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51. 发明公开

EP1671316A1 ENCODING AUDIO SIGNALS 有权转让
标题翻译：编码音频信号
公开(公告)号：EP1671316A1
公开(公告)日：2006-06-21
申请号：EP04770014.1
申请日：2004-09-16
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J.
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S2420/03
摘要： The encoder transforms the audio signals (x(n),y(n)) from the time domain to audio signal (X(k),Y(k)) in the frequency domain, and determines the cross-correlation function (Ri, Pi) in the frequency domain. A complex coherence value (Qi) is calculated by summing the (complex) cross-correlation function values (Ri, Pi) in the frequency domain. The inter-channel phase difference (IPDi) is estimated by the argument of the complex coherence value (Qi), and the inter-channel coherence (ICi) is estimated by the absolute value of the complex coherence value (Qi). In the prior art a computational intensive Inverse Fast Fourier Transformation and search for the maximum value of the cross-correlation function (Ri; Pi) in the time domain are required.
摘要翻译：编码器在频域中将音频信号（x（n），y（n））从时域变换为音频信号（X（k），Y（k）），并且确定互相关函数（Ri， Pi）在频域中。通过在频域中对（复数）互相关函数值（Ri，Pi）求和来计算复相干值（Qi）。信道间相位差（IPDi）由复相干值（Qi）的自变量估计，并且通道间相干性（ICi）由复相干值（Qi）的绝对值估计。在现有技术中，需要计算密集的逆快速傅里叶变换和搜索时域中互相关函数（R 1; P i）的最大值。

52. 发明公开

EP1941486A1 METHOD OF DERIVING A SET OF FEATURES FOR AN AUDIO INPUT SIGNAL 有权转让
标题翻译： FOR领导方法属性的数量AUDIO INPUT
公开(公告)号：EP1941486A1
公开(公告)日：2008-07-09
申请号：EP06809601.5
申请日：2006-10-16
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J. , MCKINNEY, Martin, F.
IPC分类号： G10H1/00
CPC分类号： G10H1/0008 , G10H2210/031 , G10H2210/041 , G10H2240/081
摘要： The invention describes a method of deriving a set of features (S) of an audio input signal (M), which method comprises identifying a number of first-order features (f1, f2, ... , ff) of the audio input signal (M), generating a number of correlation values (ρ1 , ρ2, ... , ρI) from at least part of the first-order features (f1, f2, ... , ff), and compiling the set of features (S) for the audio input signal (M) using the correlation values (ρ1, ρ2, ..., ρI). The invention further describes a method of classifying an audio input signal (M) into a group, and a method of comparing audio input signals (M, M') to determine a degree of similarity between the audio input signals (M, M'). The invention also describes a system (1) for deriving a set of features (S) of an audio input signal (M), a classifying system (4) for classifying an audio input signal (M) into a group, and a comparison system (5) for comparing audio input signals (M, M') to determine a degree of similarity between the audio input signals (M, M').

53. 发明授权

EP1735774B1 MULTI-CHANNEL ENCODER 有权转让
标题翻译：多信道编码器
公开(公告)号：EP1735774B1
公开(公告)日：2008-05-14
申请号：EP05718568.8
申请日：2005-03-25
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J. , SCHUIJERS, Erik, G., P. , HOTHO, Gerard, H. , VAN LOON, Machiel, W.
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： There is described a multi-channel encoder (10; 600) for processing input signals conveyed in N input channels to generate corresponding output signals conveyed in M output channels together with complementary parametric data; M and N are integers wherein N>M. The encoder (10; 600) includes a down-mixer for down-mixing the input signals to generate the corresponding output signals, the encoder also comprising an analyser for processing the input signals to generate the parameter data, said parametric data describing mutual differences between the N channels of input signal to allow for regenerating during decoding one or more of the N channels of input signals from the M channels of output signal. Such an encoder (10; 600) is capable of providing highly efficient data encoding and also of being backwards compatibility with relatively simpler decoders having fewer than N decoding output channels. The invention also concerns decoders (800) compatible with such a multi-channel encoder (10; 600).

