# What is the algorithmic latency of STFT processing?

I was reading this paper, and in section 3 I got a bit confused. It claims that the algorithmic latency is equal to synthesis frame length. If the overlap between two consecutive frames is 50%, the algorithmic latency should be the half of the window size. What am I misunderstanding here?

• it is not about the latency of STFT. – jojek Sep 5 '17 at 20:38
• @jojek can you explain a bit more? – Sounak Sep 5 '17 at 20:46
• The delay is independent of the overlap because you have to wait for a complete block to be filled with new input data before you can do the [transformation$\rightarrow$processing$\rightarrow$inverse transformation] and output a new block of output data which consists - in the case of overlap-add - of the sum of the first samples of the current block and the last samples of the previous last block. (Compare this figure from the Wikipedia page on the overlap-add algorithm.) – applesoup Sep 20 '17 at 17:46