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1.发明公开
公开(公告)号：EP4325488A3
公开(公告)日：2024-05-15
申请号：EP23219897.8
申请日：2015-02-06
发明人： KAWASHIMA, Takuya , EHARA, Hiroyuki
IPC分类号： G10L19/028 , G10L19/02 , G10L21/038
CPC分类号： G10L19/028
摘要： A decoding device according to the present disclosure is a decoding device (100) that decodes core encoded data where a low-band spectrum of a predetermined frequency or lower has been encoded, and extended band encoded data where a high-band spectrum of a predetermined frequency or higher has been encoded based on core encoded data. The decoding device includes: an amplitude normalization unit (103) that normalizes the amplitude of the core decoded spectrum, obtained by decoding the core encoded data, by the largest value of the amplitude of the core decoded spectrum, and generates a normalized spectrum; a noise generating unit (104) that generates a noise spectrum; a first addition unit (105) that adds the noise spectrum to the normalized spectrum and generates a noise-added normalized spectrum; and an extended band decoding unit (106) that decodes the extended band encoded data using the noise-added normalized spectrum, and generates a noise-added extended band spectrum.
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公开(公告)号：EP3413307B1
公开(公告)日：2020-07-15
申请号：EP18186595.7
申请日：2015-07-03
发明人： KAWASHIMA, Takuya , EHARA, Hiroyuki
IPC分类号： G10L19/02 , G10L19/002 , G10L19/032 , G10L19/035
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公开(公告)号：EP3321931A1
公开(公告)日：2018-05-16
申请号：EP17209671.1
申请日：2012-10-12
IPC分类号： G10L19/02 , H03M7/30 , G10L21/0388
CPC分类号： G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L21/0388 , G10L25/06 , H05K999/99
摘要： Provided is an encoding apparatus. A threshold value calculating unit (32) calculates a threshold value from a statistical amount of conversion factors of an extended band. A representative conversion factor extracting unit (33) uses the calculated threshold value to extract conversion factors having large amplitudes. If the number of extracted conversion factors does not reach a specified number, the threshold value calculating unit (32) determines, in accordance with a lacking number of conversion factors, an amount by which the threshold value should be lowered, and modifies the threshold value accordingly. The representative conversion factor extracting unit (33) uses the threshold value, which has been modified, to extract conversion factors. Such threshold value modification by the threshold value difference calculating unit (32) and such conversion factor extraction by the representative conversion factor extracting unit (33) are repeated until the number of extracted conversion factors reaches the specified number.
摘要翻译： 提供了一种编码设备。 阈值计算单元（32）根据扩展频带的统计量的转换因子来计算阈值。 代表性转换因子提取单元（33）使用所计算的阈值来提取具有大振幅的转换因子。 如果所提取的转换因子的数量未达到指定数量，则阈值计算单元（32）根据缺少的转换因子数量来确定阈值应该被降低的量，并且修改阈值 因此。 代表性转换系数提取单元（33）使用已经被修改的阈值来提取转换系数。 重复由阈值差异计算单元（32）进行的这种阈值修改和由代表性转换因子提取单元（33）提取的这种转换因子，直到提取的转换因子的数量达到指定数量。
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公开(公告)号：EP2772913B1
公开(公告)日：2018-02-14
申请号：EP12843823.1
申请日：2012-10-12
IPC分类号： G10L19/02 , H03M7/30 , G10L21/0388
CPC分类号： G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L21/0388 , G10L25/06 , H05K999/99
摘要： Provided is an encoding apparatus. A threshold value calculating unit (32) calculates a threshold value from a statistical amount of conversion factors of an extended band. A representative conversion factor extracting unit (33) uses the calculated threshold value to extract conversion factors having large amplitudes. If the number of extracted conversion factors does not reach a specified number, the threshold value calculating unit (32) determines, in accordance with a lacking number of conversion factors, an amount by which the threshold value should be lowered, and modifies the threshold value accordingly. The representative conversion factor extracting unit (33) uses the threshold value, which has been modified, to extract conversion factors. Such threshold value modification by the threshold value difference calculating unit (32) and such conversion factor extraction by the representative conversion factor extracting unit (33) are repeated until the number of extracted conversion factors reaches the specified number.
