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61. 发明专利

CA3040083C METHOD FOR REDUCTION OF ALIASING INTRODUCED BY SPECTRAL ENVELOPE ADJUSTMENT IN REAL-VALUED FILTERBANKS 未知
公开(公告)号：CA3040083C
公开(公告)日：2020-01-14
申请号：CA3040083
申请日：2003-08-27
申请人： DOLBY INT AB
发明人： KJORLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/02 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/02
摘要： A method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.

62. 发明专利

HK1259302A1 解碼在填充元素中具有增强頻譜帶複製元數據的音頻位流未知
公开(公告)号：HK1259302A1
公开(公告)日：2019-11-29
申请号：HK19101666
申请日：2017-12-28
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , PURNHAGEN HEIKO , EKSTRAND PER
IPC分类号： G10L20060101

63. 发明专利

CA3012134C MODEL BASED PREDICTION IN A CRITICALLY SAMPLED FILTERBANK 未知
公开(公告)号：CA3012134C
公开(公告)日：2019-10-15
申请号：CA3012134
申请日：2014-01-07
申请人： DOLBY INT AB
发明人： VILLEMOES LARS
IPC分类号： G10L19/06 , G10L19/032 , G10L19/093
摘要： The present document describes methods and systems which improve the quality of audio source coding employing prediction in the subband domain of a critically sampled filterbank. The methods and systems may make use of a compact description of subband predictors, wherein the description is based on signal models. Alternatively or in addition, the methods and systems may make use of an efficient implementation of predictors directly in the subband domain. Alternatively or in addition, the methods and systems may make use of cross subband predictor terms, as described in the present document, to allow for a reduction of alias artifacts.

64. 发明专利

CA2989595C DECODING AUDIO BITSTREAMS WITH ENHANCED SPECTRAL BAND REPLICATION METADATA IN AT LEAST ONE FILL ELEMENT 未知
公开(公告)号：CA2989595C
公开(公告)日：2019-10-15
申请号：CA2989595
申请日：2016-03-10
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , PURNHAGEN HEIKO , EKSTRAND PER
IPC分类号： G10L19/00
摘要： Embodiments relate to an audio processing unit that includes a buffer, bitstream payload deformatter, and a decoding subsystem. The buffer stores at least one block of an encoded audio bitstream. The block includes a fill element that begins with an identifier followed by fill data. The fill data includes at least one flag identifying whether enhanced spectral band replication (eSBR) processing is to be performed on audio content of the block. A corresponding method for decoding an encoded audio bitstream is also provided.

65. 发明专利

BRPI0605865B1 codificação hierárquica de áudio multicanais com informações colaterais compactas 未知
公开(公告)号：BRPI0605865B1
公开(公告)日：2019-09-03
申请号：BRPI0605865
申请日：2006-02-01
申请人： CODING TECH AB , DOLBY INT AB , DOLBY SWEDEN AB , FRAUNHOFER GES FORSCHUNG , KONINL PHILIPS ELECTRONICS NV
发明人： BREEBAART JEROEN , ENGDEGARD JONAS , HERRE JUERGEN , HOELZER ANDREAS , KJOERLING KRISTOFER , OOMEN WERNER , PURNHAGEN HEIKO , ROEDEN JONAS , SCHUIJERS ERIK , VILLEMOES LARS
IPC分类号： H04S3/00 , G10L19/008
摘要： codificação hierárquica de àudio multicanais com informações colaterais compactas. uma representação paramétrica de um sinal de áudio multicanais descreve bem as propriedades espaciais do sinal de áudio com informações colaterais compactas quando as informações de coerência, que descrevem a coerência entre um primeiro e um segundo canais, são obtidas dentro de um processo de codificação hierárquica somente para pares de canais que incluem um primeiro canal tendo somente informações de um lado esquerdo em relação à uma posição de audição e incluindo um segundo canal tendo somente informações de um lado direito em relação à uma posição de audição. como dentro do processo hierárquico os canais de áudio múltiplo do sinal de áudio passam por downmix iterativamente para canais monofônicos, é possível escolher os parâmetros relevantes de uma etapa de codificação envolvendo somente os pares de canais que transportam as informações necessárias para descrever as propriedades espaciais do sinal de áudio multicanais.

66. 发明专利

RU2698154C1 СТЕРЕОФОНИЧЕСКОЕ КОДИРОВАНИЕ НА ОСНОВЕ MDCT С КОМПЛЕКСНЫМ ПРЕДСКАЗАНИЕМ 未知
公开(公告)号：RU2698154C1
公开(公告)日：2019-08-22
申请号：RU2019106714
申请日：2019-03-11
申请人： DOLBY INT AB
发明人： CARLSSON PONTUS , PURNHAGEN HEIKO , VILLEMOES LARS
IPC分类号： G10L19/008 , G10L19/06
摘要： Изобретениеотноситсяк средствамстереофоническогокодированиянаоснове MDCT скомплекснымпредсказанием. Техническийрезультатзаключаетсяв повышенииэффективностистереофоническогокодированияприпередачеданныхс высокойбитовойскоростью. Получаютвыходнойстереофоническийсигнализвходногостереофоническогосигнала, закодированногопосредствомстереофоническогокодированияс комплекснымпредсказаниеми включающегопервыепредставлениядвухвходныхканаловв частотнойобласти. Кодированиевключаетследующиеэтапыповышающегомикширования: (i) вычислениевторогопредставленияпервоговходногоканалав частотнойобластии (ii) вычислениевыходногоканаланаосновепервогои второгопредставленийпервоговходногоканалав частотнойобласти, первогопредставлениявтороговходногоканалав частотнойобластии коэффициентакомплексногопредсказания. Повышающеемикшированиеможетбытьприостановленов ответнауправляющиеданные. 3 н. и 10 з.п. ф-лы, 19 ил.

