TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

The critical difference between the frequency limits of a band containing the useful frequency components of a signal.  3, record 1, English, - critical%20bandwidth

Record number: 1, Textual support number: 1 CONT

The notion of critical bands, introduced by Fletcher(1940), explains the masking of a narrow band(sinusoidal) signal by a wideband noise source... One can think of a critical band as a frequency selective "channel" of psychoacoustic processing; only noise falling within the critical bandwidth can contribute to the masking of a narrow band signal. The mammalian auditory system consists of a whole series of critical bands, each filtering out a specific portion of the audio spectrum.  4, record 1, English, - critical%20bandwidth

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

bande critique : Bande de fréquences la plus large au-delà de laquelle certaines caractéristiques de l'audition ne sont plus modifiées (par exemple effet de masque) alors que d'autres sont modifiées (sonie augmentant avec la largeur de bande quand on maintient constante l'intensité acoustique). [Terme et définition normalisés par l'AFNOR et reproduits avec son autorisation.]  3, record 1, French, - bande%20critique

Record number: 1, Textual support number: 1 OBS

Le terme «groupe de fréquences» est parfois utilisé pour désigner la bande critique. [Justification reproduite avec l'autorisation de l'AFNOR.]  3, record 1, French, - bande%20critique

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Noise Suppression Filter. The patent describes a simple and inexpensive device for filtering undesirable high frequency noise from analog data outputs of a data processing system, which operates in two different modes and switches automatically from one to the other depending on the rate of change of data functions and on data transient amplitude with respect to full scale.  1, record 2, English, - noise%20suppression%20filter

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

L'invention concerne un filtre antiparasites à particules permettant de supprimer du bruit non souhaité par augmentation de la résistance spécifique de la ferrite MnZn et l'amélioration d'une caractéristique haute fréquence.  1, record 2, French, - filtre%20antiparasites

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

[A filter used] to remove random noise while preserving high frequency features (edges).  3, record 3, English, - gamma%20filter

Record number: 3, Textual support number: 1 CONT

The Gamma filter performs gamma map filtering. Gamma filtering is primarily used on radar data to remove high frequency noise(speckle) while preserving high frequency features(edges). The Gamma Map filter was first proposed by Kuan.... Lopes modified the Kuan Map filter by assuming a gamma distributed scene and setting up two thresholds. The gamma filter size ranges from 1 to 11. Different filter sizes will greatly affect the quality of processed images. If the filter is too small, the noise filtering algorithm is not effective. If the filter is too large, subtle details of the image will be lost in the filtering process. A 7x7 filter usually gives the best results.... The GAMMA filter performs spatial filtering on each individual pixel in an image using the grey level values in a square window surrounding each pixel. The dimensions of the filter must be odd, and can be from 3x3 to 11x11 pixels.  2, record 3, English, - gamma%20filter

Record number: 3, Textual support number: 2 CONT

Gamma Filter yields the best smoothing and despeckling. Moreover, it seems to keep the edges without blurring the minimum. Eight textures are applied, based on the cooccurrence matrix. These textures include mean, variance, homogeneity, contrast, dissimilarity, entropy, second moment, and correlation.  4, record 3, English, - gamma%20filter

Record number: 3, Textual support number: 1 OBS

The term MAP stands for Maximum A Posteriori.  5, record 3, English, - gamma%20filter

Record number: 3, Textual support number: 2 OBS

gamma filter: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).  5, record 3, English, - gamma%20filter

Record number: 3, Textual support number: 1 PHR

Gamma-gaussian, gamma-beta, gamma-gamma MAP filter.  5, record 3, English, - gamma%20filter

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Filtre utilisé pour enlever les bruits aléatoires des images, tout en préservant les caractéristiques les plus pertinentes (bordures).  2, record 3, French, - filtre%20gamma

Record number: 3, Textual support number: 1 OBS

Pour le lissage et le déchatoiement des images, ce filtre surclasse tous les autres filtres.  2, record 3, French, - filtre%20gamma

Record number: 3, Textual support number: 2 OBS

filtre gamma : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).  2, record 3, French, - filtre%20gamma

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The creation of narrow satellite beams permits not only the effective use of satellite power, but also allows the reuse of the frequency band and provides a means of overcoming the self-interference limit in CDMA.... Today's mobile satellites have onboard processors which connect an uplink band to a downlink beam. Processors use A/D conversion and digital filtering. The A/D converters quantize the signal and produce quantisation noise. The combined signal to quantization noise ratio is(N/C) q=(L2-1)/p2pa.  2, record 4, English, - signal%2Dto%2Dquantization%20noise

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

The airborne receiver model assumed in partitioning the MLS error budgets. [Definition officially approved by ICAO.]  1, record 5, English, - standard%20receiver

Record number: 5, Textual support number: 1 OBS

The salient characteristics are : 1) signal processing based on the measurement of beam centres; 2) negligible centring error; 3) control motion noise(CMN)... 4) a 26 kHz bandwidth 2-pole low pass beam envelope filter; and 5) angle data output filtering by a single pole, low pass filter with a corner frequency of 10 radians per second.  1, record 5, English, - standard%20receiver

