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HDTV Reception Forum - View Post
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Does HDMI carry commands back to the...
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| Topic: | Does HDMI carry commands back to the source? This thread has 4 replies. Displaying all posts. |
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| Post 1 made on Monday October 10, 2005 at 15:51 |
Ernie Bornn-Gilman Yes, That Ernie! |
Joined:
Posts: | December 2001
30,104 |
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I have now seen two situations where it appears that switching an HDMI input resets something in a cable box.
In the system I worked with, I proved that when you switch the HDMI switcher away from the Cable Box, then switch it back, the cable box lands on Channel 1, the video on demand channel.
There is another thread where a cable box's video is being reset, apparently after switching away and back.
Does anybody out there know if HDMI is supposed to carry command or setup information BACK to the source, or does it just have audio and video?
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A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw |
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| Post 2 made on Monday October 10, 2005 at 16:30 |
diesel Senior Member |
Joined:
Posts: | April 2004
1,177 |
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I know the Meridian will carry coms back and forth on HDMI, I don't know who else is doing it.
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| Post 3 made on Monday October 10, 2005 at 18:53 |
Daniel Tonks Wrangler of Remotes |
Joined:
Posts: | October 1998
28,780 |
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It doesn't "normally" carry commands, hower the box does have to negotiate a 2-way connection and HDCP, so I guess it decides it's going to reset after that. I know one of my HDMI DVRs insists on switching from a dedicated output mode to "auto" whenever you use HDMI.
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| Post 4 made on Saturday November 5, 2005 at 10:27 |
DeadAir Long Time Member |
Joined:
Posts: | February 2005
50 |
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The HDMI interface between my Sharp Aquos TV and my Samsung 850 DVD does communicate from the 850 to the Sharp picture view information. The Sharp selects the best picture view aspec for the DVD loaded in the 850. This does not happen on the component or s-video inputs to the TV.
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| Post 5 made on Saturday November 5, 2005 at 18:17 |
Daniel Tonks Wrangler of Remotes |
Joined:
Posts: | October 1998
28,780 |
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Do you mean which widescreen mode - 4:3, 16x9 anamorphic or 16x9 zoom?
Ever since my first DVD player in 1998 it's done that on any type of video output, although the TV has to accept the signal. On a Sony XBR 32" 4:3 it would accept the anamorphic tag, while on my current 60" RPTV it will automatically process 4:3 fullscreen, anamorphic and non-anamorphic widescreen zoom, assuming the DVD is correctly encoded with those tags (many aren't).
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