Kwan P Cheung, 71Katy, TX

7328153, Feb 5, 2008

Jul 22, 2002

10/200034

Maxwell Wells - Seattle WA, US
Vidya Venkatachalam - Bellevue WA, US
Luca Cazzanti - Bellevue WA, US
Kwan Fai Cheung - Bellevue WA, US
Navdeep Dhillon - Seattle WA, US
Somsak Sukittanon - Seattle WA, US

Gracenote, Inc. - Emeryville CA

G10L 11/00
G10L 15/00

704231, 704238, 704243, 704270, 704273

Copies of original sound recordings are identified by extracting features from the copy, creating a vector of those features, and comparing that vector against a database of vectors. Identification can be performed for copies of sound recordings that have been subjected to compression and other manipulation such that they are not exact replicas of the original. Computational efficiency permits many hundreds of queries to be serviced at the same time. The vectors may be less than 100 bytes, so that many millions of vectors can be stored on a portable device.

7881931, Feb 1, 2011

Feb 4, 2008

12/025373

Maxwell Wells - Seattle WA, US
Vidya Venkatachalam - Bellevue WA, US
Luca Cazzanti - Bellevue WA, US
Kwan Fai Cheung - Bellevue WA, US
Navdeep Dhillon - Seattle WA, US
Somsak Sukittanon - Seattle WA, US

Gracenote, Inc. - Emeryville CA

G10L 15/06

704243, 704245

Copies of original sound recordings are identified by extracting features from the copy, creating a vector of those features, and comparing that vector against a database of vectors. Identification can be performed for copies of sound recordings that have been subjected to compression and other manipulation such that they are not exact replicas of the original. Computational efficiency permits many hundreds of queries to be serviced at the same time. The vectors may be less than 100 bytes, so that many millions of vectors can be stored on a portable device.

8229751, Jul 24, 2012

Dec 30, 2005

11/322706

Kwan Cheung - Bryn Mawr PA, US

Mediaguide, Inc. - King of Prussia PA

G10L 11/00

704270, 704276

A system and method of detecting unidentified broadcast electronic media content using a self-similarity technique is presented. The process and system catalogues repeated instances of content that has not be positively identified, but are sufficiently similar as to infer repetitive broadcasts. These catalogued instances may be further processed on the basis of different broadcast channels, sources, geographic locations of broadcasts or format to further assist the identification thereof.

8468183, Jun 18, 2013

Feb 16, 2005

10/598283

Kwan Cheung - Bryn Mawr PA, US

Mobile Research Labs Ltd. - Hod Hasharon

G06F 7/00

708200, 708400, 348 1402

This invention relates to the automatic detection and identification of broadcast programming, for example music, speech or video that is broadcast over radio, television, the Internet or other media. “Broadcast” means any readily available source of content, whether now known or hereafter devised, including streaming, peer to peer delivery or detection of network traffic. A known program is registered by deriving a numerical code for each of many short time segments during the program and storing the sequence of numerical codes and a reference to the identity of the program. Detection and identification of an input signal occurs by similarly extracting the numerical codes from it and comparing the sequence of detected numerical codes against the stored sequences. Testing criteria is applied that optimizes the rate of correct detections of the registered programming. Other optimizations in the comparison process are used to expedite the comparison process.

2008026, Oct 23, 2008

Nov 14, 2006

12/093453

Kwan Cheung - Bryn Mawr PA, US

MEDIAGUIDE, INC. - Berwyn PA

G06F 17/30

707 6, 707E17014, 707E17027, 707E17101

A system and method of detecting unidentified broadcast electronic media content using a self-similarity technique is presented. The process and system catalogues repeated instances of content that has not be positively identified, but are sufficiently similar as to infer repetitive broadcasts. These catalogued instances may be further processed on the basis of different broadcast channels, sources, geographic locations of broadcasts or format to further assist the identification thereof.

2009000, Jan 1, 2009

Feb 26, 2008

12/037876

Kwan Cheung - Bryn Mawr PA, US

MEDIAGUIDE, INC. - Berwyn PA

G06F 17/30
H04N 7/173

707 3, 725110

A method of detecting the identity of video programming is described, whereby known video programming is converted into a set of pattern vectors stored in a database and incoming detected video programming is converted into a set of pattern vectors that are used to search the database for matching pattern vectors indicating a match with the known video programming.

2013031, Nov 28, 2013

May 13, 2013

13/892912

Kwan Cheung - Bryn Mawr PA, US

Mobile Research Labs, Ltd. - Hod Hasharon

G06F 17/30

707746, 707741

A method and system for tracking use of audio and audiovisual works is described. Known are converted into a time series of frequency domain signatures. As the system detects unknown works transmitted or otherwise available for analysis, the unknown works are converted into a time series of frequency domain signatures and then the sequence of signatures matched in the database of known works. When a known work is found to have signatures that meet a matching test with an unknown work, a database is updated to reflect that the unknown work is an instance of the known work. The system includes a remote detector that receives unknown content and generates signatures that are transmitted to another location for where the matching is performed.