FAQ - How do you enhance audio and video files?
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How do you enhance audio
and video files?
We use numerous programs, filters and scripts, and can work with any type of file. For example, older recordings many have several cameras sharing the same VCR/DVR input. One method is by having each camera takes its turn being seen. This is called a "Sequenced" video and we invented a tool to accurately separate each camera view into its own recording. We can reverse motion/focus blur, stabilize jitter, correct lighting, sharpen details and extract stills. We offer the only enhancement process that uses a multi-phase Process with color separation. If you would like to learn more and/or try this yourself, read the article Open-source software for the forensic video analyst.
We compensate for poor lighting across the entire video, or within a particular segment, to maximize the identifying characteristics of the people of interest. Likewise, we can obscure, block or darken sensitive items (special agents, license plates, bystanders, etc...). Just make that request on your Order Form.
For audio, we use the industry's most advanced tools (many of our own innovation) to suppress unwanted voices and sounds, and do it so surgically, that the desired speech is significantly clearer. Our voice recognition filters can raise the quietest whisper and suppress the interfering noise. We can also balance speech volume levels and slow everything down for easier transcription. The enhanced dialog can then be transcribed and captioned onto your video.
We have processed evidence in thousands of cases and served as industry educators. Our services are relied upon by law enforcement, prosecutors, defense attorneys, innocence project, and our results frequently make national/international news and popular TV/radio shows. We can enhance any video or audio file, even improving upon the other company’s best efforts. Confidence reflected by the fact that we provide free evaluations, so you can make an informed purchase decision.
Nearly all recording devices compress video to increase the total retention time, often permanently removing over 99% of the video details. Cheap cameras and cell phone videos often suffer from motion blurring and extreme compression methods that cannot be corrected by traditional means. However, our FP System includes custom tools to mathematically reverse these compression, motion blur and clarity issues.
The four main video clarity issues are: Noise (from inferior cameras or recorders, electrical interference, etc.), Blur (from moving objects, focus issues, lens issues, etc.), Lighting (over or under lit areas, excessive backlighting, glare, etc.), and Detail (camera resolution, debris on the camera lens, rain or snow fall, recorder settings, how the video is compressed by the DVR/NVR, etc.). Basic recorders often include lighting adjustments while the more expensive recorders (and after market enhancement software) can address a few of the other issues. However, addressing all of these issues is beyond the DVR/NVR manufacturer's control and far too complex for any automated enhancement solution.
Rapidly moving scenes are a common problem. Whether that motion is from a hand held camera, dash camera or pan-tilt-zoom camera, we use military grade filters to stabilize and enhance shaky video so it becomes easier to watch. We also have exclusive filters to correct for camera aging, motion blur and focus issues (examples). We regularly donate our resources to help Innocence projects and law enforcement shine a brighter light on justice.
HOW WE CLARIFY AND RESTORE YOUR MEDIA FILES
(applied as needed)
NOTE: Salt and Pepper noise are pixels (screen dots) with dramatically different luminance (brightness) from their adjacent pixels. This noise may even vary in hue (color) and is common among inexpensive cameras and under illuminated scenes. These poison pixels are repaired by using information adaptively derived from previous and later video frames (time analysis). Gaussian noise is more subtle and represents a more predictable shift in luminance and hue. Again, adaptive time analysis is used in restoration along with the understanding that, in summation, these deviations will approximate a normal distribution (the Central limit theorem).
The corrective nature of these processes are examples of
NERDY NOTE: Cell phones typically use the h.264 or h.265 Codecs (4x4 Spatial Block Transforms) which creates more ringing artifacts than the older MPEG (8x8 Discreet Cosine Transform block) CoDecs common with most DVRs. It is common for enhancement companies to apply deblocking filters to smooth the ringing and the addition of poison noise (grain) to help our brains perceive edging. This is similar to seeing subjective cloud shapes, but it is marginally effective and leaves the results open to interpretation. This is why our lab applies clarification techniques whenever possible.
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