The Bing Speech Recognition API provides cloud based spoken language analysis and processing. Developers can integrate real time audio recognition via microphone or by sending the audio extracted from a file to the server. Additionally, this API converts spoken audio to intent as supported by the models trained by the Microsoft Language Understanding Intelligent Service (LUIS). 3 pricing options are available, and a free plan that limits transactions to 5,000 a month is available as well. The Speech Recognition API uses JSON format for data exchange, and Tokens for authentication.
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SpeechRecognition is a multiplexing Python SDK that works with multiple SpeechRecognition APIs (the developer chooses). For example, the developer can choose to transcribe speech-to-text using APIs from Google, IBM, Microsoft, and others.