How the NSA Converts Spoken Words Into Searchable Text

“Top-secret documents from the archive of former NSA contractor Edward Snowden show the National Security Agency can now automatically recognize the content within phone calls by creating rough transcripts and phonetic representations that can be easily searched and stored.  Though perfect transcription of natural conversation apparently remains the Intelligence Community’s ‘holy grail,’ the Snowden documents describe extensive use of keyword searching as well as computer programs designed to analyze and ‘extract’ the content of voice conversations, and even use sophisticated algorithms to flag conversations of interest.”

https://firstlook.org/theintercept/2015/05/05/nsa-speech-recognition-snowden-searchable-text/

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