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The ICASSP 2024 Speech Signal Improvement Challenge is intended to stimulate research in the area of improving the speech signal quality in communication systems. The speech signal quality can be measured with SIG in ITU-T P.835 and is still a top issue in audio communication and conferencing systems. To improve SIG the following speech impairment areas must be addressed: coloration, discontinuity, loudness, and reverberation. This is the second Speech Signal Improvement challenge, with the first held at ICASSP 2023. We improve on that challenge by providing a dataset synthesizer to allow all teams to start at a higher baseline, an objective metric for our extended P.804 tests, and we add Word Accuracy (WAcc) as a metric. We provide a real test set for this challenge, and the winners will be determined by subjective test (using an extended crowdsourced implementation of ITU-T P.804) and WAcc.
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