TDA18222HN/C1Y

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Part Status:	Obsolete

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Introduction To Linear - Video ProcessingVideo processing has been traditionally divided into two distinct areas – linear and nonlinear. Linear video processing is a way of manipulating recorded data through a series of prescribed steps in order to achieve a desired outcome. Linear video processing techniques can be used to enhance the quality of recorded video, adjust brightness and color balance, remove noise, or extract useful information from the video.TDA18222HN/C1Y application field and working principleTDA18222HN/C1Y is a video amplitude measurement and video line blanking IC for video signal processing in Functional Mid Range (FMR) and Video products (VID). It is intended for both monochrome video and full color video as used in video cameras, camcorders, VCRs and CD-R drives.The TDA18222HN/C1Y IC is designed to measure and detect video amplitude levels from EIA Standard 0.3V peak-to-peak amplitude or higher. This IC contains several programmable functions, such as which line of the video should be measured, the precise point when peak level should be measured, and what magnitude of peak should be detected. When peak of interest is detected, the IC outputs control signals to start and stop video line blanking. This can be used either to blank and restore certain portions of the video or to adjust the brightness and contrast.The TDA18222HN/C1Y IC operates by measuring the peak video amplitude level of a specified video line number, versus a reference voltage, VREF. The reference voltage is user adjustable to accommodate a wide range of video levels. When the detected video amplitude is higher than the reference voltage, the IC outputs a positive voltage on the output pin, indicating that peak level has been detected. This output signal can be used to trigger any necessary video blanking or switching action. The IC is packaged in a 16-pin SSOP (shrink small-outline package) and is available in both 1.8V and 3.3V configurations.ConclusionThe TDA18222HN/C1Y IC is a versatile, powerful tool for linear video processing and can be used in a wide range of applications. From video amplitude measurement to video line blanking applications, the IC’s programmable functions make it very flexible and easy to integrate into existing video systems. Furthermore, its small size and low power consumption make it an ideal choice for use in battery-operated handheld video products.

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