Record number: 5, Textual support number: 2 OBS

standard receiver: term officially approved by the International Civil Aviation Organization (ICAO).  2, record 5, English, - standard%20receiver

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Modèle de récepteur embarqué servant à la ventilation des erreurs MLS. [Définition uniformisée par l'OACI.]  1, record 5, French, - r%C3%A9cepteur%20normalis%C3%A9

Record number: 5, Textual support number: 1 OBS

Ce récepteur possède les principales caractéristiques suivantes : 1) traitement du signal basé sur la mesure des centres de faisceau; 2) erreur de centrage négligeable; 3) bruit sur les commandes (CMN) [...] 4) filtre passe-bas à deux pôles d'enveloppe de faisceau ayant 26 kHz de largeur de bande; et 5) filtrage des sorties de données d'angle à l'aide d'un filtre passe-bas à un pôle ayant une pulsation de coupure de 10 radians par seconde.  1, record 5, French, - r%C3%A9cepteur%20normalis%C3%A9

Record number: 5, Textual support number: 2 OBS

récepteur normalisé : terme uniformisé par l'Organisation de l'aviation civile internationale (OACI).  2, record 5, French, - r%C3%A9cepteur%20normalis%C3%A9

Record 5,  Textual support,  Spanish

Record number: 5, Textual support number: 1 DEF

Modelo de receptor de a bordo basado en la división de los presupuestos de errores MLS. [Definición aceptada oficialmente por la OACI.]  1, record 5, Spanish, - receptor%20normalizado

Record number: 5, Textual support number: 1 OBS

Las características más notables son: 1) tratamiento de la señal basado en la medida de los centros de haz; 2) error de centrad despreciable; 3) error de ruido de mandos (CMN) [...] 4) filtro de envoltura de haz, de paso bajo, bipolar y 26 kHz de anchura de banda; y 5) filtrado de la salida de datos de ángulo con un filtro de paso bajo, monopolar, con una frecuencia de vértice de 10 rad/s [radianes por segundo].  1, record 5, Spanish, - receptor%20normalizado

Record number: 5, Textual support number: 2 OBS

receptor normalizado: término aceptado oficialmente por la Organización de Aviación Civil Internacional (OACI).  2, record 5, Spanish, - receptor%20normalizado

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 OBS

The SCIS workstation is "TEMPEST" approved; which is protected by a combination of radio frequency, shielded enclosure and powerline filtering for processing or storing classified information.  1, record 6, English, - powerline%20filtering

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

The act of removing or filtering out movements that repeat themselves with roughly the same frequency.  1, record 7, English, - filtering

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Suppression des mouvements qui se répètent avec approximativement la même fréquence.  1, record 7, French, - filtrage

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

The Patriot multi-function phased-array radar is housed in an air-conditioned, electrically screened, unmanned shelter mounted on an M860 semi-trailed towed by a tractor.... Returning r. f. energy is focused by the antenna lens on to the receiver horn in the comparator. The comparator forms sum and difference signals for the individual monopulse reception channels, the sum, azimuth-difference and elevation-difference signals being routed to the receiver input. After frequency conversion and filtering, the received energy is fed via flexible shielded cable as an intermediate-frequency signal to the receiver group inside the shelter.  1, record 8, English, - azimuth%2Ddifference%20signal

Record 8,  Textual support,  French

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 OBS

The carrier frequency itself is removed by filtering and is replaced by a steady pilot carrier at a typical level of 28dB below the peak side-band power.  1, record 9, English, - steady%20pilot%20carrier

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 OBS

La fréquence porteuse elle-même est supprimée par filtrage et remplacée par une porteuse pilote d'amplitude constante, à un niveau de 18dB au-dessous de la puissance de crête des bandes latérales.  1, record 9, French, - porteuse%20pilote%20d%27amplitude%20constante

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 CONT

(...), the MTD [Moving Target Detection] principle involves dividing up the entire radar coverage area into small range-azimuth cells-(...) called ’coherent processing intervals’(CPI). Eight pulses generated at a constant repetition frequency are assigned to each cell, and each return is subjected to Doppler filtering over a range of velocity values. The particular feature of MTD is its ability to measure the density of clutter and to detect the sudden presence of an additional element-such as an aircraft moving into a particular cell-even though it may have zero relative velocity on account of its tangential track.  1, record 10, English, - coherent%20processing%20interval

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 CONT

Le principe du MTD [Moving Target Detection] est de diviser la zone couverte par le radar en secteurs définis en distance et en azimut (...) et appelés «intervalles de traitement cohérent» (ITC). A chaque secteur sont affectées huit impulsions émises selon une fréquence de répétition constante et chaque écho est soumis à un filtrage Doppler couvrant toute une gamme de vitesses. La caractéristique essentielle du MTD est son aptitude à mesurer la densité des échos parasites et à y détecter la présence soudaine de tout élément nouveau - tel qu'un aéronef entrant dans un secteur donné - même si sa vitesse relative est nulle du fait que sa trajectoire est tangentielle.  1, record 10, French, - intervalle%20de%20traitement%20coh%C3%A9rent

Record 10,  Textual support,  Spanish