attention) command
set, is used by dial-up modems. The
command set consists of a series of short
strings that combine together to produce
complete commands for operations such as
dialing, hanging up, and changing the
parameters of the connection.
AVRCP—Audio/Video Remote Control
Profile. AVRCP is designed to provide a
standard interface to control devices to let
a single remote control be in control of all
of the audio/visual equipment to which a
user has access.
BB—Baseband. The baseband is the
physical layer lying on top of the Bluetooth
radio layer in the Bluetooth stack. It
manages physical channels and links, apart
from other services such as error
correction, data whitening, hop selection,
and Bluetooth security. The baseband
protocol is implemented as a Link
Controller, which works with the link
manager for carrying out link-level routines
such as link connection and power control.
The baseband also manages asynchronous
and synchronous links, handles packets, and
does paging and inquiry to access and
inquire Bluetooth devices in the area. The
baseband transceiver applies a time-
division duplex (TDD) scheme.
Bluetooth wireless technology—An
industrial specification for wireless personal
area networks. Bluetooth provides
connection and information exchange
between devices, such as mobile phones,
laptops, personal computers, printers,
digital cameras, and video game consoles
over a secure, globally unlicensed, short-
range radio frequency.
Bluetooth version 2.0 + EDR introduced an
Enhanced Data Rate (EDR) of 3.0
megabit/sec (basic signaling rate; the
practical data transfer rate is 2.1
megabit/sec).