Goods & Services

Counter UAV (Unmanned Aerial Vehicle) system, comprising sensors for the detection of UAVs, electronic apparatus for processing and evaluation of sensor data and jammers for performing electro-magnetic countermeasures against the detected UAVs

Abstract

In an object recognition apparatus or a vehicle equipped with the same, a first target area, for judging whether or not a target object is to be treated as a target of a behavior supporting action, is set as one portion of a first detection region, and a second target area, for judging whether or not the target object is to be treated as the target of the behavior supporting action, is set as one portion of a second detection region. If the position of a first peripheral object such as a radar target exists within the first target area and the position of a second peripheral object such as a camera target exists within the second target area, the target object is treated as the target of the behavior supporting action.

IPC Classes  ?

• G01S 13/86 - Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06K 9/62 - Methods or arrangements for recognition using electronic means
• G01S 13/06 - Systems determining position data of a target
• G01S 7/41 - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisationTarget signatureTarget cross-section
• B60W 30/00 - Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
• B60W 30/08 - Predicting or avoiding probable or impending collision
• G01S 13/93 - Radar or analogous systems, specially adapted for specific applications for anti-collision purposes
• G08G 1/16 - Anti-collision systems

Abstract

A sensor for detecting and localizing laser beam sources, includes a beam-sensitive detector which is arranged in the image field of an imaging optic, an electric image processing device which is connected to the detector, and an optical diffraction element which is arranged in the beam path. The diffraction properties of the optical diffraction element are such that incident laser light on different wavelength bands produce diffraction patterns with different shapes, and the electronic image processing device is designed such that it can detect and evaluate the different forms of the diffraction pattern.

IPC Classes  ?

• H01J 5/16 - Optical or photographic arrangements structurally combined with the vessel
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01S 3/784 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from static detectors or detector systems using a mosaic of detectors
• G01S 7/48 - Details of systems according to groups , , of systems according to group
• G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
• G01J 1/04 - Optical or mechanical part

Abstract

A transceiver element for an active, electronically controlled antenna system includes a transmit path, a receive path and single-pole change-over switches having a common central connection and two connections for switching between the transmit path and the receive path. An amplitude controller and a phase adjuster are arranged between the common center connections of a first and second single-pole change-over switch. Single-pole multiple toggle switches having a common central connection and a number N of connections are present. The common central connection of the first and second single-pole change-over switch is connected to the common central connection of a first and a second single-pole multiple toggle switch respectively, and an amplitude controller and a phase adjuster are connected between each connection of the number N of connections of the first multiple toggle switch and the second multiple toggle switch.

IPC Classes  ?

• H04B 1/44 - Transmit/receive switching
• H04Q 3/28 - Circuit arrangements for first stage of hunting switching for line finders comprising main groups and subgroups
• H01Q 3/34 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means
• H04B 7/12 - Frequency diversity
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H01Q 3/28 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the amplitude
• H01Q 3/38 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters the phase-shifters being digital
• H01Q 21/00 - Antenna arrays or systems

Abstract

A method of kinematic ranging for finding the range R of a jammer moving on a trajectory involves measuring the bearing of the jammer and the rate of change thereof using an airborne detector radar at a first position (24), causing the airborne detector radar to carry out a manoeuvre such that is it displaced in the horizontal plane by a displacement having orthogonal components Δx, Δy, and measuring the bearing of the jammer at a second position subsequent to the manoeuvre. By making an appropriate choice for the components Δx, Δy, the range R may be found with a desired relative range accuracy, and the error in R may be minimized.

IPC Classes  ?

• G01S 7/36 - Means for anti-jamming
• G01S 7/38 - Jamming means, e.g. producing false echoes
• G01S 7/02 - Details of systems according to groups , , of systems according to group
• G01S 11/04 - Systems for determining distance or velocity not using reflection or reradiation using radio waves using angle measurements

Abstract

An optical sensor arrangement includes two sensors arranged one behind the other. The operational spectral ranges of the sensors match, and the first sensor forms an attenuation filter for the second sensor, which is arranged behind the first sensor.

IPC Classes  ?

