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7. Programmers' Reference
Identifier
Parameter description
<a>
Audio type
<b>
Sampling frequency
Audio codec type
<c>
(not specified in many
cases)
<d>
Audio channel number
<ee>
Sampling frequency
and sample size
(encoded in HEX
format and represented
by binary format)
<ff>
Speaker locations
Parameter values
0 = no audio data is present
2 = Compressed audio
1 = PCM audio
4 = High bitrate audio
J = 768 kHz
A = 44.1 kHz
K = 96 kHz
C = 48 kHz
M = 176.4 kHz
D = 32 kHz
O = 192 kHz
E = 22.05 kHz
B = no information
G = 24 kHz
I = 88.2 kHz
0 = undetermined
7 = DTS
1 = IEC 60958PCM
8 = ATRAC
2 = AC3
9 = One Bit Audio
3 = MPEG-1 (Layers 1&2)
A = Dolby Digital
4 = MP3 (MPEG-1 Layer 3)
B = DTS-HD
5 = MPEG-2 (multichannel)
C = MLP
6 = AAC
0 = not specified
0..7 = channel number is equal to (<d>+1)
7-5 bits:
4-2 bits:
1-0 bits:
reserved and shall
000 = unspecified
00 = not specified
be 0 (zero)
001 = 32 kHz
01 = 16 bit
010 = 44.1 kHz
10 = 20 bit
011 = 48 kHz
11 = 24 bit
100 = 88.2 kHz
101 = 96 kHz
110 = 176.4 kHz
111 = 192 kHz
example:
0F = 000 011 11
48 kHz sampling frequency and 24 bit sample length
This byte describes how various speaker locations are
allocated to the audio channels:
FR/FL = Front Right / Front Left
LFE = Low-frequency effect
FC/RC = Front Center / Rear Center
RR/RL = Rear Right / Rear Left
FRC/FLC = Front Right Center / Front Left Center
RRC/RLC = Rear Right Center / Rear Left Center
See the following table for the possible values.
MX8x8HDMI-Pro series – User's Manual
<ff> value
8
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
RRC
11
RRC
12
RRC
13
RRC
14
FRC
15
FRC
16
FRC
17
FRC
18
FRC
19
FRC
1A
FRC
1B
FRC
1C
FRC
1D
FRC
1E
FRC
1F
FRC
Channel number
7
6
5
4
3
LFE
FC
FC
LFE
RC
RC
LFE
RC
FC
RC
FC
LFE
RR
RL
RR
RL
LFE
RR
RL
FC
RR
RL
FC
LFE
RC
RR
RL
RC
RR
RL
LFE
RC
RR
RL
FC
RC
RR
RL
FC
LFE
RLC
RR
RL
RLC
RR
RL
LFE
RLC
RR
RL
FC
RLC
RR
RL
FC
LFE
FLC
FLC
LFE
FLC
FC
FLC
FC
LFE
FLC
RC
FLC
RC
LFE
FLC
RC
FC
FLC
RC
FC
LFE
FLC
RR
RL
FLC
RR
RL
LFE
FLC
RR
RL
FC
FLC
RR
RL
FC
LFE
42
2
1
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
FR
FL
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