It is also effective in detecting and correcting satellite or FM link threshold noise that normally appears as "sparkles" or streaks. It is, in effect, a means of extending threshold in FM links. The system may also be used as a stand alone dropout corrector for composite NTSC color signals.

Aside from the standard analog-to-digital and digital to analog conversion operations, the system signal processing is all digital. Every video pixel is analyzed and a differentiation between video and noise is made based on the statistical characteristics of unwanted noise and errors. Sophisticated circuits are used to analyze the video signal and search for impulse noise and dropout errors using multidimensional correlation techniques.

To differentiate between impulse noise and moving video details motion is also detected using a number of video frames for temporal correlation detection. When the circuits determine that a particular video pixel has noise perturbation or is in error, and the motion circuits determine that there is no motion in the vicinity of the error, that pixel is replaced with a value predicted from spatio temporal neighboring pixels. All signal processing is performed on the composite color signal, thus avoiding the introduction of video impairments due to color decoding and re-encoding.

Features:

• Input: NTSC color video signal, 1v pp into 75 Ohms Return Loss>40dB
• Output: NTSC color video signal, 1v pp into 75 Ohms Return Loss>35dB
• Frequency Response: +/- 0.5dB to 4.2MHz
• Non Linearity: <2% Differential Phase: <10 plus quantizing effects
• Differential Gain: <1% plus quantizing effects
• K Factor with 2T pulse: Better than 1%
• System Delay: 1 TV Field nominal
• Power Requirement: 120v AC, 60 Hz, 15 Watts
• Operating Temperature: 32 °F to 110 °F, ambient
• Humidity: 10% to 90% non-condensing
• Mechanical: 1RU cabinet: 1.75”H, 19”W, 10”L; 7Lbs