TDA9171

INTEGRATED CIRCUITS DATA SHEET TDA9171 YUV picture improvement processor based on histogram modification and blue stretch Preliminary specification Supersedes data of 1995 Aug 01 File under Integrated Circuits, IC02 1996 Jun 17 Philips Semiconductors Preliminary specification YUV picture improvement processor based on histogram modification and blue stretch FEATURES Picture content dependent non-linear Y and U,V processing by luminance histogram analysis TV standard independent Incredible blue stretch Optional YC-processing. GENERAL DESCRIPTION The TDA9171 is a transparent analog video processor with YUV input and output interfaces. The luminance transfer is controlled in a non-linear way by the distribution, in 5 discrete histogram sections, of the luminance values measured in a picture. As a result, the QUICK REFERENCE DATA SYMBOL VCC supply voltage PARAMETER MIN. 7.2 − TYP. TDA9171 contrast ratio of the most important parts of the scene will be improved. So as to maintain a proper colour reproduction the saturation of the −U and −V colour difference signals are also controlled as a function of the actual non-linearity in the luminance channel. Optionally, the YUV blue stretch circuitry can be activated which offsets colours near white towards blue. The supply voltage is 8 V. The device is contained in a 20 lead dual in-line package. MAX. 8.8 V UNIT ORDERING INFORMATION TYPE NUMBER TDA9171 PACKAGE NAME DIP20 DESCRIPTION plastic dual in-line package; 20 leads;...