708 results about "Signal transformation" patented technology

A method of measuring Photoplethysmography (PPG) signals may comprise detecting dual wavelength illumination from a light detector so as to provide detected signals, converting the detected signals into digital signals so as to provide digital signals, reducing noises from the digital signals and increasing independency between the digital signals so as to provide preprocessed signals, subtracting the average value from the preprocessed signals so as to provide adjusted signals, obtaining whitening matrix based on covariance, eigen value, and eigen matrix obtained from the adjusted signals, and restoring data using the whitening matrix.

Respiratory-based biofeedback devices, systems, and methods are provided. A respiratory biofeedback method includes producing a respiratory signal in response to a user's respiratory activity, generating an audio output signal that includes a modified version of the respiratory signal, and converting the audio output signal into sound waves output to the user to provide biofeedback. The sound waves can be output to the user in real time response to the user's respiratory activity. A microphone can be used to generate the respiratory signal. The generated audio output signal can includes the respiratory signal modified to increase a volume level of a portion of the respiratory signal where the volume level exceeds a specified volume level.

A method for transforming three color-input signals (R, G, B) corresponding to three gamut-defining color primaries of a display to four color-output signals (R′, G′, B′, W) corresponding to the gamut-defining color primaries and one additional primary of the display, where the additional primary has color that varies with drive level, comprising: a) determining a relationship between drive level of the additional primary and intensities of the three gamut-defining primaries which together produce equivalent color over a range of drive levels for the additional primary; and b) employing the three color-input signals R, G, B and the relationship defined in a) to determine a value for W of the four color-output signals, and modification values to be applied to one or more of the R, G, B components of the three color-input signals to form the R′, G′, B′ values of the four color-output signals.

Using at least one MIMO-capable transceiver allows weighting calculations for signals transmitted and received, and enables individual packets to adapt, in a scalable, flexible, and responsive fashion to the real-world dynamics of a continuously varying communications network environment. The method and system of this invention use adaptively-derived diversity means to rapidly and efficiently distinguish the desired signal from noise, network interference, and external interference impinging on the network's transceivers and can transmit with lessened overhead. ADC operations and signal transformations continuously update combiner weights to match dynamically-varying environmental and traffic conditions, thereby continuously matching necessitated signal and waveform transformations with environmental and signal effects and sources. Successive iterations of the adaptation algorithm let each node's multiport combiner and distribution weights approach the MIMO channel's Shannon capacity in high-rate networks, or to minimize power needed to close links at a specified rate in low-rate networks, e.g. Voice-Over-IP networks.

A satellite effective load management system and management method, the system comprises a load distributor, a storage module, a signal transformation processing module, a data multiple connection module and a center processor module, the modularization, integration, standardization effective load management system design conception provided by the invention integrates the data transmission, telemetering measurement remote control, power supply management to be centralized, meanwhile the standard, configurable effective load interface can be designed, so that the resource configuration and the interface configuration of the system are fixed and uniformed, the matching performance problem of effective load managing each task can be effectively solved, the good software and hardware platforms can be provided for time sequence, information and safety management of effective load management, thereby improving the effective load management design level and reducing the complicated degree, corresponding weight and power consumption and so on of the effective load management system, certain basis can be established for improving the whole star performance.

The invention relates to an intelligent insomnia therapeutic instrument, aiming at providing a therapeutic instrument which can induce and regulate potential action of the sleep center of a patient so as to accelerate the falling asleep speed of the patient and improve the sleep quality or realize a natural timing awaking function. The technical proposal is as follows: the instrument comprises a signal output module generating time varying magnetic fields, a bipolar electrode brain wave acquiring module acquiring real-time brain waves of the patient and a main controller obtaining the brain waves and carrying out down-conversion or up-conversion, wherein the signal output module converts digital brain signals output by the main controller into analogue signals which are amplified so as to drive a magnetic field generator to generate time varying magnetic fields used for treating.

In various embodiments, a dynamic range converter includes a first color space converter to convert a source color space of a source video having a source dynamic range to nonlinear color space signals. A linearizer configured converts the nonlinear color space signals to linearized color space signals having a mastering dynamic range via a piecewise linear interpolation of a transfer function. A color volume transformer applies dynamic color transform metadata associated with the source video to generate master adjusted color space signals from the linearized color space signals. A delinearizer converts the master adjusted color space signals to nonlinearized color space signals via a piecewise linear interpolation of an inverse transfer function in accordance with a display dynamic range. A second color space converter converts the nonlinearized color space signals to display domain signals. Other embodiments are disclosed.

Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. An improved method for encoding pre-processed audio data comprises encoding the pre-processed audio data, and encoding auxiliary data that indicate the particular audio pre-processing. An improved method for decoding encoded audio data comprises determining that the encoded audio data had been pre-processed before encoding, decoding the audio data, extracting from received data information about the pre-processing, and post-processing the decoded audio data according to the extracted pre-processing information.

