David P Conrad

US Patent:

8324517, Dec 4, 2012

Filed:

Dec 19, 2009

Appl. No.:

12/642771

Inventors:

David James Conrad - Newark CA, US

Assignee:

Luidia, Inc. - San Carlos CA

International Classification:

G06F 3/043
G01S 3/80

US Classification:

178 1804, 345177, 345179, 345173, 178 1902, 367128, 367124, 367127

Abstract:

A pen transcription system and method for locating a moveable signal source are disclosed. The transcription system includes a base having a planar base surface, first and second acoustical sensors that detect an acoustical signal emitted by a moveable signal source, the acoustical sensors being mounted on the base and separated from one another. The difference in time of detection between an EM signal and the acoustical signals is measured to determine the position of the moveable source. The acoustical sensors include a housing surrounding a detector. The housing has an aperture having a width that is less than the wavelength of said acoustical signal divided by 6. 28 and a height that is substantially equal to an integer multiple of a wavelength of an interfering acoustical signal.

US Patent:

20120195356, Aug 2, 2012

Filed:

Jan 31, 2011

Appl. No.:

13/018363

Inventors:

Feng YI - San Jose CA, US
Chris Y. CHUNG - Sunnyvale CA, US
David CONRAD - Sunnyvale CA, US
Jiefu ZHAI - San Jose CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

H04N 7/26
H04B 17/00

US Classification:

375224, 37524002, 37524003, 375E07126, 375E07139

Abstract:

A video coding system and method that dynamically controls coding parameters to satisfy a resource usage requirement. A resource controller may set parameters or parameter thresholds to change the coding complexity of the video coding system and to effectuate a change in the resource usage rate. Parameters may include the frame rate, the frame resolution, the bit rate, or pixel block sizes. A parameter or parameter threshold adjustment may be based on system resource data, for example, power consumption, CPU usage, fan speed, battery status, input video statistics, coding latency, and other video encoder internal states.

US Patent:

20120307904, Dec 6, 2012

Filed:

Jun 4, 2012

Appl. No.:

13/487498

Inventors:

Feng Yi - San Jose CA, US
David R. Conrad - Sunnyvale CA, US
Chris Y. Chung - Sunnyvale CA, US

Assignee:

APPLE INC. - Cupertino CA

International Classification:

H04N 7/32
H04N 7/12

US Classification:

37524016, 37524025, 375E07105, 375E07243

Abstract:

Embodiments of the present invention provide techniques for efficiently coding/decoding video data during circumstances where a decoder only requires or utilizes a portion of coded frames. A coder may exchange signaling with a decoder to identify unused areas of frames and prediction modes for the unused areas. An input frame may be parsed into a used area and an unused area based on the exchanged signaling. If motion vectors of the input frame are not limited to the used areas of the reference frames, the unused area of the input frame may be coded using low complexity. If the motion vectors of the input frame are limited to the used areas of the reference frames, the pixel blocks in the unused area of the input frame may not be coded, or the unused area of the input frame may be filled with gray, white, or black pixel blocks.

US Patent:

20200382806, Dec 3, 2020

Filed:

May 26, 2020

Appl. No.:

16/882819

Inventors:

- Cupertino CA, US
Peikang SONG - San Jose CA, US
Beibei WANG - Cupertino CA, US
Giribalan GOPALAN - Cupertino CA, US
Albert E. KEINATH - Sunnyvale CA, US
Christopher M. GARRIDO - Cupertino CA, US
David R. CONRAD - Sunnyvale CA, US
Ming JIN - Cupertino CA, US
Hang YUAN - San Jose CA, US
Xiaohua YANG - San Jose CA, US
Xiaosong ZHOU - Campbell CA, US
Vikrant KASARABADA - Cupertino CA, US
Davide CONCION - San Jose CA, US
Eric L. CHIEN - Cupertino CA, US
Bess C. CHAN - Cupertino CA, US
Karthick SANTHANAM - Cupertino CA, US
Gurtej Singh CHANDOK - Cupertino CA, US

International Classification:

H04N 19/507
H04N 19/65

Abstract:

Techniques are disclosed for coding video data in which frames from a video source are partitioned into a plurality of tiles of common size, and the tiles are coded as a virtual video sequence according to motion-compensated prediction, each tile treated as having respective temporal location of the virtual video sequence. The coding scheme permits relative allocation of coding resources to tiles that are likely to have greater significance in a video coding session, which may lead to certain tiles that have low complexity or low motion content to be skipped during coding of the tiles for select source frames. Moreover, coding of the tiles may be ordered to achieve low coding latencies during a coding session.

