>The biggest problem is that when a new line is shown on screen old one
>gets erased so it is easy to lose some text. Ideally bttv should scroll up
>old line before putting new one.


Scrolling, erasing, italics, color, etc. in U.S. are all part of the FCC
telecommunications spec.  You can get this from their web site.
Just search for something like this:

TITLE 47--TELECOMMUNICATION

            CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION

PART 15--RADIO FREQUENCY DEVICES--Table of Contents

                   Subpart B--Unintentional Radiators

Sec. 15.119  Closed caption decoder requirements for television receivers.

Or, let me know and I will send it to you.

Hope it helps.

    -- Peter





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