This paper studied on real-time computation of generalized time-frequency representations （GTFRs ）and its optimizing. From the conception of generalized local autocorrelation

we discuss the problem that real-time computation of GTFRs can be performed by means of short time processing. Furthermore

this paper proposes an algorithm optimized in such two aspects as: （1） reducing the computational complexity more than twice by taking advantage of conjugated symmetry of the kernel function for some GTFRs ; （2） deducing a time domain recursive algorithm for the computation of analytic signals accurately with any frame shift interval.