• G01J 5/02 - Constructional details
• G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
• G01S 7/48 - Details of systems according to groups , , of systems according to group
• F42B 15/01 - Arrangements thereon for guidance or control
• F42C 13/02 - Proximity fuzesFuzes for remote detonation operated by intensity of light or similar radiation
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 7/495 - Counter-measures or counter-counter-measures
• G01J 1/02 - Photometry, e.g. photographic exposure meter Details
• G01J 1/44 - Electric circuits
• G01J 1/04 - Optical or mechanical part
• G01S 3/782 - Systems for determining direction or deviation from predetermined direction

Abstract

A reactive radio interferer includes a plurality of time synchronized transmitting/receiving lines, each of which is designed to alternately carry out-monitoring phases in order to receive the radio spectrum and interference phases in order to transmit an interference signal on the basis of the radio spectrum received in the monitoring phase. Testing of the reactive radio interferer is performed by having one of the transmitting/receiving lines transmit a test signal within a monitoring phase, the test signal being received and evaluated by at least one other transmitting/receiving line.

IPC Classes  ?

• H04B 17/14 - MonitoringTesting of transmitters for calibration of the whole transmission and reception path, e.g. self-test loop-back
• H04B 17/19 - Self-testing arrangements
• H04W 24/08 - Testing using real traffic
• H04B 17/00 - MonitoringTesting
• H04K 3/00 - Jamming of communicationCounter-measures

Abstract

A circuit for frequency-dependent matching of a high-frequency amplifier stage includes high-frequency stage with an output to a total high-frequency path that divides a total frequency band into a plurality of partial frequency paths for respectively preset partial frequency bands. The outputs of the plurality of partial frequency paths are reunited again into the total high-frequency path, following the processing of the partial frequency bands of these partial frequency paths. The partial frequency paths include a matching network surrounded by a first and second pass filter. At least one partial frequency path is switchable, when a control signal is supplied thereto.

IPC Classes  ?

• H03F 3/191 - Tuned amplifiers
• H03F 3/19 - High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
• H03F 1/56 - Modifications of input or output impedances, not otherwise provided for
• H03F 3/193 - High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only with field-effect devices

Abstract

Method for detecting pulsed laser radiation having two-dimensional resolution of the direction of incidence with a CCD sensor having an imaging optic. Method includes generating, in signal processing having sampling frequency of at least 5 kHz, single images by comparing each pixel of CCD sensor to respective threshold values and by storing a pixel value exceeding the respective threshold value for an image processing, ascertaining, in the signal processing, a mean or peak value of stored pixel values of the single image pixel-by-pixel over at least 10 samples, forwarding a signal image obtained in signal processing for image processing at image frequency of 10 Hz to 500 Hz, and identifying from signal image, in an image processing, at least one signal pixel representing incident laser radiation. Method further includes determining direction of incidence of laser radiation from position of signal pixels on signal image.

IPC Classes  ?

• G01C 21/02 - NavigationNavigational instruments not provided for in groups by astronomical means
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• G01S 3/784 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from static detectors or detector systems using a mosaic of detectors
• G01S 7/48 - Details of systems according to groups , , of systems according to group
• G01S 7/486 - Receivers

Abstract

Methods for detecting the flight path of projectiles involve a sequence of N target detections that include detecting the measured velocities and azimuthal angle bearings of the projectile along the flight path of the projectile by Doppler radar at the times tn, wherein n=1 . . . N, and determining the flight path and the direction of motion of the projectile are from these measurements. The measurements are adapted in a first nonlinear parameter fit to an analytical relationship of the time curve of the radial velocity of the projectile while the projectile passes through the detection range of the radar and so that the absolute projectile velocity, minimum distance of the project flight path from the radar, time at which the projectile passes the point having the minimum distance, flight path direction in azimuth, and flight path direction in elevation can be estimated.

IPC Classes  ?

• G01S 13/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
• G01S 13/50 - Systems of measurement based on relative movement of target
• G01S 13/72 - Radar-tracking systemsAnalogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar
• G01S 13/44 - Monopulse radar, i.e. simultaneous lobing

Abstract

An annular slot antenna includes an inner conductor divided by a dielectric gap into a rear section and a front section. An inner conductor of a coaxial feed line is contacted with the front section of the inner conductor and the outer conductor of the coaxial feed line is contacted with the rear section.

IPC Classes  ?

