Zhi J Zhang

US Patent:

56877242, Nov 18, 1997

Filed:

Jan 23, 1995

Appl. No.:

8/377281

Inventors:

Don Lee Jewett - Mill Valley CA
Zhi Zhang - San Francisco CA

Assignee:

Abratech Corporation - Sausalito CA

International Classification:

A61B 505

US Classification:

1286531

Abstract:

The present invention encompasses apparatus and methods for determining variations in estimated signal-generator parameters derived from signals created by signal-generators, such as signal-generators within organs of the body, such as brain, head, spinal cord, and muscles. The present invention is particularly useful when more than one signal generator is non-zero in part or all of the time-interval analyzed. The parameters of a signal-generator that may be of interest include, but are not limited to, magnitude, location, and/or orientation, over single or multiple points in time.

US Patent:

20170195717, Jul 6, 2017

Filed:

Dec 30, 2015

Appl. No.:

14/984668

Inventors:

- San Jose CA, US
Zhi Zhang - San Jose CA, US
Guanghan Ning - San Jose CA, US
Xiaobo Ren - San Jose CA, US

International Classification:

H04N 21/44
H04N 21/4223
G06F 17/30
H04N 21/439
H04N 21/6379
H04N 21/41
H04N 21/81

Abstract:

A method for a mobile search-ready smart display system containing a smart display having a screen and at least one mobile device having a camera including extracting a plurality of video fingerprints from an ongoing content displayed on the screen. The ongoing content has video frames corresponding to the video fingerprints; determining one or more representative video fingerprints of the video frames from the plurality of video fingerprints; generating one or more encoded representative video fingerprints through encoding the one or more representative video fingerprints into a pixel translucency change; and delivering the one or more encoded representative video fingerprints via a screen-camera communication. The method also includes optimizing the encoding of the one or more representative video fingerprints and the delivering of the one or more encoded representative video fingerprints to find a balance between an error resilience and transmission time.

US Patent:

20170060862, Mar 2, 2017

Filed:

Aug 25, 2015

Appl. No.:

14/835004

Inventors:

- San Jose CA, US
GUANGHAN NING - San Jose CA, US
ZHI ZHANG - San Jose CA, US
XIAOBO REN - San Jose CA, US

International Classification:

G06F 17/30

Abstract:

A content retrieval method including: extracting a plurality of fingerprints including a plurality of video fingerprints and audio fingerprints from contents stored in a content database; determining representative video fingerprints of the video frames and representative audio fingerprints of the audio sequences; determining a data rate indicating a storage limitation and a coverage indicating a number of searching results to be returned; storing selected representative video fingerprints and representative audio fingerprints based on the storage limitation indicated by the data rate in a fingerprint database; receiving a query containing at least one of video data and audio data submitted by a user; extracting at least one query fingerprint representing the query; determining a number of fingerprints most matching the query fingerprint based on the coverage to generate search results indicating matching contents represented by the number of most matching fingerprints; and returning the search results to the user.