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    • 1. 发明专利
    • Encoding method, encoder, decoding method and decoder
    • 编码方法,编码器,解码方法和解码器
    • JP2006080927A
    • 2006-03-23
    • JP2004263126
    • 2004-09-09
    • Toa CorpTokyo Kogei Univティーオーエー株式会社学校法人東京工芸大学
    • KANEKO ITARUMIYATA SATORU
    • H03M7/40G10L19/00H03M7/30
    • PROBLEM TO BE SOLVED: To provide an encoding method for maintaining high quality while preventing a delay.
      SOLUTION: An MDCT counting analyzer 115 acquires a scale factor number and a mantissa number from an MDCT coefficient being an output of the MDCT converter 110. A scale factor analyzer 125 calculates differential data for each segment between a current block (n) and a preceding block (n) on the basis of the scale factor number acquired by the MDCT counting analyzer 115 and acquires scale factor number differential data. A high-speed arithmetic encoder 140 divides values that scale factor number differential data within one block can take into two sections, repeats processing for applying high-speed arithmetic encoding to the scale factor number differential data on the basis of a frequency at which values included in the respective sections are generated, divides values that mantissa numbers within one block can take into two sections and repeats processing for applying high-speed arithmetic encoding to the mantissa numbers with the scale factor number as a parameter on the basis of the frequency at which values included in the respective sections are generated.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种在防止延迟的同时保持高质量的编码方法。 解决方案:MDCT计数分析器115从作为MDCT转换器110的输出的MDCT系数获取比例因子数和尾数。比例因子分析器125计算当前块(n) 和基于由MDCT计数分析器115获取的比例因子数的前一块(n),并获取比例因子数差分数据。 高速算术编码器140将一个块内的比例因子数差分数据分成两部分的值,重复根据包括的值的频率对比例因子数差分数据应用高速算术编码的处理 在生成各个部分时,将一个块内的尾数编号的值分成两部分,并且基于其频率来重复用缩放因子数作为参数将高速算术编码应用于尾数的处理 生成包含在各个部分中的值。 版权所有(C)2006,JPO&NCIPI
    • 2. 发明专利
    • Method and device for encoding digital data
    • 用于编码数字数据的方法和设备
    • JP2004180057A
    • 2004-06-24
    • JP2002344963
    • 2002-11-28
    • Itaru KanekoToa Corpティーオーエー株式会社格 金子
    • KANEKO ITARUMIYATA SATORU
    • H03M7/30H03M7/36
    • PROBLEM TO BE SOLVED: To provide a digital data encoding method and a digital data encoding device which raise the compression rate when transmitting/storing digital data and faithfully restore the original signals.
      SOLUTION: The digital data encoding method includes a step of performing modified discrete cosine transform MDCT processing for each input data having a prescribed-time area as one frame, a step of quantizing an MDCT coefficient group into the prescribed number of bits, a step of performing arithmetic encoding of a quantized MDCT coefficient group, a step of performing inverse modified discrete cosine transform IMDCT processing for the quantized MDCT coefficient group, a step of calculating the difference between input data and IMDCT output data, a step of performing arithmetic encoding of difference data on the basis of second probability density functions, and a step of outputting output data based on encoded output data and encoded difference data. The original signals can be faithfully restored by using this difference data, and the quality of digital data can be kept high, and a high compression rate is realized by arithmetic encoding the output data and difference data to allow the data size to be reduced.
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:提供一种数字数据编码方法和数字数据编码装置,其在发送/存储数字数据时提高压缩率并忠实地恢复原始信号。 解决方案:数字数据编码方法包括对具有规定时间区域的每个输入数据作为一帧执行修正的离散余弦变换MDCT处理的步骤,将MDCT系数组量化为规定位数的步骤, 执行量化MDCT系数组的算术编码的步骤,对量化的MDCT系数组执行逆修正的离散余弦变换IMDCT处理的步骤,计算输入数据和IMDCT输出数据之间的差的步骤,执行算术的步骤 基于第二概率密度函数对差分数据进行编码,以及基于编码的输出数据和编码差分数据输出输出数据的步骤。 可以通过使用该差分数据忠实地恢复原始信号,并且数字数据的质量可以保持较高,并且通过对输出数据和差分数据进行算术编码来实现高压缩率,以允许数据大小减小。 版权所有(C)2004,JPO
    • 3. 发明专利
    • Encoder, encoding method, decoder, and decoding method
    • 编码器,编码方法,解码器和解码方法
    • JP2006235253A
    • 2006-09-07
    • JP2005050005
    • 2005-02-25
    • Toa Corpティーオーエー株式会社
    • MIYATA SATORU
    • G10L19/02H03M7/30H03M7/40
    • PROBLEM TO BE SOLVED: To provide an encoder capable of performing an encoding processing while keeping sound quality excellent.
