When master analog videotape is duplicated, the second-generation copy is usually inferior in quality to the master. This depreciation, known as generation loss, appears as distortion, lack of details, improper colors, etc. The limited frequency response of video and audio magnetic tapes and the imperfections in electronic circuitry are the main causes of generation loss. Video enhancing equipment is intended to eliminate or reduce generation loss. High quality video processors pre-enhance the video signal to overcome generation loss. Digital video recording and editing are essentially immune to high frequency generation loss, but are prone to instability and other synchronization-related problems.
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