Abstract:
Recordings from microphones that provide 1 st order Ambisonics signals, so-called B-format signals, offer a limited cognition of sound directivity. Sound sources are perceived broader than they actually are, especially for off-center listening positions, and the sound sources are often located to be coming from the closest speaker positions. In a method and apparatus for enhancing the directivity of 1st order Ambisonics signals, additional directivity information (22, 23) is extracted (SFA) from the lower order Ambisonics input signal (10). The additional directivity information is used to estimate higher order Ambisonics coefficients (25a), which are then combined (CS) with the coefficients of the input signal. Thus, the directivity of the Ambisonics signal is enhanced, which leads to an increased accuracy of spatial source localization when the Ambisonics signal is decoded to loud speaker signals. The resulting output signal has more energy than the input signal.
Abstract:
L'invention concerne le traitement numérique de signaux, notamment pour les télécommunications sans fil. Selon l'invention, on propose d'utiliser un module de calcul itératif (MCI) exécutant par une suite d'opérations itératives une transformée de Fourier rapide (FFT) chaque fois qu'une transformée de Fourier doit être effectuée, et d'utiliser ce même module de calcul pour exécuter indirectement une fonction de filtrage à réponse impulsionnelle finie (FIR) en passant par l'intermédiaire du domaine fréquentiel, en considérant que la fonction de filtrage FIR peut être réalisée par une transformée de Fourier suivie d'une multiplication par des coefficients et suivie par une transformée de Fourier inverse. Le module de calcul itératif comprend essentiellement un circuit "papillon" qui exécute quelques additions, soustractions, et multiplications par un coefficient. On peut réaliser avec un même circuit, en limitant l'encombrement, à la fois des FFT et des fonctions FIR.
Abstract:
Multikanalsignale und insbesondere dreidimensionale Signale stellen hohe Anforderungen an zu übertragende oder zu speichernde Datenmengen, die es möglich effizient zu reduzieren gilt. Allgemeine bekannte Vorrichtungen oder Verfahren für eine derartige Datenreduktion sind hier parametrische Verfahren, die räumliche Information beispielsweise anhand der aus dem Stand der Technik bekannten Fast Fourier Transform (FFT) extrahieren und anschließend als permanenten Datenstrom gemeinsam mit einem Mono- oder Stereosignal übertragen. Eine solche Technologie ist insbesondere mit MPEG Surround bekannt, die für ihre Übertragung ein Mono- oder Stereosignal benutzt. Eine direkte Extraktion von Multikanalsignalen anhand von Korrelationsvergleich, welche einerseits für zeitinvariante (stationäre) Signale ihre mathematisch exakte Lösung liefert, und bei zeitvarianten (nichtstationären) Signalen ein spezifisches Residualverhalten aufweist, führt erfindungsgemäß zum unmittelbaren Nachweis eines, allen Residualen zugrundeliegenden, sehr einfach zu bestimmenden Signals. Dieses lässt sich beispielsweise in der Audiokodierung für die effiziente Verminderung von Artefakten bzw. Verfärbungen der Klangfarbe und sonstigen Demaskierungseffekten benutzen - und führt zur effizienten Kodierung von Signalen höchster Ordnung (wie etwa NHK 22.2).
Abstract:
The invention relates to a device for determining in the frequency domain the correlation between a code modulated signal and a replica code sequence in parallel for various relative shifts between the code modulated signal and the replica code sequence. The device comprises a common memory arranged for storing in sequence different intermediate results in determining the correlation. The intermediate results including at least samples resulting at various stages of a time to frequency transform used for transforming samples of the code modulated signal into the frequency domain and samples resulting at various stages of a frequency to time transform used for transforming obtained correlation results into the time domain. The invention relates equally to a corresponding system, to a corresponding method and to a corresponding software program product.
Abstract:
외부로부터 수신한 기상 신호를 펄스압축하고, 펄스압축된 기상신호에 기초하여 상관계수를 계산하고, 상관계수에 기초하여 기상변수를 산출하는 연산처리장치, 연산처리장치를 제어하고, 연산처리장치에서 산출된 기상변수를 수신하여, 원시(raw) 기상변수로 변환하는 운영제어장치 및 운영제어장치로부터 원시 기상변수를 수신하여 저장하고, 원시 기상변수에 따라 실시간 수신 산출물을 표출하는 표출분석장치를 포함하는 기상정보 신호처리모듈이 개시되어 있다.
Abstract:
A method and a device for encoding an address of data are provided. The method involves: for one or more bits of a received uncoded address, performing an exclusive OR operation by using a plurality of predetermined transformation polynomials; obtaining an encoded address according to the result of the exclusive OR operation. The solution relates to the technical field of communication, can effectively prevent attacks, needs few resources and low costs when processing bank conflicts, and applies to applications which need a large capacity DRAM, require high performance and high reliability and have a demand for preventing the attacks.
Abstract:
A symbol sequence contained in a received signal comprising a cyclic convolution of a Walsh code multiplexed signal and a channel impulse response of a multipath channel is detected using Walsh Hadamard domain equalization techniques. The method comprises converting the received signal and the channel impulse response of the multipath channel from the time domain to the WHT domain, and determining the symbol sequence based on equalizing the received signal in the WHT domain using WHT spectra of the channel impulse response to remove inter-symbol interference from the received signal due to cross-correlation between Walsh codes.
Abstract:
The present invention is generally related to the correlation of physical and/or chemical measurements with other physical and/or chemical measurements and the application of the correlation to transform a product or process (e.g., to formulate, mix, blend compounds or materials of various natures and origins) upon predicting/estimating certain property(ies) and/or performance index(ices) as indicated by a dependent variable estimate. Embodiments of the inventive technology applies specifically to the problem of producing a correlation when the independent variables of interest exceed the number of observations. This situation is common in many fields of science and technology, such as, but not limited to, spectroscopy, calorimetry, thermogravimetric, chromatography and others. A perhaps primary advantage of embodiments of the inventive method over prior art is the ability to generate correlations directly in terms of measured variables.
Abstract:
A processor can be associated with a memory for storing convolution data. A plurality of M filters from a corresponding plurality of M input channels to a selected one output channel can be provided, wherein each filter can be represented by a corresponding index, m. Each of the M filters can be partitioned into K respective filter partitions, wherein each respective filter partition can be represented by a corresponding index, k. A frequency-domain representation of each filter partition can be provided, wherein each frequency-domain representation of a filter partition comprises N frequency bins and a corresponding frequency-domain filter coefficient, wherein each respective frequency bin can be represented by a corresponding index, n. The memory can store such information in an arrangement suitable for the processor to concurrently receive sufficient information to concurrently convolve a frame of each input signal with the respective filters.