公开(公告)号：US08311815B2

公开(公告)日：2012-11-13

申请号：US12502797

申请日：2009-07-14

申请人： Takehiro Moriya ,  Akio Jin ,  Kazunaga Ikeda ,  Takeshi Mori

发明人： Takehiro Moriya ,  Akio Jin ,  Kazunaga Ikeda ,  Takeshi Mori

IPC分类号： G10L21/02

CPC分类号： G10L19/0017 ,  G10L19/00

摘要： A down sampler 13 down samples a digital signal in the sampling frequency thereof from 96 kHz to 48 kHz on a frame-by-frame basis. The converted signal is compression encoded and output as a main code Im. An up sampler 16 converts a partial signal corresponding to the main code Im to a signal having the original sampling frequency 96 kHz, for example. An error signal between the up sampled signal and an input digital signal is generated. An array converting and encoding unit 18 array converts bits of sample chains of the error signal, thereby outputting an error code Pe. On a decoding side, a high fidelity reproduced signal is obtained based on the main code Im and the error code Pe, or a reproduced signal is obtained based on the main code Im only.

摘要翻译： 下采样器13在逐帧的基础上将其采样频率中的数字信号从96kHz下降到48kHz。 转换的信号被压缩编码并作为主要代码Im输出。 例如，上采样器16将对应于主码Im的部分信号转换为具有原始采样频率96kHz的信号。 产生上采样信号和输入数字信号之间的误差信号。 阵列转换和编码单元18对误差信号的采样链的位进行转换，从而输出错误代码Pe。 在解码侧，基于主码Im和错误代码Pe获得高保真再现信号，或者仅基于主码Im获得再现信号。

公开(公告)号：US20090279598A1

公开(公告)日：2009-11-12

申请号：US12502797

申请日：2009-07-14

申请人： Takehiro Moriya ,  Akio Jin ,  Kazunaga Ikeda ,  Takeshi Mori

发明人： Takehiro Moriya ,  Akio Jin ,  Kazunaga Ikeda ,  Takeshi Mori

IPC分类号： H04B1/66

CPC分类号： G10L19/0017 ,  G10L19/00

摘要： A down sampler 13 down samples a digital signal in the sampling frequency thereof from 96 kHz to 48 kHz on a frame-by-frame basis. The converted signal is compression encoded and output as a main code Im. An up sampler 16 converts a partial signal corresponding to the main code Im to a signal having the original sampling frequency 96 kHz, for example. An error signal between the up sampled signal and an input digital signal is generated. An array converting and encoding unit 18 array converts bits of sample chains of the error signal, thereby outputting an error code Pe. On a decoding side, a high fidelity reproduced signal is obtained based on the main code Im and the error code Pe, or a reproduced signal is obtained based on the main code Im only.

摘要翻译： 下采样器13在逐帧的基础上将其采样频率中的数字信号从96kHz下降到48kHz。 转换的信号被压缩编码并作为主要代码Im输出。 例如，上采样器16将对应于主码Im的部分信号转换为具有原始采样频率96kHz的信号。 产生上采样信号和输入数字信号之间的误差信号。 阵列转换和编码单元18对误差信号的采样链的位进行转换，从而输出错误代码Pe。 在解码侧，基于主码Im和错误代码Pe获得高保真再现信号，或者仅基于主码Im获得再现信号。

公开(公告)号：US06549147B1

公开(公告)日：2003-04-15

申请号：US09572789

申请日：2000-05-17

申请人： Takehiro Moriya ,  Naoki Iwakami ,  Akio Jin ,  Takeshi Mori ,  Kazuaki Chikira

发明人： Takehiro Moriya ,  Naoki Iwakami ,  Akio Jin ,  Takeshi Mori ,  Kazuaki Chikira

IPC分类号： H03M700

CPC分类号： H04N19/00 ,  H03M7/30 ,  H04N19/90

摘要： An object of the invention is to provide a method for compressing digital input signals at high compression efficiency and reproducing the input data perfectly. The method includes the steps of: converting a digital input signal in each frame to bitstreams according to a sign-magnitude format; deblocking the bitstreams into individual bits; joining each bit in a time sequence while retaining an identical chronological order of bits in all the frames; and reversibly encoding each bitstream obtained by joining the bits. And, the reversible decoding method includes the steps of: reversibly decoding a reversible code sequence in each frame; deblocking the bitstreams obtained by reversible decoding into individual bits; joining each bit in a time sequence while retaining an identical chronological order of bits in all the frames; and joining successive frames obtained by joining the bits.

