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 (677 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 (646 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 (510 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
Donald E Haselwood, Carl M Solar: Automatic monitor for programs broadcast. A C Nielsen Company, May 24, 1977: US04025851 (390 worldwide citation)

A system for automatically monitoring the programs broadcast by network affiliated broadcasting stations includes a plurality of remote monitoring sites and a central office for periodically interrogating the remote monitoring sites. Each remote monitoring site contains apparatus for monitoring time ...


5
James N Daniel Jr, Thomas F Busyn, Brent T Batterman: Marketing research system and method for obtaining retail data on a real time basis. A C Nielsen Company, Mason Kolehmainen Rathburn & Wyss, November 20, 1990: US04972504 (309 worldwide citation)

A market research retail sales data collection system and method includes a plurality of cooperating retail stores, each having an in-store device for automatically collecting processing and storing market research data in a substantially totally passive or non-invasive manner with respect to the on ...


6
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 (296 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 ...


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 (274 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
Jerry W Bohn: System for substituting television programs transmitted via telephone lines. A C Nielsen Company, Mason Kolehmainen Rathburn & Wyss, December 19, 1989: US04888638 (253 worldwide citation)

A market research system is shown for substituting stored television programs for regularly scheduled, broadcast television programs having a particular identification code wherein the substitute television programs may be transmitted via telephone lines to the households of cooperating panelists fo ...


9
David A Kiewit: Method and apparatus for determining channel reception of a receiver. A C Nielsen Company, Mason Kolehmainen Rathburn & Wyss, October 24, 1989: US04876736 (251 worldwide citation)

A method and apparatus are provided for determining the channel of a plurality of predetermined channels to which a remotely controlled receiver is tuned. A first transmitter device includes a keyboard for receiving viewer entered selections and transmits infrared or ultrasonic control signals for e ...


10
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 (250 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 ...