1
yuan xing Lee
Zongwang Li, Shaohua Yang, Yang Han, Hao Zhong, Yuan Xing Lee, Weijun Tan: Turbo-equalization methods for iterative decoders. LSI Corporation, Mendelsohn Drucker & Associates P C, Craig M Brown, Steve Mendelsohn, October 16, 2012: US08291299 (23 worldwide citation)

Certain embodiments of the present invention are improved turbo-equalization methods for decoding encoded codewords. In one embodiment, in global decoding iteration i, the magnitude values of all decoder-input LLR values (Lch) are adjusted based on the number b of unsatisfied check nodes in the deco ...


2
yuan xing Lee
George Mathew, Yang Han, Shaohua Yang, Zongwang Li, Yuan Xing Lee: Frequency-based approach for detection and classification of hard-disc defect regions. LSI Corporation, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, October 4, 2011: US08031420 (10 worldwide citation)

In a hard-disc drive read channel, frequency-based measures are generated at two different data frequencies (e.g., 2T and DC) by applying a transform, such as a discrete Fourier transform (DFT), to signal values, such as ADC or equalizer output values, corresponding to, e.g., a 2T data pattern store ...


3
yuan xing Lee
Yang Han, Kiran Gunnam, Shaohua Yang, Hao Zhong, Nils Graef, Yuan Xing Lee: Selectively strengthening and weakening check-node messages in error-correction decoders. LSI Corporation, Mendelsohn Drucker & Associates P C, Craig M Brown, Steve Mendelsohn, August 14, 2012: US08245098 (5 worldwide citation)

In one embodiment, an LDPC decoder has a plurality of check-node units (CNUs) and a controller. Initially, the CNUs generate check-node messages based on an initial offset value selected by the controller. If the decoder converges on a trapping set, then the controller selects new offset values for ...


4
yuan xing Lee
George Mathew, Hongwei Song, Yuan Xing Lee: Dibit extraction for estimation of channel parameters. LSI Corporation, Mendelsohn Drucker & Associates P C, Kevin M Drucker, Steve Mendelsohn, April 3, 2012: US08149529 (5 worldwide citation)

In one embodiment, a storage-device-implemented method for estimating one or more channel parameters of a storage device including a read channel and a storage medium with a bit sequence stored on the storage medium. The method includes: (a) the storage device reading at least a portion of the bit s ...


5
yuan xing Lee
George Mathew, Jeffrey Grundvig, Hongwei Song, Yuan Xing Lee: Fly-height control using asynchronous sampling. LSI Corporation, Mendelsohn Drucker & Associates P C, Craig M Brown, Steve Mendelsohn, December 13, 2011: US08077427 (4 worldwide citation)

In one embodiment, a hard-disk drive system performs fly-height control using a read-back mode and a loop-back mode. The read-back mode measures first and second harmonics pre-recorded on the medium and divides the first measurement by the second to obtain a read-back mode harmonic ratio. The loop-b ...


6
yuan xing Lee
Shaohua Yang, George Mathew, Yang Han, Zongwang Li, Yuan Xing Lee: Amplitude-based approach for detection and classification of hard-disc defect regions. LSI Corporation, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, October 25, 2011: US08045283 (3 worldwide citation)

In a hard-disc drive, a defect region on the hard disc is classified as corresponding to either thermal asperity (TA) or media defect (MD) by generating two statistical measures. A first measure (e.g., α1) is based on (i) the magnitudes of one or both of signal values (e.g., equalizer input or outpu ...


7
Ketan Sampat, John Kembel: User interface, method, and apparatus selecting and playing channels having video, audio, and/or text streams. Intel Corporation, Steve Mendelsohn, William H Murray, September 17, 1996: US05557724 (403 worldwide citation)

A user interface is displayed on a computer system capable of processing one or more data streams. The user interface has one or more displayed representations, where each of the displayed representations corresponds to one of the data streams. A user of the computer system selectively adjusts the p ...


8
Raymond K Lorson, Robin J Sainsbury, Neil S Kenig: Card-recognition and gaming-control device. Advanced Casino Technologies, Steve Mendelsohn, October 3, 2000: US06126166 (283 worldwide citation)

An integrated blackjack game control system having multiple sensors and output devices, electronic signal processing equipment, passive and active operator control devices, and a computer system. The system components are capable of being installed on or near existing blackjack tables and support eq ...


9
Rhoda Yaker: Specifiable delete times for voice messaging. Lucent Technologies, Steve Mendelsohn, October 24, 2000: US06137864 (198 worldwide citation)

A voice messaging system enables a callee to specify a retention time for retaining a stored voice message from a caller. The system then automatically deletes the stored voice message after the expiration of the retention time. In one embodiment, the caller is able to specify one retention time whe ...


10
Mojtaba Mirashrafi, Benjamin Vrvilo, Peter Tung, Krishnan Rajamani: Preemptive priority-based transmission of signals using virtual channels. Intel Corporation, Steve Mendelsohn, William H Murray, November 12, 1996: US05574934 (183 worldwide citation)

A computer system for transmitting two or more types of signals. Each type of signal is assigned a priority level. Signals of a particular type are transmitted as they become ready for transmission, unless signals of a different type having a greater priority become ready for transmission. In that c ...