Qian Rev T Chen

US Patent:

20110118975, May 19, 2011

Filed:

Nov 18, 2009

Appl. No.:

12/621403

Inventors:

Qian Chen - Fremont CA, US

Assignee:

TELENAV, INC. - Sunnyvale CA

International Classification:

G01C 21/00

US Classification:

701201, 701200, 701204

Abstract:

A method of operation of a navigation system includes: operating a communication unit for establishing a communication link between a first device and a second device; receiving a user defined destination; displaying a first location and a first route to the user defined destination on the first device and the second device, where the first location represents the location of the first device; and displaying a second location and a second route to the user defined destination on the first device and the second device, where the second location represents the location of the second device.

US Patent:

20110137556, Jun 9, 2011

Filed:

Dec 9, 2009

Appl. No.:

12/634621

Inventors:

Qian Chen - Fremont CA, US

Assignee:

TELENAV, INC. - Sunnyvale CA

International Classification:

G01C 21/26

US Classification:

701207, 701200

Abstract:

A method of operation of a navigation system includes: configuring a preference; selecting an introduction point based on the preference; composing an introduction message about the introduction point; and displaying a non-intrusive notification for the introduction message on a device.

US Patent:

20130243091, Sep 19, 2013

Filed:

Sep 14, 2012

Appl. No.:

13/615925

Inventors:

Yan Ye - San Diego CA, US
Qian Chen - Live Oak CA, US
Jie Dong - San Diego CA, US

Assignee:

VID SCALE, INC. - Wilmington DE

International Classification:

H04N 7/46

US Classification:

37524016

Abstract:

Systems, methods, and instrumentalities are disclosed relating to intra prediction of a video signal based on mode-dependent subsampling. A block of coefficients associated with a first sub block of a video block, one or more blocks of coefficients associated with one or more remaining sub blocks of the video block, and an indication of a prediction mode for the video block may be received. One or more interpolating techniques, a predicted first sub block, and the predicted sub blocks of the one or more remaining sub blocks may be determined. A reconstructed first sub block and one or more reconstructed remaining sub blocks may be generated. A reconstructed video block may be formed based on the prediction mode, the reconstructed first sub block, and the one or more reconstructed remaining sub blocks.

US Patent:

20130243104, Sep 19, 2013

Filed:

Nov 22, 2011

Appl. No.:

13/988470

Inventors:

Qian Chen - Santa Clara CA, US
Yunfei Zheng - Cupertino CA, US
Peng Yin - Ithaca CA, US
Xiaoan Lu - Princeton NJ, US
Joel Sole - La Jolla CA, US

Assignee:

Thomson Licensing - Issy de Moulineaux

International Classification:

H04N 7/26

US Classification:

37524029

Abstract:

Various implementations provide filtering for pictures. Several such implementations attempt to reduce artifacts caused by over-filtering in a decoding loop. Certain of these implementations provide multiple loop filters, and select a loop filter based on the result of a deblocking filter. One particular implementation applies a first filter to a picture to produce a filtered picture. A second filter is selected based on a difference between a value of a particular pixel in the filtered picture and a value of a corresponding pixel in the picture. The second filter is applied to the particular pixel in the filtered picture. In another implementation, a signal or signal structure includes an indication of the second filter, an encoding of at least a portion of a picture, and an encoding of at least a portion of a subsequent picture that has been encoded based on the output of the second filter above.

US Patent:

20130329778, Dec 12, 2013

Filed:

Jun 3, 2013

Appl. No.:

13/908926

Inventors:

Qian Chen - Santa Clara CA, US
Hubert Koepfer - Milpitas CA, US
Sheng Qu - San Jose CA, US

International Classification:

H04N 7/26

US Classification:

37524001

Abstract:

An encoder receives one or more input pictures of enhanced dynamic range (EDR) to be encoded in a coded bit stream comprising a base layer and one or more enhancement layer. The encoder comprises a base layer quantizer (BLQ) and an enhancement layer quantizer (ELQ) and selects parameters of the BLQ and the ELQ by a joint BLQ-ELQ adaptation method which given a plurality of candidate sets of parameters for the BLQ, for each candidate set, computes a joint BLQ-ELQ distortion value based on a BLQ distortion function, an ELQ distortion function, and at least in part on the number of input pixels to be quantized by the ELQ. The encoder selects as the output BLQ parameter set the candidate set for which the computed joint BLQ-ELQ distortion value is the smallest. Example ELQ, BLQ, and joint BLQ-ELQ distortion functions are provided.

