公开(公告)号：US09076438B2

公开(公告)日：2015-07-07

申请号：US13329481

申请日：2011-12-19

申请人： Tsung-Han Tsai ,  Yu-Jie Sha

发明人： Tsung-Han Tsai ,  Yu-Jie Sha

IPC分类号： G10L19/00 ,  G10L19/02 ,  G10L19/008 ,  G10L19/035 ,  G10L19/12 ,  H04B1/66

CPC分类号： G10L19/0204 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/035 ,  G10L19/12 ,  H04B1/665

摘要： An audio processing method is disclosed. In the audio processing method, a modified discrete cosine transform (MDCT) algorithm is utilized to transform a present time domain audio signal into a spectrum audio signal. A spreading function (SF) coefficient of each partition domain of the spectrum audio signal is obtained by referencing an SF table, wherein the table is stored in three linear arrays based on non-zero SF-Coefficient values. A masking partitioned energy threshold of each partition domain of the spectrum audio signal is calculated utilizing a logarithmic scale. An audio block type of each partition domain and an SMR of the spectrum audio signal are calculated. Subsequently, the spectrum audio signal is compressed into an audio bit stream according to the audio block type of each partition domain and the SMR. In addition, an audio signal processing apparatus is also disclosed in this invention.

摘要翻译： 公开了音频处理方法。 在音频处理方法中，利用修正离散余弦变换（MDCT）算法将当前时域音频信号变换为频谱音频信号。 通过参考SF表获得频谱音频信号的每个分区域的扩展函数（SF）系数，其中基于非零SF系数值将表存储在三个线性阵列中。 使用对数标度来计算频谱音频信号的每个分区域的掩蔽分区能量阈值。 计算每个分区域的音频块类型和频谱音频信号的SMR。 随后，根据每个分区域和SMR的音频块类型，将频谱音频信号压缩成音频比特流。 此外，在本发明中还公开了音频信号处理装置。

公开(公告)号：US20130054252A1

公开(公告)日：2013-02-28

申请号：US13329481

申请日：2011-12-19

申请人： Tsung-Han Tsai ,  Yu-Jie Sha

发明人： Tsung-Han Tsai ,  Yu-Jie Sha

IPC分类号： G10L19/00

CPC分类号： G10L19/0204 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/035 ,  G10L19/12 ,  H04B1/665

摘要： An audio processing method is disclosed. In the audio processing method, a modified discrete cosine transform (MDCT) algorithm is utilized to transform a present time domain audio signal into a spectrum audio signal. A spreading function (SF) coefficient of each partition domain of the spectrum audio signal is obtained by referencing an SF table. A masking partitioned energy threshold of each partition domain of the spectrum audio signal is calculated utilizing a logarithmic scale. An audio block type of each partition domain and an SMR of the spectrum audio signal are calculated. Subsequently, the spectrum audio signal is compressed into an audio bit stream according to the audio block type of each partition domain and the SMR. In addition, an audio signal processing apparatus is also disclosed in this invention.

摘要翻译： 公开了音频处理方法。 在音频处理方法中，利用修正离散余弦变换（MDCT）算法将当前时域音频信号变换为频谱音频信号。 通过参考SF表来获得频谱音频信号的每个分区域的扩展函数（SF）系数。 使用对数标度来计算频谱音频信号的每个分区域的掩蔽分区能量阈值。 计算每个分区域的音频块类型和频谱音频信号的SMR。 随后，根据每个分区域和SMR的音频块类型，将频谱音频信号压缩成音频比特流。 此外，在本发明中还公开了音频信号处理装置。