Patent application number | Description | Published |
20110077865 | FALL DETECTION SYSTEM - There is provided a fall detection system, comprising a passive vibration sensor; one or more other sensors for detecting respective characteristics of a fall; and a processor for analyzing measurements from the one or more other sensors to determine if a fall has occurred; wherein the system is configured to selectively provide power to the one or more other sensors and/or processor in response to the passive vibration sensor detecting motion of a user of the fall detection system. | 03-31-2011 |
20130138395 | METHOD FOR DETECTING FALLS AND A FALL DETECTOR - A method for detecting a fall by a user is provided that comprises a method of detecting a fall by a user, the method comprising processing measurements obtained from one or more sensors to extract a respective value for a plurality of features associated with a fall; determining a respective log likelihood ratio for each of said values; and determining whether the user has fallen based on the determined log likelihood ratios. | 05-30-2013 |
20130202310 | Modulation for coded light transmission - Coded light has been proposed to enable advanced control of light sources and transmit information using light sources. Sequences of channel symbols to drive the light source are determined from sequences of source symbols such that no visible flicker is present in coded light emitted by the light sources. Each source symbol is mapped to a composite channel symbol comprising at least one first channel symbol which may be identical to the current source symbol and at least one second channel symbol which may be a function of the current source symbol and at least one future and/or past source symbol. | 08-08-2013 |
20140112116 | RECORD CARRIER AND APPARATUS FOR SCANNING THE RECORD CARRIER - A record carrier has a servo track indicating an information track intended for recording information blocks. The servo track has a variation of a physical parameter, referred to as wobble. The wobble is modulated for encoding record carrier information, such as addresses. The servo track is subdivided in modulated parts in which the frequency and/or phase of the variation deviates from the wobble frequency, and non-modulated parts. The slope of the wobble is substantially continuous at transitions between the modulated and non-modulated parts by using wobbles starting at the maxima or minima of the wobble in a first part of the modulated parts. | 04-24-2014 |
20140142460 | METHOD FOR DETECTING POTENTIAL FALLS AND A FALL DETECTOR - There is provided a fall detector for detecting a potential fall by a user, the fall detector comprising a sensor for measuring the skin conductivity of the user; and a processor for analyzing the skin conductivity measurements to determine whether the user has had a potential fall, wherein the processor is configured to analyze the skin conductivity measurements by matching the skin conductivity measurements to a predetermined skin conductivity response corresponding to a stressful event. | 05-22-2014 |
20140375217 | VISIBLE LIGHT COMMUNICATIONS USING A REMOTE CONTROL - According to one aspect of the disclosure, a lighting system comprises a remote control unit ( | 12-25-2014 |
Patent application number | Description | Published |
20080263360 | Generating and matching hashes of multimedia content - Hashes are short summaries or signatures of data files which can be used to identify the file. Hashing multimedia content (audio, video, images) is difficult because the hash of original content and processed (e.g. compressed) content may differ significantly. The disclosed method generates robust hashes for multimedia content, for example, audio clips. The audio clip is divided ( | 10-23-2008 |
20080292017 | Modulation of Data Streams With Constellation Subset Mapping - In a method for encoding at least two data streams (p | 11-27-2008 |
20080310532 | Method for Signal Reception - In an OFDM mobile communications system, an algorithm for forming a preliminary estimate of the channel on pilot subcarriers is carried out. Based on this preliminary estimate, a channel property is estimated. This channel property is then used to decide whether to enter a mobile receiver mode or a stationary receiver mode. For example, in the mobile mode channel estimation is performed using only pilot symbols from the current symbol period, while in the static mode channel estimation is performed using pilot symbols from the current symbol period and pilot symbols from other symbol periods. | 12-18-2008 |
20090067519 | ESTIMATION OF LENGTH OF CHANNEL IMPULSE RESPONSE - In a receiver for processing OFDM encoded signals, wherein the OFDM encoded digital signals are transmitted by means of a symbol in each of subcarrier frequency channels, with at least some of said subcarriers containing user data symbols, an initial estimate of a channel frequency response is formed from magnitudes of user data symbols received in those subcarriers. Then, a correlation function of a channel impulse response is estimated by performing an inverse Fourier transform on the initial estimate of the channel frequency response, and the length of the channel impulse response is estimated by examining peaks in the estimated correlation function of the channel impulse response. | 03-12-2009 |
20090276635 | CONTROLLING DISTRIBUTION AND USE OF DIGITAL WORKS - In order to efficiently prevent the save-and-restore attack on usage rights associated with digital work, these usage rights are protected by a hidden channel. In order to make it a difficult or expensive to manipulate the hidden channel, a device is proposed comprising: writing means ( | 11-05-2009 |
20100188004 | DRIVING A LIGHT SOURCE - A method for driving a light source ( | 07-29-2010 |
20120161969 | CONSCIOUSNESS MONITORING - A method for automatically monitoring consciousness of a person and triggering an alarm if the monitored person is not in a state of full consciousness is provided. The method comprises the steps: monitoring at least one aspect of the behavior of the person (S | 06-28-2012 |
20120232823 | METHOD FOR ESTIMATING VELOCITIES AND/OR DISPLACEMENTS FROM ACCELEROMETER MEASUREMENT SAMPLES - There is provided a fall detector for use in detecting falls by a user, the fall detector comprising an accelerometer for producing a time series of measurement samples representing the acceleration acting on the fall detector; a processor for estimating a vertical velocity and/or vertical displacement of the fall detector from the measurement samples and using the estimated vertical velocity and/or vertical displacement to determine whether the user has suffered a fall; wherein the processor is configured to estimate a vertical velocity and/or vertical displacement of the fall detector from the measurement samples by estimating a corresponding time series of unit vectors representing acceleration due to gravity in the reference frame of the accelerometer from the time series of measurement samples; projecting each measurement sample onto the corresponding unit vector and subtracting acceleration due to gravity to give a series of estimates for the vertical acceleration of the fall detector; and integrating the series of estimates for the vertical acceleration over a time period to give a time series of values for the vertical velocity and/or vertical displacement of the fall detector. | 09-13-2012 |