Michael Chen

US Patent:

7522365, Apr 21, 2009

Filed:

Apr 12, 2005

Appl. No.:

11/103900

Inventors:

Michael Chen - Westminster CO, US

Assignee:

Maxtor Corporation - Scotts Valley CA

International Classification:

G11B 5/09
G11B 27/36
G11B 5/03
G11B 5/58

US Classification:

360 53, 360 31, 360 66, 360 7701

Abstract:

A magnetic storage system includes a disk, a head, an actuator, a read channel, and a main controller. The main controller causes the head to read a data block of a selected track of the disk at each of a plurality of fixed offsets from a center of the selected track. The main controller samples a gain in the read channel a plurality of times while the head is reading the data block at each of the plurality of fixed offsets to obtain a plurality of gain samples for each of the plurality of fixed offsets. If the data block was written off-track with a non-constant offset, the main controller determines an approximate starting position and an approximate rate of change of an off-track deviation of the data block based on the plurality of gain samples for the plurality of fixed offsets.

US Patent:

7634706, Dec 15, 2009

Filed:

Jul 5, 2006

Appl. No.:

11/481078

Inventors:

Michael H. Chen - Westminster CO, US
Rajita Shrestha - Westminster CO, US
James C. Alexander - Boulder CO, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

H03M 13/43

US Classification:

714760

Abstract:

A system for enhancing the error correction capability of an error correction code (“ECC”) during error recovery operations accumulates, for respective bits, counts of the number of times the bits are detected as 1s in multiple re-reads of a data signal. The system then determines, based on the associated count, if a reconstructed bit should be considered a 1 or 0, or neither, that is, if the reconstructed bit should be considered erroneous, by comparing the count to a majority detection threshold and then to either an upper or a lower predetermined threshold that corresponds to the confidence with which the bit is reconstructed as a either a 1 or a 0. If the confidence is sufficiently low, that is, if the count falls below the upper threshold or above the lower threshold, the reconstructed bit is flagged as erroneous. After all of the bits are reconstructed, the system groups the bits into symbols to reproduce the ECC codeword, and sets erasure pointers that identify the locations of a predetermined number, s, of the symbols that are associated with the highest degree of uncertainty, that is, the largest numbers of flagged bits or, as appropriate, the largest numbers of flagged bits with the lowest confidence levels. The error correction operation then decodes the symbols in the identified locations as erasures.

US Patent:

8059353, Nov 15, 2011

Filed:

Aug 25, 2008

Appl. No.:

12/197508

Inventors:

Michael Chen - Westminster CO, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/09
G11B 27/36
G11B 5/03
G11B 5/58

US Classification:

360 53, 360 31, 360 66, 360 7701

Abstract:

A magnetic storage system includes a disk, a head, an actuator, a read channel, and a main controller. The main controller causes the head to read a data block of a selected track of the disk at each of a plurality of fixed offsets from a center of the selected track. The main controller samples a gain in the read channel a plurality of times while the head is reading the data block at each of the plurality of fixed offsets to obtain a plurality of gain samples for each of the plurality of fixed offsets. If the data block was written off-track with a non-constant offset, the main controller determines an approximate starting position and an approximate rate of change of an off-track deviation of the data block based on the plurality of gain samples for the plurality of fixed offsets.

US Patent:

8196001, Jun 5, 2012

Filed:

Nov 5, 2009

Appl. No.:

12/613058

Inventors:

Michael H. Chen - Westminster CO, US
Rajita Shrestha - Westminster CO, US
James C. Alexander - Boulder CO, US

Assignee:

Seagate Technology LLC - Cupertino CA

International Classification:

H03M 13/00

US Classification:

714752, 714760

Abstract:

Systems for identifying potentially erroneous and/or erased data are provided. Systems have a bit detector, an accumulator, and a data reconstruction processor. The bit detector assigns values to bits read in a data signal. The bit detector illustratively assigns multiple values to each of the bits. The accumulator accumulates a count of the multiple values assigned by the bit detector for each of the bits. The accumulator associates each bit with a particular value based at least in part on its accumulated count. The data reconstruction processor determines for each of the bits a confidence level of the particular value associated to it. The data reconstruction process sets flags for a portion of the bits. The flags identify the portion of the bits as possible erased or erroneous data. The flags are set based at least in part on the confidence levels of the portion of the bits.

