Abstract: Provided is a piezoelectric device including at least two piezoelectric plates configured to include at two contact points, wherein the at least two piezoelectric plates include at least two resonant frequencies. The piezoelectric device in a wearable device operates as at least any one of a piezoelectric sound device and a piezoelectric vibration device.

Abstract: Provided is a piezoelectric device including a first piezoelectric plate, a vibration plate provided to contact one surface of the first piezoelectric plate, and at least one second piezoelectric plate provided to contact the vibration plate, wherein the first and second piezoelectric plates have different resonant frequencies.

Abstract: Provided is a piezoelectric device including a first piezoelectric plate, and at least one second piezoelectric plate configured to contact at least one area of the first piezoelectric plate, wherein the first and second piezoelectric plates have different resonant frequencies.

Abstract: Provided is a sensor including an insulating layer, at least two heater patterns separated in one direction in the insulating layer and electrically connected to each other, at least two sensing electrode patterns insulated form the heater patterns, separated in the one direction in the insulating layer, and electrically connected to each other, and a sensing material, at least a part of which is buried in the insulating layer to contact the sensing electrode patterns.

Abstract: Disclosed is a sensor device including a plurality of substrates vertically stacked, a plurality of heaters formed on at least one selected substrate and separated from each other in a horizontal direction, a plurality of sensing electrodes formed at least one selected substrate on a top portion of the substrate on which the plurality of heaters are formed and separated in the horizontal direction, and a plurality of materials configured to respectively contact the plurality of sensing electrodes and formed separately from each other.

Abstract: Provided are a complex device including a piezoelectric device, a wire patch cell (WPC) antenna disposed on one surface of the piezoelectric device, the WPC antenna being connected to two antenna patterns that are vertically spaced apart from each other, and a near field communication (NFC) antenna disposed outside the WPC antenna and an electronic device having the same.

Abstract: Provided are a sound amplification box and a sound amplification device. The sound amplification box includes a body including a predetermined resonance space therein and having a surface contacting an electronic device, a resonance hole formed in at least one surface of the body, and a vibration transmission part in a predetermined region of the surface contacting the electronic device.

Abstract: A video signal processing apparatus may include a frame memory and a separator and deinterlacer circuit. The frame memory may store an interlaced video signal. The separator and deinterlacer circuit may execute operations of separating and deinterlacing the interlaced video signal stored in the frame memory. The apparatus may output a sequential video signal. A data processing system may include the video signal processing apparatus. A method for processing video signals may include storing an interlaced video signal in a frame memory and executing operations of separating and deinterlacing the interlaced video signal stored in the frame memory. The method may also include outputting a sequential video signal.

Abstract: For spatial resolution conversion of an image signal, a magnitude of a motion vector is compared to a threshold value. Single channel interpolation is performed if the magnitude of the motion vector is greater than a threshold value, and multi-channel interpolation is performed otherwise. In addition, single channel interpolation is performed for spatial resolution conversion of any frame that does not refer to another frame.

Abstract: A synchronization detecting apparatus includes a counter, an error detector, and a line length generator. The counter counts to a predetermined counter value in response to a clock signal. The error detector generates an error, which is the difference between a current counter value received from the counter and a previous line length, in response to a synchronization flag signal. The line length generator generates a current line length based on a compensated error and the predetermined counter value. The synchronization flag signal has an active level at a transitioning edge of a synchronization pulse signal contained in an input signal.

Abstract: A video decoder removes noise caused by a luminance signal component when separating a chrominance signal from a composite video baseband signal. The video decoder includes a first signal generator generating a first signal, a second signal generator generating a second signal, a third signal generator differentiating the first and second signals and performing a predetermined operation on the differentiated signals to generate a third signal, an operating unit performing a predetermined operation on the third signal to output the chrominance signal, a fourth signal generator performing a predetermined operation on the first and second signals to generate a fourth signal having a value corresponding to the amplitude of the chrominance signal, and a noise removal unit correcting the chrominance signal in response to the third and fourth signals to remove luminance component noise included in the chrominance signal.

