Abstract:
PURPOSE: A scene conversion detection apparatus is provided to determine scene conversion by using a difference image between frames of an image. CONSTITUTION: A brightness calculation unit(120) extracts pixel brightness data of a current frame in an input image. The brightness calculation unit extracts brightness feature values of the current frame. A histogram calculation unit(130) extracts the histogram feature value of the current frame. A comparison unit(160) compares the brightness feature value with the histogram feature value. A scene conversion determination unit(170) determines a scene conversion frame according to a set rule.
Abstract:
PURPOSE: A direct digital frequency synthesizer and a method thereof using a variable sine wave weighting DAC(Digital to Analog Converter) are provided to configure the variable DAC by using a simple logic structure except an operator. CONSTITUTION: A phase accumulator(210) offers phase information by accumulating control words. A nonlinear DAC(282) decides a base point by using the first data with an upper level among the phase information of the phase accumulator. The nonlinear DAC generates a coarse segment current in correspondence with the base point. A variable DAC part(283) varies a weighted value of the segment selected among the phase information according to the second data with a lower level based on the base point. The variable DAC generates a fine segment current weighted by a sine function.
Abstract:
본발명은고속동작을위한전류모드로직회로에관한것으로서, 더욱상세히는 10Gbps 초고속수동형광네트워크에적용되는고속장치의고속동작을지원하는고속동작을위한전류모드로직회로에관한것이다. 본발명은커패시터의전압변화특성을이용하여인덕터와같은면적이큰 소자를사용할필요없이낮은입력전압으로높은이득의출력을제공하여선형성을향상시키는동시에고속동작을지원할수 있으며, 고속동작에요구되는입력전압을낮출수 있어전력소모를절감할수 있을뿐 아니라 PVT(process, voltage and temperature) 변화에둔감하여추가적인옵션이요구되지않아회로의복잡도를크게개선한전류모드로직회로를제공하는효과가있다.