The SAA4945H, LIMERIC (LIne MEmory noise Reduction IC) is a 2-D recursive noise reduction filter for both luminance and colour difference signals. The noise reduction is automatically adapted to the global noise level in the image. Ten different preferences of noise reduction can be set using a synchronous receiver transmitter bus; SNERT (Synchronous No parity Eight bit Receive Transmit) bus. Alternatively, the noise reduction can be switched off. The LIMERIC is generally placed directly after the ADC in the video chain.
The document describes the SAA4945H, also known as LIMERIC (Line MEmory noise Reduction IC), which is a 2-D recursive noise reduction filter designed for luminance and colour difference signals. It features automatic adaptation to global noise levels within the image content and supports ten different selectable preferences via the SNERT bus.
| Supply Voltage | 4.5 to 5.5 V |
|---|---|
| Supply Current | 70 mA |
| Power Dissipation | 350 mW |
| Clock Frequency | 10 to 16 MHz |
| SNERT Bus Clock Frequency | 1 MHz |
| Operating Temperature | 0 to 70 °C |
The device operates within an ambient temperature range of 0 to 70 °C.
The fixed line locked clock operation frequency is up to 16 MHz.
Ten different types of noise reduction are selectable via the SNERT bus.