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81. 发明专利

CA2897321C MODEL BASED PREDICTION IN A CRITICALLY SAMPLED FILTERBANK 未知
公开(公告)号：CA2897321C
公开(公告)日：2018-09-04
申请号：CA2897321
申请日：2014-01-07
申请人： DOLBY INT AB
发明人： VILLEMOES LARS
IPC分类号： G10L19/093
摘要： The present document relates to audio source coding systems. In particular, the present document relates to audio source coding systems which make use of linear prediction in combination with a filterbank. A method for estimating a first sample (615) of a first subband signal in a first subband of an audio signal is described. The first subband signal of the audio signal is determined using an analysis filterbank (612) comprising a plurality of analysis filters which provide a plurality of subband signals in a plurality of subbands from the audio signal, respectively. The method comprises determining a model parameter (613) of a signal model;determining a prediction coefficient to be applied to a previous sample (614) of a first decoded subband signals derived from the first subband signal, based on the signal model, based on the model parameter (613) and based on the analysis filterbank (612); wherein a time slot of the previous sample (614) is prior to a time slot of the first sample (615); and determining an estimate of the first sample (615) by applying the prediction coefficient to the previous sample (614).

82. 发明专利

HK1245554A1 基於複指數調製的濾波器組的高級處理和自適應時間信號傳送方法未知
公开(公告)号：HK1245554A1
公开(公告)日：2018-08-24
申请号：HK18104577
申请日：2018-04-09
申请人： DOLBY INT AB
发明人： ENGDEGARD JONAS , VILLEMOES LARS
IPC分类号： H04S20060101 , G10L19/008 , G10L19/02 , H03H17/02

83. 发明专利

HK1245552A1 基於複指數調製的濾波器組的高級處理和自適應時間信號傳送方法未知
公开(公告)号：HK1245552A1
公开(公告)日：2018-08-24
申请号：HK18104574
申请日：2018-04-09
申请人： DOLBY INT AB
发明人： ENGDEGARD JONAS , VILLEMOES LARS
IPC分类号： H04S20060101 , G10L19/008 , G10L19/02 , H03H17/02

84. 发明专利

DK3079152T3 AUDIO-AFKODNING MED SELEKTIV EFTERFILTRERING 未知
公开(公告)号：DK3079152T3
公开(公告)日：2018-08-13
申请号：DK16166356
申请日：2011-06-23
申请人： DOLBY INT AB
发明人： RESCH BARBARA , KJOERLING KRISTOFER , VILLEMOES LARS
IPC分类号： G10L19/26 , G10L19/02 , G10L19/107 , G10L19/20

85. 发明专利

AU2017201872B2 Audio encoder and decoder 未知
公开(公告)号：AU2017201872B2
公开(公告)日：2018-08-09
申请号：AU2017201872
申请日：2017-03-20
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , KLEJSA JANUSZ , HEDELIN PER
IPC分类号： G10L19/02
摘要： Audio Encoder and Decoder 5 The present document relates an audio encoding and decoding system (referred to as an audio codec system). In particular, the present document relates to a transform-based audio codec system which is particularly well suited for voice encoding/decoding. A transform-based speech encoder (100, 170) configured to encode a speech signal into a bitstream is described. The encoder (100, 170) comprises a framing unit (101) configured to receive a set (132, 332) t0 of blocks; wherein the set (132, 332) of blocks comprises a plurality of sequential blocks (131) of transform coefficients; wherein the plurality of blocks (131) is indicative of samples of the speech signal; wherein a block (131) of transform coefficients comprises a plurality of transform coefficients for a corresponding plurality of frequency bins (301). Furthermore, the encoder (100, 170) comprises an envelope estimation unit (102) configured to determine a [5 current envelope (133) based on the plurality of sequential blocks (131) of transform coefficients; wherein the current envelope (133) is indicative of a plurality of spectral energy values (303) for the corresponding plurality of frequency bins (301). In addition, the encoder (100, 170) comprises an envelope interpolation unit (104) configured to determine a plurality of interpolated envelopes (136) for the plurality of blocks (131) of transform coefficients, !o respectively, based on the current envelope (133); Furthermore, the encoder (100, 170) comprises a flattening unit (108) configured to determine a plurality of blocks (140) of flattened transform coefficients by flattening the corresponding plurality of blocks (131) of transform coefficients using the corresponding plurality of interpolated envelopes (136), respectively; wherein the bitstream is determined based on the plurality of blocks (140) of 25 flattened transform coefficients. (Fig. 1) 1 /6 - - - - - - - - - I Io IO FI (D 0)I I In I In --- o a) 0 I Io I ) a) ( Y C:J 0 0 :

