Patents by Inventor Yu Tina Tian
Yu Tina Tian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7929778Abstract: 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.Type: GrantFiled: August 10, 2009Date of Patent: April 19, 2011Assignee: Apple Inc.Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Publication number: 20100067792Abstract: 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.Type: ApplicationFiled: August 10, 2009Publication date: March 18, 2010Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Patent number: 7577306Abstract: 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.Type: GrantFiled: May 16, 2006Date of Patent: August 18, 2009Assignee: Apple Inc.Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Patent number: 7092580Abstract: 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.Type: GrantFiled: May 17, 2004Date of Patent: August 15, 2006Assignee: Apple Computer, Inc.Inventors: Ke-Chiang Chu, Jian Lu, Yu Tina Tian, Hsi-Jung Wu
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Patent number: 7079695Abstract: 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.Type: GrantFiled: August 7, 2003Date of Patent: July 18, 2006Assignee: Apple Computer, Inc.Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Publication number: 20040264800Abstract: 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.Type: ApplicationFiled: May 17, 2004Publication date: December 30, 2004Inventors: Ke-Chiang Chu, Jian Lu, Yu Tina Tian, Hsi-Jung Wu
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Patent number: 6798918Abstract: 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.Type: GrantFiled: April 17, 2002Date of Patent: September 28, 2004Assignee: Apple Computer, Inc.Inventors: Ke-Chiang Chu, Jian Lu, Yu Tina Tian, Hsi-Jung Wu
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Publication number: 20040032988Abstract: 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.Type: ApplicationFiled: August 7, 2003Publication date: February 19, 2004Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Patent number: 6618509Abstract: 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.Type: GrantFiled: April 9, 2001Date of Patent: September 9, 2003Assignee: Apple Computer, Inc.Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Publication number: 20020110284Abstract: 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.Type: ApplicationFiled: April 17, 2002Publication date: August 15, 2002Inventors: Ke-Chiang Chu, Jian Lu, Yu Tina Tian, Hsi-Jung Wu
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Patent number: 6389177Abstract: 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.Type: GrantFiled: July 2, 1996Date of Patent: May 14, 2002Assignee: Apple Computer, Inc.Inventors: Ke-Chiang Chu, Jian Lu, Yu Tina Tian, Hsi-Jung Wu
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Publication number: 20010033139Abstract: 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.Type: ApplicationFiled: April 9, 2001Publication date: October 25, 2001Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Patent number: 6229917Abstract: 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.Type: GrantFiled: September 14, 1999Date of Patent: May 8, 2001Assignee: Apple Computer, Inc.Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Patent number: 6011864Abstract: 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.Type: GrantFiled: July 3, 1996Date of Patent: January 4, 2000Assignee: Apple Computer, Inc.Inventors: Hsi-Jung Wu, Yu Tina Tian, Jian Lu, Ke-Chiang Chu
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Patent number: 5812199Abstract: A system for estimating block motion from a previous frame to a current frame, wherein motion vectors have been computed for blocks in the previous frame. The system comprises a P-checkerboard processor, an S-checkerboard processor and a block matching engine. The a P-checkerboard processor selects a first current block from a primary checkerboard pattern, retrieves motion vectors for reference blocks in the previous frame, and uses the retrieved motion vectors to generate a temporal search window. The block matching engine locates in the temporal search window a block which best matches the first current block, and determines the current motion vector from the best matching block to the first current block. Alternatively, the a P-checkerboard processor can use the retrieved motion vectors to interpolate the current motion vector. The S-checkerboard processor selects a second current block from a secondary checkerboard pattern, and uses the current motion vector to generate a spatial dynamic search window.Type: GrantFiled: July 11, 1996Date of Patent: September 22, 1998Assignee: Apple Computer, Inc.Inventors: Jian Lu, Ke-Chiang Chu, Yu Tina Tian, Hsi-Jung Wu