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1. 发明公开

EP2777298A1 METHOD AND APPARATUS FOR PROCESSING SIGNALS OF A SPHERICAL MICROPHONE ARRAY ON A RIGID SPHERE USED FOR GENERATING AN AMBISONICS REPRESENTATION OF THE SOUND FIELD 有权转让
标题翻译：方法和设备对于球形麦克风排列在一个刚性球处理信号用于生产补球功能，播放或重放声场AMBISONICS-的
公开(公告)号：EP2777298A1
公开(公告)日：2014-09-17
申请号：EP12788472.4
申请日：2012-10-31
申请人： Thomson Licensing
发明人： KORDON, Sven , BATKE, Johann-Markus , KRÜGER, Alexander
IPC分类号： H04R3/00 , H04R5/027
CPC分类号： H04R3/005 , H04R1/326 , H04R1/406 , H04R5/027 , H04R29/005 , H04R2201/401 , H04S2400/15
摘要： Spherical microphone arrays capture a three-dimensional sound field {P(Jlc,t)) for generating an Ambisonics representation {A™(t)), where the pressure distribution on the surface of the sphere is sampled by the capsules of the array. The impact of the microphones on the captured sound field is removed using the inverse microphone transfer function. The equalisation of the transfer function of the microphone array is a big problem because the reciprocal of the transfer function causes high gains for small values in the transfer function and these small values are affected by transducer noise. The invention estimates (73) the signal-to-noise ratio between the average sound field power and the noise power from the microphone array capsules, computes (74) the average spatial signal power at the point of origin for a diffuse sound field, and designs in the frequency domain the frequency response of the equalisation filter from the square root of the fraction of a given reference power and the simulated power at the point of origin.

2. 发明授权

EP2636036B1 DATA STRUCTURE FOR HIGHER ORDER AMBISONICS AUDIO DATA 有权转让
标题翻译：数据结构立体混响音频数据高阶
公开(公告)号：EP2636036B1
公开(公告)日：2014-08-27
申请号：EP11776422.5
申请日：2011-10-26
申请人： Thomson Licensing
发明人： KEILER, Florian , KORDON, Sven , BOEHM, Johannes , KROPP, Holger , BATKE, Johann-Markus
IPC分类号： G10L19/008 , H04R5/02 , H04S3/00
CPC分类号： H04R5/02 , G10L19/008 , G10L19/167 , H04S3/00 , H04S2420/11

3. 发明公开

EP2250642A1 METHOD AND APPARATUS FOR TRANSFORMING BETWEEN DIFFERENT FILTER BANK DOMAINS 有权
标题翻译：方法和设备为不同的域之间的转换滤波器
公开(公告)号：EP2250642A1
公开(公告)日：2010-11-17
申请号：EP09716549.2
申请日：2009-02-19
申请人： Thomson Licensing
发明人： JAX, Peter , KORDON, Sven
IPC分类号： G10L19/14 , H04N7/26
CPC分类号： G10L19/173 , G10L19/0204 , G10L19/0212
摘要： Filter banks may have different structures and different individual output signal domains. Often a translation between different filter bank domains is desirable. Usually, mapping matrices are used that however vary over frequency. This requires a significant amount of lookup tables. A method for transforming first data frames of a first filter bank domain (D S ) to second data frames of a different second filter bank domain (D T ), comprises steps of transcoding sub-bands (mp3(m-1),mp3(m),mp3(m+1)) of the first filter bank domain (D S ) into sub-bands (psdo(m-1), psdo(m),psdo(m+1)) of an intermediate domain (D i ) that corresponds to said second filter bank domain but has warped phase, and transcoding the sub-bands (psdo(m-1), psdo(m), psdo(m+1)) of the intermediate domain (D i ) to sub-bands (MDCT(m-1),MDCT(m),MDCT(m+1)) of the second filter bank domain (D T ), wherein a phase correction (SSC,PCp,PC, PCn) is performed on the sub-bands of the intermediate domain (D i ).

4. 发明公开

EP2044589A1 METHOD AND APPARATUS FOR LOSSLESS ENCODING OF A SOURCE SIGNAL, USING A LOSSY ENCODED DATA STREAM AND A LOSSLESS EXTENSION DATA STREAM 有权
标题翻译：方法和设备损失大量的代码源信号，通过损失的污浊编码数据流和损失地段扩展数据流
公开(公告)号：EP2044589A1
公开(公告)日：2009-04-08
申请号：EP07787481.6
申请日：2007-07-12
申请人： Thomson Licensing
发明人： JAX, Peter , KEILER, Florian , WUEBBOLT, Oliver , KORDON, Sven , BÖHM, Johannes
IPC分类号： G10L19/00 , G10L19/14
CPC分类号： G10L19/24 , G10L19/0017 , G10L19/008
摘要： The invention is related to lossless encoding of a source signal (S PCM ), using a lossy encoded data stream and a lossless extension data stream which together form a lossless encoded data stream (S ENC ) for said source signal, whereby lossless audio compression means audio coding with bit-exact reproduction of the original PCM samples at decoder output. The lossy encoding/decoding may be an mp3 coding/decoding. The invention uses an integer MDCT and frequency domain decorre-lation (16) and time domain de-correlation (16) for the residual signal of the base-layer lossy audio codec. The exploitation of side information from the lossy base-layer codec allows for reduction of redundancies in the gross bit stream, thus improving the coding efficiency of the lossy based lossless codec.