      SOLUTION: A bit allocation section sets the target number X+a of bits larger than the desired number X of bits and determines bit allocation so that the number of bits is less than the target number X+a of bits (refer step S30a). Then a comparison section 21 compares the number of bits of a generated frame with the desired number X of bits (refer step S30b). Here, when the number of bits of the generated frame is less than the desired number X of bits, a difference encoder outputs difference encoded data based upon the current bit allocation to a bit stream generation section (refer step S30d). When the number of bits of the generated frame is larger than the desired number of bits, the bit allocation section repeatedly sets the target number X+b of bits larger than the desired number X of bits and determines bit allocation (refer steps S30e and S30f).
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 解决的问题:提供能够进行编码处理同时保持音质优异的编码器。 解决方案:比特分配部分设置比目标数目X的比特大的比特的目标号码X + a,并确定比特分配,使比特数小于比特的目标号码X + a(参考步骤 S30A)。 然后,比较部21将生成的帧的位数与期望的X位数进行比较(参照步骤S30b)。 这里,当所生成的帧的比特数小于期望的比特数X时,差分编码器根据当前比特分配向比特流生成部分输出差分编码数据(参照步骤S30d)。 当所生成的帧的比特数大于期望的比特数时,比特分配部分重复地设置比希望的比特数X更大的比特的目标号码X + b,并确定比特分配(参照步骤S30e和S30f )。 版权所有(C)2006,JPO&NCIPI
    • 4. 发明专利
    • Network device
    • 网络设备
    • JP2011130145A
    • 2011-06-30
    • JP2009286096
    • 2009-12-17
    • Toa Corpティーオーエー株式会社
    • MIYATA SATORUSUZUKI AKIHIRO
    • H04B3/23H04M3/00
    • PROBLEM TO BE SOLVED: To remove an echo component in one's opposing party over a digital network. SOLUTION: A multi-interface unit 12 is connected to an IP door terminal unit 16 via the digital network 20. At the side of the terminal unit 16, output sound of a speaker 24 is input into a microphone 26, and hence an echo component is generated. In this case, a sound signal x or y transmitted and received between the unit 12 and the terminal unit 16 is delayed by six buffers 30, 50, 52, 54, 34 and 36. An adaptive filter 32 performs adaptive operation, based on only a specified part after a lapse of prescribed time when delay time by the buffers 30, 50, 52, 54, 34 and 36 is considered, in the sound signal x input to the adaptive filter 32. Thus, echoes are canceled over the digital network 20 from the unit 12 to the terminal unit 16. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:通过数字网络去除对方的回波分量。 解决方案:多接口单元12经由数字网络20连接到IP门终端单元16.在终端单元16侧,扬声器24的输出声音被输入到麦克风26中,因此 产生回波分量。 在这种情况下,在单元12和终端单元16之间发送和接收的声音信号x或y被延迟六个缓冲器30,50,52,54,34和36.自适应滤波器32仅基于自适应滤波器 在输入到自适应滤波器32的声音信号x中考虑了缓冲器30,50,52,54,34和36的延迟时间经过规定时间之后的指定部分。因此,通过数字网络消除回波 20从单元12到终端单元16.版权所有(C)2011,JPO&INPIT
    • 5. 发明专利
    • Identification device and identification method
    • 识别装置和识别方法
    • JP2010181635A
    • 2010-08-19
    • JP2009025095
    • 2009-02-05
    • Toa Corpティーオーエー株式会社
    • FUJII KENSAKUMIYATA SATORU
    • G10K15/00H03H17/02H03H21/00H04R1/40H04R3/00
    • PROBLEM TO BE SOLVED: To accurately identify a mutual transfer function from one to another receiving means of two receiving means in a system in which a signal emitted by one signal source is received by two different receiving means via two different paths. SOLUTION: Sound S(z) emitted from a sound source 16 as a signal source is received by two microphones A and B as two receiving means. A path from one to the other, of the two microphones A and B has a sound transfer function hab(z), and the sound transfer function hab(z) is identified by a finite impulse response (FIR) adaptive filter 50 and an infinite impulse response (IIR) adaptive filter 52, which are cascade-connected. In this way, by using the FIR adaptive filter 50 and the IIR adaptive filter 52, which are cascade-connected, as means for identifying the sound transfer function hab(z), the sound transfer function hab(z) is accurately identified. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了在由两个不同的接收装置通过两个不同的路径接收由一个信号源发射的信号的系统中,从两个接收装置之间准确地识别相互传递函数的两个接收装置的接收装置。 解决方案:作为信号源从声源16发出的声音S(z)由两个麦克风A和B作为两个接收装置接收。 两个麦克风A和B之间的路径彼此之间具有声音传递函数hab(z),声音传递函数hab(z)由有限脉冲响应(FIR)自适应滤波器50和无穷大 脉冲响应(IIR)自适应滤波器52,它们是级联的。 以这种方式,通过使用级联连接的FIR自适应滤波器50和IIR自适应滤波器52作为用于识别声音传递函数hab(z)的装置,可以准确地识别声音传递函数hab(z)。 版权所有(C)2010,JPO&INPIT
