Enhancing audio enhancement
A major revision of CEDAR Audio’s Trinity audio surveillance system has resulted in a ‘huge expansion’ of the recording, listening and speech enhancement capabilities, promises the manufacturer. In the original version, only eight audio streams could be ‘live’ at any given time and a maximum of only two could be viewed. But in CEDAR Trinity 2, the Project is now described as a wrapper for as many audio assets as may be required and up to 24 channels of audio can be live at any given time. Operators can reportedly view these channels simultaneously, recording as many as required, switching with a mouse click to any feed of interest. These assets are time-stamped with Universal Time Code, now with the correct application of daylight saving time, so that the timing of events can be pinned down with confidence. Assets also include Events, some generated by the system and some inserted by the operator, which can be used to describe activity of interest or real-time transcription of the audio.
Existing audio files can now also be imported into a project for listening, speech enhancement and adding events.
Additionally, the administration level has also been significantly enhanced, and Trinity 2 now allows administrators to decide which operators have access to which assets so that multiple teams can work on specific assets on a single system. To comply with the law in a number of jurisdictions, the ability to erase audio from assets has also been added under strict conditions. A switch has also been added that allows incoming audio to be monitored when no recording is taking place or (for use in jurisdictions where this is not allowed) that mutes the feed unless recording is taking place.
Further enhancements include improvements to the archiving feature, which now allows operators and administrators to restore archived audio to its position in the original asset, allowing teams to revisit surveillance material at any time in the future. Archived audio can also reportedly be used to create new assets should this be required.
One of the most important aspect of Trinity’s audio surveillance, speech enhancement, has also been updated to provide a ‘greatly improved’ noise reduction process based upon the manufacturer’s FNR process. The company states that this makes it possible for all users – novices and experts alike – to obtain significantly better results than before.
Finally, exports as well as assets and archives are now cryptographically signed so that users can use the TVerify utility to see whether anyone has tampered with the audio, while metadata capabilities have been improved so that the user’s ID is added invisibly to events, and the speech enhancement parameters are embedded as metadata in exports.