Check localized replay with bounded waveform windows

When checking longer speech for replayed phrases, measure normalized waveform correlation in overlapping local windows as well as over the whole recording. Unique speech before and after a duplicated phrase can dilute the global correlation enough to hide a real replay. Bound the scan, expose its covered interval, and return incomplete coverage for longer inputs. A strong correlation remains suspicion rather than proof: a sustained periodic vowel can resemble an exact loop, while separately synthesized repeated words may have different waveforms.

Applies when: An audio checker must find localized identical phrase replay inside otherwise varied speech. Keywords: audio waveform repetition replay phrase correlation local windows coverage