Jian Lu

US Patent:

6389177, May 14, 2002

Filed:

Jul 2, 1996

Appl. No.:

08/677344

Inventors:

Ke-Chiang Chu - Saratoga CA
Jian Lu - Santa Clara CA
Yu Tina Tian - Stanford CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06K 940

US Classification:

382268, 382275, 382168

Abstract:

A system and method using edge processing to remove blocking artifacts comprises an edge processor having an image converter for building an edge representation of a received image, a statistics analyzer for compiling a histogram containing edge intensities of the edge representation, a reference calculator for using the histogram to compute reference values corresponding to the blocking artifacts and an artifact remover for identifying and removing the blocking artifacts using the computed reference values.

US Patent:

6618509, Sep 9, 2003

Filed:

Apr 9, 2001

Appl. No.:

09/829519

Inventors:

Yu Tina Tian - Stanford CA
Jian Lu - Santa Clara CA
Ke-Chiang Chu - Saratoga CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06K 900

US Classification:

382239, 382172, 35842614, 3484091

Abstract:

In a digital signal processing system, a method for selecting a transform function to apply to an input signal based on characteristics of the signal, and for self-adjusting criteria which are used in selecting a transform function to apply to a subsequent signal. Characteristics are obtained from the signal. The characteristics are compared to adjustable criteria which are used in selecting a transform function. Differing criteria are maintained for the different selectable transform functions. A record is maintained of transform functions selected and the particular characteristics that caused the selection. Based on the ability of a transform function to minimally define the coded signal, an inverse transform function is selected to decode the signal. The criteria used in selecting a transform function to apply to a subsequent signal are adjusted based on a quality measure of the decoded signal and the record of selected transform functions.

US Patent:

6798918, Sep 28, 2004

Filed:

Apr 17, 2002

Appl. No.:

10/124932

Inventors:

Ke-Chiang Chu - Saratoga CA
Jian Lu - Santa Clara CA
Yu Tina Tian - Stanford CA

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06K 940

US Classification:

382268, 382275, 382168

Abstract:

A system and method using edge processing to remove blocking artifacts comprises an edge processor having an image converter for building an edge representation of a received image, a statistics analyzer for compiling a histogram containing edge intensities of the edge representation, a reference calculator for using the histogram to compute reference values corresponding to the blocking artifacts and an artifact remover for identifying and removing the blocking artifacts using the computed reference values.

US Patent:

7079695, Jul 18, 2006

Filed:

Aug 7, 2003

Appl. No.:

10/637245

Inventors:

Yu Tina Tian - Stanford CA, US
Jian Lu - Santa Clara CA, US
Ke-Chiang Chu - Saratoga CA, US

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06K 9/36
G06K 9/46

US Classification:

382239, 382173, 35842614, 3484091, 37524002

Abstract:

In a digital signal processing system, a method for selecting a transform function to apply to an input signal based on characteristics of the signal, and for self-adjusting criteria which are used in selecting a transform function to apply to a subsequent signal. Characteristics are obtained from the signal. The characteristics are compared to adjustable criteria which are used in selecting a transform function. Differing criteria are maintained for the different selectable transform functions. A record is maintained of transform functions selected and the particular characteristics that caused the selection. Based on the ability of a transform function to minimally define the coded signal, an inverse transform function is selected to decode the signal. The criteria used in selecting a transform function to apply to a subsequent signal are adjusted based on a quality measure of the decoded signal and the record of selected transform functions.

US Patent:

7092580, Aug 15, 2006

Filed:

May 17, 2004

Appl. No.:

10/847988

Inventors:

Ke-Chiang Chu - Saratoga CA, US
Jian Lu - Santa Clara CA, US
Yu Tina Tian - Stanford CA, US

Assignee:

Apple Computer, Inc. - Cupertino CA

International Classification:

G06K 9/40

US Classification:

382268, 382275, 382168

Abstract:

A system and method using edge processing to remove blocking artifacts comprises an edge processor having an image converter for building an edge representation of a received image, a statistics analyzer for compiling a histogram containing edge intensities of the edge representation, a reference calculator for using the histogram to compute reference values corresponding to the blocking artifacts and an artifact remover for identifying and removing the blocking artifacts using the computed reference values.

US Patent:

7346106, Mar 18, 2008

Filed:

Dec 30, 2003

Appl. No.:

10/751345

Inventors:

Wenqing Jiang - San Jose CA, US
Jian Lu - Sunnyvale CA, US
Gregory K. Wallace - Palo Alto CA, US
Peter Chou - Mountain View CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04N 7/12

US Classification:

37524012

Abstract:

An encoding manager performs a first-pass encoding of a video sequence, collecting modeling data concerning the sequence in the process. The encoding manager utilizes collected data to construct a model concerning the sequence, the model including bit overhead for each frame and data concerning transitions that occur during the sequence. The encoding manager uses the data model to generate a rate profile for the video sequence, avoiding buffer underflow by allocating bits from hard to easy segments as needed. The encoding manager utilizes the rate profile to perform a second-pass encoding of the video sequence, adjusting quantization and bit rate for frames as necessary to avoid underflow and conform to the bit budget for the video sequence.

US Patent:

7577306, Aug 18, 2009

Filed:

May 16, 2006

Appl. No.:

11/436113

Inventors:

Yu Tina Tian - Stanford CA, US
Jian Lu - Santa Clara CA, US
Ke-Chiang Chu - Saratoga CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

G06K 9/36
G06K 9/46

US Classification:

382239, 382232

Abstract:

In a digital signal processing system, a method for selecting a transform function to apply to an input signal based on characteristics of the signal, and for self-adjusting criteria which are used in selecting a transform function to apply to a subsequent signal. Characteristics are obtained from the signal. The characteristics are compared to adjustable criteria which are used in selecting a transform function. Differing criteria are maintained for the different selectable transform functions. A record is maintained of transform functions selected and the particular characteristics that caused the selection. Based on the ability of a transform function to minimally define the coded signal, an inverse transform function is selected to decode the signal. The criteria used in selecting a transform function to apply to a subsequent signal are adjusted based on a quality measure of the decoded signal and the record of selected transform functions.

US Patent:

7713903, May 11, 2010

Filed:

Aug 25, 2008

Appl. No.:

12/197940

Inventors:

John Robert Lockemeyer - Sugar Land TX, US
Jian Lu - Bellaire TX, US
Nga Thi-Huyen Vi - Katy TX, US

Assignee:

Shell Oil Company - Houston TX

International Classification:

B01J 21/02
C07D 301/06
C07D 301/08
C07D 301/10
C07C 31/18
C07C 213/02
C07C 213/04

US Classification:

502202, 502203, 549532, 549533, 549534, 564475, 568680, 568853

Abstract:

A carrier that may be used in the manufacture of an olefin epoxidation catalyst is provided that is prepared from a process involving depositing boron on the carrier and subsequently calcining the carrier. Also provided is an olefin epoxidation catalyst comprising a silver component deposited on such a calcined carrier. Also provided is a process for the epoxidation of an olefin employing such a catalyst and a process for producing a 1,2-diol, a 1,2-diol ether, or an alkanolamine employing the olefin oxide.