Abstract: A method of sampling phase calibration and a device thereof is suitable for an analog-to-digital converter and phase lock loop (ADC-PLL). The ADC-PLL conducts sampling on a periodic analog signal according to a sampling phase so as to produce a plurality of digital signals. The sampling phase calibration device includes a storage unit, a motion-detecting unit and a control unit. The motion-detecting unit is to calculate the number of motion data corresponding to a sampling phase. The control unit is coupled to the motion-detecting unit for changing the sampling phase so as to obtain the number of motion data corresponding to each sampling phase and selecting the sampling phase corresponding to the minimum number of motion data as an optimal sampling phase. The ADC-PLL can correctly sample an analog signal by using the optimal sampling phase and reduce the influence of clock jitter to the minimum.

Abstract: In a de-ring system for reducing the overshooting and undershooting of a video signal after scaling on the horizontal and the vertical direction in a scaler, a region judgment device receives the video signal and detects the attributes of the region in the video signal. When the region in the video signal is an edge and flat area, the de-ring system adjusts the weighting coefficient to increase the low frequency components for reducing the overshooting and undershooting of the video signal. When the region in the video signal is neither an edge nor an edge and flat area, the de-ring system adjusts the weighting coefficient to increase the high frequency components for preserving the high frequency components of the video signal, so as to dramatically reduce the overshooting and undershooting of a video signal.

Abstract: A method of sampling phase calibration and a device thereof is suitable for an analog-to-digital converter and phase lock loop (ADC-PLL). The ADC-PLL conducts sampling on a periodic analog signal according to a sampling phase so as to produce a plurality of digital signals. The sampling phase calibration device includes a storage unit, a motion-detecting unit and a control unit. The motion-detecting unit is to calculate the number of motion data corresponding to a sampling phase. The control unit is coupled to the motion-detecting unit for changing the sampling phase so as to obtain the number of motion data corresponding to each sampling phase and selecting the sampling phase corresponding to the minimum number of motion data as an optimal sampling phase. The ADC-PLL can correctly sample an analog signal by using the optimal sampling phase and reduce the influence of clock jitter to the minimum.

Abstract: A system for decoding and de-interlacing CVBS signal includes a 2D luminance and chrominance separator, a chrominance to color difference converter, a synchronization and scaling device, a storage and a 3D luminance and chrominance separation, de-noise and de-interlacing device. The 2D luminance and chrominance separator generates 2D luminance and chrominance signals based on sampled CVBS signal. The chrominance to color difference converter converts the 2D chrominance signal into 2D color difference signal. The synchronization and scaling device synchronizes the sampled CVBS signal, 2D luminance signal, and 2D color difference signal for generating synchronized CVBS signal, synchronized 2D luminance signal, and synchronized 2D color difference signal. The storage buffers the synchronized CVBS signal, synchronized 2D luminance signal, and synchronized 2D color difference signal.

Abstract: In a de-ring system for reducing the overshooting and undershooting of a video signal after scaling on the horizontal and the vertical direction in a scaler, a region judgment device receives the video signal and detects the attributes of the region in the video signal. When the region in the video signal is an edge and flat area, the de-ring system adjusts the weighting coefficient to increase the low frequency components for reducing the overshooting and undershooting of the video signal. When the region in the video signal is neither an edge nor an edge and flat area, the de-ring system adjusts the weighting coefficient to increase the high frequency components for preserving the high frequency components of the video signal, so as to dramatically reduce the overshooting and undershooting of a video signal.