• H01Q 13/10 - Resonant slot antennas
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 13/18 - Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity

Abstract

An ejection device for a flight data recorder includes an ejection spindle, which can be detachably connected to the flight data recorder by means of a bayonet coupling. The bayonet coupling can be released by means of force application by the ejection spindle, a disengaging device, which has a compression-resistant housing and into which the ejection spindle can be screwed, and a gas pressure generator, a valve, which is located within the disengaging device and which permits a flow connection between the outlet of the gas pressure generator and the ejection spindle when the ejection spindle is screwed in and which disables the flow connection between the outlet of the gas pressure generator and the ejection spindle when the ejection spindle is unscrewed.

IPC Classes  ?

• F16B 7/20 - Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections
• B25G 3/16 - Locking or securing devices comprising bayonet joints
• B64D 45/00 - Aircraft indicators or protectors not otherwise provided for
• B64D 25/20 - Releasing of crash-position indicators

Abstract

A device for the radiometric calibration of infra-red measuring devices is provided. The device is in the form of a heated metal surface that is used as a radiant surface and is coated with a high-emission material. The device includes a spherical segment, the interior of which is coated with the high-emission material and the opening of the spherical segment is used as an aperture for an infra-red device that can be arranged in the center of the aperture.

IPC Classes  ?

• G01J 5/02 - Constructional details
• G01J 5/08 - Optical arrangements
• G01J 5/52 - Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer

Abstract

An apparatus for displaying terrain on a display apparatus of an airborne vehicle is provided. The apparatus includes a synthetic vision system having a terrain and obstruction database, an enhanced vision system with sensors for recording terrain data, a height and position sensor for determining the flight state data, a display apparatus, a processor for fusion of the data from the synthetic vision system and from the enhanced vision system. The height information that is produced by the synthetic vision system and the enhanced vision system is stored as pixels in a two-dimensional grid network. The fusion processor uses an error function for insertion of a pixel into the two-dimensional grid network. The error function provides an estimate of the size of the respective cell in which the pixel is stored, from the distance between the pixel and the sensor position.

IPC Classes  ?

• G08B 21/00 - Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for

Abstract

A computer system includes at least two COTS processor cores and an evaluating device connected to the at least two COTS processor cores for evaluating output signals output by means of the at least two COTS processor cores. The evaluating device includes a comparator for pair-wise comparison of the respective generated output signals with each other. The comparator also outputs a comparison signal corresponding to the respective comparison of the output signals.

IPC Classes  ?

• G06F 11/00 - Error detectionError correctionMonitoring
• G06F 11/16 - Error detection or correction of the data by redundancy in hardware
• G06F 11/18 - Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits, e.g. by quadding or by majority decision circuits

Abstract

A stacked microstrip antenna includes two microstrip antenna elements arranged one above the other, and a dielectric separator between the two microstrip antenna elements. The dielectric separator has one or more cavities.

IPC Classes  ?

• H01Q 9/04 - Resonant antennas
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart

Abstract

A shock isolation structure for mounting a radar system to a supporting surface on board of a vessel includes a platform on which the radar system can be attached, six strut-like damping elements operating in both tension and compression between the platform and the supporting surface. The damping elements are oriented in a truss configuration with first ends of the damping elements connected to the supporting surface for universal movement and with second ends of the damping elements connected to the platform for universal movement. Each of the damping elements includes a magnetorheological or electrorheological fluid damper.

IPC Classes  ?

• F16M 13/00 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles
• F16F 9/53 - Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
• F16F 15/027 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means comprising control arrangements

Abstract

An antenna array that includes a plurality of antenna elements and a method of forming an antenna array. The antenna array includes an antenna baseplate on which the plurality of antenna elements are arranged in a regular grid, and a dielectric wide angle impedance match (WAIM) layer structured and arranged in front of the antenna elements to match impedance for large skew angles. The WAIM layer includes a monolithic material layer from which spacers are machined in a regular grid that corresponds to the grid of the antenna elements.

IPC Classes  ?

• H01Q 21/00 - Antenna arrays or systems
• H01P 11/00 - Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 19/02 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic Details

Abstract

A method for direction finding by means of monopulse formation in a radar system with electronically controlled group antenna and analog beam shaping of sum and difference channels, a self-test of the antenna being carried out to identify failed receiving elements, and the result of the self-test going directly into the monopulse formation and the test thereby being error corrected. The result of the self-test is converted into correction values that, independently of the antenna viewing direction, are combined with those from the sum channel signal and the difference channel signals of the antenna.