摘要翻译： 本发明的目的是提供一种以高压缩效率压缩数字输入信号并且完美地再现输入数据的方法。 该方法包括以下步骤：根据符号幅度格式将每帧中的数字输入信号转换为比特流; 将比特流解块为单独的比特; 以时间顺序连接每个比特，同时保留所有帧中相同的时间顺序的比特; 并且可逆地编码通过连接比特获得的每个比特流。 并且，可逆解码方法包括以下步骤：对每帧中的可逆码序列进行可逆解码; 将通过可逆解码获得的比特流解块为单独的比特; 以时间顺序连接每个比特，同时保留所有帧中相同的时间顺序的比特; 并连接通过连接比特获得的连续帧。

公开(公告)号：US07200561B2

公开(公告)日：2007-04-03

申请号：US10226138

申请日：2002-08-23

申请人： Takehiro Moriya ,  Akio Jin ,  Takeshi Mori ,  Kazunaga Ikeda

发明人： Takehiro Moriya ,  Akio Jin ,  Takeshi Mori ,  Kazunaga Ikeda

IPC分类号： G10L21/00

CPC分类号： H03M7/30 ,  G10L19/0017 ,  H04N19/895

摘要： At the coder side, bits of samples of each frame of an input digital signal are concatenated every digit common to the samples across each frame to generate equi-order bit sequences, which are output as packets. At the decoding side, the input equi-order sequences are arranged inversely to their arrangement at the coder side to reconstruct sample sequences. When a packet dropout occurs, a missing information compensating part 430 correct the reconstructed sample sequences in a manner to reduce an error between the spectral envelope of the reconstructed sample sequence concerned and a known spectral envelope.

摘要翻译： 在编码器侧，输入数字信号的每一帧的采样位被连接在每个帧上的采样公共的每个数字上，以产生作为分组输出的等位比特序列。 在解码侧，输入的等序序列与编码器侧的排列相反地排列，以重建采样序列。 当发生分组丢失时，丢失信息补偿部分430以减少相关重建样本序列的频谱包络和已知频谱包络之间的误差的方式校正重建的采样序列。

公开(公告)号：US07145484B2

公开(公告)日：2006-12-05

申请号：US10535708

申请日：2003-11-20

申请人： Takehiro Moriya ,  Noboru Harada ,  Akio Jin ,  Kazunaga Ikeda

发明人： Takehiro Moriya ,  Noboru Harada ,  Akio Jin ,  Kazunaga Ikeda

IPC分类号： H03M7/30

CPC分类号： G10L19/04 ,  G10L19/097

摘要： A sample sequence ΔS similar to a first or last sample sequence of the current frame is extracted from its samples SFC and concatenated, as an alternative sample sequence AS, to each of the front and back of the current frame, and the current frame with the alternative sample sequence concatenated thereto is subjected to filtering or prediction coding to obtain processing result SOU of the current frame. In the case of prediction coding, auxiliary information, which indicates which part of the current frame was used as the alternative sample sequence, is also output. By this, filtering, autoregressive prediction coding and decoding, which require processing extending over preceding and succeeding frames as in an interpolation filter, can be concluded in the current frame with substantially no degradation of the continuity and coding efficient of the reconstructed signal.

