Abstract: An image format conversion system includes a horizontal filter to receive an image input signal with a frequency of a first clock signal in order to perform a filtering operation to thereby produce a horizontal filtering image signal; a first FIFO to temporarily store the horizontal filtering image signal; a 2D image interpolator to perform a deinterlacing, a vertical interpolation and a horizontal interpolation operations on the horizontal filtering image signal to further produce a scaled progressive image signal; a second FIFO connected to the 2D image interpolator to temporarily store the scaled progressive image signal; an interpolation clock controller to receive a second clock signal and produce multiple enable signals in order to enable the horizontal filter and the 2D image interpolator, wherein the second clock signal has a frequency independent of the frequency of the first clock signal.

Abstract: A color reconstruction system for an SECAM television signal includes a luminance and chrominance separator and color decoder, first and second line buffer blocks, a vertical similarity calculator and a reconstructor. The luminance and chrominance separator and color decoder receives and filters an SECAM television signal with a luminance and a chrominance to produce a luminance signal and a chrominance signal. The first line buffer block temporarily stores the luminance signal. The second line buffer block temporarily stores the color difference signal. The vertical similarity calculator produces an upper similarity coefficient and a lower similarity coefficient based on the luminance signals produced by the luminance and chrominance separator and color decoder and temporarily stored in the first line buffer block respectively.

Abstract: An error corrector with a high use efficiency of a memory includes a memory, a bus device, an input buffer and an error correction module. The memory stores data. The bus device controls a memory access. The input buffer receives and temporarily stores a coded blockcode data, and writes the coded blockcode data in the memory through the bus device. The error correction module reads the coded blockcode data in the memory through the bus device and decodes it in rows and columns to thereby obtain decoded data and check bytes. The error correction module writes the decoded data in the memory through the bus device and discards the check bytes.

Abstract: An image processing device and method is provided to reduce color artifact. A smooth unit performs a smooth operation on color signal corresponding to a pixel and adjacent pixels to generate smooth color signal. A level shifter performs a level-shifting on the smooth color signal to obtain level-shifted color signal. A color strength unit calculates a color strength indicator based on the color signal. A gray level decision unit is connected to the color strength unit for deciding whether the pixel is in a gray level region or not based on the color strength indicators of the pixel and adjacent pixels to generate a gray level indicator. An adjustment unit adjusts the smooth color signal and the level-shifted color signal based on the gray level indicator to generate an output color signal.

Abstract: A clock range setting device including a horizontal counter, a filter unit, a clock detecting unit, a first infinite impulse filter (IIR filter), and a clock range modulator is provided. The horizontal counter counts a horizontal counter value. The filter unit obtains a lead clock of each teletext video signal according to a lead clock range, and generates a corresponding clock intermediate value. The clock detecting unit detects level changes of the lead clock of each teletext video signal according to the clock intermediate value, so as to generate a corresponding current clock cycle number. The first IIR filter generates corresponding number mean value according to the current clock cycle numbers sequentially received by the first IIR filter. The clock range modulator sets the lead clock range corresponding to each teletext video signal according to the current clock cycle number, the number mean value, and the horizontal counter value.

Abstract: A method of recognizing a track pitch of an optical disk, adapted for an optical disk player, is provided. The method includes the steps of driving an optical pickup head to a predetermined position, so that the optical pickup head and the spindle motor are a predetermined distance apart, reading a data sector address, and recognizing the magnitude of the track pitch of the optical disk according to the value of the data sector address.

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 wireless receiver system with automatic gain control, which includes a receiving path, an analog to digital converter, an automatic gain control (AGC) device and a controller. The controller has an adjacent channel interference off mode, an adjacent channel interference acquisition mode and an adjacent channel interference tracking mode to accordingly set the AGC device for adjusting the gains of a plurality of modules of the receiving path. Namely, the strengths of different adjacent channel interferences are appropriately adjusted to thereby obtain the best received signal quality.

Abstract: A limit switch controlling method and apparatus used in an optical drive are disclosed. When the optical drive is executing a tray-in/tray-out action or a move-sled home action, a detect-tray-in-switch pin, a detect-tray-out-switch pin, or a detect-sled-limit-switch pin of a controlling chip is used to receive a signal from a limit switch. When the optical drive is not executing the tray-in/tray-out action or the move-sled-home action, the detect-tray-in-switch pin, the-detect tray-out-switch pin, or the detect-sled-limit-switch pin of the controlling chip is used as an I/O port.

Abstract: A filter, including a direct-current (DC) tracking unit, a subtracter and a control unit, is provided. The DC tracking unit extracts a DC component of a radio-frequency (RF) signal and accordingly generates a level signal. The subtracter subtracts the level signal from the RF signal to generate a RF coupling signal. The control unit determines whether to transmit a setting signal to the DC tracking unit according to the level variation of the RF coupling signal, so as to adjust a characteristic parameter of the DC tracking unit.

Abstract: A method and system for adaptive color space conversion includes a color space converter, a brightness adaptive controller and a soft clipper. The color space converter receives a first color space format signal and converts the first color space format signal into a second color space format signal. The brightness adaptive controller is connected to the color space converter in order to produce a gain and an offset based on a brightness value. The soft clipper is connected to the color space converter and the brightness adaptive controller in order to clip the second color space format signal based on the gain and the offset to thereby produce a corrected second color space format signal.