86. 发明专利

CA2926491C CROSS PRODUCT ENHANCED HARMONIC TRANSPOSITION 未知
公开(公告)号：CA2926491C
公开(公告)日：2018-08-07
申请号：CA2926491
申请日：2010-01-15
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , HEDELIN PER
IPC分类号： G10L19/02 , G10L19/16 , G10L21/038 , G10L21/04
摘要： The present invention relates to audio coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR). A system and a method for generating a high frequency component of a signal from a low frequency component of the signal is described. The system comprises an analysis filter bank providing a plurality of analysis subband signals of the low frequency component of the signal. It also comprises a non-linear processing unit to generate a synthesis subband signal with a synthesis frequency by modifying the phase of a first and a second of the plurality of analysis subband signals and by combining the phase-modified analysis subband signals. Finally, it comprises a synthesis filter bank for generating the high frequency component of the signal from the synthesis subband signal.

87. 发明专利

PL2981958T3 Koder i dekoder audio 未知
公开(公告)号：PL2981958T3
公开(公告)日：2018-07-31
申请号：PL14715307
申请日：2014-04-04
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , KLEJSA JANUSZ , HEDELIN PER
IPC分类号： G10L19/02 , G10L19/032 , G10L19/06

88. 发明专利

AU2017204074B2 Cross Product Enhanced Subband Block Based Harmonic Transposition 未知
公开(公告)号：AU2017204074B2
公开(公告)日：2018-07-05
申请号：AU2017204074
申请日：2017-06-16
申请人： DOLBY INT AB
发明人： VILLEMOES LARS
IPC分类号： G10L21/02 , G10L21/038 , G10L21/04
摘要： The invention is directed to a system configured to generate a time stretched and/or frequency trans posed signal from an input signal. The system comprises an analysis filter bank configured to derive a number Y > 1 of analysis subband signals from the input signal, wherein each analysis subband 5 signal comprises a plurality of complex-valued analysis samples, each having a phase and a magni tude; a subband processing unit configured to generate a synthesis subband signal from the Y analy sis subband signals using a subband transposition factor Q and a subband stretch factor S, at least one of Q and S being greater than one, the subband processing unit comprises a block extractor con figured to i) form Y frames of L input samples, each frame being extracted from said plurality of 0 complex-valued analysis samples in an analysis subband signal and the frame length being L > 1; and ii) apply a block hop size of h samples to said plurality of analysis samples, prior to forming a subsequent frame of L input samples, thereby generating a sequence of frames of input samples; a nonlinear frame processing unit configured to generate, on the basis of Y corresponding frames of input samples formed by the block extractor, a frame of processed samples by determining a phase 5 and magnitude for each processed sample of the frame, wherein, for at least one processed sample: i) the phase of the processed sample is based on the respective phases of the corresponding input sample in each of the Y frames of input samples; and ii) the magnitude of the processed sample is determined as a mean value of the magnitude of the corresponding input sample in a first frame of the Y frames of input samples and the magnitude of the corresponding input sample in a second '0 frame of the Y frames of input samples; and an overlap and add unit configured to determine the synthesis subband signal by overlapping and adding the samples of a sequence of frames of pro cessed samples. The system further comprises a synthesis filter bank configured to generate the time stretched and/or frequency transposed signal from the synthesis subband signal, wherein the system is operable at least for Y= 2. WO 2012/034890 PCT/EP2011/065318 g A. ----------------- Fig. I 12 a 204 Fig42

