On Fri, 13 Feb 2009 05:24:09 -0500, "dadiOH"
wrote:

David Nebenzahl wrote:
Keep in mind this is just me musing about what would be a nice feature
in digital TVs (and converter boxes), not something that actually
exists, so far as I know.

JVC has/had it.
My SA Explorer 8300HD (Time Warner Cable DVR) has it.