    • 6. 发明专利
    • Method and device for encoding digital data
    • JP2004180058A
    • 2004-06-24
    • JP2002344964
    • 2002-11-28
    • Itaru KanekoToa Corpティーオーエー株式会社格 金子
    • KANEKO ITARUMIYATA SATORU
    • H03M7/30H03M7/40
    • PROBLEM TO BE SOLVED: To provide a digital data encoding method and a digital data encoding device which raise a compression rate when transmitting/storing digital data and faithfully restore the original signals.
      SOLUTION: The digital data encoding method is provided with a means which executes modified discrete cosine transform processing, uniform quantization, and non-uniform quantization based on auditory psychological analysis to input data and arithmetically encoding the processing result to generate encoded output data E1 and performing arithmetic encoding to the difference data generated by the non-uniform quantization processing to generate first encoded difference data E2 and performing arithmetic encoding of the difference data generated by the uniform quantization processing to generate second encoded difference data E3 and synthesizing the encoded output data E1, the first encoded difference data E2, the second encoded difference data E3 and outputting the result. The original signals can be faithfully restored by using this difference data, and the quality of digital data can be kept high, and a high compression rate is realized by arithmetic encoding processing of output data and difference data to allow the data size to be reduced.
      COPYRIGHT: (C)2004,JPO
    • 7. 发明专利
    • Loudspeaker system
    • 扬声器系统
    • JP2013081096A
    • 2013-05-02
    • JP2011220351
    • 2011-10-04
    • Toa CorpToa株式会社
    • KUBOTA YUJIMIYATA SATORUYODA KOJI
    • H04R3/12H04R1/40H04R27/00
    • PROBLEM TO BE SOLVED: To provide a loudspeaker system enabling easy setting of the directivity of a plurality of line array speakers.SOLUTION: A loudspeaker system 100 includes a plurality of line array speakers 20 and a directivity controller 10 for controlling the directivity of the line array speakers 20. The directivity controller 10 includes: delay time control means for generating speaker drive signals by controlling delay times to an identical voice input signal; and a plurality of amplifiers for amplifying the speaker drive signals to output to mutually different transmission lines. The line array speakers 20 include a plurality of built-in speakers 21 arranged substantially linearly. The speaker drive signals generated in the delay time control means are respectively output to different transmission lines. Through an identical transmission line, an identical speaker drive signal is input to the plurality of built-in speakers 21 belonging to mutually different line array speakers 20 via an identical transmission line.
    • 要解决的问题:提供一种能够容易地设定多个线阵列扬声器的方向性的扬声器系统。 解决方案:扬声器系统100包括多个线阵列扬声器20和用于控制线阵列扬声器20的方向性的方向性控制器10.方向性控制器10包括:延迟时间控制装置,用于通过控制来产生扬声器驱动信号 延迟时间到相同的语音输入信号; 以及用于放大扬声器驱动信号以输出到相互不同的传输线的多个放大器。 线阵列扬声器20包括基本上线性地布置的多个内置扬声器21。 在延迟时间控制装置中产生的扬声器驱动信号分别输出到不同的传输线。 通过相同的传输线,相同的扬声器驱动信号通过相同的传输线输入到属于相互不同的线阵列扬声器20的多个内置扬声器21。 版权所有(C)2013,JPO&INPIT