IPC Classes  ?

• G01S 7/40 - Means for monitoring or calibrating
• G01S 13/44 - Monopulse radar, i.e. simultaneous lobing

Abstract

A foldable log-periodic antenna includes a feed line, one or more transmitting elements for transmitting and/or receiving electromagnetic signals, one or more supporting elements for holding the transmitting elements, and one or more elements for producing a tensile stress on the transmitting elements. One of the a transmitting elements is connected to one of the supporting elements and to the feed line, and with one supporting element is connected to the feed line via an articulated joint apparatus, such that the antenna can be moved from a transport position to an operating position and vice versa. The one or more elements for producing a tensile stress on the transmitting elements is a flexible tube, and can have an internal pressure applied to them and are connected to the supporting elements for holding the transmitting elements.

IPC Classes  ?

• H01Q 11/10 - Log-periodic antennas
• H01Q 1/08 - Means for collapsing antennas or parts thereof

Abstract

A method for producing a sensor-supported, synthetic view for landing support of helicopters under brown-out or white-out conditions is provided. A virtual 3-D representation of the landing zone is continuously created from 3-D data of the intended landing zone recorded during the landing approach and a monitoring routine is available to ensure that no 3-D data that was produced under brown-out or white-out conditions is considered in the representation. As soon as the monitoring routine detects that 3-D data has been recorded under brown-out or white-out conditions, an additional radar sensor is activated to continuously produce distance and/or Doppler data of potential objects entering the landing zone, the objects being displayed to a pilot of the landing helicopter in the synthetic view.

IPC Classes  ?

• G01S 13/00 - Systems using the reflection or reradiation of radio waves, e.g. radar systemsAnalogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
• G01S 13/08 - Systems for measuring distance only

Abstract

A method for detection of wind power installations using a radar installation is provided. The method involves transmitting a number N of predetermined sequences of modulated transmission pulses at a predetermined pulse repetition frequency successively in time and receiving and processing transmission pulses reflected by an object to determine whether the object is a wind power installation.

IPC Classes  ?

• G01S 13/00 - Systems using the reflection or reradiation of radio waves, e.g. radar systemsAnalogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
• G01S 13/524 - Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi
• G01S 13/56 - Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Abstract

A method and a device are provided for specifying, in the context of the image generation of ISAR processing, the determination of the aspect angle course subject to which the radar illuminates the vehicle during the exposure and subject to which the vehicle echoes are reflected back to the radar. Using the distance between the radar sensor and the vehicle as well as the change in distance, both of which are determined from the radar data, the position and the velocity of the vehicle are determined at any time during the exposure through linkage with available road information. The aspect angle is then determined from the positions of the sensor and of the vehicle as well as from the direction of movement of the vehicle. The required road information can be acquired from digital maps or images (e.g. aerial photographs, SAR-images).

IPC Classes  ?

• G01S 13/90 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging using synthetic aperture techniques

Abstract

A method for operating a pulsed interference laser in an eye-safe manner in a DIRCM system onboard an aircraft is provided. A reception apparatus is used to receive echoes from the emitted pulses from the interference laser and to evaluate them to determine whether an object is situated within a prescribed laser safety distance for the DIRCM system in the laser beam. The emission of the laser beam is enabled separately for a respective period of time Δt within the period of use of the interference laser, the emission being enabled for the respective subsequent period of time Δt only if no object has been found within the laser safety distance within the respective preceding period of time Δt.

IPC Classes  ?

• H04B 10/11 - Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
• G01S 17/02 - Systems using the reflection of electromagnetic waves other than radio waves
• G01S 7/495 - Counter-measures or counter-counter-measures

Abstract

The invention relates to a method for generating images having a reduced error rate, high resolution and improved contrast from image sequences containing images having lower resolutions, which can be obtained from an image sensor having adjustable recording parameters. According to the invention, the image sequences of the images (K, R) having low resolutions are subjected to a combination of super-resolution processing (SR) and high dynamic range reconstruction processing (HDR) in order to obtain images having a reduced error rate, high resolution and improved contrast on the basis of redundant and complementary image information contained in the images having low resolution.

IPC Classes  ?

