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Dialog Enhancement via Spatio-Level Filtering and Classification

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Dialog enhancement (DE) is a feature that allows a listener to increase the level of dialog in a content item relative to backgrounds. DE is “unguided” if only the finished mix is available, meaning that a DE system must estimate the dialog. Spatio-Level Filtering (SLF) is a source separation technology that, when combined with dialog classification, allows for high-quality unguided DE for typical entertainment content in a stereo or higher channel count format. SLF exploits spatial and level information and requires little lookahead, memory, computation and training data. To evaluate results, we conduct two subjective listening experiments which indicate favorable performance.

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