US Patent:

20220408109, Dec 22, 2022

Filed:

Aug 26, 2022

Appl. No.:

17/896350

Inventors:

- Wilmington DE, US
Qian Chen - San Jose CA, US
Jie Dong - San Diego CA, US

Assignee:

VID SCALE, INC. - Wilmington DE

International Classification:

H04N 19/52
H04N 19/176
H04N 19/119
H04N 19/46
H04N 19/593
H04N 19/11
H04N 19/124
H04N 19/14
H04N 19/80
H04N 19/90
H04N 19/60
H04N 19/59
H04N 19/182

Abstract:

Systems, methods, and instrumentalities are disclosed relating to intra prediction of a video signal based on mode-dependent subsampling. A block of coefficients associated with a first sub block of a video block, one or more blocks of coefficients associated with one or more remaining sub blocks of the video block, and an indication of a prediction mode for the video block may be received. One or more interpolating techniques, a predicted first sub block, and the predicted sub blocks of the one or more remaining sub blocks may be determined. A reconstructed first sub block and one or more reconstructed remaining sub blocks may be generated. A reconstructed video block may be formed based on the prediction mode, the reconstructed first sub block, and the one or more reconstructed remaining sub blocks.

US Patent:

20230076068, Mar 9, 2023

Filed:

Aug 31, 2022

Appl. No.:

17/900809

Inventors:

- Menlo Park CA, US
Qian Chen - Newark CA, US
Chengyuan Yan - San Bruno CA, US

International Classification:

G06F 3/01
G06F 3/0346
G06F 3/038
A63F 13/235
A63F 13/212
A63F 13/211

Abstract:

A method of interpreting a digit-to-digit gesture based on roll values for a wrist-wearable device is disclosed. The method includes, receiving an indication at a first point in time that a user donning the wrist-wearable device is providing a digit-to-digit gesture in which one of the user's digits touches another of the user's digits without contacting the display of the wearable device. The method further includes, in accordance with a determination that the digit-to-digit gesture is provided while data indicates that the wrist-wearable device has a first roll value, causing a target device in communication with the wearable device to perform a first input command and receiving another indication at a second point in time that is after the first point in time that the user is providing the digit-to-digit gesture again, causing the target device to perform a second input command that is distinct from the first input command.

US Patent:

20210160512, May 27, 2021

Filed:

Nov 21, 2019

Appl. No.:

16/691571

Inventors:

- Menlo Park CA, US
Pankaj Sethi - Los Altos CA, US
Shankar Lakshmi Regunathan - Redmond WA, US
Yun Zhang - Fremont CA, US
Jae Kim - Los Gatos CA, US
Qian Chen - San Jose CA, US

International Classification:

H04N 19/179
H04N 19/147
H04N 21/2365

Abstract:

The disclosed computer-implemented method may include (1) receiving a video with scenes, (2) creating an encoded video having an overall bitrate by (a) determining, for each of the scenes, a rate-distortion model, (b) determining, for each of the scenes, a downsampling-distortion model, (c) using the rate-distortion models of the scenes to determine, for each of the scenes, a per-scene bitrate that satisfies the overall bitrate, (d) determining, for each of the scenes, a per-scene resolution for the scene based on the rate-distortion model of the scene and the downsampling-distortion model of the scene, and (e) creating, for each of the scenes, an encoded scene having the per-scene bitrate of the scene and the per-scene resolution of the scene, and (3) streaming the encoded video at the overall bitrate by streaming the encoded scene of one of the scenes. Various other methods, systems, and computer-readable media are also disclosed.