5. 发明公开

EP2016383A1 METHOD AND APPARATUS FOR LOSSLESS ENCODING OF A SOURCE SIGNAL USING A LOSSY ENCODED DATA STREAM AND A LOSSLESS EXTENSION DATA STREAM 失效转让
标题翻译：使用损耗编码数据流和无损扩展数据流对源信号进行无损编码的方法和设备
公开(公告)号：EP2016383A1
公开(公告)日：2009-01-21
申请号：EP07728245.7
申请日：2007-04-18
申请人： Thomson Licensing
发明人： BÖHM, Johannes , JAX, Peter , KEILER, Florian , WÜBBOLT, Oliver , KORDON, Sven
IPC分类号： G01L19/00 , G10L19/14
CPC分类号： G10L19/24 , G10L19/0017
摘要： In lossy based lossless coding a PCM audio signal passes through a lossy encoder (41) to a lossy decoder (42). The lossy encoder provides a lossy bit stream. The difference signal (S Diff ) between the PCM signal and the lossy decoder output is lossless encoded (52), providing an extension bit stream. The invention facilitates enhancing a lossy perceptual audio encoding/decoding by an extension that enables mathematically exact reproduction of the original waveform using enhanced de-correlation, and provides additional data for reconstructing at decoder site an intermediate-quality audio signal. The lossless extension can be used to extend the widely used mp3 encoding/decoding to lossless encoding/decoding and superior quality mp3 encoding/de-coding.
摘要翻译：在基于有损耗的无损编码中，PCM音频信号通过有损编码器（41）传送到有损解码器（42）。有损编码器提供有损比特流。 PCM信号和有损解码器输出之间的差分信号（SDiff）被无损编码（52），提供扩展比特流。本发明有助于通过扩展实现有损感知音频编码/解码，该扩展能够使用增强的去相关在数学上精确地再现原始波形，并且提供用于在解码器站点重建中等质量音频信号的附加数据。无损扩展可用于将广泛使用的mp3编码/解码扩展到无损编码/解码和优质mp3编码/解码。

6. 发明授权

EP2250642B1 METHOD AND APPARATUS FOR TRANSFORMING BETWEEN DIFFERENT FILTER BANK DOMAINS 有权
标题翻译：方法和设备为不同的域之间的转换滤波器
公开(公告)号：EP2250642B1
公开(公告)日：2015-10-21
申请号：EP09716549.2
申请日：2009-02-19
申请人： Thomson Licensing
发明人： JAX, Peter , KORDON, Sven
IPC分类号： G10L19/16 , G10L19/02
CPC分类号： G10L19/173 , G10L19/0204 , G10L19/0212
摘要： Filter banks may have different structures and different individual output signal domains. Often a translation between different filter bank domains is desirable. Usually, mapping matrices are used that however vary over frequency. This requires a significant amount of lookup tables. A method for transforming first data frames of a first filter bank domain (D S ) to second data frames of a different second filter bank domain (D T ), comprises steps of transcoding sub-bands (mp3(m-1),mp3(m),mp3(m+1)) of the first filter bank domain (D S ) into sub-bands (psdo(m-1), psdo(m),psdo(m+1)) of an intermediate domain (D i ) that corresponds to said second filter bank domain but has warped phase, and transcoding the sub-bands (psdo(m-1), psdo(m), psdo(m+1)) of the intermediate domain (D i ) to sub-bands (MDCT(m-1),MDCT(m),MDCT(m+1)) of the second filter bank domain (D T ), wherein a phase correction (SSC,PCp,PC, PCn) is performed on the sub-bands of the intermediate domain (D i ).

7. 发明授权

EP2580752B1 METHOD AND APPARATUS FOR SEARCHING IN A LAYERED HIERARCHICAL BIT STREAM FOLLOWED BY REPLAY, SAID BIT STREAM INCLUDING A BASE LAYER AND AT LEAST ONE ENHANCEMENT LAYER 有权转让
标题翻译：一种用于在分层分级比特流和随后的重放搜索的方法和装置，所说的基层和至少一个增强层比特流
公开(公告)号：EP2580752B1
公开(公告)日：2014-08-13
申请号：EP11725389.8
申请日：2011-06-01
申请人： Thomson Licensing
发明人： JAX, Peter , KORDON, Sven
IPC分类号： G10L19/24 , H04N21/462 , H04N21/439 , G10L19/16
CPC分类号： G10L19/0017 , G10L19/167 , G10L19/24 , H04N19/44 , H04N21/4398 , H04N21/4621

