In bimodal handwriting & speech control, the user combines the Human
Output Channels (HOCs) of speech and handwriting in a combined way to
achieve a specific goal. A distinction must be made between textual input
and command input (see Appendix E , i.e. erase ``this''). Alternatively, the user may
draw a deletion gesture and say the name of an object to be deleted.
In the remainder of this section we will consider bimodality in speech and handwriting from two viewpoints: (i) the automatic recognition and artificial synthesis of these HOC data; and (ii), the mere storage and replay of these HOC data. The accent will be on ``Control'', but we have added some information on computer output media (COM), because of the often encountered confusion with respect to the concepts of recognition vs. synthesis. Furthermore, with speech, we mean the audio signal representing spoken text, with ink, we mean the XY-trajectory representing written text. Both signals are functions of time.