Mark K Watson

US Patent:

7676735, Mar 9, 2010

Filed:

Jun 9, 2006

Appl. No.:

11/423391

Inventors:

Michael G. Luby - Berkeley CA, US
Mark Watson - San Francisco CA, US
M. Amin Shokrollahi - San Jose CA, US

Assignee:

Digital Fountain Inc. - San Diego CA

International Classification:

H03M 13/00

US Classification:

714781, 714755

Abstract:

In a data decoder for decoding data from received symbols received over a channel from an encoder, a method for decoding data wherein the received data includes erasures and includes source symbols and repair symbols organized into one or more source blocks. The decoder uses a generator matrix, any square submatrix of which is invertible, such that the decoder performs decoding operations concurrently with the arrival of the source symbols and repair symbols that are a part of a source block. Novel methods for interleaving and specifying encoding structure for a large class of FEC codes, scheduling the sending of packets and the like, are also applied in conjunction with the method for decoding data.

US Patent:

7879759, Feb 1, 2011

Filed:

Feb 16, 2009

Appl. No.:

12/371760

Inventors:

Steve M. Augustine - Ellicott City MD, US
Guoyi Fu - Ellicott City MD, US
Mark Watson - Kensington MD, US

International Classification:

B01J 23/00
B01J 23/10
B01J 23/70
B01J 23/74
B01J 8/02
B01J 8/00
B01D 53/56
B01D 53/94
B01D 53/86
C01B 21/00
C01B 23/00
C01B 25/00
C01B 31/00
C01B 33/00
C01B 35/00
C01G 28/00
C01G 30/00
C01G 25/02
C01G 23/00
C02F 1/70

US Classification:

502350, 502349, 502304, 502324, 502338, 4232132, 4232391, 423598, 42359412, 210757

Abstract:

DeNOx catalysts for the reduction of NOx compounds and porous catalyst support materials are provided. The inventive catalysts comprise an active metal catalyst component and mixed TiO/ZrOporous support particles that comprise a) a crystalline phase comprising titanium dioxide and/or a titanium/zirconium mixed oxide, b) an amorphous phase comprising zirconium, and c) a small amount of one or more metal oxide(s) or metalloid oxide(s) deposited on the amorphous outer layer. The inventive catalysts exhibit superior activity and ammonia selectivity.

US Patent:

7971129, Jun 28, 2011

Filed:

May 10, 2007

Appl. No.:

11/747191

Inventors:

Mark Watson - San Francisco CA, US
Michael G. Luby - Berkeley CA, US

Assignee:

Digital Fountain, Inc. - San Diego CA

International Classification:

H03M 13/00

US Classification:

714784, 365200, 714752, 714758

Abstract:

A method of encoding data for transmissions from a source to a destination over a communications channel is provided. The method operates on an ordered set of source symbols and may generate zero or more redundant symbols from the source symbols, wherein data is encoded in a first step according to a simple FEC code and in a second step, data is encoded according to a second FEC code, more complex than the first FEC code. The first FEC code and/or the second FEC code might comprise coding known in the art. These steps result in two groups of encoded data in such a way that a low-complexity receiver may make use of one of the groups of encoded data while higher complexity receivers may make use of both groups of encoded data.

US Patent:

8006160, Aug 23, 2011

Filed:

Jun 29, 2007

Appl. No.:

11/771750

Inventors:

Steve Chen - Fremont CA, US
Mark Watson - San Francisco CA, US
Michael G. Luby - Berkeley CA, US
Bill Seed - Los Altos CA, US
Thomas Kunz - Fremont CA, US

Assignee:

Digital Fountain, Inc. - San Diego CA

International Classification:

H03M 13/00

US Classification:

714752

Abstract:

A sequence of symbol operations (a “schedule representation”) within a data storage device, wherein the operations are those used to process encoding or decoding operations of a forward error correction code (an “FEC code”) upon an arbitrary block of data of a given size (where size can be measured in numbers of symbols). The method is such that the schedule representation can be used to direct the processing of these operations upon a block of data in a way that is computationally efficient. Preferably, the same method can be applied to represent schedules derived from multiple different algorithms for the encoding or decoding of a code or for multiple different codes.

