Video/Audio Forensics

Audio and video evidence is often not recorded with great clarity and needs enhanced prior to using in court. An audio and video forensic expert can help.

By enhancing the evidence, an audio/video forensic expert can help the court better see and hear the original events as they occurred. Garrett Discovery’s audio/video forensic experts do not perform computer forensics. The only work they perform is on audio and video data.

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Audio Enhancement

The audio enhancement process is like peeling an onion. Each step of the enhancement process must be strategic and accepted in the scientific community. Audio forensic examiners and experts at Garrett Discovery have been trained and use the latest tools and techniques to enhance audio evidence while maintaining the proper chain of custody. Our audio and video experts do not perform computer forensics.

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How does an audio recording become more clear?

As a rule of thumb, background noise is removed first and the level of dialogue is increased to better hear the conversation and events that are relevant to the case. Other forensic techniques include adjusting filters, equalizers, and compression. The tools that are used and the order in which they are applied are based on both experience and issues found through critical listening. Every audio recording is different, which is why each recording is carefully analyzed and enhanced to best address the specific issues.

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Video Enhancement

Video enhancement is also a strategic process that requires experience. With the digital era of forensic video evidence, playback of forensic video evidence can be a challenge. Various digital file formats, as well as storage issues, can surface very quickly.

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How does video evidence become more clear?

The first step is to load the video evidence into one of our forensic computers, either MAC or PC (depending on the evidence format). The video forensic expert or examiner begins the enhancement process by first viewing the entire video to determine the series of events that need to be more clear so the court can better see the events as they occurred.

Some of the time, the video can be slowed down and enlarged for easier viewing. Sharpening tools and other types of shadow and highlight filtering that is accepted in the scientific community are applied to make the series of events more clear. Frames are often exported and turned into digital still images, then clarified outside the video environment. This helps the court identify persons or other events in the video that are hard to see in the video format, especially when difficult playback issues arise.

Transcripts

We at Garrett Discovery can provide certified transcripts of the audio or video recording with a timeline of events. The transcripts can either be created by our staff or a certified court reporter.