Browsing by Author "Huang"

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Architecture and method for fine granularity scalable video coding
(2007-04-10)
Huang
;
Hsiang-Chun
;
Wang
;
Chung-Neng
;
Chiang
A robust fine granularity scalability video encoding includes a base layer encoder and an enhancement layer encoder in which motion compensated difference images are generated by comparing an original image to predicted images at base layer and enhancement layer with motion compensation. Based on leaky and partial predictions, a high quality reference image is constructed at the enhancement layer to improve temporal prediction. In the construction of the high quality reference image, one parameter β controls the number of bitplanes of the enhancement layer difference coefficients used and another parameter α controls the amount of predictive leak. A spatial scalability module allows the processed pictures at the base layer and the enhancement layer to have identical or different spatial resolutions.
Architecture and method for fine granularity scalable video coding
(2006-07-04)
Huang
;
Hsiang-Chun
;
Wang
;
Chung-Neng
;
Chiang
A robust fine granularity scalability video encoding includes a base layer encoder and an enhancement layer encoder in which motion compensated difference images are generated by comparing an original image to predicted images at base layer and enhancement layer with motion compensation. Based on leaky and partial predictions, a high quality reference image is constructed at the enhancement layer to improve temporal prediction. In the construction of the high quality reference image, one parameter β controls the number of bitplanes of the enhancement layer difference coefficients used and another parameter α controls the amount of predictive leak. A spatial scalability module allows the processed pictures at the base layer and the enhancement layer to have identical or different spatial resolutions.
Background comparator offset calibration technique for flash analog-to-digital converters
(2006-06-20)
Huang
;
Chun-Cheng
;
Wu
;
Jieh-Tsorng
A background-calibrated comparator and a background-calibrated flash analog-to-digital converter are disclosed for using in mixed-signal integrated circuit design in particular on the high-speed analog-to-digital converter circuit. Without affecting the operation of the comparator, the disclosure is directed at reducing the unpredictable input offset voltage originated from the variation of process parameters and environmental factors. The background-calibrated comparator includes a random chopping comparator, a calibration processor, and a random sequence generator. The background-calibrated flash analog-to-digital converter (ADC) includes a background-calibrated comparator array together with a reference voltage generator, a thermometer code edge detector, and a set of digital encoders.
Bit error rate tester and pseudo random bit sequences generator thereof
(2009-02-03)
Chen
;
Wei-Zen
;
Huang
;
Guan-Sheng
A bit error rate tester and a pseudo random bit sequences (PRBS) generator thereof are provided. The bit error rate tester includes a transmitter PRBS generator, a master PRBS generator, a slave PRBS generator, a comparator, and a counting unit. The transmitter PRBS generator generates a parallel N-bit (N is an integer larger than 1) original PRBS, wherein an object to be tested receives the original PRBS and outputs a parallel N-bit code to be tested. The master and the slave PRBS generators generate a master and a slave parallel N-bit PRBS, respectively. The comparator receives, compares, and determines whether the code to be tested, the master and the slave PRBS are the same or not, and outputs a comparison result. The counting unit coupling to the comparator counts a number of bit errors based on the comparison result.
Blue-light generating femtosecond wavelength-tunable non-collinear optical parametric amplifier
(2006-09-12)
Pan
;
Ci-Ling
;
Huang
;
Jung Y.
;
Zhang
The present invention discloses a means of the generation of tunable femtosecond pulses from 380 nm to 465 nm near the degenerate point of a 405-nm pumped type-I BBO non-collinearly phase-matched optical parametric amplifier (NOPA). The tunable UV/blue radiation is obtained from sum frequency generation (SFG) between the OPA output and the residual fundamental beam at 810-nm and cascaded second harmonic generation (SHG) of OPA. With a pumping energy of 75 mJ at 405 nm, the optical conversion efficiency from the pump to the tunable SFG is more than 5% and the efficiency of SHG of the OPA is about 2%.
Butterfly match-line structure and search method implemented thereby
(2011-03-08)
Huang
;
Po-Tsang
;
Hwang
;
Wei
;
Chang
The present invention discloses a butterfly match-line structure and a search method implemented thereby, wherein the parallelism of the match lines is increased to shorten the search time, and a butterfly-type connection is used to reduce the power consumption and achieve the best energy efficiency. Via the butterfly-type connection, information can be reciprocally transmitted between the parallel match lines, which are independent originally. When a miss case occurs, more succeeding memory cells will not be compared but will be turned off. Thereby, the power consumption is reduced. Further, XOR-based conditional keepers are used to reduce the matching time and the power consumption. Besides, such a circuit is also used to shorten the delay time of the butterfly-type connection.