Methods, sensors, and systems for determining a concentration of glucose in a medium of a living animal are disclosed. Determining the glucose concentration may involve emitting excitation light from a light source to indicator molecules, generating a raw signal indicative of the amount of light received by a photodetector, purifying and normalizing the raw signal, and converting the normalized signal to a glucose concentration. The purification may involve removing noise (e.g., offset and/or distortion) from the raw signal. The purification and normalization may involve tracking the cumulative emission time that the light source has emitted the excitation light and tracking the implant time that has elapsed since the optical sensor was implanted. The purification and normalization may involve measuring the temperature of the sensor. The purification, normalization, and conversion may involve using parameters determined during manufacturing, in vitro testing, and/or in vivo testing.

A system for controlling a body part includes a number of sensing devices that sense signals from a hemisphere of a brain. A signal translating unit translates the signals into a command signal for controlling the body part, which is on a same side of the body as the hemisphere of the brain. A prosthetic device receives the command signal from the signal translating unit and manipulates the body part in response to the command signal.

A method compresses a set of correlated signals by first converting each signal to a sequence of integers, which are further organized as a set of bit-planes. This can be done by signal transformation and quantization. An inverse accumulator is applied to each bit-plane to produce a bit-plane of shifted bits, which are permuted according to a predetermined permutation to produce bit-planes of permuted bits. Each bit-plane of permuted bits is partitioned into a set of blocks of bits. Syndrome bits are generated for each block of bits according to a rate-adaptive base code. Subsequently, the syndrome bits can be decompressed in a decoder to recover the original correlated signals. For each bit-plane of the corresponding signal, a bit probability estimate is generated. Then, the bit-plane is reconstructed using the syndrome bits and the bit probability estimate. The sequence of integers corresponding to all of the bit-planes can then be reconstructed from the bit probability estimates, and the original signal can be recovered from the sequences of integers using an inverse quantization and inverse transform.

The invention discloses a locomotive semi-physical simulation device, system and method. The device comprises a real-time simulation unit, a computer and an electrical signal conversion unit. The computer converts a control instruction for simulating an upper-layer network control system into a bus communication protocol, and then sends the bus communication protocol to a communication conversion unit of the electrical signal conversion unit. The communication conversion unit sends the control instruction to an external physical controller, the physical controller outputs a control signal to a controlled object model according to the control instruction, the control signal is sent to a real-time simulation unit via the electrical signal conversion unit, the real-time simulation unit calculates a output result of a state signal of the controlled object model according to the control signal, the output result is sent to the physical controller via the electrical signal conversion unit, and the physical controller sends the state signal of the controlled object model back to the computer via the communication conversion unit. The technical problems that simulation integrity and precision of an existing system are not high, function verification cannot be accurately performed, the modification period is long, and efficiency and performability are low are solved.

A physiological monitor device (10) has physiological detection means, signal transducer means, control and calculating means as well as a display (15). The detection means has an inflatable cuff (12) with a pressure detection for blood pressure and an ECG electrode secured to the cuff. The cuff fits about the wrist of the user with the control, calculating and display included in a module (11) attached to the cuff.

Systems, methods and apparatuses are provided for allowing a user to supervise personal exposure to a program exhibited by a consumer electronics device, such as, e.g., a television system. The consumer electronics device includes a facial recognition system and media rating enforcement circuitry that analyzes a program signal and either blocks or passes the program signal based on certain content and viewer based criteria and also, in the alternative, time based criteria. In this connection, a user can program the enforcement circuitry with the content and viewer based criteria in the form of one or more viewing profiles comprising viewer specifications and content-based specifications associated with the viewer specifications, and, which specify a rating and/or a subject matter category. The enforcement circuitry receives one or more viewer indicators from a facial recognition system that are indicative of the viewers present in a viewing area and one or more content-based indicators, which are indicative of a rating and/or a subject matter category of the program. The enforcement circuitry compares the viewer indicators with the viewer specifications and then the content-based indicators with the content-based specifications. Based on this comparison, the enforcement circuitry either passes the program signal to an output device for transformation of the program signal into the program or blocks the program signal from being sent to the output device.

Drone-based wireless communications systems are provided, as are methods carried-out by such wireless communications systems. In one embodiment, the wireless communications system includes a Satellite Signal Transformation (SST) unit and a plurality of aerial network drones, which can be deployed over a designated geographical area to form a multi-drone network thereover. During operation, the SST unit transmits a network source signal, which contains content extracted from a satellite signal. The multi-drone network receives the network source signal, disseminates drone relay signals containing the content through the multi-drone network, and broadcastings user device signals containing the content over the designated geographical area. In embodiments, the multi-drone network may broadcast multiple different types of user device signals for reception by various different types of user devices located within the designated geographical area, such as an area containing communication infrastructure disabled by a natural disaster, a hostile attack, or other catastrophic event.

