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    • 4. 发明授权
    • Method and apparatus for data encoding and data recording medium
    • 用于数据编码和数据记录介质的方法和设备
    • US5623557A
    • 1997-04-22
    • US413395
    • 1995-03-30
    • Osamu ShimoyoshiMito SonoharaKyoya Tsutsui
    • Osamu ShimoyoshiMito SonoharaKyoya Tsutsui
    • G11B20/10G10L19/00G10L19/02G11B20/00H03M7/30H03M7/40H04B1/66G06K9/00
    • H04B1/667G11B20/00007
    • A data encoding method apparatus in which the volume of arithmetic-logical operations for calculating the total number of bits required for encoding for adaptive bit allocation in the variable length encoding system for expediting the processing. In the data encoding apparatus for encoding and subsequently variable length encoding the input data, spectral data obtained on orthogonal transform coding are routed to a block floating circuit 403 for normalization and re-quantized in a quantization circuit 404 depending on the bit allocation number information from a bit allocation calculating circuit 406 so as to be then variable length encoded by an encoding circuit 407 and outputted at an output terminal 408. The bit allocation circuit 406 refers to a table memory circuit 409 in which re-quantized data domain is divided at boundary points corresponding to code length transitions in order to calculate the total number of bits required for encoding using a smaller volume of arithmetic-logical operations for the purpose of adjusting the number of allocated bits.
    • 一种数据编码方法装置,其中用于计算可变长度编码系统中的自适应位分配的编码所需的总位数的算术运算量用于加速处理。 在用于编码的数据编码装置和随后的可变长度编码输入数据中,在正交变换编码中获得的频谱数据被路由到块浮动电路403,以便在量化电路404中进行归一化和重新量化,这取决于来自 比特分配计算电路406,由编码电路407进行可变长度编码,并在输出端408输出。比特分配电路406参考其中重新量化的数据域被划分为边界的表存储器电路409 对应于代码长度转换的点,以便为了调整分配的位数而计算使用较小量的算术逻辑运算进行编码所需的总位数。
    • 5. 发明授权
    • Differential stereo using two coding techniques
    • 差分立体声使用两种编码技术
    • US06741965B1
    • 2004-05-25
    • US09202157
    • 1999-03-12
    • Osamu ShimoyoshiKyoya Tsutsui
    • Osamu ShimoyoshiKyoya Tsutsui
    • G10L1900
    • H04H20/88G10L19/008G11B20/10H04H40/72H04S1/007
    • A first audio signal is generated from a number of stereo input channels (such as a left and a right channel). A signal level that corresponds to one of the plurality of input channels and another signal level from another of the plurality of input channels are determined. A second audio signal is selected on the basis of the signal levels such that the second audio signal is selected from the group consisting of the one input channel, the other input channel, and a signal generated from the number of input channels that is different than the first audio signal. The first audio signal and the selected second audio signal are separately coded.
    • 从多个立体声输入声道(例如左声道和右声道)产生第一音频信号。 确定对应于多个输入通道之一的信号电平和来自多个输入通道中的另一个的另一个信号电平的信号电平。 基于信号电平选择第二音频信号,使得第二音频信号从由一个输入通道,另一个输入通道组成的组中选择,并且从输入通道的数量生成的信号不同于 第一个音频信号。 第一音频信号和所选择的第二音频信号被分别编码。
    • 6. 发明授权
    • Encoding method and apparatus, decoding method and apparatus and recording medium
    • 编码方法及装置,解码方法及装置及记录介质
    • US06169973A
    • 2001-01-02
    • US09048150
    • 1998-03-25
    • Kyoya TsutsuiOsamu Shimoyoshi
    • Kyoya TsutsuiOsamu Shimoyoshi
    • G10L1900
    • H04H20/88G11B20/00007G11B20/10527H04B1/665
    • An encoding method and apparatus and a decodings method and apparatus in which the encoded information is decreased in volume and in which the encoding and decoding operations are performed with a smaller processing volume and a smaller buffer memory capacity. The apparatus includes a low range signal splitting circuit for separating low-range side signal components from L and R channel signals converted by a transform circuit into spectral signal components, and a channel synthesis circuit for synthesizing (L+R) channel signal components from the L and R channel spectral signal components. The apparatus also includes a high range signal separating circuit for separating the high range side signal components from the (L+R) channel signal components, a signal component encoding circuit for compression-encoding low-range side signal components and a signal component encoding circuit for compression-encoding the normalization coefficient information obtained on normalization of the (L+R) channel high-range signal components.
