Abstract: An optimal correlation matching method for determining track behavior, which applies a video stream having a first image and a second image for locating a motion vector associated with a block of the first image in the second image, wherein each image has a plurality of blocks in rows and columns and each block has a plurality of pixels in rows and columns. The method divides a search window into a plurality of search subdivisions, selects one from the subdivisions as an operating search window, locates a center of a block respectively at all positions of the operating search window such that upon each position of the center located, pixels of the block of the first image in accordance with the operating search window are applied to corresponding pixels of the second image for performing match operation, thereby reducing required number for match operation.

Abstract: A move-sled-home device is used in an optical disc drive. The move-sled-home device includes a processing unit, a motor actuator, a sled, a sled motor, and a current-detecting unit. The processing unit outputs a control signal. The motor actuator generates a driving voltage according to the control signal. The sled motor generates a driving current according to the driving voltage to move the sled. The current-detecting unit is used for receiving and converting the driving current into an indicating signal, and issuing the indicating signal to the processing unit. During a move-sled-home action, the processing unit realizes a magnitude of the driving current according to the indicating signal, thereby determining whether the move-sled-home action is finished.

Abstract: A method for near maximum-likelihood sequential decoding is provided. According to the method, paths unlikely to become the maximum-likely path are deleted during decoding through a level threshold to reduce decoding complexity. Besides, the method performs maximum-likelihood decoding through sequential decoding by adopting a metric, so that a received signal does not have to go through a hard decision procedure.

Abstract: An erasure information marking method for a burst cutting area (BCA) of a blu-ray disc (BD) is provided. The erasure information marking method includes obtaining at least four raw data recorded in the BCA; recognizing a record type of the BCA according to the four raw data; obtaining two duplicate copyright protection data, relating to the copyright protection of the BD, in the four raw data according to the record type of the BCA; and marking the erasure information of the BCA according to the difference between the two duplicate copyright protection data.

Abstract: An instruction length determination device includes an instruction input unit having a memory space to store a plurality of N-bit data; an instruction fetch unit which fetches the plurality of N-bit data from the instruction input unit; an instruction length determination logic which compares concatenate bits of a first N-bit data with a predetermined value for determination of an instruction length; and an instruction concatenate unit which selectively concatenates a number of successive N-bit data based on the determination. The instruction length determination logic determines that the first N-bit data is a complete instruction when the concatenate bit of the first N-bit data is not equal to the predetermined value. Otherwise, the instruction length determination logic determines that a complete instruction is formed of last N-bit data finally fetched and all N-bit previously reserved.

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 temperature detecting device includes a current source, a plurality of resistors, a binary counter, a multiplexer, a comparator and a control logic. The current source provides a PTAT current. The resistors provide m voltage signals with ascending or descending voltages. The binary counter generates a binary select signal having (n+1) bits. The m voltage signals are selectively outputted from the multiplexer as a multiplexer output signal according to the binary select signal, wherein 2n<m<2n+1. The comparator is used for comparing the multiplexer output signal with a reference voltage, thereby generating a comparing signal. The control logic is for issuing the start signal. If the comparing signal has a level change, the control logic controls the binary counter to record the binary select signal as a binary temperature signal. The reference voltage does not vary with temperature.

Abstract: A method for sharing static link codes by software components in a dynamic link library (DLL) and a main program. First, the main program links to a static link library (SLL) and creates function pointers and variable pointers in the DLLs corresponding to the SLL. Next, the functions of a DLL program code associated with calling the SLL are changed into corresponding function pointers. Next, the variables of the DLL program code associated with calling the SLL are changed into corresponding variable pointers. Finally, the main program and the DLLs are compiled into the respective program codes, wherein the functions and variables associated with a DLL are obtained via the pointers. When the DLL is loaded in the main program, the memory addresses of the functions and variables for calling and corresponding to the SLL are passed to the DLL to share the static link codes with the main program.

Abstract: An automatic gain control system with hysteresis switching includes an error calculator for calculating the difference between a first estimation signal and a take over point (TOP) value to produce an error signal. A hysteresis comparator compares the first estimation signal and the TOP value to produce a control signal. A first gain control loop generates a first gain control signal based on the control signal to control a gain of a first variable gain amplifier. A second gain control loop generates a second gain control signal based on the control signal to control a gain of a second variable gain amplifier. As the first estimation signal leaves a hysteresis region of the hysteresis comparator, the first gain control signal is monotonically decreasing and the first gain control signal is monotonically increasing. As a result, the total gain is stable.

Abstract: An apparatus for data strobe and timing variation detection of an SDRAM interface includes a differential-signal to single-end signal converter, a first phase delay circuit, a data latch circuit. The differential-signal to single-end signal converter receives a differential data strobe signal from the SDRAM interface and converts the signal into a single-end data strobe signal. The first phase delay circuit is connected to the differential-signal to single-end signal converter to delay the phase of the single-end data strobe signal for producing a delayed data strobe signal. The data latch circuit is connected to the phase delay circuit to latch synchronous data from the SDRAM interface according to the delayed single-end data strobe signal.

