-
公开(公告)号：EP1851752A1
公开(公告)日：2007-11-07
申请号：EP06710801.9
申请日：2006-02-01
发明人： SZCZERBA, Marek , DEN BRINKER, Albertus, C. , GERRITS, Andreas, J. , OOMEN, Arnoldus, W., J. , KLEIN MIDDELINK, Marc
IPC分类号： G10H7/00
CPC分类号： G10H7/00 , G10H1/22 , G10H2230/041 , G10H2250/495
摘要： A device (1) is arranged for synthesizing sound represented by sets of parameters, each set comprising noise parameters (NP) representing noise components of the sound and optionally also other parameters representing other components, such as transients and sinusoids. Each set of parameters may correspond with a sound channel, such as a MIDI voice. In order to reduce the computational load, the device comprises a selection unit (2) for selecting a limited number of sets from the total number of sets on the basis of a perceptual relevance value, such as the amplitude or energy. The device further comprises a synthesizing unit (3) for synthesizing the noise components using the noise parameters of the selected sets only.
-
公开(公告)号：EP1466320A1
公开(公告)日：2004-10-13
申请号：EP02781516.6
申请日：2002-11-13
IPC分类号： G10L19/14
CPC分类号： G10L19/022
摘要： Coding a signal is provided, wherein a first set of values is provided related to subsequent times in a first time interval of the signal, a second set of values is provided related to subsequent times in a second time interval of the signal, the first time interval having an overlap with the second time interval, the overlap including at least two subsequent times of the second interval, wherein at least one of the values of the second set related to the at least two subsequent times in the overlap is encoded with reference to a value of the first set which is closer in time to the at least one value of the second set than any other value in the second set.
-
公开(公告)号：EP1451809A1
公开(公告)日：2004-09-01
申请号：EP02779819.8
申请日：2002-11-04
CPC分类号： G10L19/012 , G11B20/24
摘要： A method using synthetic noise sources in a multi-channel audio coding system for encoding a set of audio signals wherein correlated noise components are present. The method comprises the step of determining, from the relation between said audio signals, a composition of noise sources, the composition being such that the noise sources in said composition are mutually uncorrelated, so that said composition of noise sources synthesizes said noise components in a relation-preserved way. The method may further comprise the step of encoding the noise sources, by determining for each noise source a set of noise parameters for synthesizing said source and a set of transformation parameters for generating said composition of noise sources.
-
公开(公告)号：EP1125282A1
公开(公告)日：2001-08-22
申请号：EP00960515.5
申请日：2000-08-24
IPC分类号： G10L19/02
CPC分类号： G10L19/0208
摘要： In a sinusoidal audio encoder it is known to use different time scales for analyzing different parts of the frequency spectrum. In prior art encoders sub-band filtering is used to split the input signal into a number of sub bands. By splitting the input signal into sub-bands, it can happen that a signal component at the boundary of two sub-bands results in a representation in both sub-band signals. This double representation of signal components can lead to several problems when coding these components. According to the present invention it is proposed to use preventing means (46, 48, 58, 68; 88, 92, 96) to avoid signal components to have multiple representations.
-
公开(公告)号：EP2422344A1
公开(公告)日：2012-02-29
申请号：EP10717280.1
申请日：2010-04-14
发明人： SCHUIJERS, Erik, G., P. , OOMEN, Arnoldus, W., J. , DE BONT, Fransiscus, M., J. , OSTROVSKYY, Mykola , RIJNBERG, Adriaan, J. , KOPPENS, Jeroen, G., H.
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04R5/033 , H04S2400/01 , H04S2420/01 , H04S2420/03
摘要： An audio synthesizing apparatus receives an encoded signal comprising a downmix signal and parametric extension data for expanding the downmix signal to a multi-sound source signal. A decomposition processor (205) performs a signal decomposition of the downmix signal to generate at least a first signal component and a second signal component, where the second signal component is at least partially decorrelated with the first signal component. A position processor (207) determines a first spatial position indication for the first signal component in response to the parametric extension data and a binaural processor (211) synthesizes the first signal component based on the first spatial position indication and the second signal component to originate from a different direction. The invention may provide improved spatial experience from e.g. headphones by using a direct synthesis of a main directional signal from the appropriate position rather than as a combination of signals from virtual loudspeaker positions.
摘要翻译： 音频合成装置接收包括下混合信号和参数扩展数据的编码信号，用于将下混合信号扩展成多声源信号。 分解处理器（205）执行下混合信号的信号分解以生成至少第一信号分量和第二信号分量，其中第二信号分量至少部分地与第一信号分量解相关。 位置处理器（207）响应于参数扩展数据确定第一信号分量的第一空间位置指示，并且双耳处理器（211）基于第一空间位置指示和第二信号分量合成第一信号分量以发起 从不同的方向。 本发明可以提供改进的空间体验，例如， 通过使用来自适当位置的主方向信号的直接合成而不是来自虚拟扬声器位置的信号的组合。
-
公开(公告)号：EP2406789A1
公开(公告)日：2012-01-18
申请号：EP10710645.2
申请日：2010-03-05
CPC分类号： G11B20/00086 , G11B20/00884
摘要： The invention proposes a method for embedding an ancillary data into a compressed audio signal. This is achieved by replacing Least Significant Bits (LSBs) in at least one frequency subband of the compressed audio signal by the ancillary data. When replacing LSB bits of compressed subband signals with the ancillary data, the subband signal is effectively modified, resulting in a different decoded output. The replaced LSB bits corresponding to the ancillary data are conveyed as part of the bitstream and can be easily extracted at the decoder. In such a way the decoder obtains the ancillary data that can be used for more advanced audio reproduction at the decoder. The compressed audio itself maintains a good audio quality despite the replacement of the LSB bits of the frequency subband, because the LSB bits do not contribute to the audible artefacts.