8. 发明授权

EP2064700B1 METHOD AND DEVICE FOR TRANSCODING AUDIO SIGNALS 有权
标题翻译：方法和装置TRANS编码的音频信号
公开(公告)号：EP2064700B1
公开(公告)日：2012-09-05
申请号：EP07803303.2
申请日：2007-09-06
申请人： Thomson Licensing
发明人： JAX, Peter , KORDON, Sven
IPC分类号： G10L19/14 , G10L19/02
CPC分类号： G10L19/022 , G06F3/16 , G10L19/005 , G10L19/008 , G10L19/173 , H04B1/66
摘要： The present invention provides method and device for transcoding between audio coding formats with different time-frequency analysis domains, as used for example by MPEG-AAC and mp3, particularly for facilitated and faster transcoding between such audio signals. A method for transcoding a framed audio signal from a first parameter domain (PD A ) into a second parameter domain (PD 3 ) comprises linearly transforming (T T ) two or more parameters of the first parameter domain (PD A ) to at least one parameter of the second parameter domain (PD B ), wherein the two or more parameters of the first parameter domain come from different frames of the audio signal in the first parameter domain. The linear transformation (T T ) can be described as a matrix and implemented as a look-up table.

9. 发明授权

EP2289245B1 METHOD AND APPARATUS FOR GENERATING OR CUTTING OR CHANGING A FRAME BASED BIT STREAM FORMAT FILE INCLUDING AT LEAST ONE HEADER SECTION, AND A CORRESPONDING DATA STRUCTURE 有权
标题翻译： FOR生成方法和设备OR 切割或更改STREAM帧格式文件为基础与至少一个头部及相关的数据结构
公开(公告)号：EP2289245B1
公开(公告)日：2012-02-08
申请号：EP09757381.0
申请日：2009-05-11
申请人： Thomson Licensing
发明人： KORDON, Sven , JAX, Peter , BOEHM, Johannes
IPC分类号： H04N7/24 , G11B20/10
CPC分类号： G11B20/10527 , G11B20/00181 , G11B20/1262 , G11B2020/00021 , G11B2020/00057
摘要： In frame-based bit stream formats the data required for decoding a current frame are usually stored within the data section for that frame. One exception is the mp3 bit stream where data for a current frame is stored in previous frames. If the decoder did not receive the required previous frame, decoding of the current mp3 frame is skipped. The invention can be applied for such bit streams, in an archival mode, a streaming mode and a sample-exact cutting of an archival mode. In the streaming and cutting modes, new headers are established. The number of frames required for initialising the decoder status is signalised in the header, as well as a consistency check value in the streaming mode. These frames are used for decoder initialisation but not for decoding samples or coefficients. For a sample-exact cutting, for the frame at which the cut shall occur, the number of samples or coefficients to be muted is also indicated in the header. The invention can be applied for the hd3 audio file format for lossless extension of an mp3 bit stream.

10. 发明公开

EP2041743A1 AUDIO BITSTREAM DATA STRUCTURE ARRANGEMENT OF A LOSSY ENCODED SIGNAL TOGETHER WITH LOSSLESS ENCODED EXTENSION DATA FOR SAID SIGNAL 审中-公开
标题翻译：带扩展无损损失污浊的音频流数据结构安排编码信号的编码数据对于信号
公开(公告)号：EP2041743A1
公开(公告)日：2009-04-01
申请号：EP07787114.3
申请日：2007-07-05
申请人： THOMSON Licensing
发明人： WÜBBOLT, Oliver , KEILER, Florian , JAX, Peter , KORDON, Sven , BOEHM, Johannes
IPC分类号： G10L19/00 , G10L19/14
CPC分类号： G10L19/167
摘要： Lossless compression algorithms can only exploit redundancies of the original audio signal to reduce the data rate, but not irrelevancies as identified by psycho-acoustics. Lossless audio coding schemes apply a filter or transform for decorrelation and then encode the transformed signal. The encoded bit stream comprises the parameters of the transform or filter, and the lossless representation of the transformed signal. However, in case of lossy based lossless coding the additional amount of information exceeds the amount of data for the base layer by a multiple of the base layer data amount. Therefore the additional data cannot be packed completely into the base layer data stream e.g. as ancillary data. The at least two data streams resulting from the combination of lossy coding format with a lossless coding extension are the base layer containing the lossy coding information and the enhancement data stream for rebuilding the mathematically lossless original input signal. Furthermore several intermediate quality layers are possible. However, these data streams are not independent from each other. Every higher layer depends on the lower layers and can only be reasonably decoded in combination with these lower layers. According to the invention, a special combination of one-time header information with repeated header information in a block structure is used, which kind of combination depends on the type of application. Assignment information data identify the different parts or layers of the lossless format belonging to one input signal. Synchronisation data are used to combine the different data streams or parts or layers to a single lossless or intermediate output signal. These features are used in a file format and in a streaming format.

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