Abstract: A post-processing circuit for processing an image signal according to frequency components of an image signal includes: a low-frequency extracting unit outputting a low-frequency image component of the image signal as a low-frequency signal; a high-frequency extracting unit multiplying a high-frequency image component of the image signal by a first gain and outputting the multiplication product as a high-frequency signal; an intermediate-frequency extracting unit multiplying an intermediate-frequency image component of the image signal by a second gain and outputting the multiplication product as an intermediate-frequency signal; and an adder adding the low-frequency signal, the high-frequency signal, and the intermediate-frequency signal and outputting the addition sum as a post-processed signal, wherein the first gain and the second gain are differently set according to a pixel location in a spatial domain.

Abstract: A motion detection apparatus detecting motion in an image may include a black-and-white signal motion detector, a first color signal motion detector, a second color signal motion detector, and a final motion flag output unit. The motion detection apparatus may output a final motion flag in accordance with whether there is motion in a black-and-white image, whether there is first color motion in a color image, and whether there is second color motion in the color image. The motion detection apparatus may control a threshold value used to determine whether there is motion in an image in the present frame in response to accumulated information about whether there has been motion in the image for a predetermined past frame through to the previous frame.

Abstract: A digital video signal processing apparatus and method for compensating a chrominance (C) signal includes receiving the C signal separated from an input video signal and compensating the C signal in at least one dimension thereof to generate a compensated C signal. A comparator may determine whether a portion of a Y signal in the input video signal is present in the C signal. The compensator may compensate the C signal only when the comparator determines a portion of the Y signal is present in the C signal. The comparator may calculate a variation between current C data of the input video signal and adjacent C data and compare the variation to a threshold value.

Abstract: An adaptive digital video signal processing apparatus and method for Y/C separation. In the video signal processing apparatus, an adaptive 2D BPF carries out Y/C separation through comb filtering and bandpass filtering selected according to local characteristics of an image (e.g., based on the direction in which an edge in the image extends in vertical and horizontal directions. The adaptive 2D BPF performs 2D bandpass filtering in general case. The 2D BPF adaptively executes a series of selections of the various filtering operations in a continuous manner.

Abstract: Sync positions are detected from a video signal. The detected sync positions are processed (e.g., averaged) to generate modified sync positions. The detected sync positions and the modified sync positions are selectively used to sample and synchronize a color signal derived from the video signal. For example, the detected sync positions and the modified sync positions may be selectively used to sample and synchronize the color signal responsive to differences between the modified sync positions. The invention may be embodied as apparatus and/or methods.

Abstract: Video signal processing systems and methods for detecting horizontal synchronization signals within video signals. Digital filtering methods are implemented for processing analog video signals to determine time varying characteristics of video signals to detect the starting and ending positions of horizontal synchronization pulses in a video signal with increased accuracy. In addition, adaptive methods are implemented for dynamically determining various video signal parameters over time, such as blanking level BL, threshold value (slice) level and synchronization level SL using information extracted from digitally filtered video signals.

Abstract: A digital processing system and method for tracking a subcarrier included in a video signal are provided, where a phase comparator tracks the phase of a color burst signal based on predetermined supposed phases, Y/C separation and demodulation are carried out based on a compensation phase that is updated by a phase compensator in response to the tracked phase, and the Y/C separation and demodulation are performed based on a compensation frequency determined by a frequency compensator by checking short-term and long-term variations in the updated compensation phase.

Abstract: A circuit for reducing cross-color artifacts in video data can include three luminance/chrominance (Y/C) separator circuits each configured to provide sets of chrominance coordinates based on a respective three contiguous composite video frames. A first circumcircle calculator circuit is coupled to the three Y/C separator circuits and is configured to provide a circumcircle for a set of chrominance coordinates corresponding to the first, second and third contiguous composite video frames. A second circumcircle calculator circuit is coupled to the three Y/C separator circuits and is configured to provide a circumcircle for a set of chrominance coordinates corresponding to the second and third contiguous composite video frames and a fourth contiguous composite video frame. Related methods and computer program products are also disclosed.

Abstract: A digital video signal processing apparatus and method for adaptive spatio-temporal Y/C separation in multiple directions. In the digital video signal processing apparatus, an adaptive three-dimensional band pass filter (3D BPF) performs Y/C separation using local comb filtering/1D band pass filtering when the edge direction is fixed vertically/horizontally according to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally/vertically, the 3D BPF performs 2D band pass filtering in all directions. Thus, the 3D BPF continuously carries out comb filtering, 1D band pass filtering and 2D band pass filtering according to the spatio-temporal local characteristics of the image.