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1. 发明申请

WO2003046891A1 METHODS FOR IMPROVING HIGH FREQUENCY RECONSTRUCTION 审中-公开
标题翻译：改进高频重构的方法
公开(公告)号：WO2003046891A1
公开(公告)日：2003-06-05
申请号：PCT/EP2002/013462
申请日：2002-11-28
申请人： CODING TECHNOLOGIES SWEDEN AB , KJÖRLING, Kristofer , EKSTRAND, Per , HÖRICH, Holger
发明人： KJÖRLING, Kristofer , EKSTRAND, Per , HÖRICH, Holger
IPC分类号： G10L21/02
CPC分类号： G10L19/0208 , G10L19/0017 , G10L19/0204 , G10L19/028 , G10L19/06 , G10L19/07 , G10L19/093 , G10L19/167 , G10L19/24 , G10L19/26 , G10L19/265 , G10L21/038
摘要： The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilising high frequency reconstruction (HFR). It utilises a detection mechanism (703a) on the encoder side to assess what parts of the spectrum will not be correctly reproduced by the HFR method in the decoder. Information on this is efficiently coded (703b) and sent to the decoder, where it is combined with the output of the HFR unit.
摘要翻译：本发明提出了一种利用高频重构（HFR）来增强音频源编码系统的新方法和新装置。它利用编码器侧的检测机构（703a）来评估解码器中HFR方法将不能正确地再现频谱的哪些部分。关于此的信息被有效地编码（703b）并被发送到解码器，其中它与HFR单元的输出组合。

2. 发明申请

WO2005001813A1 APPARATUS AND METHOD FOR ENCODING AN AUDIO SIGNAL AND APPARATUS AND METHOD FOR DECODING AN ENCODED AUDIO SIGNAL 审中-公开
标题翻译：用于编码音频信号的装置和方法以及用于解码编码音频信号的装置和方法
公开(公告)号：WO2005001813A1
公开(公告)日：2005-01-06
申请号：PCT/EP2004/006850
申请日：2004-06-24
申请人： CODING TECHNOLOGIES AB , HÖRICH, Holger , SCHUG, Michael , NEUSINGER, Matthias
发明人： HÖRICH, Holger , SCHUG, Michael , NEUSINGER, Matthias
IPC分类号： G10L19/12
CPC分类号： G10L19/022 , G10L19/0212 , G10L19/24
摘要： When encoding an audio signal, the audio signal is first encoded with the first encoder (12) to obtain a first encoder output signal. This first encoder output signal is written into a bit stream. It is further decoded by a decoder (18) to provide a decoded audio signal. The decoded audio signal is compared (22) with the original audio signal to obtain a residual signal. The residual signal is then encoded via a second encoder (26) to provide a second encoder output signal which is also written into a bit stream (30). The first encoder has a first time or frequency resolution. The second encoder has a second time or frequency resolution. The first resolution differs from the second resolution, so that in a respective decoder, an au-dio signal with both a high time resolution as well as a high frequency resolution can be retrieved.
摘要翻译：当对音频信号进行编码时，首先利用第一编码器（12）对音频信号进行编码，以获得第一编码器输出信号。该第一编码器输出信号被写入位流。由解码器（18）进一步解码以提供解码的音频信号。将解码的音频信号与原始音频信号进行比较（22）以获得残留信号。然后，经由第二编码器（26）对剩余信号进行编码，以提供也被写入比特流（30）的第二编码器输出信号。第一个编码器具有第一次或频率分辨率。第二编码器具有第二时间或频率分辨率。第一分辨率与第二分辨率不同，因此在相应的解码器中，可以检索具有高时间分辨率以及高频分辨率的自动信号。

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