• G06K 9/40 - Noise filtering
• G06K 9/32 - Aligning or centering of the image pick-up or image-field
• G06T 3/40 - Scaling of whole images or parts thereof, e.g. expanding or contracting
• H04N 5/235 - Circuitry for compensating for variation in the brightness of the object
• G06T 5/50 - Image enhancement or restoration using two or more images, e.g. averaging or subtraction

Abstract

Fiber optic scanner and method for transmitting and receiving optical signals and range imaging camera including fiber optic scanner. The fiber optic scanner includes a light guide array including individual light guides arranged such that a first end has first ends of the individual light guides arranged in an image plane of collimating optics and a second end has second ends of the individual light guides arranged in a circular manner. A central light guide includes a first end arranged at a center of the circularly arranged second ends of the individual light guides and a motor driven reflector arranged to guide light emerging from the circularly arranged ends of the individual light guides into the central light guide. The central light guide further includes two coaxially arranged cross sectional areas that are structured and arranged to guide transmitted light through a central one of the two coaxially arranged cross sectional areas and to guide received light through an outer one of the two coaxially arranged cross sectional areas.

IPC Classes  ?

• G01C 3/08 - Use of electric radiation detectors

Abstract

Device, system and method of protecting aircrafts against incoming threats. For example, a system for protecting an aircraft against an incoming threat includes: one or more electro-optic sensors to substantially continuously search for the incoming threat, and to generate a signal indicating that a possible incoming threat is detected; one or more radar sensors to be activated in response to the signal, and to search for the incoming threat; and a central computer to determine whether or not the incoming threat exists, based on a sensor fusion algorithm able to fuse data received from the one or more electro-optic sensors and data received from the one or more radar sensors.

IPC Classes  ?

• G01S 13/86 - Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
• G01S 7/38 - Jamming means, e.g. producing false echoes

Abstract

opt(f) is calculated for a distorted received signal using the following rule: H(f): the Fourier-transform of the pulse compression mismatch filter h(t).

IPC Classes  ?

• G01S 13/00 - Systems using the reflection or reradiation of radio waves, e.g. radar systemsAnalogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
• G01S 7/40 - Means for monitoring or calibrating

Abstract

A man-machine interface for assisting a pilot during takeoff or landing of an airborne vehicle in reduced external visibility includes a display which represents a virtual scenario from the perspective of a virtual observer who is himself located behind the airborne vehicle and is in the same flight attitude as the airborne vehicle itself. The virtual scenario includes a base plane which symbolizes an idealized ground surface, calculated from the instantaneous value of the altitude above ground and the instantaneous flight attitude data of the aircraft. The base plane is bounded by an artificial horizon and is continuously updated with the instantaneous flying state data and the instantaneous height above ground. The virtual scenario also includes a symbol which represents the airborne vehicle, and the position of the symbol relative to the base plane represents the current flight attitude and the instantaneous height of the airborne vehicle above ground.

IPC Classes  ?

• G08B 21/00 - Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for

Abstract

In an IR jamming system for defense against missiles with IR-sensitive homing heads, one or more jamming beams are generated, whose diameter is less than that of the optical aperture of the IR-sensitive homing head of the missile. The optical aperture of the IR-sensitive homing head of the missile is at least partially illuminated by the jamming beam or beams.

IPC Classes  ?

• H04K 3/00 - Jamming of communicationCounter-measures
• G01S 7/38 - Jamming means, e.g. producing false echoes
• G01S 7/00 - Details of systems according to groups , ,
• F41G 7/00 - Direction control systems for self-propelled missiles

Abstract

In an analog signal compression method with digital compression and digital expansion of linear based or sine-based linear signals, a signal coordination point is determined in a bi-adaptive scaleable mV/step and a time/step structured plane. To accomplish this, the linear or sine-based input signal is digitized, the breaks of the digitized linear or sine-based signal are detected, and the time difference and the amplitude difference of two successive breaks of the linear or sine-based signal are determined. This permits time differences and amplitude differences of successive breaks to be value coded as a data word on the basis of adaptive scaleable time-per-step tables and voltage-per-step tables so that the time-per-step tables and the voltage-per-step tables are selected depending on the absolute value of the determined time difference and amplitude difference, thus producing compressed data. An associated expansion method for reconstructing the original analog signal is also disclosed.

IPC Classes  ?

• H04B 1/66 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signalsDetails of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission for improving efficiency of transmission
• H04B 14/04 - Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
• G10L 19/00 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocodersCoding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis