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1. 发明申请

WO2015038578A3 SYSTEM ASPECTS OF AN AUDIO CODEC 审中-公开
标题翻译：音频编解码器的系统方面
公开(公告)号：WO2015038578A3
公开(公告)日：2015-05-07
申请号：PCT/US2014054899
申请日：2014-09-10
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： GROESCHEL ALEXANDER , POPP JENNS , WOLTERS MARTIN , RIEDMILLER JEFFREY , WARD MICHAEL , ROEDEN KARL JONAS , HOERICH HOLGER , LINZMEIER KARSTEN , FRIEDRICH TOBIAS
IPC分类号： H03H17/02 , G10L19/008 , G10L19/16 , G10L25/18 , H03H17/04 , H04S3/02
CPC分类号： G10L19/24 , G10L19/005 , G10L19/008 , G10L19/167 , G10L25/18 , H03H17/0275 , H03H17/0277 , H03H17/0455 , H04S3/02 , H04S2400/03 , H04S2400/05
摘要： The present document relates to the design of anti-aliasing and/or anti-imaging filters for resamplers using rational resampling factors. In particular, the present document relates to a method for implementing such anti-aliasing and/or anti-imaging filters with reduced computational complexity. In addition, the present document relates to further aspects of an audio encoding and decoding system, such as the phase relation between the channels of a multi-channel audio signal and/or the structure of the bitstream of an encoded audio signal.
摘要翻译：本文件涉及使用合理的重采样因子设计用于重采样器的抗混叠和/或抗成像滤波器。特别地，本文件涉及用于实现具有降低的计算复杂度的这种抗混叠和/或抗成像滤波器的方法。另外，本文件涉及音频编码和解码系统的其它方面，诸如多声道音频信号的声道之间的相位关系和/或编码音频信号的比特流的结构。

2. 发明申请

WO2013068587A3 UPSAMPLING USING OVERSAMPLED SBR 审中-公开
标题翻译：使用超声波SBR进行UPSAMPLING
公开(公告)号：WO2013068587A3
公开(公告)日：2013-09-26
申请号：PCT/EP2012072395
申请日：2012-11-12
申请人： DOLBY INT AB
发明人： HOERICH HOLGER , FRIEDRICH TOBIAS
IPC分类号： G10L19/02
CPC分类号： G10L19/032 , G10L19/0204 , G10L19/167 , G10L19/24 , G10L19/265
摘要： An encoder (250) comprises a core encoder (252) for encoding a low frequency component of the audio signal at the signal sampling rate (fs_in) and a spectral band replication-referred to as SBR-encoding unit (153, 254) for determining a plurality of SBR parameters. A plurality of the SBR parameters is determined such that a high frequency component of the audio signal can be approximated based on the low frequency component of the audio signal and the plurality of SBR parameters. A multiplexer (155) is adapted to generate an overall bitstream comprising the core encoded bitstream, the plurality of SBR parameters and an indication of one or more SBR encoder settings applied by the SBR encoder (153, 254); wherein the generated overall bitstream does not indicate that the core encoded bitstream has been determined by encoding the low frequency component at the signal sampling rate (fs_in).
摘要翻译：编码器（250）包括用于以信号采样率（fs_in）对音频信号的低频分量进行编码的核心编码器（252）和被称为SBR编码单元（153,254）的频谱带复制，用于确定多个SBR参数。确定多个SBR参数，使得音频信号的高频分量可以基于音频信号的低频分量和多个SBR参数来近似。复用器（155）适于生成包括核心编码比特流，多个SBR参数和由SBR编码器（153,254）应用的一个或多个SBR编码器设置的指示的总比特流; 其中所生成的总比特流不指示通过以信号采样率（fs_in）对低频分量进行编码来确定核心编码比特流。

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