Taoran A Lu

US Patent:

20100098162, Apr 22, 2010

Filed:

Sep 3, 2009

Appl. No.:

12/553775

Inventors:

Taoran Lu - Gainesville FL, US
Zhifeng Chen - Gainesville FL, US
Dapeng Oliver Wu - Gainesville FL, US
Yu Huang - Plainsboro NJ, US
Jun Tian - Plainsboro NJ, US
Hong Heather Yu - West Windsor NJ, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04N 7/26

US Classification:

37524013, 375E07146

Abstract:

A system and method for region-of-interest-based bit-allocation scheme for video coding is provided. A method for encoding an image sequence of inter-frames and intra-frames includes grouping the inter-frames and the intra-frames in at least one group of pictures (GOP), and performing a frame-level bit-allocation to inter-frames and the intra-frames in the GOP. For each frame of the inter-frames and the intra-frames in the GOP, the method also includes partitioning the frame into a plurality of macroblocks, identifying macroblocks in the plurality of macroblocks as having regions of interest (ROI), and performing a macroblock level bit-allocation for the frame based on macroblocks identified as having ROI. The method further includes encoding the image sequence based on the bit-allocations, thereby producing an encoded image sequence, and outputting the encoded image sequence.

US Patent:

20120033949, Feb 9, 2012

Filed:

May 9, 2011

Appl. No.:

13/103810

Inventors:

Taoran Lu - Studio City CA, US
Zheng Yuan - Gainesville FL, US
Yu Huang - Bridgewater NJ, US
Dapeng Oliver Wu - Gainesville FL, US
Hong Heather Yu - West Windsor NJ, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

G11B 27/00

US Classification:

386285, 386278, 386E05028

Abstract:

In an embodiment, a method of creating a skimming preview of a video includes electronically receiving a plurality of video shots, analyzing each frame in a video shot from the plurality of video shots, where analyzing includes determining a saliency of each frame of the video shot. The method also includes determining a key frame of the video shot based on the saliency of each frame the video shot, extracting visual features from the key frame, performing shot clustering of the plurality of video shots to determine concept patterns based on the visual features, and generating a reconstruction reference tree based on the shot clustering. The reconstruction reference tree includes video shots categorized according to each concept pattern.

US Patent:

20130050574, Feb 28, 2013

Filed:

Aug 29, 2011

Appl. No.:

13/220000

Inventors:

Taoran Lu - Studio City CA, US
Zheng Yuan - Gainesville FL, US
Yu Huang - Bridgewater NJ, US
Dapeng Oliver Wu - Gainesville FL, US
Hong Heather Yu - West Windsor NJ, US

Assignee:

FutureWei Technologies Inc. - Plano TX

International Classification:

H04N 7/01

US Classification:

348441, 348E07003

Abstract:

A system and method for retargeting video sequences are provided. A method for retargeting a video includes a plurality of frames includes determining saliency information for the plurality of frames, determining a cost metric for the video, and retargeting the video based on the cost metric to produce a retargeted video. The cost metric considers loss due to cropping, scaling, temporal factors, and spatial factors. The retargeting makes use of a crop window for each frame in the plurality of frames.

US Patent:

20140010295, Jan 9, 2014

Filed:

Jan 19, 2012

Appl. No.:

13/980789

Inventors:

Taoran Lu - Santa Clara CA, US
Qian Xu - Folsom CA, US
Joel Sole - La Jolla CA, US
Peng Yin - Ithaca NY, US
Yunfei Zheng - San Jose CA, US
Xiaoan Lu - Princeton NJ, US

Assignee:

THOMSON LICENSING - Issy de Moulineaux

International Classification:

H04N 7/32

US Classification:

37524012

Abstract:

Methods and apparatus are provided for geometric-based intra prediction. An apparatus includes a video encoder for encoding picture data for at least a portion of a block in a picture by detecting a local geometric pattern in a surrounding area with respect to the portion, and performing at least one of interpolation and extrapolation with respect to an edge direction of the local geometric pattern to generate an intra prediction for the portion.

