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公开(公告)号：US08108222B2
公开(公告)日：2012-01-31
申请号：US12836900
申请日：2010-07-15
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L21/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译： 一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据 频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。
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公开(公告)号：US07783496B2
公开(公告)日：2010-08-24
申请号：US12370203
申请日：2009-02-12
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L21/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译： 一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据 频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。
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公开(公告)号：US07509254B2
公开(公告)日：2009-03-24
申请号：US11508915
申请日：2006-08-24
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译： 一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据 频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。
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公开(公告)号：US20060287853A1
公开(公告)日：2006-12-21
申请号：US11508915
申请日：2006-08-24
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译： 一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据 频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。
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公开(公告)号：US06484142B1
公开(公告)日：2002-11-19
申请号：US09551796
申请日：2000-04-18
IPC分类号： G10L1914
CPC分类号： H03M7/42
摘要： An encoder of the present invention includes: G storage sections for storing G groups of data; a selection section for selecting one of H Huffman codebooks having codebook numbers for each of the groups of data; G encoding sections Huffman-encoding the G groups of data by using the selected Huffman codebook; and an encoding section for encoding the codebook number of each Huffman codebook selected. The selection section includes a calculation section for calculating a code length and a control section for selecting one of the Huffman codebooks. When the Huffman codebook selected is an unsigned codebook, a number of bits required for sign information has previously been added to the calculated code length.
摘要翻译： 本发明的编码器包括：G存储部分，用于存储G组数据; 选择部分，用于选择具有每组数据的码本号码的霍夫曼代码簿之一; G编码部分通过使用所选的霍夫曼码本对G组数据进行霍夫曼编码; 以及编码部，用于编码所选择的每个霍夫曼码本的码本号。 选择部分包括用于计算代码长度的计算部分和用于选择霍夫曼码本之一的控制部分。 当选择的霍夫曼代码簿是无符号码本时，已经将计算的代码长度添加到符号信息所需的位数。
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公开(公告)号：US07283967B2
公开(公告)日：2007-10-16
申请号：US10285609
申请日：2002-11-01
申请人： Kosuke Nishio , Mineo Tsushima , Naoya Tanaka , Takeshi Norimatsu
发明人： Kosuke Nishio , Mineo Tsushima , Naoya Tanaka , Takeshi Norimatsu
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/0208
摘要： An encoding device (100) includes (i) a first encoding unit (132) that encodes spectral data in the lower frequency band represented by a plularity of parameters, out of the spectral data obtained by transforming an audio signal inputted for a fixed time length, (ii) a second quantizing unit (133) that generates sub information representing characteristics of the spectral data in the higher frequency by fewer parameters than those for the lower frequency band, out of the spectral data obtained by the transformation, (iii) a second encoding unit (134) that encodes the generated sub information, and (iv) a stream output unit (140) that outputs the data encoded by the first encoding unit (132) and the data encoded by the second encoding unit (134).
摘要翻译： 一种编码装置（100）包括：（i）第一编码单元（132），其通过将输入的固定时间长度的音频信号变换得到的频谱数据中编码由参数的多样性表示的较低频带中的频谱数据 ，（ii）第二量化单元（133），通过变换获得的频谱数据，产生表示较低频带的频谱数据的频谱数据的特性的子信息，（iii） 编码所生成的子信息的第二编码单元（134），以及（iv）输出由第一编码单元（132）编码的数据和由第二编码单元（134）编码的数据的流输出单元（140）。
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公开(公告)号：US07246065B2
公开(公告)日：2007-07-17
申请号：US10353019
申请日：2003-01-29
申请人： Naoya Tanaka , Mineo Tsushima , Takeshi Norimatsu
发明人： Naoya Tanaka , Mineo Tsushima , Takeshi Norimatsu
摘要： An encoding device (200) is comprised of a band dividing unit (201) that divides an input signal (207) into a low frequency signal (208) representing a signal in the lower frequency band and a high frequency signal (209) representing a signal in the higher frequency band, a lower frequency band encoding unit (202) that encodes the low frequency signal (208) and generates a low frequency code (213), a similarity judging unit (203) that judges similarity between the high frequency signal (209) and the low frequency signal (208) and generates switching information (210), “n” higher frequency band encoding units 205 that encode the high frequency signal (209) through respective encoding methods and generate a high frequency code (212), a switching unit (204) that selects one of the higher frequency band encoding units (205) and has the selected higher frequency band encoding unit (205) perform encoding, and a code multiplexing unit (206) that multiplexes the low frequency code (213), the high frequency code (212) and the switching information (210), and generates an output code (214).
