TDA9178 is a Philips Semiconductors YUV single-chip image enhancement device with luminance vector-, color vector- and spectral processor. It has picture content dependent non-linear Y, U and V processing by luminance histogram analysis, variable gamma control, adaptive black and white stretch control, skin tone correction, green enhancement, blue stretch, luminance transient improvement (LTI), smart peaking for detail enhancement, colour transient improvement (CTI), scan velocity modulation (SCAVEM) output, line width control (LWC), video dependent coring (VDC), colour dependent sharpness (CDS), noise measurement, feature mode (FM) detector, cue flash (CF) detector, three additional pins for access to 6-bit ADC and I2C-bus, adjustable chrominance delay, TV standard independent, I2C-bus controlled, 1fH and 2fH, demonstration mode (DEMO).
The TDA9178 is a transparent analog video processor with YUV input and output. It provides luminance vector processing, colour vector processing and spectral processing, together with features such as adaptive black/white stretch, variable gamma, skin‑tone correction, green enhancement, blue stretch, smart peaking and cue‑flash detection.
The datasheet includes functional descriptions, pin configurations for SDIP24 and SOT137 packages, quick reference data (e.g., 8 V supply voltage), ordering information and application notes such as limiting values, life‑support warnings and I²C licensing details.
| Supply voltage | 7.2 – 8.8 V |
|---|---|
| Package type (SDIP) | SDIP24, 24‑lead plastic shrink dual in‑line package |
| Package type (SOT) | SOT137‑1, 24‑lead plastic small outline package |
The cue flash output signals when the picture content has changed significantly; it is an active‑LOW pulse on pin CF during one line of vertical retrace.
Adaptive black stretch is enabled by the I²C‑bus bit BON and its gain is set by DAC bits BT5 to BTO.