54. 发明授权

EP1500084B1 PARAMETRIC REPRESENTATION OF SPATIAL AUDIO 有权转让
标题翻译：空间的参数表示
公开(公告)号：EP1500084B1
公开(公告)日：2008-01-23
申请号：EP03715237.8
申请日：2003-04-22
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J. , VAN DE PAR, Steven, L., J., D., E.
IPC分类号： G10L19/00 , H04S3/00
CPC分类号： H04R5/00 , G10L19/008 , H04S3/008 , H04S2420/03
摘要： In summary, this application describes a psycho-acoustically motivated, parametric description of the spatial attributes of multichannel audio signals. This parametric description allows strong bitrate reductions in audio coders, since only one monaural signal has to be transmitted, combined with (quantized) parameters which describe the spatial properties of the signal. The decoder can form the original amount of audio channels by applying the spatial parameters. For near-CD-quality stereo audio, a bitrate associated with these spatial parameters of 10 kbit/s or less seems sufficient to reproduce the correct spatial impression at the receiving end.

55. 发明公开

EP1810279A1 ENCODING AND DECODING OF MULTI-CHANNEL AUDIO SIGNALS 有权转让
标题翻译：编码和解码的多通道音频
公开(公告)号：EP1810279A1
公开(公告)日：2007-07-25
申请号：EP05797453.7
申请日：2005-10-31
申请人： Koninklijke Philips Electronics N.V.
发明人： HOTHO, Gerard, H. , MYBURG, Francois, P. , BREEBAART, Dirk, J.
IPC分类号： G10L19/00 , H04B1/66
CPC分类号： G10L19/008 , G10L21/028
摘要： An encoding device (1) for converting a first number (M) of input audio channels into a second, smaller number (N) of output audio channels comprises at least one conversion unit (12) for converting a first signal (Lf; Rf; Co) and a second signal (Lr; Rr; Le) into a third signal (L; R; C) and a fourth signal (Ls; Rs; Cs). The third, dominant signal contains most of the signal energy of the first and second signals, while the fourth, residual signal contains the remainder of said signal energy. The encoding device is arranged for using the third signal (L; R; C) to produce an output signal and for outputting the fourth signal (Ls; Rs; Cs). A decoding device (2) for converting a first number (N) of input audio channels into a second, larger number (M) or output audio channels comprises at least one conversion unit (24) for converting a first signal (L; R; C) and a second signal (Ld; Rd; Ld) into a third signal (Lf, Rf; Co) and a fourth signal (Lr; Rr; Le). The first, dominant signal contains most of the signal energy of the third and fourth signal, while the second, residual signal contains the remainder of said signal energy. The encoding device is arranged for receiving at least one-second signal (Ld; Rd; Cd).

56. 发明公开

EP1769491A1 AUDIO CHANNEL CONVERSION 有权转让
标题翻译： TONKANALKONVERTIERUNG
公开(公告)号：EP1769491A1
公开(公告)日：2007-04-04
申请号：EP05765606.8
申请日：2005-07-11
申请人： Koninklijke Philips Electronics N.V. , Coding Technologies Sweden AB
发明人： BREEBAART, Dirk, J. , SCHUIJERS, Erik, G., P. , PURNHAGEN, Heiko , RÖDÉN, Karl, J.
IPC分类号： G10L19/00 , H04S5/00
CPC分类号： H04S5/005 , G10L19/008
摘要： A device (1) for converting a first number (M) of input audio channels into a second, larger number (N) of output audio channels comprises: decorrelation units (3) for decomposing the input audio channels into a set of decorrelated auxiliary channels, at least one upmix unit (4) for combining the decorrelated auxiliary channels into the output audio channels, and at least one pre-processing unit (2) for pre-processing the input audio channels and feeding the pre-processed input audio channels to the decorrelation units (3). The pre-processing unit (2) and the upmix unit (4) are preferably controlled by audio parameters.