摘要翻译： 从其样本S FC提取类似于当前帧的第一或最后一个样本序列的样本序列DeltaS作为替代样本序列AS，并入到当前帧的前后的每一个 帧，并且将其中连接有替代采样序列的当前帧进行滤波或预测编码，以获得当前帧的处理结果S OU。 在预测编码的情况下，也输出指示当前帧的哪一部分被用作替代样本序列的辅助信息。 由此，可以在当前帧中得出如在内插滤波器中要求在前一帧和后一帧之上扩展的处理的滤波，自回归预测编码和解码，其中重建信号的连续性和编码效率基本上不降低。

公开(公告)号：US07126501B2

公开(公告)日：2006-10-24

申请号：US10550527

申请日：2004-04-27

申请人： Takehiro Moriya ,  Dai Yang ,  Akio Jin ,  Kazunaga Ikeda

发明人： Takehiro Moriya ,  Dai Yang ,  Akio Jin ,  Kazunaga Ikeda

IPC分类号： H03M7/00

CPC分类号： H03M7/30 ,  G10L19/0017 ,  H03M7/24

摘要： Digital signal samples X in a floating-point format, each of which is composed of 1 bit of sign, 8 bits of exponent E and 23 bits of mantissa M, are converted through rounding by an integer formatting part 12 into digital signal samples Y in an integer format, the sequence of the digital signal samples Y is losslessly compression-coded by a compressing part 13 into a code sequence Ca, and the code sequence Ca is output. The digital signal samples Y are converted by a floating point formatting part 15 into digital signal samples X′ in the floating-point format, a difference signal ΔX indicating the difference between the digital signal sample X′ and the digital signal sample X is determined by a subtraction part 16, the difference signal ΔX is losslessly coded, and the resulting code sequence Cb is output.

摘要翻译： 浮点格式的数字信号样本X由1位符号，8位指数E和23位尾数M组成，通过整数格式化部分12的舍入转换为数字信号样本Y中的数字信号样本Y 整数格式，数字信号样本Y的序列被压缩部分13无损压缩编码为代码序列Ca，并输出代码序列Ca。 数字信号样本Y由浮点格式化部分15转换成浮点格式的数字信号样本X'，表示数字信号样本X'和数字信号样本X之间的差的差分信号DeltaX由 减法部分16，差信号DeltaX被无损编码，并且产生所得到的代码序列Cb。

公开(公告)号：US06658382B1

公开(公告)日：2003-12-02

申请号：US09534297

申请日：2000-03-23

申请人： Naoki Iwakami ,  Takehiro Moriya ,  Akio Jin ,  Kazuaki Chikira ,  Takeshi Mori

发明人： Naoki Iwakami ,  Takehiro Moriya ,  Akio Jin ,  Kazuaki Chikira ,  Takeshi Mori

IPC分类号： G10L1902

CPC分类号： G10L19/0212

摘要： An input signal is time-frequency transformed, then the frequency-domain coefficients are divided into coefficient segments of about 100 Hz width to generate a sequence of coefficient segments, and the sequence of coefficient segments is split into subbands each consisting of plural coefficient segments. A threshold value is determined based on the intensity of each coefficient segment in each subband. The intensity of each coefficient segment is compared with the threshold value, and the coefficient segments are classified into low- and high-intensity groups. The coefficient segments are quantized for each group, or they are flattened respectively and then quantized through recombination.

摘要翻译： 输入信号被时间频率变换，频域系数被划分为大约100Hz宽度的系数段，以产生一系列系数段，并将系数段序列分成各个由多个系数段组成的子带。 基于每个子带中的每个系数段的强度来确定阈值。 将每个系数段的强度与阈值进行比较，将系数段分为低强度组和高强度组。 每个组对系数段进行量化，或者分别对其进行平坦化，然后通过重组进行量化。