US Patent:

20220224946, Jul 14, 2022

Filed:

Mar 29, 2022

Appl. No.:

17/707581

Inventors:

- San Francisco CA, US
Fangjun Pu - Sunnyvale CA, US
Taoran Lu - Santa Clara CA, US
Tao Chen - Palo Alto CA, US
Walter J. Husak - Simi Valley CA, US
Sean Thomas McCarthy - San Francisco CA, US

Assignee:

DOLBY LABORATORIES LICENSING CORPORATION - San Francisco CA

International Classification:

H04N 19/85
H04N 19/119
H04N 19/136
H04N 19/147
H04N 19/159
H04N 19/176
H04N 19/46

Abstract:

Given a sequence of images in a first codeword representation, methods, processes, and systems are presented for image reshaping using rate distortion optimization, wherein reshaping allows the images to be coded in a second codeword representation which allows more efficient compression than using the first codeword representation. Syntax methods for signaling reshaping parameters are also presented.

US Patent:

20230073388, Mar 9, 2023

Filed:

Sep 21, 2022

Appl. No.:

17/950087

Inventors:

- San Francisco CA, US
Peng Yin - New York NY, US
Taoran Lu - Santa Clara CA, US
Fangjun Pu - Sunnyvale CA, US
Sean Thomas McCarthy - San Francisco CA, US
Walter J. Husak - Simi Valley CA, US
Tao Chen - Palo Alto CA, US

Assignee:

Dolby Laboratories Licensing Corporation - San Francisco CA

International Classification:

H04N 19/31
H04N 19/187
H04N 19/172
H04N 19/30
H04N 19/46
H04N 19/70

Abstract:

Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.

US Patent:

20210289212, Sep 16, 2021

Filed:

May 28, 2021

Appl. No.:

17/334631

Inventors:

- San Francisco CA, US
Taoran LU - Santa Clara CA, US
Tao CHEN - Palo Alto CA, US
Walter J. HUSAK - Simi Valley CA, US

Assignee:

DOLBY LABORATORIES LICENSING CORPORATION - San Francisco CA

International Classification:

H04N 19/167
H04N 19/117
H04N 19/124
H04N 19/17
H04N 19/132
H04N 19/182
H04N 19/60
H04N 19/70
H04L 12/26

Abstract:

Sample data and metadata related to spatial regions in images may be received from a coded video signal. It is determined whether specific spatial regions in the images correspond to a specific region of luminance levels. In response to determining the specific spatial regions correspond to the specific region of luminance levels, signal processing and video compression operations are performed on sets of samples in the specific spatial regions. The signal processing and video compression operations are at least partially dependent on the specific region of luminance levels.

US Patent:

20210281866, Sep 9, 2021

Filed:

Mar 19, 2021

Appl. No.:

17/206843

Inventors:

- San Francisco CA, US
Taoran LU - Santa Clara CA, US
Tao CHEN - Palo Alto CA, US

Assignee:

DOLBY LABORATORIES LICENSING CORPORATION - San Francisco CA

International Classification:

H04N 19/33
H04N 19/105
H04N 19/59
H04N 19/80

Abstract:

The precision of up-sampling operations in a layered coding system is preserved when operating on video data with high bit-depth. In response to bit-depth requirements of the video coding or decoding system, scaling and rounding parameters are determined for a separable up-scaling filter. Input data are first filtered across a first spatial direction using a first rounding parameter to generate first up-sampled data. First intermediate data are generated by scaling the first up-sampled data using a first shift parameter. The intermediate data are then filtered across a second spatial direction using a second rounding parameter to generate second up-sampled data. Second intermediate data are generated by scaling the second up-sampled data using a second shift parameter. Final up-sampled data may be generated by clipping the second intermediate data.