(China (Mainland))
Product Summary
The TDA9178T is a transparent analog video processor with YUV input and output interfaces. It offers three main functions: luminance vector processing, colour vector processing and spectral processing. Beside these three main functions, there are some additional functions. In the luminance vector processor of the TDA9178T, the luminance transfer function 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 contrast ratio of the most important parts of the scene will be improved. Black restoration of the TDA9178T is available in the event of a set-up in the luminance signal. A variable gamma function, after the histogram conversion, offers the possibilities of alternative brightness control or factory adjustment of the picture tube.
Parametrics
TDA9178T absolute maximum ratings: (1)VCC supply voltage 7.2 to 8.8 V, 8.0 V typ; (2)Vi(Y) luminance input voltage (excluding sync) AMS = 0 - 0.315 to 0.45 V; (3)AMS = 1: 1.0 to 1.41 V; (4)Vi(UV) UV input voltage: 1.9 V; (5)VFS(ADC) full-scale ADC input voltage: 2.0V.
Features
TDA9178T features: (1)Picture content dependent non-linear Y, U and V processing by luminance histogram analysis; (2)Variable gamma control; (3)Adaptive black and white stretch control; (4)Skin tone correction; (5)Green enhancement; (6)Blue stretch; (7)Luminance Transient Improvement (LTI); (8)Smart peaking for detail enhancement; (9)Colour Transient Improvement (CTI); (10)SCAn VElocity Modulation (SCAVEM) output; (11)Line Width Control (LWC); (12)Video Dependent Coring (VDC); (13)Colour Dependent Sharpness (CDS); (14)Noise measurement; (15)Feature Mode (FM) detector; (16)Cue Flash (CF) detector; (17)Three additional pins for access to 6-bit ADC and I2C-bus.
Diagrams