公开(公告)号：US20060181436A1

公开(公告)日：2006-08-17

申请号：US10550527

申请日：2004-04-27

申请人： Takehiro Moriya ,  Dai Yang ,  Akio Jin ,  Kazunaga Ikeda

发明人： Takehiro Moriya ,  Dai Yang ,  Akio Jin ,  Kazunaga Ikeda

IPC分类号： H03M7/00

CPC分类号： H03M7/30 ,  G10L19/0017 ,  H03M7/24

摘要： Digital signal samples X in a floating-point format, each of which is composed of 1 bit of sign, 8 bits of exponent E and 23 bits of mantissa M, are converted through rounding by an integer formatting part 12 into digital signal samples Y in an integer format, the sequence of the digital signal samples Y is losslessly compression-coded by a compressing part 13 into a code sequence Ca, and the code sequence Ca is output. The digital signal samples Y are converted by a floating point formatting part 15 into digital signal samples X′ in the floating-point format, a difference signal ΔX indicating the difference between the digital signal sample X′ and the digital signal sample X is determined by a subtraction part 16, the difference signal ΔX is losslessly coded, and the resulting code sequence Cb is output.

公开(公告)号：US20060087464A1

公开(公告)日：2006-04-27

申请号：US10535708

申请日：2003-11-20

申请人： Takehiro Moriya ,  Noboru Harada ,  Akio Jin ,  Kazunaga Ikeda

发明人： Takehiro Moriya ,  Noboru Harada ,  Akio Jin ,  Kazunaga Ikeda

IPC分类号： H03M1/66

CPC分类号： G10L19/04 ,  G10L19/097

摘要： A sample sequence ΔS similar to a first or last sample sequence of the current frame is extracted from its samples SFC and concatenated, as an alternative sample sequence AS, to each of the front and back of the current frame, and the current frame with the alternative sample sequence concatenated thereto is subjected to filtering or prediction coding to obtain processing result SOU of the current frame. In the case of prediction coding, auxiliary information, which indicates which part of the current frame was used as the alternative sample sequence, is also output. By this, filtering, autoregressive prediction coding and decoding, which require processing extending over preceding and succeeding frames as in an interpolation filter, can be concluded in the current frame with substantially no degradation of the continuity and coding efficient of the reconstructed signal.

摘要翻译： 从其样本S FC提取类似于当前帧的第一或最后一个样本序列的样本序列DeltaS作为替代样本序列AS，并入到当前帧的前后的每一个 帧，并且将其中连接有替代采样序列的当前帧进行滤波或预测编码，以获得当前帧的处理结果S OU。 在预测编码的情况下，也输出指示当前帧的哪一部分被用作替代样本序列的辅助信息。 由此，可以在当前帧中得出如在内插滤波器中要求在前一帧和后一帧之上扩展的处理的滤波，自回归预测编码和解码，其中重建信号的连续性和编码效率基本上不降低。

公开(公告)号：US20050091051A1

公开(公告)日：2005-04-28

申请号：US10505485

申请日：2003-03-10

申请人： Takehiro Moriya ,  Akio Jin ,  Kazunaga Ikeda ,  Takeshi Mori

发明人： Takehiro Moriya ,  Akio Jin ,  Kazunaga Ikeda ,  Takeshi Mori

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/0017 ,  G10L19/00

摘要： A down sampler 13 down samples a digital signal in the sampling frequency thereof from 96 kHz to 48 kHz on a frame-by-frame basis. The converted signal is compression encoded and output as a main code Im. An up sampler 16 converts a partial signal corresponding to the main code Im to a signal having the original sampling frequency 96 kHz, for example. An error signal between the up sampled signal and an input digital signal is generated. An array converting and encoding unit 18 array converts bits of sample chains of the error signal, thereby outputting an error code Pe. On a decoding side, a high fidelity reproduced signal is obtained based on the main code Im and the error code Pe, or a reproduced signal is obtained based on the main code Im only.

摘要翻译： 下采样器13在逐帧的基础上将其采样频率中的数字信号从96kHz下降到48kHz。 转换的信号被压缩编码并作为主要代码Im输出。 例如，上采样器16将对应于主码Im的部分信号转换为具有原始采样频率96kHz的信号。 产生上采样信号和输入数字信号之间的误差信号。 阵列转换和编码单元18对误差信号的采样链的位进行转换，从而输出错误代码Pe。 在解码侧，基于主码Im和错误代码Pe获得高保真再现信号，或者仅基于主码Im获得再现信号。