As reported by 9to5Mac:
“Based on what Apple is testing, future versions of iOS could allow an iPhone, iPad, or iPod touch to process and convert speech from a user right on the device itself. This would speed up the process considerably, allowing emails, text messages, notes, and web searches take place via voice quicker than ever. The functionality is currently not active in public-facing builds, but we are told that devices internal to Apple have the function up and running.”
Well, this was expected from Apple. But still, Apple tests out a lot of new features in its beta builds. And this is just a LOC and not a entire framework that resides inside the iOS 7’s system.