摘要翻译： 编码装置（200）由将输入信号（207）分割为表示较低频带的信号的低频信号（208）的频带划分单元（201）和表示低频信号的高频信号 信号，较低频率编码单元（202），编码低频信号（208）并产生低频码（213）;相似度判断单元（203），其判断高频信号 （209）和低频信号（208），并且通过各种编码方法产生切换信息（210）“n”个编码高频信号（209）的较高频带编码单元205，并生成高频码（212） ，选择所述较高频带编码单元（205）之一并具有所选择的较高频带编码单元（205）进行编码的切换单元（204），以及多路复用 低频码（213），高频码（212）和切换信息（210），并产生输出码（214）。
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公开(公告)号：US07243061B2
公开(公告)日：2007-07-10
申请号：US10954589
申请日：2004-10-01
IPC分类号： G10L19/02
CPC分类号： G10L19/032 , G10L19/0212 , G10L19/038
摘要： With respect to audio signal coding and decoding apparatuses, there is provided a coding apparatus that enables a decoding apparatus to reproduce an audio signal even through it does not use all of data from the coding apparatus, and a decoding apparatus corresponding to the coding apparatus. A quantization unit constituting a coding apparatus includes a first sub-quantization unit comprising sub-quantization units for low-band, intermediate-band, and high-band; a second sub-quantization unit for quantizing quantization errors from the first sub-quantization unit; and a third sub-quantization unit for quantizing quantization errors which have been processed by the first sub-quantization unit and the second sub-quantization unit.
摘要翻译： 对于音频信号编码和解码装置，提供了一种编码装置，即使通过编码装置不使用全部数据，能够使解码装置再现音频信号，也可以使用与编码装置对应的解码装置。 构成编码装置的量化单元包括：第一子量化单元，包括用于低频带，中频带和高频带的子量化单元; 第二子量化单元，用于量化来自第一子量化单元的量化误差; 以及用于量化由第一子量化单元和第二子量化单元处理的量化误差的第三子量化单元。
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9.发明授权AUDIO SIGNAL CODING METHOD, DECODING METHOD, AUDIO SIGNAL CODING APPARATUS, AND DECODING APPARATUS WHERE FIRST VECTOR QUANTIZATION IS PERFORMED ON A SIGNAL AND SECOND VECTOR QUANTIZATION IS PERFORMED ON AN ERROR COMPONENT RESULTING FROM THE FIRST VECTOR QUANTIZATION 有权音频信号编码方法，解码方法，音频信号编码装置和解码装置，其中第一个矢量量化在信号上执行，第二矢量量化在由第一矢量量化得到的错误组件上执行公开(公告)号：US06826526B1
公开(公告)日：2004-11-30
申请号：US09171266
申请日：1999-07-23
IPC分类号： G10L1900
CPC分类号： G10L19/038 , G10L2019/0005
摘要： A coding unit codes an audio signal by using a vector quantization method to reduce the quantity of data. An audio code having a minimum distance among auditive distances between sub-vectors produced by dividing an input vector and audio codes in a transmission-side code book is selected. A portion corresponding to an element of a sub-vector having a high auditive importance is handled in an audio code selecting unit while neglecting the codes indicating phase information and subjected to comparative retrieval with respect to audio codes in a transmission-side code book. Extracted phase information corresponding to an element portion of the sub-vector is added to the result obtained and output as a code index. Thereby, the calculation amount in the code retrieval of vector quantization and the number of codes in the code book are decreased without lowering the quality of an audio signal.
摘要翻译： 编码单元通过使用矢量量化方法对音频信号进行编码以减少数据量。 选择具有通过划分输入向量和发送侧码本中的音频码产生的子向量之间的听觉距离之间的最小距离的音频码。 在音频代码选择单元中处理对应于具有高听觉重要性的子向量的元素的部分，同时忽略指示相位信息的代码，并且对发送侧代码簿中的音频代码进行比较检索。 对应于子向量的元素部分的提取相位信息被添加到获得的结果并作为代码索引输出。 由此，在不降低音频信号的质量的情况下，减少矢量量化的代码检索和码本中的代码数量的计算量。
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10.发明授权Apparatus and method for coding audio data at high speed using precision information 有权使用精密信息高速编码音频数据的装置和方法公开(公告)号：US06678653B1
公开(公告)日：2004-01-13
申请号：US09657461
申请日：2000-09-07
IPC分类号： G10L1902
CPC分类号： G10L19/035 , G10L19/0204
摘要： An audio signal is converted from time domain into frequency conversion signal, and is coded at high speed. In order that the frequency information decoded by using the quantizing data may not be zero when the frequency conversion signal is quantized, the guarantee value K(B) of the quantizing precision is calculated. The relative quantizing precision SF(B) in each band and the quantizing precision information Com common to all bands are determined, and final quantizing precision information ASF(B) are calculated by these values, and the frequency conversion signal is quantized in the quantizing unit. Thus, it is possible to quantize by a single quantizing loop, only on the restricting condition of assuring the minimum quantizing information.
摘要翻译： 音频信号从时域转换为变频信号，并以高速编码。 为了使量化数据解码的频率信息在变频信号被量化时可能不为零，计算量化精度的保证值K（B）。 确定每个频带中的相对量化精度SF（B）和所有频带共同的量化精度信息Com，并且通过这些值计算最终量化精度信息ASF（B），并且在量化单元中量化频率转换信号 。 因此，只有在确保最小量化信息的限制条件下，可以通过单个量化循环来量化。
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