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1. 再颁专利

USRE44897E1 Process of low sampling rate digital encoding of audio signals 有权
标题翻译：音频信号低采样率数字编码过程
公开(公告)号：USRE44897E1
公开(公告)日：2014-05-13
申请号：US13897221
申请日：2013-05-17
申请人： Oliver Kunz , Martin Dietz , Rainer Buchta , Jurgen Zeller , Karlheinz Brandenburg , Martin Sieler , Heinz Gerhauser
发明人： Oliver Kunz , Martin Dietz , Rainer Buchta , Jurgen Zeller , Karlheinz Brandenburg , Martin Sieler , Heinz Gerhauser
IPC分类号： H04B1/66
摘要： In a method for coding an audio signal digitized at a low sampling rate to obtain time domain audio samples. A frequency domain representation of the time domain audio samples is produced. The frequency domain representation includes successive frequency lines. These frequency lines are grouped into a plurality of scale factor bands. The successive frequency lines in a scale factor band are coded with the same scale factor. A plurality of regions is formed by grouping the scale factor bands, wherein successive scale factor bands form a region within which all the scale factors are coded with the same number of bits, which is determined according to the largest scale factor of the region. The scale factors assigned to scale factor bands within the highest region that includes the higher frequency successive frequency lines are set to zero. The frequency lines in the highest region are coded using the zero-valued scale factors that correspond to a multiplication factor of 1. The scale factors for the highest region, however, are not coded. Thus, the bits that would be required for coding these zero-valued scale factors are saved and can be used for a finer quantization of the rest of the spectrum. Additionally, this coding method when applied to ISO/IEC 13818-3 as a low sampling rate modification thereof only requires minimal changes with respect to this Standard.
摘要翻译：在以低采样率对数字化的音频信号进行编码以获得时域音频样本的方法中，产生时域音频样本的频域表示。频域表示包括连续的频率线。这些频率线被分组成多个比例因子频带。缩放因子带中的连续频率线以相同的比例因子进行编码。通过对比例因子频带进行分组来形成多个区域，其中，连续的比例因子波段形成一个区域，在该区域内，所有比例因子都以相同的比特数进行编码，这是根据该区域的最大比例因子确定的。分配给包括较高频率的连续频率线的最高区域内的比例因子频带的比例因子被设置为零。最高区域中的频率线使用与乘法因子1对应的零值比例因子进行编码。然而，最高区域的比例因子未被编码。因此，编码这些零值比例因子所需的位被保存，并且可以用于其余频谱的更精细的量化。此外，当将其应用于ISO / IEC 13818-3作为其低采样率修改时，该编码方法仅需要相对于本标准的最小变化。

2. 发明授权

US06185539B2 Process of low sampling rate digital encoding of audio signals 失效
标题翻译：音频信号低采样率数字编码过程
公开(公告)号：US06185539B2
公开(公告)日：2001-02-06
申请号：US09077395
申请日：1998-05-26
申请人： Oliver Kunz , Martin Dietz , Rainer Buchta , Jürgen Zeller , Karlheinz Brandenburg , Martin Sieler , Heinz Gerhäuser
发明人： Oliver Kunz , Martin Dietz , Rainer Buchta , Jürgen Zeller , Karlheinz Brandenburg , Martin Sieler , Heinz Gerhäuser
IPC分类号： H04B166
CPC分类号： H04B1/665
摘要： In a method for coding an audio signal digitized at a low sampling rate to obtain time domain audio samples. A frequency domain representation of the time domain audio samples is produced. The frequency domain representation includes successive frequency lines. These frequency lines are grouped into a plurality of scale factor bands. The successive frequency lines in a scale factor band are coded with the same scale factor. A plurality of regions is formed by grouping the scale factor bands, wherein successive scale factor bands form a region within which all the scale factors are coded with the same number of bits, which is determined according to the largest scale factor of the region. The scale factors assigned to scale factor bands within the highest region that includes the higher frequency successive frequency lines are set to zero. The frequency lines in the highest region are coded using the zero-valued scale factors that correspond to a multiplication factor of 1. The scale factors for the highest region, however, are not coded. Thus, the bits that would be required for coding these zero-valued scale factors are saved and can be used for a finer quantization of the rest of the spectrum. Additionally, this coding method when applied to ISO/IEC 13818-3 as a low sampling rate modification thereof only requires minimal changes with respect to this Standard.
摘要翻译：在以低采样率对数字化的音频信号进行编码以获得时域音频样本的方法中，产生时域音频样本的频域表示。频域表示包括连续的频率线。这些频率线被分组成多个比例因子频带。缩放因子带中的连续频率线以相同的比例因子进行编码。通过对比例因子频带进行分组来形成多个区域，其中，连续的比例因子波段形成一个区域，在该区域内，所有比例因子都以相同的比特数进行编码，这是根据该区域的最大比例因子确定的。分配给包括较高频率的连续频率线的最高区域内的比例因子频带的比例因子被设置为零。最高区域中的频率线使用与乘法因子1对应的零值比例因子进行编码。然而，最高区域的比例因子未被编码。因此，编码这些零值比例因子所需的位被保存，并且可以用于其余频谱的更精细的量化。此外，当将其应用于ISO / IEC 13818-3作为其低采样率修改时，该编码方法仅需要相对于本标准的最小变化。

3. 发明授权

US06421802B1 Method for masking defects in a stream of audio data 有权
标题翻译：用于掩蔽音频数据流中的缺陷的方法
公开(公告)号：US06421802B1
公开(公告)日：2002-07-16
申请号：US09331697
申请日：1999-06-23
申请人： Wolfgang Schildbach , Jürgen Herre , Martin Sieler , Karlheinz Brandenburg , Heinz Gerhäuser
发明人： Wolfgang Schildbach , Jürgen Herre , Martin Sieler , Karlheinz Brandenburg , Heinz Gerhäuser
IPC分类号： G10L1900
CPC分类号： G11B20/1876 , G10L19/005 , G11B20/00992 , H04H60/11
摘要： In a method for concealing errors in an audio data stream the occurrence of an error is detected in the audio data stream, audio data prior to the occurrence of the fault being intact audio data. Thereafter a spectral energy of a subgroup of the intact audio data is calculated. After forming a pattern for substitute data on the basis of the spectral energy calculated for the subgroup of the intact audio data, substitute data for erroneous or missing audio data which correspond to the subgroup are created on the basis of the pattern.
摘要翻译：在用于隐藏音频数据流中的错误的方法中，在音频数据流中检测到错误的发生，在发生故障之前的音频数据是完整的音频数据。此后，计算完整音频数据的子组的频谱能量。基于为完整音频数据的子组计算的频谱能量形成用于替代数据的模式之后，基于该模式创建与该子组对应的错误或缺失音频数据的替代数据。

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