67. 发明专利

HK1254427A1 對音頻信號的時間伸縮改進變換編碼未知
公开(公告)号：HK1254427A1
公开(公告)日：2019-07-19
申请号：HK18113511
申请日：2018-10-22
申请人： DOLBY INT AB
发明人： VILLEMOES LARS
IPC分类号： G10L25/90

68. 发明专利

AU2019204026B2 Audio Upmixer Operable in Prediction or Non-Prediction Mode 未知
公开(公告)号：AU2019204026B2
公开(公告)日：2019-07-18
申请号：AU2019204026
申请日：2019-06-07
申请人： DOLBY INT AB
发明人： CARLSSON PONTUS , PURNHAGEN HEIKO , VILLEMOES LARS
IPC分类号： G10L19/00 , G10L19/008
摘要： The present invention is directed to a decoder system for providing a stereo signal from a bit stream signal by complex prediction stereo coding. The decoder system comprises an upmix stage adapted to generate the stereo signal based on first frequency-domain representations of a downmix signal (M) and a residual signal (D), each of the first frequency-domain representations comprising first spectral components representing spectral content of the corresponding signal expressed in a first subspace of a multidimensional space. The upmix stage comprises a module for computing a second frequency-domain representation of the downmix signal based on the first frequency-domain representation thereof, the second frequency-domain representation comprising second spectral components representing spectral content of the signal expressed in a second subspace of the multidimensional space that includes a portion of the multidimensional space not included in the first subspace, wherein the module is adapted to determine the second spectral components of the downmix signal by applying a Finite Impulse Reponse (FIR) filter to the first spectral components of the downmix signal; a weighted summer for computing a side signal (S) on the basis of the first and second frequency-domain representations of the downmix signal, the first frequency domain representation of the residual signal and a complex prediction coefficient (a) encoded in the bit stream signal; and a sum-and-difference stage for computing the stereo signal on the basis of the first frequency-domain representation of the downmix signal and the side signal. The decoder system comprises a first frequency-domain modifier stage arranged upstream of the upmix stage and operable in an active mode, in which it processes a frequency-domain representation of at least one signal, and a passive mode, in which it acts as a pass-through; and a second frequency-domain modifier stage arranged downstream of the upmix stage and operable in an active mode, in which it processes a frequency-domain representation of at least one signal, and a passive mode, in which it acts as a pass-through. -Lg II.a a3 Sip) m 03 c')E 0 a ac U) ci,0 aC17, 0 0E = -0 a3 ?r C-D C3 0,

69. 发明专利

ES2712457T3 Sistema de filtro que comprende un convertidor de filtro y un compresor de filtro y procedimiento para el funcionamiento del sistema de filtro 未知
公开(公告)号：ES2712457T3
公开(公告)日：2019-05-13
申请号：ES17172246
申请日：2007-07-03
申请人： DOLBY INT AB
发明人： VILLEMOES LARS
IPC分类号： H03H17/02 , G10L19/02
摘要： Sistema de filtro que comprende: un convertidor de filtro (101) configurado para la recepción de una señal de entrada que comprende información referente a una respuesta finita al impulso de un filtro o un elemento de filtro en un dominio temporal y para la generación de respuestas al impulso de filtro de subbanda de entrada correspondientes a subbandas, que comprenden valores de respuesta al impulso de filtro en derivaciones de filtro; y un compresor de filtro (102, 501) para la generación de respuestas al impulso de filtro de subbanda comprimidas desde las respuestas al impulso de filtro de subbanda de entrada, comprendiendo el compresor de filtro: un procesador (820) para examinar los valores de respuesta al impulso de filtro de al menos dos respuestas al impulso de filtro de subbanda de entrada para encontrar valores de respuesta al impulso que tienen valores más altos y al menos un valor de respuesta al impulso de filtro que tiene un valor que es más bajo que los valores más altos; y un constructor de respuestas al impulso de filtro (305) para construir las respuestas al impulso de filtro de subbanda comprimidas mediante el uso de los valores de respuesta al impulso de filtro que tienen valores más altos, en el que las respuestas al impulso de filtro de subbanda comprimidas no incluyen valores de respuesta al impulso de filtro correspondientes a las derivaciones de filtro de al menos un valor de respuesta al impulso de filtro que tiene el valor más bajo; o comprenden valores de respuesta al impulso de filtro con valor cero correspondientes a las derivaciones de filtro de al menos un valor de respuesta al impulso de filtro que tiene el valor más bajo.

70. 发明专利

PL2947657T3 Wielokanałowe kodowanie przy użyciu predykcji zespolonej i wskaźnika rzeczywistego 未知
公开(公告)号：PL2947657T3
公开(公告)日：2019-04-30
申请号：PL15176785
申请日：2011-03-23
申请人： FRAUNHOFER GES FORSCHUNG , DOLBY INT AB
发明人： PURNHAGEN HEIKO , CARLSSON PONTUS , VILLEMOES LARS , ROBILLIARD JULIEN , NEUSINGER MATTHIAS , HELMRICH CHRISTIAN , HILPERT JOHANNES , RETTELBACH NIKOLAUS , DISCH SASCHA , EDLER BERND
IPC分类号： G10L19/008 , G10L19/04

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