US Patent:

20200296426, Sep 17, 2020

Filed:

Jun 2, 2020

Appl. No.:

16/890245

Inventors:

- Cupertino CA, US
Dazhong Zhang - Milpitas CA, US
Xiaosong Zhou - Campbell CA, US
Chris Y. Chung - Sunnyvale CA, US
Peikang Song - San Jose CA, US
David R. Conrad - Sunnyvale CA, US
Jae Hoon Kim - San Jose CA, US
Yunfei Zheng - Cupertino CA, US

International Classification:

H04N 19/82
H04N 19/186

Abstract:

Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

US Patent:

20200007494, Jan 2, 2020

Filed:

Sep 13, 2019

Appl. No.:

16/570505

Inventors:

- SAN FRANCISCO CA, US
Lee Hahn Holloway - Santa Cruz CA, US
David Randolph Conrad - Los Altos CA, US
Matthieu Philippe François Tourne - San Francisco CA, US

International Classification:

H04L 29/12
H04L 29/08
H04L 29/06

Abstract:

A first packet of a first protocol version type that includes an incoming request for an action to be performed on an identified resource is received from a client at a proxy server as a result of a DNS request resolving to a network address of the proxy server. The proxy server transmits an outgoing request for the action to be performed on the identified resource to a network address of the destination origin server in a second packet that is of the second protocol version type. The proxy server receives a third packet that includes an incoming response from the destination origin server, the third packet being of the second protocol version type. The proxy server transmits a fourth packet to the client, the fourth packet being of the first protocol version type, wherein the fourth packet includes an outgoing response that is based on the incoming response.

US Patent:

20180338161, Nov 22, 2018

Filed:

Jul 31, 2018

Appl. No.:

16/050744

Inventors:

- Cupertino CA, US
Dazhong Zhang - Milpitas CA, US
Xiaosong Zhou - Campbell CA, US
Chris Y. Chung - Sunnyvale CA, US
Peikang Song - San Jose CA, US
David R. Conrad - Sunnyvale CA, US
Jae Hoon Kim - San Jose CA, US
Yunfei Zheng - Cupertino CA, US

International Classification:

H04N 19/82
H04N 19/186

Abstract:

Chroma deblock filtering of reconstructed video samples may be performed to remove blockiness artifacts and reduce color artifacts without over-smoothing. In a first method, chroma deblocking may be performed for boundary samples of a smallest transform size, regardless of partitions and coding modes. In a second method, chroma deblocking may be performed when a boundary strength is greater than 0. In a third method, chroma deblocking may be performed regardless of boundary strengths. In a fourth method, the type of chroma deblocking to be performed may be signaled in a slice header by a flag. Furthermore, luma deblock filtering techniques may be applied to chroma deblock filtering.

US Patent:

20150350686, Dec 3, 2015

Filed:

May 29, 2014

Appl. No.:

14/290304

Inventors:

- Cupertino CA, US
Chris Y. Chung - Sunnyvale CA, US
David R. Conrad - Sunnyvale CA, US
Dazhong Zhang - Milpitas CA, US
Feng Yi - San Jose CA, US
Jae Hoon Kim - San Jose CA, US
Jiefu Zhai - San Jose CA, US
Peikang Song - San Jose CA, US
Yunfei Zheng - Cupertino CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04N 19/85
H04N 19/115
H04N 19/517
H04N 19/51
H04N 19/172
H04N 19/176

Abstract:

A method and system of using a pre-encoder to improve encoder efficiency. The encoder may conform to ITU-T H.265 and the pre-encoder may conform to ITU-T H. 264. The pre-encoder may receive source video data and provide information regarding various coding modes, candidate modes, and a selected mode for coding the source video data. In an embodiment, the encoder may directly use the mode selected by the pre-encoder. In another embodiment, the encoder may receive both the source video data and information regarding the various coding modes (e.g., motion information, macroblock size, intra prediction direction, rate-distortion cost, and block pixel statistics) to simplify and/or refine its mode decision process. For example, the information provided by the pre-encoder may indicate unlikely modes, which unlikely modes need not be tested by the encoder, thus saving power and time.