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STV3550 数据表(PDF) 36 Page - STMicroelectronics |
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STV3550 数据表(HTML) 36 Page - STMicroelectronics |
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36 / 144 page  36/144 STV3550 As an example, the strength of the peaking is adjustable up to 64 steps from 0 to +10 dB. The frequency peaking is adjustable from 1.5 MHz to 3.5 MHz by software (1H domain frequencies). Coring is set using the coring level parameter which gives the strength of the noise suppression in 32 steps. 3.3.8 Color Transient Improvement Color Transient Improvement (CTI) is used to improve color transitions and chroma resolution. It uses a custom filter to enhance chroma transitions. Overshoots and undershoots of correction are suppressed to eliminate incorrect colors at the output of the algorithm. Also small amplitudes are not amplified and are further reduced to suppress noise amplification. Figure 25 shows an example of step enhancement and noise pass through. Figure 25: Step Enhancement and Noise Pass Through 25 20 15 10 5 0 -5 -10 -15 02 468 10 12 = Correction Signal = Input Signal = Peaked Signal |
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