Capacity-based compressed mode control method for inter-system handover in universal mobile telecommunication system
(2010-09-14)
Huang
;
Ching Yao
;
Chang
;
Cheng Ta
;
Ho
The Inter-System handover is one of the key features in the third generation cellular systems. The compressed mode, with variable transmission gaps and power levels, is standardized to support the inter-frequency system handover. To minimize the use of system resources while maintaining the border-cell handover quality, a capacity-based compressed mode control method of the present invention is proposed. Considering the tradeoff between the capacity and the communication quality, the control method can adaptively manage the compressed mode operation based on the potential impacts on the capacity and the effectiveness of the compressed mode measurement. The present invention will improve the effectiveness and performance of the compressed mode operation.
Dynamical sequentially-controlled low-power multiplexer device
(2011-02-01)
Huang
;
Juinn-Dar
;
Chen
;
Chia-I
Multiplexers are basic components widely used in VLSI designs. Switching activities of a multiplexer are one of the most important factors of power consumption. A multiplexer may have some sub-multiplexers. An extra dynamic controller is applied in the present invention to reconfigure control signals for decreasing switching activities of the composed sub-multiplexers. Thus, the power consumption of the multiplexer is reduced to achieve higher power efficiency.
Etching method for nitride semiconductor
(2011-02-15)
Lee
;
Wei-I
;
Huang
;
Hsin-Hsiung
;
Zeng
The invention discloses etching method for the nitride semiconductor. Firstly dielectric layer is formed on gallium nitride. The line pattern or dot pattern is formed on the dielectric layer by using the exposure, development, and etching processes. The dielectric layer is used as the mask for the epitaxial lateral overgrowth of follow-up gallium nitride layer. The thick gallium nitride film is grown on the dielectric layer. Then the wet etching process is used to remove the dielectric layer, and the thick gallium nitride film on the dielectric layer is etched to form the specific shape as required.
Fiber Bragg grating sensored segmented deflectometer for ground displacement monitoring
(2008-06-17)
Huang
;
An-Bin
;
Ho
;
Yen-Te
The invention provides a monitoring device mainly for sensing ground displacement, including the fiber Bragg grating sensored deflectometer and the signal interrogator/computer system. The device uses a segmented design that consists of a flexible tube (referred to as the flexible segment) and two rigid segments and thus referred to as the double hinged FBG segmented deflectometer (DH-FBG-SD). For field installation, multiple DH-FBG-SD units are connected together to form a string as it is inserted into a grouted-in-place inclinometer casing. The distortion of the inclinometer casing induced by ground movement causes relative rotation of the inserted DH-FBG-SD. All of the DH-FBG-SD units are connected to an FBG interrogator/computer system situated on ground surface. The FBG signals are recorded and analyzed by the interrogator/computer system.
Fine-grained bandwidth control arbiter and the method thereof
(2009-08-18)
Huang
;
Juinn-Dar
;
Lin
;
Bu-Ching
;
Lee
A fine-grained bandwidth control arbiter manages the shared bus usage of the requests of the masters which have real-time and/or bandwidth requirements, moreover, the masters are preset a ticket respectively. The arbiter consists of three components, a real-time handler, a bandwidth regulator, and a lottery manager with tuned weight. The real-time handler grants the most urgent request. The bandwidth regulator handles the bandwidth allocation and blocks the requests of masters that have met the bandwidth requirement. The lottery manager with tuned weight stochastically grants one of the contending masters according to the ticket assignment.
High-resolution intelligent rotor machine diagnostic system and method
(2006-07-18)
Bai
;
Ming-Sian
;
Hung
;
Ming-Hung
;
Huang
The present invention relates to a smart system and method of performing high-resolution frequency order analysis/diagnosis on rotor, in which such system is characterized in that capable of performing order analysis via a Kalman filter or a RLS (Recursive Least Square) algorithm while determining the failure status based on the Fuzzy theory. The smart system of present invention comprises a data acquisition means, a bench data setup means, a STFT time-spectra analysis/re-sampled order tracking means, a Kalman filter or RLS algorithmic means, a fuzzy diagnosis means and a window interface (e.g., GUI) while repeatedly making use the functions of those means so as to achieve the real-time diagnosis on rotor.
Iris recognition method utilizing matching pursuit algorithm
(2011-04-05)
Che
;
Wen-Gang
;
Lin
;
Jian-Liang
;
Hwang
The present invention disclose an iris recognition method, which utilizes a matching pursuit algorithm to simplify the extraction and reconstruction of iris features and reduce the memory space required by each iris feature vector without the penalty of recognition accuracy. The iris recognition method of the present invention comprises an iris-localization component and a pattern matching component. The iris-localization component locates the iris region via the color difference between different portions of the eyeball. The primary iris features are extracted from iris information and transformed into a sequence of iris feature vectors by a matching pursuit algorithm. Thus, the iris image can be represented by a sequence of atoms, and each atom contains base, amplitude and location. Then, the comparison between the feature vectors of two irises is performed to determine whether the two irises match.