A channel estimation section 112 estimates the states of channels used for pieces of mobile station apparatus (A) and (B), using signals demodulated by radio processing sections 110, 111. A best SIR calculation section 118 calculates coefficients to be used for signal transformation by inverse matrix calculation, using the above channel estimation values by the above channel estimation section 112. A signal transformation section 119 performs linear transformation of transmission signals to the above pieces of mobile station apparatus, using the above coefficients from the above best SIR calculation section 118. Radio processing sections 120, 121 modulates each transmission signal after the above linear transformation for transmission through antennas 108, 109, respectively.

Methods, circuits, and systems for time encoder-based unmixing of hyperspectral imaging data are disclosed. A method of unmixing hyperspectral imaging data includes receiving mixed image data of one or more pixels. The mixed image data is generated by an imaging device that captures hyperspectral data. The mixed image data includes sensed spectral band intensities of materials in an area represented by a particular pixel. The mixed image data is converted from first analog domain signals into pulse domain signals. A solution to a mixing equation in the pulse domain is generated to identify abundances of one or more of the materials based on the sensed spectral band intensities. The sensed spectral band intensities are compared to reference spectral band intensities of a set of considered materials. The solution is converted from a pulse domain into an analog domain as second analog domain signals.

The invention discloses a heat source machine formed by connecting gas water heaters in parallel and a control method. The heat source machine comprises a main water inlet pipe, a hot water convergence pipe, a main gas inlet pipe, gas water heaters and a system controller. The gas water heaters are connected in parallel through the main water inlet pipe, the hot water convergence pipe and the main gas inlet pipe. Each gas water heater is internally provided with a water flow collecting sensor, a water inlet temperature detector and a water outlet temperature detector and is connected with the system controller through a communication bus and a signal converter arranged on the communication bus. A water inlet electromagnetic valve is arranged on a cold water pipe of each gas water heater and connected with the system controller through a water inlet switch control line. During working, data of each gas water heater are transmitted to the system controller, the number of the gas water heaters needing to work is worked out, the system structure is simple, installation is convenient, the water temperature is constant, no constant temperature water tank is needed, and safety is high.

The invention discloses a radio frequency system. According to the invention, a radio frequency remote operation can be carried out without adding external combined equipment. The radio frequency system comprises a filtering unit, a main control unit, and at least two radio frequency units. Each radio frequency unit is respectively connected with the main control unit and the filtering unit. The filtering unit is used for combining and filtering received signals of all radio frequency units and emitting filtered signals together by an antenna; besides, the filtering unit is also used for shunting and filtering received signals by the antenna and sending each received signal to a corresponding radio frequency unit. Each radio frequency unit is used for carrying out an amplifying and filtering process and a down conversion process on received signals from the filtering unit and sending the processed signals to the main control unit; besides, the each radio frequency unit is also used for carrying out modulation, up conversion, and amplification on signals from the main control unit and sending the processed signals to the filtering unit. The main control unit is used for allowing the signal transformation between a BBU and a radio frequency unit.

The invention relates to a hardware in-loop simulation test system for a traffic signal control system, and relates to the technical field of traffic signal control and traffic simulation, for overcoming the defects that a practical signal control system cannot support prior evaluation and traffic simulation software can not simulate a timing scheme of the signal control system in real time. The test system consists of the traffic signal control system, signal conversion equipment and a traffic simulation module, wherein one-to-one or one-to-many data transmission between the signal conversion equipment and a signal machine and between the traffic simulation module and the signal conversion equipment can be realized by wire/wireless connection. The signal conversion equipment can be interface equipment which independently runs, or an input/output card on a main board of a computer, or a universal interface assembled on the signal machine and the computer. The data transmission takes the signal conversion equipment as a bridge, vehicle detecting information is transmitted to the signal machine by the traffic simulation module, and signal timing information is transmitted to the traffic simulation module by a traffic signal controller.

A method and device for reducing the computational complexity of a processing algorithm, of a discrete signal, in particular of the spectral estimation and analysis of bio-signals, with minimum or no quality loss, which comprises steps of (a) choosing a domain, such that transforming the signal to the chosen domain results to an approximately sparse representation, wherein at least part of the output data vector has zero or low magnitude elements; (b) converting the original signal in the domain chosen in step (a) through a mathematical transform consisting of arithmetic operations resulting in a vector of output data; (c) reformulating the processing algorithm of the original signal in the original domain into a modified algorithm consisting of equivalent arithmetic operations in the domain chosen in step (a) to yield the expected result with the expected quality quantified in terms of a suitable application metric; (d) combining the mathematical transform of step (b) and the equivalent mathematical operations introduced in step (c) for obtaining the expected result within the original domain with the expected quality; (e) selecting a threshold value based on the difference in the mean magnitude value of the elements of the output data vector of the transform said in step (b) and the preferred complexity reduction and degree of output quality loss that can be tolerated in the expected result within the target application; (f) pruning a number of elements the magnitude of which is less than the threshold value selected in step (e); and/or eliminating arithmetic operations associated with the pruned elements of step (f) either in the mathematical transform of step (b) and/or in the equivalent algorithm of step (c).