[mythtv-users] Silicon Dust HDHR5-4K

Gary Buhrmaster gary.buhrmaster at gmail.com
Wed Nov 4 01:54:57 UTC 2020

On Tue, Oct 27, 2020 at 2:44 PM Neil Salstrom <salstrom at gmail.com> wrote:

> In the PDX area (and others from what I
> understand) both the ATSC 3.0 and ATSC 1.0 get mapped to the same
> virtual number.  For example, ATSC 1.0 RF 8 (subchannel 3) gets mapped
> to virtual 8.1 KGW.  At the same time, ATSC 3.0 RF 30 (subchannel 3)
> gets mapped to virtual 8.1 KGW as well.

While everything is still in the state of learning,
it has been somewhat expected that OTA
stations will continue to use the same virtual
number for ATSC 3.0 and ATSC 1.0 as many
stations have spent decades "branding" the
number ("Tune to 2.1 for XXX News at 11pm")
which they are not going to want to change.
For OTA TV's with ATSC 3.0 tuners it would
be expected that the TV choses the best
version possible, which is what most users
would expect to happen.

FWIW, the external recorder does not
care about the RF/program values, it uses
the modern HDHR tuning methods, so if
it tuned 8.1 on an ATSC 3.0 tuner it
would get the ATSC 3.0 channel (and if
it tuned 8.1 on a ATSC 1.0 tuner it would
get the ATSC 1.0 tuner).  Only the legacy
protocols require you to tune by RF
frequencies and program numbers.

Refer to the previous post about some
heuristics that are in the latest version
of the external record that attempts to
sort of try to address some of the issues
with common virtual channels, but be
aware that it is still a work in progress,
and that you still can't playback recordings
with MythTV that are using AC-4 (unless
your AVR supports it).

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