NCJ Number
188696
Journal
Law Enforcement Technology Volume: 28 Issue: 5 Dated: May 2001 Pages: 30-34
Date Published
May 2001
Length
4 pages
Annotation
This article discusses the technical challenges presented by poor-quality VHS security tape or by highly compressed and potentially suspect closed circuit television video.
Abstract
The two primary systems of video acquisition in the closed circuit television (CCTV) industry are analog and digital. An analog system records to a signal-based medium such as VHS or SVHS videotape. A digital CCTV system produces a data-based signal and records to a hard drive, digital videotape, or to some other digital storage medium. If the primary concern is mass storage, archiving, and instant retrieval of the video image, the digital system is better. If image quality is more important, pictures that the police can work with easily and effectively, analog, preferably SVHS, is the better choice. The article reviews some of the benefits and drawbacks of each system, and factors that can influence the admissibility and acceptability of video images in court. The article concludes that law enforcement video analysts can deal with the technical challenges through a combination of training and the use of proper analysis equipment.