Leakage current cut-off device for ternary content addressable memory
(2010-06-15)
Huang
;
Po-Tsang
;
Liu
;
Wen-Yen
;
Hwang
A leakage current cut-off device for a ternary content addressable memory is provided. The storage cell of a ternary content addressable memory may be in the active mode, data-retention mode and cut-off mode. This invention applies a multi-mode data retention power gating device to the storage cell of the ternary content addressable memory to reduce the leakage current through the storage cell in the data-retention mode and the cut-off mode, and support the full speed operation in the active mode.
Light-emitting device and method for making the same
(2011-02-15)
Chiu
;
Ching-Hua
;
Huang
;
Hung-Wen
;
Kuo
A light-emitting device is capable of emitting a light having a wavelength ranging from 300 to 550 nm, and includes: a substrate; a p-type semiconductor layer disposed on the substrate; an active layer disposed on the p-type semiconductor layer; a n-type semiconductor layer disposed on the active layer and having a waveguide-disposing surface; and a waveguide structure formed on the waveguide-disposing surface of the n-type semiconductor layer and having a plurality of spaced apart nanorods extending from the waveguide-disposing surface.
Method for promoting light emission efficiency of LED using nanorods structure
(2009-09-15)
Huang
;
Hung-Wen
;
Lu
;
Tien-Chang
;
Chiu
Method for the light emitting diode (LED) having the nanorods-like structure is provided. The LED employs the nanorods are subsequently formed in a longitudinal direction by the etching method and the PEC method. In addition, the plurality of the nanorods is arranged in an array so that provide the LED having much greater brightness and higher light emission efficiency than the conventional LED.
Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications
(2007-07-10)
Huang
;
Ching Yao
;
Tsai
;
Ming Yuan
;
Huang
A multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications is proposed to let a mobile node adjust the handoff slope according to different communication connection situations for setting the optimum add/drop connection trigger thresholds. The algorithm comprises the following steps. First, a mobile node receives pilot strengths of its service pilot and nearby pilots to produce an aggregate strength. Next, the mobile node determines whether to perform handoff according to the magnitude of the aggregate strength. The handoff action is then controlled by multi-slope handoff operations to set an appropriate slope and to calculate the add/drop connection trigger thresholds when performing handoff. Finally, the pilot to be connected is selected based on the communication quality at that time. In this way, the quality of the communication service can be enhanced, the connection power consumption can be lowered, and the communication channel usage can be reduced.
Scheduling method for supporting quality of service (QoS) in wireless local area network (WLAN)
(2009-04-07)
Huang
;
Ching Yao
;
Fan
;
Yu Long
A method for polling of stations in a Wireless Local Area Network (WLAN), including the steps of: obtaining Quality of Service (QoS) information related to the stations; assigning two timers to each WLAN service requiring QoS guarantee, one for uplink transmission and the other for downlink transmission; starting a Controlled Access Period (CAP) when a minimum timer Tm is below the threshold Tthr; polling the station with the minimum timer; updating the minimum timer after a polling message is sent; quitting CAP and permitting the resource contention if the minimum timer Tm is larger than the threshold Tthr.
Stored don't-care based hierarchical search-line scheme
(2009-04-28)
Chang
;
Shu-Wei
;
Hwang
;
Wei
;
Chang
In the proposed stored don't-care hierarchical search-line scheme, a content-addressable memory (CAM) is divided into several blocks. Each block contains a plurality of local search-lines, a global search-line, a buffer and a memory memory cell. Data are stored in the blocks in order according to the length of the prefix. Data with the longest prefix is stored at the bottommost, and its don't-care state is used as the control signal of the buffer to control whether to transfer the data on the global search-line to the local search-line or not. The local search-line then transfer the value into the memory cell. There is no complex control circuit and extra storage device needed. Moreover, because the control signal directly comes from the don't-care state, power consumption on search-lines can be effectively reduced with no increase of search delay.
Structure of metal oxide semiconductor field effect transistor
(2004-12-28)
Tsui
;
Bing-Yue
;
Huang
;
Chih-Feng
The present invention provides a structure of Metal Oxide Semiconductor Field Effect Transistor (MOSFET), which comprises a SOI (Silicon-On-Insulator) device, a MOS (Metal Oxide Semiconductor) formed on said SOI device, and a metal-silicide layer. Said SOI device includes a substrate, an insulation layer formed on said substrate, and a silicon layer formed on said insulation layer, and the MOS is formed on said SOI device. The metal-silicide layer is formed in accordance with a metal aligned process by a metal layer being deposited on said SOI device and on said MOS for reacting with said silicon layer, and an implant-to-silicide process is employed to form a high-density source region and a high-density drain region for modifying Schottky Barrier and diminishing Carrier Injection Resistance.