  This work is devoted to the development of the octonion linear canonical
transform (OLCT) theory proposed by Gao and Li in 2021 that has been designated
as an emerging tool in the scenario of signal processing. The purpose of this
work is to introduce octonion linear canonical transform of real-valued
functions. Further more keeping in mind the varying frequencies, we used the
proposed transform to generate a new transform called short-time octonion
linear canonical transform (STOLCT). The results of this article focus on the
properties like linearity, reconstruction formula and relation with 3D
short-time linear canonical transform (3D-STLCT). The crux of this paper lie in
establishing well known uncertainty inequalities and convolution theorem for
the proposed transform.
