TC90A30AF

The TC90A30AF is a motion-adaptive 3-dimensional YC separation/NR LSI.A 3-dimensional YC separation/3-dimensional NR system can be easily created by combining this LSI with a 2MEG-bit FIFO memory.TC90A30AF can identify an input signal as a letter box picture with three results. One is to check if there are no-picture areas on upper and lower sides. The second is to check if there is the NRZ flags of the EDTV-2 on the line of 22H and 285H. The last is to check if there is the HH signal of the EDTV-2. Each result can be fixed ON/OFF through IIC bus.

The TC90A30AF has the following features including:(1)Y and demodulated color signal edge enhancer; (2)high-precision motion detection:motion detection independent of Y or C,switch automatically motion detection sensitivity based on motion data for each frame; (3)built-in fsc 8 x PLL; (4)built-in digital HPLL; (5)built-in two 8-bit ADCs (for Y, C input); (6)built-in two 10-bit DACs (for Y, C output); (7)supports 2MEG-bit external FIFO memory (recommended memory MSM51V8221); (8)supports I2C bus (slave address:B2H); (9)3.3 V single power supply; (10)100-pin QFP.TC90A30AF is a three dimension Y/C separation IC which is motion adaptive and specialized in NTSC composite video signals. TC90A30AF has two motion detectors for Y and C signals individually which discriminates between 'motion' area and 'still' area of the picture, gets Y and C signals by applying a 3-line comb filter to the motion area and a 3D comb filter to the still area, and mixes Y and C signals output from each the 3-line comb and the 3D comb filters to get final Y/C separated signals.

The absolute maximum ratings of the TC90A30AF are:(1)storage temperature:-55 to 125; (2)supply voltage:Vss to Vss+4.5V; (3)input voltage:-0.3 to Vdd+0.3V;(4)power dissipation:1530 mW.TC90A30AF provides motion adaptive YNR and CNR functions. Noise signal in an still area of continuous two frames has seldom correlation, so that noise component is reduced after adding frames and dividing recursively. Frame recursive YNR applied to low frequency component of Y signal and demodulated color signal. High frequency component of Y signal discriminated with a 7.16MHz band pass filter applied coring to get high frequency noise, and added to the Y signal passing out of the recursive YNR.