Header: Two eighth = dotted eighth and sixteenth

[Andreas Loosen]

Hey,

I would like to add a header line, above the score, that tells the reader,
that two eighth notes printed in the score
are to be played as one dotted eighth and one sixteenth (for better
readability).
I've seen this on some score,  it was done by printing two eighths on a
single line, then an equal sign,
then the dotted eighth and a sixteenth on a single line.
(Hope you got, what I meant, it's a bit tricky to explain).

Is this possible with lilypond?

Thanks
  Andreas