Our recording adapter system does indeed output the exact same quality
digital signal on the firewire that is received by the set top box.
The DVI signal could be exactly derived from the firewire signal. Firewire
and DVI are equal as far as quality, but it is the firewire based signal
that is suitable for use with our recording adapters.
You mentioned "recompression" by the deck. This is something that deck
might do with firewire signals that originated from a miniDV camcorder, or
with copy protected HDTV tape sources. However, when used with HDTV sources
that originate from received broadcasts and output onto the firewire by our
recording adapters, I do not believe that the deck perfroms any
recompression of the signal.
One item that needs explanation is that even though TVs and computers may
each have a firewire port, this does not imply that these device can
electronically talk to each other. In fact, unless the devices are exactly
and particularly intended to interoperate, they will probably not
We are not currently specifying that our product interoperates with display
devices such as the Mitsubishi TV via firewire.
Currently there is a way to use the firewire output from the recording
adapter we sell for the DTC100 with a PC when used with reception of a
terrestrial OTA H/DTV signal. This is discussed on our web page. This is
when the AVX1 is not selected. That is, the PC has selected the DTC100's
firewire as the input source.
Our AVX1 product that is needed for most satellte HDTV deck based recording
does not currently support this same type of interoperation with PCs. Thus,
signals that originate from a satellite source cannot currently be used
directly with a PC. Even though the signal is put out on the firewire, the
PC doesn't understand what to do with it.
There is a work around where the satellite HDTV signal can first be recorded
to tape, and then imported to the PC.
We are planning to update to the AVX1 software to allow it to interoperate
with a PC. In much the same way as the AVX1 currently makes the satellite
HDTV signal compatible with the deck, that update will permit the AVX1 to
make the satellite HDTV signal compatible with a PC, which it currently is
not. When this update is officially announced and shipping, it would then
be possible to send the satellite originating HDTV signal to the PC for
storage, retreival, and playback.
Viewing of the signal on the PC is being facilitated by products from other
vendors. If a compatible firewire HDTV signal was provided to the PC, this
should be sufficient to allow a PC based hardware or software HDTV decoder
(provided by others) to display the signal on the PC. It is not desirable
to use DVI for this. DVI is particularly only suited for use with display
Although the end result of what a PC does also goes to a display device, the
PC is not itself a display device. It is the monitor that is a display
device. In the instance of a notebook computer where the display is
integrated into the hardware and a direct input is probably not provided, it
might still be possible to display HDTV input from firewire, storage, or
communication based sources. Doing this this would depend on PC hardware
and software that is currently outside the realm of what our company
supports, though other companies might support this.
I think this information will help to convey what our system currently
supports and why this is not currently meeting your needs.