In the experiment described here, we allow the ASR a larger right context of size ∆ by taking into account at time t the output of the ASR up to time t − ∆ only.
what the ASR hypothesizes about the interval ]t − ∆, t] is considered to be too immature and is discarded, and the hypotheses about the input up to t − ∆ have the benefit of a lookahead up to t. This reduces jitter, which is found mostly to the very right of the incremental hypotheses.