57. 发明公开

EP1554716A1 SIGNAL FILTERING 审中-公开
标题翻译： SIGNALFILTERUNG
公开(公告)号：EP1554716A1
公开(公告)日：2005-07-20
申请号：EP03715240.2
申请日：2003-04-22
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J. , SCHUIJERS, Erik, G., P.
IPC分类号： G10L19/02
CPC分类号： G10L19/008 , H04S3/008 , H04S2420/03
摘要： A method of filtering an information signal (x(t)), the method comprising modifying frequency domain components (X(k,n)) of the information signal according to a desired filter response (F(k,n)); wherein the step of modifying frequency domain components further comprises modifying (105) frequency domain components of a first frame of said information signal according to a first actual filter response (F'(k,n)), the first actual filter response being a function (Φ) of the desired filter response and information (108) related to a previous frame of the information signal.

58. 发明公开

EP1500082A1 SIGNAL SYNTHESIZING 有权转让
标题翻译：信号合成
公开(公告)号：EP1500082A1
公开(公告)日：2005-01-26
申请号：EP03712593.7
申请日：2003-04-22
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J.
IPC分类号： G10L19/02
CPC分类号： G10L19/008 , G10L19/24 , H04S3/008 , H04S2420/03
摘要： A method of synthesizing a first (L) and a second (R) output signal from an input signal (x). The method comprises: filtering (201) the input signal to generate a filtered signal; obtaining a correlation parameter indicative of a desired correlation between the first and second output signals; obtaining a level parameter (c) indicative of a desired level difference between the first and second input signals; and transforming the input signal and the filtered signal by a matrixing operation (203) into the first and second output signals, where the matrixing operation depends on the correlation parameter and the level parameter.

59. 发明公开

EP1927266A1 AUDIO CODING 有权转让
标题翻译：声音编码
公开(公告)号：EP1927266A1
公开(公告)日：2008-06-04
申请号：EP06795846.2
申请日：2006-08-31
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J.
IPC分类号： H04S3/00
CPC分类号： H04S3/004 , H04R2499/11 , H04S7/30 , H04S2400/01 , H04S2420/01 , H04S2420/03
摘要： A spatial decoder unit (23) is arranged for transforming one or more audio channels (s; 1, r) into a pair of binaural output channels (Ib, rb). The device comprises a parameter conversion unit (234) for converting the spatial parameters (sp) into binaural parameters (bp) containing binaural information. The device additionally comprises a spatial synthesis unit (232) for transforming the audio channels (L, R) into a pair of binaural signals (Lb, Rb) while using the binaural parameters (bp). The spatial synthesis unit (232) preferably operates in a transform domain, such as the QMF domain.

60. 发明授权

EP1671316B1 ENCODING AUDIO SIGNALS 有权转让
标题翻译：编码的音频信号
公开(公告)号：EP1671316B1
公开(公告)日：2007-08-01
申请号：EP04770014.1
申请日：2004-09-16
申请人： Koninklijke Philips Electronics N.V.
发明人： BREEBAART, Dirk, J.
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S2420/03
摘要： The encoder transforms the audio signals (x(n),y(n)) from the time domain to audio signal (X(k),Y(k)) in the frequency domain, and determines the cross-correlation function (Ri, Pi) in the frequency domain. A complex coherence value (Qi) is calculated by summing the (complex) cross-correlation function values (Ri, Pi) in the frequency domain. The inter-channel phase difference (IPDi) is estimated by the argument of the complex coherence value (Qi), and the inter-channel coherence (ICi) is estimated by the absolute value of the complex coherence value (Qi). In the prior art a computational intensive Inverse Fast Fourier Transformation and search for the maximum value of the cross-correlation function (Ri; Pi) in the time domain are required.

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