公开(公告)号：US09264094B2

公开(公告)日：2016-02-16

申请号：US14123841

申请日：2012-05-25

申请人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

发明人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

IPC分类号： G10L19/00 ,  H04B1/66 ,  G10L19/24 ,  G10L19/02 ,  G10L21/038

CPC分类号： H04B1/667 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/24 ,  G10L21/038

摘要： A voice coding device capable of preventing overall quality degradation even when the bit rate for coding is lowered. The voice coding device codes a wide band signal in a first layer, and codes an extended band signal whose frequency band is located in higher frequency than the wide band signal in an extended band layer. An adaptive band selection unit (301) selects a frequency band to be excluded from a coding object in the extended band layer or a frequency band whose energy is to be attenuated in the extended band layer. A band-limited signal generation unit (302) excludes, within the frequency band of an input signal, the frequency band selected by the adaptive band selection unit (301) from the coding object, or attenuates the energy of the frequency band selected by the adaptive band selection unit (301).

摘要翻译： 即使当编码的比特率降低时，能够防止整体质量劣化的语音编码装置。 语音编码装置对第一层中的宽带信号进行编码，并且对扩展频带信号进行编码，其频带位于比扩频带中的宽带信号更高的频带。 自适应频带选择单元（301）从扩展频带层中的编码对象或能量在扩展频带层中衰减的频带中选择要排除的频带。 频带限制信号生成单元（302）在输入信号的频带内从编码对象排除由自适应频带选择部（301）选择的频带，或者衰减由所述编码对象选择的频带的能量 自适应频带选择单元（301）。

公开(公告)号：US20140122065A1

公开(公告)日：2014-05-01

申请号：US14123841

申请日：2012-05-25

申请人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

发明人： Katsunori Daimou ,  Masahiro Oshikiri ,  Hiroyuki Ehara

IPC分类号： H04B1/66

CPC分类号： H04B1/667 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/24 ,  G10L21/038

摘要： A voice coding device capable of preventing overall quality degradation even when the bit rate for coding is lowered. The voice coding device codes a wide band signal in a first layer, and codes an extended band signal whose frequency band is located in higher frequency than the wide band signal in an extended band layer. An adaptive band selection unit (301) selects a frequency band to be excluded from a coding object in the extended band layer or a frequency band whose energy is to be attenuated in the extended band layer. A band-limited signal generation unit (302) excludes, within the frequency band of an input signal, the frequency band selected by the adaptive band selection unit (301) from the coding object, or attenuates the energy of the frequency band selected by the adaptive band selection unit (301).

摘要翻译： 即使当编码的比特率降低时，能够防止整体质量劣化的语音编码装置。 语音编码装置对第一层中的宽带信号进行编码，并且对扩展频带信号进行编码，其频带位于比扩频带中的宽带信号更高的频带。 自适应频带选择单元（301）从扩展频带层中的编码对象或能量在扩展频带层中衰减的频带中选择要排除的频带。 频带限制信号生成单元（302）在输入信号的频带内从编码对象排除由自适应频带选择部（301）选择的频带，或者衰减由所述编码对象选择的频带的能量 自适应频带选择单元（301）。

公开(公告)号：US20140200901A1

公开(公告)日：2014-07-17

申请号：US14238041

申请日：2012-08-24

申请人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

发明人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

IPC分类号： G10L19/26

CPC分类号： G10L19/265 ,  G10L19/0204 ,  G10L21/0388

摘要： By copying to a high-frequency band portion (extension band) a low-frequency band portion in which peaking has been set to a sufficiently low state, this encoding device is capable of preventing generation of a spectrum with overly high peaking in the high-frequency band portion, and of generating a high-quality extension band spectrum. This device comprises: a maximum value search unit which searches, in each of multiple sub-bands obtained by dividing the low-frequency band portion of an audio signal and/or music signal below a prescribed frequency, for the maximum value of the amplitude of a first spectrum obtained by decoding first encoded data, which is encoded data in the low-frequency band portion; and an amplitude normalization unit which obtains a normalized spectrum by normalizing, at the maximum values of the amplitude of each sub-band, the first spectrum contained in each sub-band.

摘要翻译： 通过将峰值设定为足够低的低频区域的低频带部分（扩展频带）复制到该高频带部分（扩展频带），该编码装置能够防止高频带部分 频带部分，并且产生高质量的扩展频带。 该装置包括：最大值搜索单元，其在通过将音频信号的低频带部分和/或音频信号低于规定频率的下划线获得的多个子带中搜索最大值的幅度的最大值 通过对作为低频带部分中的编码数据的第一编码数据进行解码而获得的第一频谱; 以及振幅归一化单元，其通过在每个子带的振幅的最大值处归一化包含在每个子带中的第一频谱来获得归一化频谱。

公开(公告)号：US09384749B2

公开(公告)日：2016-07-05

申请号：US14238041

申请日：2012-08-24

申请人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

发明人： Takuya Kawashima ,  Katsunori Daimou ,  Masahiro Oshikiri

IPC分类号： G10L21/0388 ,  G10L19/26 ,  G10L19/02

CPC分类号： G10L19/265 ,  G10L19/0204 ,  G10L21/0388

摘要： By copying to a high-frequency band portion (extension band) a low-frequency band portion in which peaking has been set to a sufficiently low state, this encoding device is capable of preventing generation of a spectrum with overly high peaking in the high-frequency band portion, and of generating a high-quality extension band spectrum. This device comprises: a maximum value search unit which searches, in each of multiple sub-bands obtained by dividing the low-frequency band portion of an audio signal and/or music signal below a prescribed frequency, for the maximum value of the amplitude of a first spectrum obtained by decoding first encoded data, which is encoded data in the low-frequency band portion; and an amplitude normalization unit which obtains a normalized spectrum by normalizing, at the maximum values of the amplitude of each sub-band, the first spectrum contained in each sub-band.

摘要翻译： 通过将峰值设定为足够低的低频区域的高频带部分（扩展频带）复制，能够防止在高频带部分 频带部分，并且产生高质量的扩展频带。 该装置包括：最大值搜索单元，其在通过将音频信号的低频带部分和/或音频信号低于规定频率的下划线获得的多个子带中搜索最大值的幅度的最大值 通过对作为低频带部分中的编码数据的第一编码数据进行解码而获得的第一频谱; 以及振幅归一化单元，其通过在每个子带的振幅的最大值处归一化包含在每个子带中的第一频谱来获得归一化频谱。