My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
Introduction to Advanced Audio Distribution Profile (A2DP)
Posted Date: 21 Feb 2008 Resource Type: Articles/Knowledge Sharing Category: General
|
Posted By: satish Member Level: Gold
Rating:  Points: 5
|
|
|
1 Introduction
1.1 Scope
The Advanced Audio Distribution Profile (A2DP) defines the protocols and procedures
that realize distribution of audio content of high-quality in mono or stereo on ACL
channels. The term “advanced audio”, therefore, should be distinguished from
“Bluetooth audio”, which indicates distribution of narrow band voice on SCO channels
as defined in Chapter 12 of Bluetooth Baseband specification [2].
A typical usage case is the streaming of music content from a stereo music player to
headphones or speakers. The audio data is compressed in a proper format for efficient
use of the limited bandwidth. Surround sound distribution is not included in the scope of
this profile.
The A2DP focuses on audio streaming, while the Video Distribution Profile (VDP)
specifies video streaming. Support of both profiles enables us to distribute video content
accompanied with high-quality audio. The usage case of video and audio streaming is
described in the VDP.
Note also that the A2DP does not include remote control functions. Devices may
support remote control features by implementing both A2DP and the control profile as
depicted, for example, in the usage scenario of Audio/Video Remote Control Profile [3].
The QoS functionality required by the Core Specification is being enhanced to establish
rules for capacity allocation during connection setup so that guaranteed service types
can be assured of minimum time allocations. This provides predictable results when
multiple profiles are operating in the piconet. These are currently planned for the 2006
release.
1.2 Profile Dependency
In Figure 1.1, the structure and the dependencies of the profiles are depicted. A profile
is dependent upon another profile if it re-uses parts of that profile, by implicitly or
explicitly referencing it. Dependency is illustrated in the figure. A profile has
dependencies on the profile(s) in which it is contained – directly and indirectly.
As indicated in Figure 1.1, the A2DP is dependent upon the Generic Access Profile
(GAP), as well as the Generic Audio/Video Distribution Profile (GAVDP) [4], which
defines procedures required to set up an audio/video streaming. The A2DP defines
parameters and procedures that are specific for audio streaming. The terminology, user
interface and procedures as defined in the GAP and GAVDP are applicable to this
profile, unless explicitly stated otherwise.
|
Responses
|
No responses found. Be the first to respond and make money from revenue sharing program.
|
|
Watch TV Channels
|