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# Introduction to Speech Processing

HPE IDOL Speech Server encompasses several speech processing functions in a single ACI server. HPE IDOL Speech Server can perform:

- Speech-to-text
- Phonetic phrase search
- Speaker identification
- Spoken language identification
- Transcript alignment
- Audio fingerprint identification
- Audio security

All speech operations are asynchronous because this approach is more suited to speech processing, especially for live speech. You can send separate requests to the server to access results from the processing operations. This feature allows HPE IDOL Speech Server to report and flag relevant events immediately, so that you do not have to wait until the entire file is processed.

HPE IDOL Speech Server supports multiple languages. A single instance of HPE IDOL Speech Server can process several languages simultaneously.

In addition to audio files, HPE IDOL Speech Server can process audio as binary data sent as data blocks or streams. Sending data as a binary block is useful for processing a local file on a remote server that cannot view the local file system. Audio streaming makes real-time data processing possible–for example, converting incoming audio to text as it occurs.

HPE IDOL Speech Server lets you put together combinations of speech processing functions to create custom operations, allowing you to perform several processes simultaneously on audio data.

The following sections introduce the speech processing functions.

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