Large corpora best suited to building good acoustic models) must be Although there are aįew instances of small FOSS speech corpora that could be used toĬreate acoustic models, the vast majority of corpora (especially The reason for this is that Free and Open Source ('FOSS') projects areĬorpora with restrictive licensing. the speechĬorpus) used to create the acoustic model. They do not give you access to the speechĪudio and transcriptions (i.e. (or Speech-to-Text) engines are closed source. Most acoustic models used by 'Open Source' speech recognition With Open Source speech recognition engines such as CMU Sphinx, ISIP, Julius ( github) and HTK (note: HTK has distribution restrictions). Make available all submitted audio files under the GPL license, and then 'compile' them into acoustic models for use VoxForge is an open speech dataset that was set up to collect transcribed speech for use with Free and Open Source Speech Recognition Engines (on Linux, Windows and Mac).
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