DVDO Quick
6
9
A.04
Audio and Video resolution and routing
When Quick
6
is put into “AVR via HDMI” mode, the full audio capabilities of the AVR (EDID) are scanned
and combined with the best possible video capabilities of the TV (EDID) and the combination is reported
back to all the inputs. In this way, the inputs will send the best possible audio (routed to the AVR) and the
best possible video (routed to the TV). Since the input signal could have a resolution of up to 4K (Ultra HD)
with HD audio, and the TV likely cannot handle HD audio, Quick
6
mutes the audio going to the TV when the
AVR is on. HD Audio includes Dolby TrueHD as well as DTS-HD Master Audio formats.
When the AVR is disconnected or powered off, only the audio capability of the TV (normally just PCM stereo)
is reported back to the inputs and the TV audio is unmuted. In this way the user can choose to watch a
program just with the TV’s audio (AVR off) or with full surround sound from the AVR (no audio from the TV).
This special negotiation only happens if the AVR is connected to the Aux HDMI output.
When Quick
6
is put into “AVR via S/PDIF” mode, the video capabilities of the TV (EDID) are scanned and
combined with a pre-stored capability list of a standard AVR connected through S/PDIF and the combination
is reported back to all the inputs. This is necessary since capabilities cannot be read through S/PDIF. This
allows a full TV resolution of up to 4K while delivering the full audio capabilities possible over S/PDIF
including bitstream (Dolby, DTS and other formats). In this mode, Quick
6
also mutes the audio going to the
TV to prevent formats unknown to the TV from causing unwanted noise.
Since there is no way to detect if the AVR is on or off through S/PDIF, if the user wants to use the TV
speakers, the output mode must be switched back to Mirror or “AVR via HDMI” manually.