-
公开(公告)号：EP2396977A2
公开(公告)日：2011-12-21
申请号：EP10706748.0
申请日：2010-02-09
IPC分类号： H04S7/00
CPC分类号： H04S7/304
摘要： A head tracking system that determines a rotation angle of a head of a user with respect to a reference direction, dependent on a movement of a user including changes of place, position, and/or posture. The head tracking system includes a sensing device for measuring a head movement to provide a measure representing the head movement, and a processing circuit for deriving the rotation angle of the head of the user with respect to the reference direction from the measure. The reference direction is dependent on the movement of the user.
摘要翻译： 在本发明中提出了一种头部跟踪系统（400），其确定用户（100）的头部（100b）相对于参考方向（310）的旋转角度（300），该参考方向取决于 一个用户（100）。 这里，用户的移动应该被理解为包括例如移动的行为或过程。 地点，位置或姿势的变化，例如， 躺下或坐在放松椅上。 根据本发明的头部追踪系统包括用于测量头部移动以提供表示头部移动的量度（401）的传感装置（410），以及用于导出用户头部的旋转角度的处理电路（420） 关于该措施的参考方向。 处理电路（420）中使用的参考方向（310）取决于用户的移动。 使参考方向（310）取决于用户的移动的优点在于确定头部（100b）的旋转角度（300）独立于环境，即不固定于环境。 因此，无论何时用户（100）是例如 在移动中和他的身体部位经历运动时，参考方向适应这种运动。
-
公开(公告)号：EP1866913B1
公开(公告)日：2008-08-27
申请号：EP06727674.1
申请日：2006-03-16
IPC分类号： G10L19/00
CPC分类号： G10L19/008
-
公开(公告)号：EP1815462A1
公开(公告)日：2007-08-08
申请号：EP05798851.1
申请日：2005-11-03
发明人： DEN BRINKER, Albertus, C. , RIERA PALOU, Felipe , OOMEN, Arnoldus, W., J. , RAULT, Jean-Bernard, H., M. , VIRETTE, David, S. T. , PHILIPPE, Pierrick, J.-L. M.
IPC分类号： G10L19/08
CPC分类号： G10L19/16 , G10L19/0204 , G10L19/08
摘要： An audio encoding device (100) comprises first encoding means (101, 111) for encoding transient signal components and/or sinusoidal signal components of an audio signal (x(n)) and producing a residual signal (z(n)), and second encoding means for encoding the residual signal. The second encoding means comprise filter means (122) for selecting at least two frequency bands of the residual signal. The selected frequency bands (LF, HF) of the residual signal (z(n)) are encoded by a first encoding unit (123) and a second encoding unit (124) respectively. The first encoding unit (123) may comprise a waveform encoder, such as a time-domain encoder, while the second encoding unit (124) may comprise a noise encoder.
摘要翻译： 音频编码设备（100）包括用于编码音频信号（x（n））的瞬态信号分量和/或正弦信号分量并产生残余信号（z（n））的第一编码装置（101,111），以及 第二编码装置，用于编码残差信号。 第二编码装置包括用于选择剩余信号的至少两个频带的滤波器装置（122）。 第一编码单元（123）和第二编码单元（124）分别对残差信号（z（n））的选定频带（LF，HF）进行编码。 第一编码单元（123）可以包括诸如时域编码器的波形编码器，而第二编码单元（124）可以包括噪声编码器。
-
公开(公告)号：EP1719117A1
公开(公告)日：2006-11-08
申请号：EP05702839.1
申请日：2005-01-31
CPC分类号： G10L19/008 , G10L19/173 , G10L21/038
摘要： A transcoder comprises a receiver (101) which receives input data representing an encoded signal and comprising first encoding data and first parametric extension data. The encoded data is fed to a decoder (103). The output of the decoder (103) is fed to an encoder (105) which generates second encoded data according to a different encoding protocol or with different encoding parameters. The first parametric extension data is fed to an extension data processor (109) which generates second parametric extension data directly from the first parametric extension data. The second encoded data and the second parametric extension data is combined in an output processor (107) to generate a transcoded signal comprising separately determined parametric extension data. The parametric extension data may be Spectral Band Replication (SBR) or Parametric Stereo (PS) extension data for an audio bitstream. Improved quality and reduced complexity is achieved by the separate transcoding of the parametric extension data.
-
-
-
-
-
-
-
-
-
搜索结果
52 条记录 (耗时 0.017 秒)