89. 发明专利

MY166169A AUDIO SIGNAL ENCODER,AUDIO SIGNAL DECODER,METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING AN ALIASING-CANCELLATION 未知
公开(公告)号：MY166169A
公开(公告)日：2018-06-07
申请号：MYPI2012001753
申请日：2010-10-19
申请人： FRAUNHOFER GES FORSCHUNG , VOICEAGE CORP , KONINL PHILIPS ELECTRONICS NV , DOLBY INT AB
发明人： BESSETTE BRUNO , VILLEMOES LARS , SALAMI REDWAN , BRINKER ALBERTUS C DEN , NEUENDORF MAX , GEIGER RALF , GOURNAY PHILIPPE , LEFEBVRE ROCH , GRILL BERHAARD , LECOMTE JEREMIE , BAYER STEFAN , RETTELBACH NOKOLAUS
IPC分类号： G10L19/00 , G10L19/02 , G10L19/03 , G10L19/12 , G10L19/20 , G10L21/00
摘要： AN AUDIO SIGNAL DECODER (200) FOR PROVIDING A DECODED REPRESENTATION (212) OF AN AUDIO CONTENT ON THE BASIS OF AN ENCODED REPRESENTATION (310) OF THE AUDIO CONTENT COMPRISES A TRANSFORM DOMAIN PATH (230, 240, 242, 250, 260) CONFIGURED TO OBTAIN A TIME-DOMAIN REPRESENTATION (212) OF A PORTION OF THE AUDIO CONTENT ENCODED IN A TRANSFORM-DOMAIN MODE ON THE BASIS OF A FIRST SET (220) OF SPECTRAL COEFFICIENTS, A REPRESENTATION (224) OF AN ALIASING-CANCELLATION STIMULUS SIGNAL AND A PLURALITY OF LINEAR-PREDICTION-DOMAIN PARAMETERS (222). THE TRANSFORM DOMAIN PATH COMPRISES A SPECTRUM PROCESSOR (230) CONFIGURED TO APPLY A SPECTRUM SHAPING TO THE FIRST SET OF SPECTRAL COEFFICIENTS IN DEPENDENCE ON AT LEAST A SUBSET OF THE LINEAR-PREDICTION-DOMAIN PARAMETERS, TO OBTAIN A SPECTRALLY-SHAPED VERSION (232) OF THE FIRST SET OF SPECTRAL COEFFICIENTS. THE TRANSFORM DOMAIN PATH COMPRISES A FIRST FREQUENCY-DOMAIN-TO-TIME-DOMAIN CONVERTER (240) CONFIGURED TO OBTAIN A TIME-DOMAIN REPRESENTATION OF THE AUDIO CONTENT ON THE BASIS OF THE SPECTRALLY-SHAPED VERSION OF THE FIRST SET OF SPECTRAL COEFFICIENTS. THE TRANSFORM DOMAIN PATH COMPRISES AN ALIASING-CANCELLATION STIMULUS FILTER CONFIGURED TO FILTER (250) THE ALIASING-CANCELLATION STIMULUS SIGNAL (324) IN DEPENDENCE ON AT LEAST A SUBSET OF THE LINEAR-PREDICTION-DOMAIN PARAMETERS (222), TO DERIVE AN ALIASING-CANCELLATION SYNTHESIS SIGNAL (252) FROM THE ALIASING-CANCELLATION STIMULUS SIGNAL. THE TRANSFORM DOMAIN PATH ALSO COMPRISES A COMBINER (260) CONFIGURED TO COMBINE THE TIME-DOMAIN REPRESENTATION (242) OF THE AUDIO CONTENT WITH THE ALIASING-CANCELLATION SYNTHESIS SIGNAL (252), OR A POST-PROCESSED VERSION THEREOF, TO OBTAIN AN ALIASING REDUCED TIME-DOMAIN SIGNAL. (FIG. 2)

90. 发明专利

PL2265041T3 Zaawansowane procesowanie oparte o zespolony-wykładniczo-modulowany zespół filtrów i sposoby sygnalizowania adaptacyjnego w czasie 未知
公开(公告)号：PL2265041T3
公开(公告)日：2018-05-30
申请号：PL10180688
申请日：2004-04-30
申请人： DOLBY INT AB
发明人： ENGDEGARD JONAS , VILLEMOES LARS
IPC分类号： H04S3/00 , G10L19/00 , G10L19/008 , G10L19/02 , H03H17/02

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