1
William L Thomas, Daozheng Lu: Audience measurement system utilizing ancillary codes and passive signatures. A C Nielsen Company, Marshall O Toole Gerstein Murray & Borun, January 2, 1996: US05481294 (620 worldwide citation)

An audience measurement system collects data representative of tuned programs rather than of tuned channels, and includes (i) a household metering apparatus which records ancillary codes or extracts program signatures from the programs if no ancillary codes are found therein, (ii) a reference appara ...


2
John G Lert Jr, Daozheng Lu: Broadcast program identification method and apparatus. A C Nielsen Company, Mason Kolehmainen Rathburn & Wyss, June 30, 1987: US04677466 (608 worldwide citation)

A method and apparatus for identifying repetitively broadcast programs, such as commercial advertisements broadcast on television and radio, detects the occurrence of predetermined events in a video signal and/or in an audio signal, detects a stability condition and extracts a signature from the vid ...


3
David A Kiewit, Daozheng Lu: Methods and apparatus for automatically identifying programs viewed or recorded. A C Nielsen Company, Mason Kolehmainen Rathburn & Wyss, September 29, 1987: US04697209 (466 worldwide citation)

A method and apparatus for identifying programs such as television programs received from various sources detects the occurrence of predetermined events such as scene changes in a video signal and extracts a signature from the video signal. The signatures and the times of occurrence of the signature ...


4
Jean P DeJean, Daozheng Lu, Robert Weissman: Spread spectrum digital data transmission over TV video. A C Nielsen Company, Marshall O Toole Gerstein Murray & Borun, September 7, 1993: US05243423 (292 worldwide citation)

A co-channel communication system allows transmission of one or more data signals in an active or visible portion of a video raster in a manner that is imperceptible to a viewer. More particularly, the data signal is transmitted over a preselected active video lines of a video raster. In order to re ...


5
Daozheng Lu, Ceril T Shagrin, William L Thomas, Morris Lee, Bruce Bernard, Jia Zhang: Audience measurement system and method. Nielsen Media Research, Marshall O Toole Gerstein Murray & Borun, June 23, 1998: US05771307 (285 worldwide citation)

In a passive identification apparatus for identifying a predetermined individual member of a television viewing audience in a monitored viewing area, a video image of a monitored viewing area is captured. A template matching score is provided for an object in the video image. A Eigenface recognition ...


6
Daozheng Lu, Simon W Lu: Identification card verification system. Daozheng Lu, Simon W Lu, David Kiewit, July 11, 1995: US05432864 (257 worldwide citation)

The present invention provides apparatus and method for verifying the identity of a person by comparing that person's face (or selected facial features) with an image generated using data stored on an identification card, badge, tag or other escort memory carried by the person. Both automatic and ma ...


7
Daozheng Lu, Ceril T Shagrin, William L Thomas, Morris Lee, Bruce Bernard, Jia Zhang: Audience measurement system and method. A C Nielsen Company, Marshall O Toole Gerstein Murray & Borum, August 27, 1996: US05550928 (254 worldwide citation)

In a passive identification apparatus for identifying a predetermined individual member of a television viewing audience in a monitored viewing area, a video image of a monitored viewing area is captured. A template matching score is provided for an object in the video image. A Eigenface recognition ...


8
Daozheng Lu, David A Kiewit, Jia Zhang: Market research method and system for collecting retail store and shopper market research data. A C Nielsen Company, Marshall O Toole Gerstein Murray & Borun, July 19, 1994: US05331544 (239 worldwide citation)

A market research system and method are provided. A plurality of cooperating establishments are included in a market research test area. Each cooperating establishment is adapted for collecting and storing market research data. A computer system remotely located from the plurality of cooperating est ...


9
Daozheng Lu: Image recognition audience measurement system and method. A C Nielsen Company, Mason Kolehmainen Rathburn & Wyss, August 15, 1989: US04858000 (215 worldwide citation)

An image recognition method and system are provided for identifying predetermined individual members of a viewing audience in a monitored area. A pattern image signature is stored corresponding to each predetermined individual member of the viewing audience to be identified. An audience scanner incl ...


10
Donald Wadia Moses, Daozheng Lu: Simultaneous transmission of ancillary and audio signals by means of perceptual coding. Donald W Moses, Nielsen Media Research, Haynes & Boone L, March 7, 2000: US06035177 (198 worldwide citation)

A communication system for simultaneously transmitting ancillary codes and audio signals via a conventional audio communications channel using perceptual coding techniques is disclosed. An encoder monitors an audio channel to detect "opportunities" to insert an ancillary code such that the inserted ...



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