    • 一种编码方法和解码方法和装置,其中编码信息的体积减小,并且以较小的处理量和较小的缓冲存储器容量执行编码和解码操作。 该装置包括用于将低范围侧信号分量与由变换电路转换的L信道信号分离成频谱信号分量的低范围信号分离电路,以及用于从(L + R)信道分量合成 L和R信道频谱信号分量。 该装置还包括用于从(L + R)信道信号分量分离高范围侧信号分量的高范围信号分离电路,用于压缩低范围侧信号分量的信号分量编码电路和信号分量编码电路 用于压缩编码在(L + R)信道高范围信号分量归一化时获得的归一化系数信息。
    • 8. 发明授权
    • Information encoding method and apparatus, information decoding method and apparatus and information recording medium
    • 信息编码方法和装置,信息解码方法以及装置和信息记录介质
    • US06314391B1
    • 2001-11-06
    • US09025593
    • 1998-02-18
    • Kyoya TsutsuiOsamu Shimoyoshi
    • Kyoya TsutsuiOsamu Shimoyoshi
    • G10L2104
    • H04B1/665
    • In case codes of old and new standards are recorded on the same recording medium, it is desirable that the signals of the old standard can be reproduced by an old standard accommodating reproducing device, while both signals can be reproduced by the new standard accommodating reproducing device such as to avoid lowering of the signal quality. To this end, if multi-channel signals are recorded in terms of a frame the size of which cannot be controlled, a second encoding circuit encodes signals of a channel reproduced by the old standard accommodating reproducing device, while a first encoding circuit encodes the signals of a channel reproduced by an old standard accommodating reproducing device with a number of bits smaller than the maximum number of bits that can be allocated to that frame. A codestring generating circuit arrays a codestring encoded by the second encoding circuit in a void area of a frame provided by encoding in the first encoding circuit.
    • 在旧标准和新标准的代码被记录在相同的记录介质上的情况下,希望旧标准的信号可以由旧的标准容纳再现装置再现,而两个信号可以被新的标准容纳再现装置 例如避免降低信号质量。 为此,如果以无法控制其大小的帧的方式记录多声道信号,则第二编码电路对由旧标准容纳再现装置再现的频道的信号进行编码,而第一编码电路对信号进行编码 由具有小于可以分配给该帧的最大位数的位数的旧标准容纳再现装置再现的频道。 代码串产生电路将由第二编码电路编码的代码串排列在通过第一编码电路中的编码提供的帧的空白区域中。
    • 10. 发明授权
    • High efficiency audio coding device and method therefore
    • 因此,高效率音频编码装置和方法
    • US5634082A
    • 1997-05-27
    • US443033
    • 1995-05-17
    • Osamu ShimoyoshiKyoya Tsutsui
    • Osamu ShimoyoshiKyoya Tsutsui
    • H03H17/02H03G7/00H03M7/30H03M7/36H04B1/66G10L3/02
    • H03G7/007H04B1/665H04B1/667
    • A high efficiency encoding audio signals is disclosed. The system includes a signal energy calculating circuit for calculating allowable noise energies by utilizing characteristics of human acoustic sense and calculating allowable noise energies of a block under consideration by weighted addition of the allowable noise energies calculated for at least one past block with respect to the block under consideration, a first-order allowable noise energy calculating unit, a second-order allowable noise energy calculating unit, a calculating circuit for calculating characteristics of human acoustic sense, and a memory. Adaptive quantization is performed in the quantization circuit with the bit allocation number which is based on the calculated allowable noise energies. Signals undergoing large temporal fluctuations can be encoded efficiently, while aurally outstanding noise may be reduced to improve the sound quality by eliminating sound quality deterioration known as pre-echo.
    • 公开了高效率编码音频信号。 该系统包括:信号能量计算电路,用于通过利用人体声学感测的特性来计算容许的噪声能量,并且通过对至少一个过去的块相对于块计算的可允许噪声能量的加权相加来计算所考虑的块的容许噪声能量 正在考虑的是一阶容许噪声能量计算单元,二阶可允许噪声能量计算单元,用于计算人体声学特性的计算电路和存储器。 在量化电路中以基于所计算的容许噪声能量的位分配数来执行自适应量化。 可以有效地对经历大时间波动的信号进行编码,同时可以通过消除被称为预回波的声音质量恶化来降低听觉突出的噪声,从而提高声音质量。