Abstract: A method for identifying a type of an optical disk includes the steps of: turning on a laser diode of an optical pickup and focusing light emitted from the laser diode on the optical disk; moving the optical pickup to obtain a plurality of servo signals; reading a specific servo signal from the servo signals; and determining the type of the optical disk according to the count of enabled times of the specific servo signal and a corresponding enabled time period.

Abstract: A system for reducing memory access bandwidth in video decoding includes a video decoder, a storage device and a compressor. The video decoder receives a compressed video bitstream and decodes the bitstream to generate decoded I, P and B frames. The storage device has first and second storage areas and is connected to the video decoder. The compressor is connected to the video decoder and the storage device and performs a compression operation on the decoded I, P and B frames to generate compressed decoded I, P and B frames respectively. The decoded I frames and the decoded P frames are stored in the first storage area, and the compressed decoded I frames, the compressed decoded P frames and the compressed decoded B frames are stored in the second storage area.

Abstract: A method of real-time recording a file with an AVI format on an optical storage medium is provided, in which the optical storage medium is a write-once type medium and employs a file system without multi-section record. According to the method, in the AVI format, a dummy chunk is used to cover a linking loss area generated between every continuous recording area, thus avoiding the AVI format being destroyed by the linking loss area.

Abstract: A signal to noise power ratio estimation system for multi-carrier communication includes a phase rotator, a power estimator, a channel gain calculator, an average and selection device, a combination and calculation device and a decibel (dB) transformation device. The signal to noise power ratio estimation system makes use of a transmit parameter signaling or pilot subcarriers to blindly assist in the signal to noise power ratio estimation to accordingly gain an estimated signal to noise power ratio accurately, and thus a communication system can be calibrated to a preferred condition.

Abstract: A method for automatically calibrating an output power of an optical pick-up head is provided. First, an optical disc is provided, wherein a relationship between the output power for writing the optical disc and a specific parameter corresponding thereto is defined as a first function. Next, the optical pick-up head is controlled to perform a writing operation on the optical disc according to an instruction value, and obtain the specific parameter corresponding to the instruction value. Next, the output power corresponding to the instruction value is obtained according to the first function and the specific parameter. Next, the instruction value is adjusted according to the instruction value and the output power, and the output power of the optical pick-up head is calibrated according to the adjusted instruction value.

Abstract: A transmitter circuit, a receiver circuit and an interface switching module for SATA or SAS interface are provided. The invention uses transistors as elements with different impedance and also provides impedance modulating method in coordination with the exterior circuit and the layout design so as to develop an auto-switching mechanism between SATA and SAS interfaces, thereby integrating two transmission interfaces in a single system.

Abstract: A coding method and system with an adaptive bitplane coding mode is provided to code multiple bitplanes of a frame consisting of multiple macroblocks. Each bitplane consists of macroblock modes used by the macroblocks of the frame. The method includes the steps of: (A) initializing a bitplane coding mode of the frame as a compress mode; (B) coding the frame and the bitplanes to thereby obtain coded bitplanes, and calculating the bit number of coded bitplanes; (C) calculating the bit number of uncoded bitplanes; (D) executing step (A) when the bit number of coded bitplanes is smaller than the bit number of uncoded bitplanes; (E) initializing the bitplane coding mode of the frame as a raw mode when the bit number of coded bitplanes is not smaller than the bit number of uncoded bitplanes.

Abstract: A protective system and method for data write of an optical disk drive, which produces a pseudo synchronization signal for the optical disk drive to perform a write operation on an optical disk. First, a write target sector is determined and a current sector of the optical disk is monitored. Next, it is determined whether a wobble synchronization signal is possibly extracted from the optical disk; if not, the pseudo synchronization signal is produced. Finally, the optical drive is driven to perform the write operation on the optical disk.

Abstract: A de-interlacing system includes a motion adaptive de-interlacer, a horizontal motion estimation device, a horizontal motion compensation device, a vertical motion detection device, a multiplexer, and a film signal detector. The film signal detector receives an input signal and decides whether the input signal is a video stream or a film stream to thereby select an output from the motion adaptive de-interlacer or the horizontal motion estimation and compensation device. Thus, a de-interlacing output has stable and smooth edges when a video stream is inputted, and the motion judder phenomenon is reduced when a film stream is inputted.

Abstract: A temporal vector processing device includes a motion vector estimation device for performing a motion estimation on a first pixel to generate a first motion vector. A motion vector compensation device performs a motion vector compensation on the first pixel based on the first motion vector to obtain a second pixel. A buffer temporarily stores motion vectors of the pixels of the image. A motion vector determination device determines whether a second motion vector is stored in the buffer at a corresponding storage location of the second pixel. In determining that the second motion vector is stored in the buffer at the corresponding storage location of the second pixel, the corresponding storage location of the second pixel in the buffer is updated based on a determination mechanism, and otherwise the first motion vector is directly stored in the buffer at the corresponding storage location of the second pixel.