Abstract: In a method for off-line analyzing crashed programs, a simulator of a debugger is made to enter into a running state, and set breakpoints in the running state. Register and memory signals are separated from a dump signal outputted by a platform during crash. The debugger is used to replace, at the breakpoints, register and memory signals of the simulator originally in the running state with the register and memory signals separated from the dump signal. A debugging signal in the running state is replaced with a debugging signal during crash. The debugger is used to analyze reasons of crash based on the debugging, register, and memory signals after replacement. By separating the register and memory signals from the dump signals outputted by the platform during crash without involving any OS signal, there is no need to modify the platform and the GDB debugger when analyzing the reasons of crash.

Abstract: An automotive virtual surround audio system is implemented in an automobile to receive left- and right-channel audio sources. A synthesizer receives the left- and right-channel audio sources to extend the sources into temporary rear-left and rear-right audio sources. A weighting device receives the left- and right-channel audio sources to perform a weighting operation and produce temporary front-left and front-right audio sources. A first filter receives the temporary front-left and front-right audio sources to perform a filtering operation and produce virtual front-left and front-right audio sources. A second filter receives the temporary rear-left and rear-right audio sources to perform a filtering operation and produce virtual rear-left and rear-right audio sources. Thus, the virtual audio image position is reproduced.

Abstract: A Digital Terrestrial Multimedia Broadcasting (DTMB)-based carrier mode detection system includes first and second TPS decoders, first and second carrier calculators and a determinator. The first and second TPS decoders respectively receive NTPS input signals to thereby produce the corresponding NTPS mask signals and to respectively perform an absolute operation on the corresponding NTPS mask signals to accordingly select a maximum result as first and second absolute maximum mask signals for output. The first and second carrier calculators respectively receive NCS input signals and produce first and second absolute summation carrier signals. The determinator is based on the first absolute maximum mask signal, the first absolute summation carrier signal, the second absolute maximum mask signal and the second absolute summation carrier signal to accordingly determine that the carrier mode is of a multi- or single-carrier mode.

Abstract: A multi-standard integrated television receiver is disclosed. According to the invention, a RF tracking filter is provided to receive a RF signal and then filter out a fifth order and above harmonics and a band-pass filter is provided to further eliminate harmonics. Moreover, a double quadrature mixer is provided to remove third order harmonics. Accordingly, the quality factor requirement of the RF tracking filter and the linearity requirement of the band-pass filter are relaxed. Thus, the RF tracking filter and the band-pass filter can be fully integrated without any external components.

Abstract: An optical storage system and a spherical aberration (SA) compensation apparatus and method thereof are provided. The SA compensation apparatus includes a microprocessor and a digital-signal-processor (DSP). The microprocessor repeatedly regulates a compensation value of an SA compensation driver in the optical-pickup-head (OPH) after the microprocessor has determined the type of an optical storage medium and before the OPH has focused on the optical storage medium. The DSP processes a plurality of electrical signals converted through the OPH whenever the microprocessor has regulated the compensation value of the SA compensation driver, so as to obtain width values of a plurality of focus-error (FE) signals. Accordingly, the microprocessor makes the SA compensation driver to drive an SA compensation unit according to the width values of the FE signals, so as to compensate an SA of the light point generated by the OPH and focused on the optical storage medium.

Abstract: A data recovery device including an analog to digital converter (ADC), a filtering-equalizing unit, a zero crossing detector, a data phase locked loop, a data mapping unit and an estimation unit is provided. The ADC converts a radio frequency signal to a plurality of sampling data points. The sampling data points are converted to a plurality of retiming data points and a clock signal by the filtering-equalizing unit, the zero crossing detector and the data phase locked loop. The data mapping unit selects a plurality of maximum data points and minimum data points from the returning data points, and determines whether to map the maximum data points and the minimum data points to other levels for partially reconstructing the retiming data points. The estimation unit recovers the reconstructed retiming data points to a modulation signal.

Abstract: A method for determining a type of an optical disk includes following steps. A laser beam of a first type is focused on a disk to generate a first optical reflection signal. A first spherical aberration estimate is generated according to the degree of dispersion and strength of the first optical reflection signal. A laser beam of a second type is focused on the disk to generate a second optical reflection signal. A second spherical aberration estimate is generated according to the degree of dispersion and strength of the second optical reflection signal. The type of the disk is determined based on the first spherical aberration estimate and the second spherical aberration estimate.

Abstract: A soft-in-soft-out (SISO) decoder for a general block code includes a source bit generator which generates k guessed source bits; a channel encoder which maps the k guessed source bits to an n-bit channel codeword; a QAM symbol mapper which generates a locally generated symbol sequence comprising m consecutive QAM symbols based on the n-bit channel codeword; a correlator which receives a symbol sequence, a channel state information sequence, and the locally generated symbol sequence to calculate a correlation associated with the received symbol sequence based on the received symbol sequence, the channel state information sequence, and the locally generated symbol sequence; and a log-likelihood ratio calculator which is connected to the source bit generator and the correlator to thereby calculate the required log-likelihood ratios associated with all coded bits corresponding to the received symbol sequence.

Abstract: A system for applying multi-direction and multi-slope region detection to image edge enhancement is provided to perform the image edge enhancement on an image. For pixel (i) indicating i-th pixel of line of the image, a line buffer temporarily stores the pixel (i) and its neighboring pixels. A region classification device classifies the pixel (i) into a region type. A left flat pixel detector depends on the region type to search the neighboring pixels of the pixel (i) for a left flat region pixel. A right flat pixel detector depends on the region type to search the neighboring pixels of the pixel (i) for a right flat region pixel. An edge enhancer performs an edge enhancement operation on the pixel (i) and neighboring pixels when the pixel (i) is an extended region and the left and the right flat region pixels are included in the neighboring pixels.