Ho S Lee

US Patent:

59131896, Jun 15, 1999

Filed:

Feb 12, 1997

Appl. No.:

8/798690

Inventors:

Ho Lee - San Diego CA
Jeanne Hall - San Diego CA
Dan Housam - Jefferson MD

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

G10L 300
H04L 1500

US Classification:

704226

Abstract:

A communication system, and related method, for reliably transmitting DTMF code signals through a low-bit rate channel employing a VSELP speech compression algorithm. The system adds relatively low-level noise to the analog DTMF signals before encoding by the compression algorithm. By adding the low-level noise to the DTMF signals, the tones associated with the DTMF signals can be reliably detected on the receiving end.

US Patent:

56029136, Feb 11, 1997

Filed:

Sep 22, 1994

Appl. No.:

8/310614

Inventors:

Ho Lee - San Diego CA
Budi Hardiman - San Diego CA

Assignee:

Hughes Electronics - Los Angeles CA

International Classification:

H04M 158

US Classification:

379406

Abstract:

A device and method for detecting and suppressing double-talk in a cellular mobile unit employ a cellular transceiver; a receive signal path; a transmit signal path; and a double-talk detector. The double-talk detector determines a receive slope of a receive signal, and determines a transmit slope of a transmit signal. The double-talk detector further determines a difference slope of a difference signal that is determined by evaluating differences between the receive signal and the transmit signal. Finally, the double-talk detector generates a double-talk flag signal in the event the transmit slope indicates an increasing transmit speech power, and the receive slope and the difference slope indicate a prescribed relationship between the changes in the receive speech power and the difference power.

US Patent:

56339828, May 27, 1997

Filed:

Oct 21, 1996

Appl. No.:

8/734210

Inventors:

Kalyan Ganesan - Germantown MD
Ho Lee - San Diego CA
Prabhat Gupta - Germantown MD

Assignee:

Hughes Electronics - Los Angeles CA

International Classification:

G10L 900
G10L 506

US Classification:

395 242

Abstract:

The perception of speech processed by a CELP based coder, such as a VSELP coder, when operating in noisy background conditions is improved by removing swirl artifacts during silence periods. This is done by removing the low frequency components of the input signal when no speech is detected. A speech activity detector distinguishes between a periodic signal, like speech, and a non-periodic signal, like noise by using most of the VSELP coder internal parameters to determine the speech or non-speech conditions. To prevent the VSELP coder from determining pitches for non-periodic signals, a high pass filter is applied to the input signal to remove the pitch information for which the VSELP coder searches.

US Patent:

20210105392, Apr 8, 2021

Filed:

Oct 2, 2019

Appl. No.:

16/591543

Inventors:

- San Diego CA, US
Ho Sang Lee - San Diego CA, US
Ying Noyes - San Diego CA, US

International Classification:

H04N 5/235
H04N 5/33
G03B 15/05
G03B 7/17
G03B 7/097

Abstract:

Methods, systems, and devices for operating a camera-enabled device are described. The camera-enabled device may emit, via a first light emitting source, an infrared light in a physical environment and determine time-of-flight information associated with a target object in the physical environment based on the emitted infrared light. The camera-enabled device may estimate one or more exposure settings based on the time-of-flight information, and emit, via a second light emitting source, a visible light in the physical environment based on the estimated one or more exposure settings. As a result, the camera-enabled device may capture an image of the physical environment based on the emitted visible light and the estimated one or more exposure settings.

US Patent:

20210105448, Apr 8, 2021

Filed:

Oct 3, 2019

Appl. No.:

16/592648

Inventors:

- San Diego CA, US
Ho Sang Lee - San Diego CA, US
Pradeep Veeramalla - Hyderabad, IN
Anshul Maheshwari - Hyderabad, IN
Shivakumar Manda - Hyderabad, IN

International Classification:

H04N 9/73
H04N 5/232
G06T 5/50

Abstract:

Methods, systems, and devices for image processing at a device are described. The present disclosure may relate to capturing a first frame of image samples and a second frame of image samples of an image sensor after capturing the first frame of image samples, determining that a white balance confidence level of the second frame does not satisfy a confidence threshold, retrieving the first frame of image samples based on determining that the white balance confidence level of the second frame does not satisfy the confidence threshold, combining at least a portion of the image samples of the first frame with the image samples of the second frame, and determining a white balance setting for the second frame based on combining at least the portion of the image samples of the first frame with the image samples of the second frame.

US Patent:

20200278833, Sep 3, 2020

Filed:

Feb 27, 2020

Appl. No.:

16/802984

Inventors:

- San Diego CA, US
Ho Sang Lee - San Diego CA, US

International Classification:

G06F 3/16
G10L 15/183
H04N 9/31

Abstract:

Methods, devices, and systems for determining image capture settings based on an audio input are disclosed. In some aspects, a device includes a memory, a camera including a lens and a sensor, and a processor coupled to the camera and the memory. The processor may be configured to receive an audio input, determine contextual information based on the audio input, determine one or more image capture settings based on the contextual information, and output the one or more image capture settings.

US Patent:

20190311464, Oct 10, 2019

Filed:

Apr 5, 2018

Appl. No.:

15/946622

Inventors:

- San Diego CA, US
Wei-Chih Liu - Taipei City, TW
Kyuseo Han - San Diego CA, US
Ying Noyes - San Diego CA, US
Ho Sang Lee - San Diego CA, US

International Classification:

G06T 5/00
G06T 7/90

Abstract:

A device may obtain a pixel array representing an image and identify one or more representative metrics for the pixel array. The device may retrieve a first version of a mesh defining a color space, wherein the mesh includes a plurality of vertices and each vertex is associated with a respective set of color balance parameters. The device may identify a point in the color space corresponding to the pixel array based on the one or more representative metrics for the pixel array. The device may receive a tuning input comprising a set of color balance parameters for the point and generate a second version of the mesh by adding the point and the set of color balance parameters to the first version of the mesh. The device may output at least one color-corrected image based at least in part on the second version of the mesh.

US Patent:

20190253682, Aug 15, 2019

Filed:

Sep 18, 2018

Appl. No.:

16/134087

Inventors:

- San Diego CA, US
Ho Sang Lee - San Diego CA, US
Kyuseo Han - San Diego CA, US
Pradeep Veeramalla - Hyderabad, IN

International Classification:

H04N 9/73
H04N 5/235

Abstract:

Aspects of the present disclosure relate to systems and methods for performing automatic white balance (AWB). An example device may include a memory and a processor coupled to the memory. The processor may be configured to receive a first image of a scene, measure a first illuminant of the first received image, compare the first illuminant and a first illuminant value, determine the scene is changing between the first received image and a previous image based on the comparison, adjust a first AWB convergence rate to a second AWB convergence rate in response to determining the scene is changing, and converge from a first balancing factor to a second balancing factor for one or more white balance operations based on the second AWB convergence rate.