AES3/SPDIF Stream Format
9-4 ADSP-21368 SHARC Processor Hardware Reference
and the
VALIDITY_A (VALIDITY_B for channel 2) bit is set in the
SPDIF_TX_CTL register. This bit is also set if the corresponding bit
given with the sample is set.
2. User data bit (time slot 29). This bit carries user-specified infor-
mation that may be used in any way. This bit is set if the
corresponding bit given with the left/right sample is set.
3. Channel status bit (time slot 30). The channel status for each
audio signal carries information associated with that audio signal,
making it possible for different channel status data to be carried in
the two subframes of the digital audio signal. Examples of informa-
tion to be carried in the channel status are: length of audio sample
words, number of audio channels, sampling frequency, sample
address code, alphanumeric source and destination codes, and
emphasis.
Figure 9-2. Subframe Format
PREAMBLE
L
S
B
M
S
B
24-BIT AUDIO WORD
VALIDITY
USER
CHANNEL
PARITY
0 3 4 272829 3031
DATA
STATUS
PREAMBLE
L
S
B
M
S
B
20-BIT AUDIO WORD
VALIDITY
USER
CHANNEL
PARITY
0 3 4 272829 3031
DATA
STATUS
78
AUXILIARY
SAMPLE
BITS
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