Intrasonics S.a.r.l.

Underground Imaging Technologies, Inc.

Intrasonics Limited

Iti Scotland Limited

Peter John Kelly

Michael Raymond Reynolds

Ross Jones

David Bartlett

Aled Wynne Jones

Ian Michael Hosking

Daniel Reginald Ewart Timson

Robert John Morland

Alan Michael Hart

Nicolas Vasilopolous

Donald Glenn Guy

David John Barrott

Jerome Schalkwijk

Peter Haywood

Stephen Starkie

Nedeljko Cvejic

Paul Christopher Roberts

David Hanson

Keith Sjostrom

Mark Wilds

Michael David Emmens

Christopher John Joseph Sutton

Dan Timson

Scott Hommel

David Alexander Butler

Michael Reymond Reynolds

Daniel R E Timson

John Rye

An audio matching technique generates audio fingerprints from a captured audio signal. Coarse and Fine fingerprints are generated from the captured audio. The coarse fingerprint is used to match with a set of coarse fingerprints stored in a database to identify a subset of possibly matching database entries. The fine fingerprint is then used to perform a detailed comparison with fine fingerprints associated with the subset of possibly matching database entries in order to find a match for the captured audio signal.

Audio matching

A communications system distributes code word pairs within the audio of a television or radio program or the like. Each pair of code words includes an ID code word that is the same for a given program and a synchronization code word that is unique within the program. A portable user device is able to synchronize itself to the program using the embedded synchronization code words.

Media synchronisation system

A user interface includes a display for displaying of a plurality of sensor data sets representative of signals associated with a plurality of sensors configured for sensing of a subsurface. At least some of the sensors are configured for subsurface sensing in a manner differing from other sensors of the plurality of sensors. Each of the sensor data sets comprises sensor data samples each associated with geographic position data. The sensor data sets are shown overlaid within a volume depicted on the display. The graphical representations of the sensor data sets are individually viewable within the volume and displayed in geographical alignment relative to one another within the volume in accordance with the geographic position data of the sensor data samples of each of the sensor data sets.

System and method for visualizing multiple-sensor subsurface imaging data

A movable platform has a front end, a back end, a longitudinal axis, and at least one axle oriented generally transverse to the longitudinal axis and located between the front and back ends for supporting wheels of the platform. A position sensor is affixed on the platform at a location other than at a location defined by a plane passing through the axle and normal to the longitudinal axis. The position sensor provides position data as the platform traverses a path. A sensor arrangement is supported by the platform and configured to provide subsurface sensor data as the platform traverses the path. A processor is configured to associate the position data with the sensor data relative to a reference frame and in a manner that accounts for dynamic motion of the platform.

Sensor cart positioning system and method

A security tag comprising at least one overt data carrier (), and at least one covert data carrier (), the covert data carrier comprising a ring () that is formed around the overt data carrier (). The covert data carrier () is invisible to the unaided eye when lit with visible light, but visible when illuminated with other light, for example UV light.

Secure authentication feature

A data hiding system is described for hiding data within an audio signal. The system can be used for watermarking, data communications, audience surveying etc. The system hides data in an audio signal by adding artificial echoes whose polarity varies with the data to be hidden. In one embodiment, each data value is represented by a positive and a negative echo having different delays. A receiver can then remove the effects of natural echoes and/or periodicities in the audio signal by differencing measurements obtained at the different delays.

Data embedding system

A captioning system is provided for providing captions for audio and/or video presentations. The captioning system can be used to provide text captions or audio descriptions of a video presentation. A user device is provided for the captioning system having a receiver operable to receive the captions together with synchronization information and a caption output circuit which is operable to output the captions at the appropriate timings defined by the synchronization information. The user device is preferably a portable hand-held device such as a mobile telephone, PDA or the like.

Captioning system

There is described a communication system in which data is received by and/or transmitted to a telecommunications apparatus using an acoustic data channel. In embodiments, the data is encoded within the audio track of a media broadcast or other public broadcast. The invention has particular, but not exclusive, relevance to a cellular communication system. There are also described acoustic position detection systems for determining the position of a telecommunications apparatus.

Communication system

Communication system for receiving and transmitting data using an acoustic data channel

A signalling system is provided which can be used to update the prices of goods which are electronically displayed on supermarket shelves (). The signalling system comprises a first signalling device having an input terminal for receiving electrical message data received from a central computer system (), a spread spectrum encoder for encoding the received message data and an electroacoustic converter () for converting the encoded data into corresponding acoustic signals and for transmitting the acoustic signals into a transmission medium. The signalling system also comprises a second signalling device () having means for receiving acoustic signals from said transmission medium and for converting the received acoustic signals into corresponding electrical signals, a spread spectrum decoder for decoding the received signals and a message regenerator for regenerating the message data transmitted by the first signalling device from the signals output by the decoder.

Acoustic communication system

There is described a number of encoders for encoding a data signal within an audio signal. In some of the encoders, the audio signal is separated into a tonal part and a residual part, and the data signal is shaped based on the residual part. In other encoders, the data signal is separated into a tonal part and a residual part, and the data signal is combined with the audio signal independence upon the residual part. In other encoders, the rate at which the data is encoded within the audio signal is varied in dependence upon the audio signal. There are also described various decoders associated with the described encoders.

System and method for shaping a data signal for embedding within an audio signal

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Cambridge, United Kingdom

Peter John Kelly