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5.发明公开
公开(公告)号：EP4325488A2
公开(公告)日：2024-02-21
申请号：EP23219897.8
申请日：2015-02-06
发明人： KAWASHIMA, Takuya , EHARA, Hiroyuki
IPC分类号： G10L21/038
摘要： A decoding device according to the present disclosure is a decoding device (100) that decodes core encoded data where a low-band spectrum of a predetermined frequency or lower has been encoded, and extended band encoded data where a high-band spectrum of a predetermined frequency or higher has been encoded based on core encoded data. The decoding device includes: an amplitude normalization unit (103) that normalizes the amplitude of the core decoded spectrum, obtained by decoding the core encoded data, by the largest value of the amplitude of the core decoded spectrum, and generates a normalized spectrum; a noise generating unit (104) that generates a noise spectrum; a first addition unit (105) that adds the noise spectrum to the normalized spectrum and generates a noise-added normalized spectrum; and an extended band decoding unit (106) that decodes the extended band encoded data using the noise-added normalized spectrum, and generates a noise-added extended band spectrum.
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公开(公告)号：EP3413307A1
公开(公告)日：2018-12-12
申请号：EP18186595.7
申请日：2015-07-03
发明人： KAWASHIMA, Takuya , EHARA, Hiroyuki
IPC分类号： G10L19/02 , G10L19/002 , G10L19/032 , G10L19/035
摘要： An audio signal coding apparatus (100) includes a time-frequency transformer (101) that outputs sub-band spectra from an input signal, a sub-band energy quantizer (102), a tonality calculator (103) that analyzes tonality of the sub-band spectra, a bit allocator (104) that selects a second sub-band on which quantization is performed by a second quantizer on the basis of the analysis result of the tonality and quantized sub-band energy, and determines a first number of bits to be allocated to a first sub-band on which quantization is performed by a first quantizer, the first quantizer (106) that performs coding using the first number of bits, the second quantizer (107) that performs coding using a pitch filter, and a multiplexer (108).
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公开(公告)号：EP3174050B1
公开(公告)日：2018-11-14
申请号：EP15824312.1
申请日：2015-07-03
发明人： KAWASHIMA, Takuya , EHARA, Hiroyuki
IPC分类号： G10L19/02 , G10L19/002 , G10L19/032 , G10L19/035
CPC分类号： G10L19/002 , G10L19/0204 , G10L19/0208 , G10L19/032 , G10L19/035
摘要： An audio signal coding apparatus (100) includes a time-frequency transformer (101) that outputs sub-band spectra from an input signal, a sub-band energy quantizer (102), a tonality calculator (103) that analyzes tonality of the sub-band spectra, a bit allocator (104) that selects a second sub-band on which quantization is performed by a second quantizer on the basis of the analysis result of the tonality and quantized sub-band energy, and determines a first number of bits to be allocated to a first sub-band on which quantization is performed by a first quantizer, the first quantizer (106) that performs coding using the first number of bits, the second quantizer (107) that performs coding using a pitch filter, and a multiplexer (108).
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公开(公告)号：EP3624119A1
公开(公告)日：2020-03-18
申请号：EP19205679.4
申请日：2012-10-12
IPC分类号： G10L21/0388 , G10L19/02 , H03M7/30
摘要： Provided is an encoding apparatus. A threshold value calculating unit (32) calculates a threshold value from a statistical amount of conversion factors of an extended band. A representative conversion factor extracting unit (33) uses the calculated threshold value to extract conversion factors having large amplitudes. If the number of extracted conversion factors does not reach a specified number, the threshold value calculating unit (32) determines, in accordance with a lacking number of conversion factors, an amount by which the threshold value should be lowered, and modifies the threshold value accordingly. The representative conversion factor extracting unit (33) uses the threshold value, which has been modified, to extract conversion factors. Such threshold value modification by the threshold value difference calculating unit (32) and such conversion factor extraction by the representative conversion factor extracting unit (33) are repeated until the number of extracted conversion factors reaches the specified number.
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