US Patent:

8065582, Nov 22, 2011

Filed:

Feb 13, 2007

Appl. No.:

11/674628

Inventors:

Mark Watson - San Francisco CA, US
Michael G. Luby - Berkeley CA, US

Assignee:

Digital Fountain, Inc. - San Diego CA

International Classification:

H03M 13/05

US Classification:

714752, 714776

Abstract:

Transmitters and receivers deal with streams of data, wherein the receiver is expected to begin using received data before receiving all of the data. Concurrent streams are sent and FEC coding is used with the streams and done as an aggregate. The transmitter performs FEC operations over the plurality of streams, wherein source blocks from at least two streams logically associated into a jumbo source block and FEC processing is performed to generate one or more jumbo repair block from the jumbo source block. Each of the source blocks comprises one or more source symbols from their respective stream. The jumbo source symbols can be of constant size and are suitably aligned along size boundaries that make processing efficient. Each source symbol need not be the same size, and the number of source symbols from each stream in a jumbo source block need not be the same value across streams.

US Patent:

8450236, May 28, 2013

Filed:

Apr 13, 2010

Appl. No.:

12/759320

Inventors:

Guoyi Fu - Ellicott City MD, US
Mark B. Watson - Kensington MD, US
Charles B. Muehlberger - Baltimore MD, US

Assignee:

Cristal USA Inc. - Hunt Valley MD

International Classification:

B01J 23/00
B01J 21/00
B01J 20/00

US Classification:

502339, 502243, 502262, 502327, 502332, 502333, 502334, 502344, 502347, 502350, 502355, 502415, 502439, 977773, 977775

Abstract:

A process for making a catalyst having precious metal nanoparticles deposited on a support includes first providing an aqueous dispersion of support particles. A pre-treatment slurry is prepared by mixing the aqueous dispersion of support particles with a water-soluble precious metal precursor and a reducing agent. The pre-treatment slurry is hydrothermally treated at a temperature in the range of from about 40 C. to about 220 C. for a time sufficient to deposit precious metal nanoparticles on the surface of the support particles, the precious metal nanoparticles having an average particle size less about 50 nm.

US Patent:

8533555, Sep 10, 2013

Filed:

Aug 9, 2011

Appl. No.:

13/205849

Inventors:

Steve Chen - Fremont CA, US
Mark Watson - San Francisco CA, US
Michael G. Luby - Berkeley CA, US
Bill Seed - Los Altos CA, US
Thomas Kunz - Fremont CA, US

Assignee:

Digital Fountain, Inc. - San Diego CA

International Classification:

H03M 13/00

US Classification:

714752

Abstract:

A sequence of symbol operations (a “schedule representation”) within a data storage device, wherein the operations are those used to process encoding or decoding operations of a forward error correction code (an “FEC code”) upon an arbitrary block of data of a given size (where size can be measured in numbers of symbols). The method is such that the schedule representation can be used to direct the processing of these operations upon a block of data in a way that is computationally efficient. Preferably, the same method can be applied to represent schedules derived from multiple different algorithms for the encoding or decoding of a code or for multiple different codes.

US Patent:

8555146, Oct 8, 2013

Filed:

Oct 19, 2011

Appl. No.:

13/276532

Inventors:

Mark Watson - San Francisco CA, US
Michael G. Luby - Berkeley CA, US

Assignee:

Digital Fountain, Inc. - San Diego CA

International Classification:

H03M 13/05

US Classification:

714774, 714776

Abstract:

Transmitters and receivers deal with streams of data, wherein the receiver is expected to begin using received data before receiving all of the data. Concurrent streams are sent and FEC coding is used with the streams and done as an aggregate. The transmitter performs FEC operations over the plurality of streams, wherein source blocks from at least two streams logically associated into a jumbo source block and FEC processing is performed to generate one or more jumbo repair block from the jumbo source block. Each of the source blocks comprises one or more source symbols from their respective stream. The jumbo source symbols can be of constant size and are suitably aligned along size boundaries that make processing efficient. Each source symbol need not be the same size, and the number of source symbols from each stream in a jumbo source block need not be the same value across streams.