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7800 MultiFrame Manual
7812DCDA2Q-HD (-AA, –AES4) Dual Path HDTV Down-converter
7.2.
CONFIGURING THE AUDIO SETTINGS
The figure below depicts the 7812DCDA2Q series internal audio architecture. Internally, 16 channels of
audio are processed within the module. The 7812DCDA2Q audio path incorporates auto-sensing audio
sample rate converters that will automatically go into BYPASS mode should non-PCM audio data be
presented to the module. All advanced audio processing steps like 5.1 to stereo down-mixing and adjacent
channel mono-mixing have simultaneous access to all 16 channels of input audio.
Finally, sixteen independent Output Channel Mixers generate sixteen channels of embedded audio output.
These Output Channel Mixers perform any required audio inversions, audio gain adjustments and audio
channel swapping. Using the X and Y inputs of each Output Channel Mixer, an additional level of mono-
mixing is also available.
With the –AA and the –AES4 versions of the 7812DCDA2Q-HD, analog audio/AES audio outputs may
also be generated. There are 4x mono analog audio outputs generated per path for the –AA version and
2x AES outputs per path for the –AES4 version. An additional layer of post Output Channel Mixer audio
routing is available so that the 4x analog audio/AES outputs can have their own independent channel
assignment relative to the embedded audio outputs.
Figure 7-11: Detailed View of 7812DCDA2Q Output Audio Channel Mixers
The Audio control tab is used to configure the on-board audio sample rate converters and the internal
audio delay block. The Audio menu is also used to enable and disable the four internal audio embedders
and to specify C bit processing modes. SRC status, Audio Delay and Video Delay parameters are also
monitored and reported in the Audio menu.
Page 27
Revision 1.0
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