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LeAudio

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introducing
bluetooth le audio
by nick hunn
a guide to the latest bluetooth specifications and how they will
change t he way we design and use audio and telephony products
first published january
paperback isbn
hardback isbn
copyright nick hunn
all rights reserved
the bluetooth word mark and logos are registered trademarks owned by bluetooth sig inc
and any use of such marks is with permission other trademarks and trade names are those
of their respective owners
www bleaudiocom wwwnickhunncom
acknowledgements
i would like to thank eve ryone who has helped towards the existence of this
book without the work of many brilliant people contributing to the
specifications there would be nothing to write about they are too numerous
to list here but they are recorded in each of the bluetooth documents trying
to develop standards of this complexity results in many days and evenings of
wideranging discussions which have been both challenging and enjoyable it
has been a pleasure to work with so many people of passion who are always
ready to spend time explaining the intricacies of wireless audio and its
application
for taking the time to read through the drafts and coming back with detailed
comments i would particularly like to thank richard einhorn kanji kerai
ken kolderup mahendra tailor jonathan tanner and martin wool ley their
input from a variety of differ ent reader angles has helped make this into a
much better book than it would otherwise have been i must also thank the
bluetooth sig for their help and support
for giving me permission to use the image of figure and also for playing a
pivotal role in kickstarting the whole world of hearables many thanks to
nikolaj hviid of bragi
finally to my wife chris for reading the endless drafts as well as the final
book from cover to cover multiple times questioning everything as well as
putting up with the many hours i spent writing it
contents
chapter the background and heritage
the hearing aid legacy
limitations and proprietary extensions
whats in a hearable
chapter the bluetooth le audio architecture
the use cases
the bluetooth le audio architecture
talking about bluetooth le audio
chapter new concepts in bluetooth le audio
multi profile by design
the audio sink led journey
terminology
context types
availability
audio location
channel al location multiplexing
call control id ccid
coordinated sets
presentation delay and serialisation of audio data
announcements
remote controls commanders
chapter isochronous streams
bluetooth le audio topologies
isochronous streams and roles