Datasets:
kkboy1
/
LeAudio

Dataset card Data Studio Files
xet
 Community
1
text
stringlengths
1
112
codecid
codecspecificconfiguration lv
metadata lv numbis
bisindex
codecspecificconfiguration lv x
table order of entries for multiple subgroups and bises
section starting a broadcast audio stream
creating a big
as we saw with unicast the big is created using an hci command in this case the le
create big parameters with the parameters shown in table
parameter description
bighandle the big identifier set by the host
advertisinghandle the handle of the associated periodic advertising train
numbis the number of bises in the big
sduinterval the interval between the periodic sdus containing encoded
audio data in microseconds
maxsdu the maximum size of each sdu in octets
maxtransportlatency the maximum transport latency for each bis including pre
transmissions
rtn the requested number of retransmissions which is a
recommendation
phy a bitfield of acceptable phy values the controller will
choose from one of the supported options a high level
profile may mandate only one value normally mbps
mbps mbps le coded
packing the preferred method of arranging bis subevent s the
controller only uses this as a recommendation
sequential interleaved
framing if set to the bis data pdus will be framed if set to the
controller can decide w hether to use framed or unframed
encryption set to if the audio stream needs to be encrypted and for
unencrypted
broadcastcode the code used to generate the encryption key for all bises in
the big this should be set to zero for an unencrypted
stream
table parameters for the hci le create big command
an important difference between the le create big parameters command and the equivalent
le set cig parameters command is that the same parameters are used across every bis in
the big that limitation arises from the fact that the isochronous channel information is
contained in the biginfo packet which is not large enough to accommodate details of
multiple different bises the consequence is that every bis is the same size which must fit
the largest sdu different bises within the big may use different codec configurations and
even different codecs but the bis structure must be configured to fit the largest possible
packet across those different configurations if different qos settings are used for differen t
bises in the big it means that there will be redundant space
chapter setting up and using broadcast audio streams
having created the base structure the host can ask the controller to sche dule the big and
bises using the lecreatebig command defined in the core vol part e section
with the parameters shown in table
once the command has been issued and the controller has worked out its scheduling it will
respond to the host with an lecreatebigcomplete event core vol part e sect
containing the actual parameters which it has chosen to use as shown i n table
some of these are used by the host application others will reflect what is in the biginfo
the data structure which informs scanning dev ices of the configuration of the broadcast
isochronous stream s
parameter description used in
subevent code xb subevent code for the
lecreatebigcomplete event host
status set to if the big could be successfully
scheduled otherwise set to when an error code
is available host
bighandle the same big handle the host sent in its
lecreatebig command host
bigsyncdelay the maximum time for transmission in
microseconds of all pdus of all bises in a single
big event using the actual parameters included
below host
transportlatencybig the actual transport latency for the big in
microseconds this covers all big events used
for an sdu host
phy the phy that will be used for transmission biginfo
nse the number of subevent s for e ach bis biginfo
bn the burst number the number of new payloads
in each bis event biginfo
pto the offset used for pre transmissions biginfo
irc the immediate repetition count the number of
times a payload is transmitted in each bis event biginfo
maxpdu the maximum size of the payload in octets biginfo
isointerval the value of the isochronous interval the time
between consecutive big anchor points
expressed as a multiple of msecs biginfo
numbis the to tal number of bises in the big biginfo
connection handlei a list of connection handles for all of the bises
in the big host
table parameters returned by an lecreatebigcomplete hci event
section starting a broadcast audio stream
at this point the host has everything it needs to start the process the first stage of which is
to set up the extended advertising and periodic advertising trains it needs to include the
broadcast audio announcements bap and broadcastid bap in the
auxadvind extended announcements and the basic audio announcement including
the base bap an d biginfo
the host uses the hcilesetextendedadvertisingdata command core vol part e
sect and enters the broadcast mode core vol part c sect to start the
extended advert ising then uses the hcilesetperiodicadvertisingdata command
core vol part e sect to populate the base before entering the periodic
advertising mode core vol part c sect
once the e xtended advertisements and the periodic advertising train are established the