FIFO
HDMI
Core
X
X
1
1
1
1
1
1
HDMI_WP_AUDIO_CFG[23:16]
AUDIO_CHANNEL_LOCATION
Stuffing data [0000]
Audio data [31:0]
Audio data [31:0]
LOOP
Channel 8
Channel 7
Channel 6
Channel 5
Channel 4
Channel 3
Channel 2
Channel 1
1
0
Preliminary
Architecture
www.ti.com
shows an example with the CEA channel/speaker allocation code 7h and only three stereo
channels enabled in the HDMI core. This format is also supported with the four channels enabled, but
channel 7/8 must be cleared to 0.
Figure 6-7. Audio Data Stuffing Behavior with Only Three Stereo Channels Active
6.2.9.2.3.3 IEC 61958 Format
In the IEC 61958 format (
), the channel status and user data bits are supplied with the audio
data.
The valid bits are supplied with the audio data but may be overridden based on the audio FIFO
operation(forced to invalid, if FIFO data is invalid). They may also be forced to valid or invalid.
This format supports only two channels (stereo) or two monophonic channels.
The audio FIFO can be filled directly with data aligned with the 60958 format. In this case, the VUCP
and the preamble data are available.
Table 6-15. IEC 60958 Sample Format
Order
Bits [31:28]
Bits [27:4]
Bits [3:0]
1
VUCP
Left - Channel 1
Preamble
2
VUCP
Right - Channel 2
Preamble
6.2.9.2.3.4 IEC 61937 Format
The IEC 61937 format (
) is similar to the IEC 61958 format, with multichannel supported.
Table 6-16. IEC 60937 Format
Order
Bits [31:28]
Bits [27:4]
Bits [3:0]
1
VUCP
Left - Channel 1
Preamble
2
VUCP
Right - Channel 2
Preamble
3
VUCP
Left - Channel 3
Preamble
4
VUCP
Right - Channel 4
Preamble
5
VUCP
Left - Channel 5
Preamble
6
VUCP
Right - Channel 6
Preamble
714 High-Definition Multimedia Interface (HDMI)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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