US Patent:

20060230427, Oct 12, 2006

Filed:

Mar 30, 2005

Appl. No.:

11/093627

Inventors:

Gerard Kunkel - Yardley PA, US
Steve Silva - Bryn Mawr PA, US
Ty Ahmad-Taylor - New York NY, US
James Capps - Wheat Ridge CO, US
Mitchell Weinraub - Englewood CO, US
Gary Traver - Parker CO, US
Daniel Groustra - Littleton CO, US
Michael Chen - Wallingford PA, US
Griffin Moore - Morrison CO, US

International Classification:

H04N 7/173
H04N 7/16
H04N 7/18

US Classification:

725133000, 725080000, 725100000, 725141000

Abstract:

Method and system of providing a user interface. The method and system relating to the user of a media device to support displaying video and the user interface in a video rich fashion. The method and system may provide dynamic operations which provide increased functionality and interactivity, such as to provide a multi-functional user interface and navigation portal which provides aesthetically pleasing and functional mosaics of video, advertisements, textual and graphical displays, and other motion or non-motion based displays.

US Patent:

20070288963, Dec 13, 2007

Filed:

Jun 13, 2006

Appl. No.:

11/451769

Inventors:

Ty O. Ahmad-Taylor - New York NY, US
Michael Chen - Wallingford PA, US

Assignee:

Comcast Cable Holdings, LLC - Philadelphia PA

International Classification:

H04N 7/10
G06F 13/00
H04N 7/025
G06F 3/00
H04N 5/445

US Classification:

725 46, 725 34, 725 35

Abstract:

Method and system of recommending program without individually compiling subscribe profile information. The method and system being suitable for recommending television programs, movies, and any other media, including but not limited to advertisements and music.

US Patent:

20100124676, May 20, 2010

Filed:

Nov 20, 2008

Appl. No.:

12/274446

Inventors:

John E. Meschter - New York NY, US
James K. Prueitt - Ballston Lake NY, US
Paul Bishop - Gansevoort NY, US
Robert Miller - Delmar NY, US
Karen Thatcher - East Berne NY, US
Bryan Grygus - Clifton Park NY, US
Michael Chen - Cambridge MA, US
Zhigang Qi - Schenectady NY, US

International Classification:

B01D 19/00
H01M 8/04

US Classification:

429 12, 95260, 95254, 96220

Abstract:

A system and method for managing gas bubbles in a liquid flow system are described. In particular, according to the system and method, novel techniques reduce a volume of cavities in the liquid flow system and limit a cross-sectional area of the liquid flow system to a maximum cross-sectional area of tolerably sized bubbles. In this manner, by reducing the cavity volumes and limiting cross-sectional areas, the formation of intolerably sized bubbles and the aggregation of tolerably sized bubbles into intolerably sized bubbles are each substantially prevented. Also, bubbles may be removed from the system to reduce the quantity of bubbles that are to be managed.

US Patent:

20100124678, May 20, 2010

Filed:

Nov 20, 2008

Appl. No.:

12/274567

Inventors:

John Meschter - New York NY, US
Bryan Grygus - Troy NY, US
Nagaraja K. Yaddanapudi - Tarrytown NY, US
Keith Brown - Clifton Park NY, US
James Prueitt - Ballston Lake NY, US
Karen Thatcher - East Berne NY, US
Michael Chen - Cambridge MA, US
George Allen - Middle Grove NY, US
Wenpeng Liu - Niskayuna NY, US
Zhigang Qi - Schenectady NY, US
Garrick D.S. Smith - Madison WI, US

Assignee:

MTI MICROFUEL CELLS, INC. - Albany NY

International Classification:

H01M 8/04
H01M 8/00

US Classification:

429 13, 429 25, 429 24

Abstract:

Fuel feed systems capable of providing substantially consistent flow of fuel to a fuel cell and also capable of tolerating varying pressures from a reservoir (also referred to as fuel supply or fuel cell cartridge) and the fuel cell while maintaining substantially consistent control flow to the fuel cell are disclosed.