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    • 24. 发明授权
    • Optimal source distribution
    • 最优源分布
    • US06950524B2
    • 2005-09-27
    • US10312224
    • 2001-06-22
    • Philip Arthur NelsonTakashi Takeuchi
    • Philip Arthur NelsonTakashi Takeuchi
    • H04R5/02H04S1/00H04R5/00H03G5/00H04R29/00
    • H04S5/00H04R1/26H04R2205/024H04S3/002H04S2400/05H04S2420/01
    • A sound reproduction system has pairs of sound emitters that subtend different angles Θ, the span angle, at the listener position. The pairs of sound emitters are arranged to be excited by different frequency bands of the signal output from an inverse filter means (Hh, Hl). The operational span-frequency range of the pairs of sound emitters is determined by an equation (I) where the transducer span Θ is the angle subtended at the listener by a pair of transducers, where O
    • 声音再现系统具有对声音发射器,它们对应于收听者位置处的不同角度Theta,跨度角度。 发声器对被布置成由反向滤波器装置(H H h H 1,H L 1)输出的信号的不同频带激发。 发声器对的操作跨度频率范围由等式(I)确定,其中换能器跨度Theta是由一对换能器对准在倾听者处的角度,其中O :是声速,Deltar:是耳朵之间的等效距离。 声音发射器可以是分立的扬声器单元,不同的单元对定位在不同的跨度角,或者它们由扩展换能器的区域部分(图10)构成。 当使用离散扬声器单元时,使用交叉滤波器(图28)将不同频带中的驱动信号提供给不同的扬声器对。 当使用扩展换能器时,换能器的振动传播特性可以被布置成从位于换能器的较高频率发射端处的激励装置过滤沿换能器传递的振动。
    • 30. 发明授权
    • Method of and system for distributing digital audio image data
    • 数字音频图像数据的分配方法和系统
    • US5699360A
    • 1997-12-16
    • US597967
    • 1996-02-07
    • Masami NishidaTakashi TakeuchiHiroaki TakahashiMasayuki InoueHitoshi AkiyamaMasakazu Hamaguchi
    • Masami NishidaTakashi TakeuchiHiroaki TakahashiMasayuki InoueHitoshi AkiyamaMasakazu Hamaguchi
    • H04N5/46H04N7/08H04N7/081H04N7/10H04N7/18H04N19/00H04N19/423H04N19/46H04N19/65H04N19/70H04N19/89H04N21/231H04N21/2365H04J3/12
    • H04H20/30
    • Digitally-compressed audio and image data of a plurality of programs (logical channels) are distributed and superimposed for every horizontal synchronizing signal period together with identification information of each of the programs in place of a luminance signal of an analog video signal of each of physical channels. Each of the physical channels is superimposed in its frequency and distributed from a signal transmission facility of a broadcasting station. At the receiving side, a desired physical analog channel is tuned and the compressed digital audio and image data superimposed on the tuned video signal are selected and taken as desired logical channel data in reference to program identification information, and the compressed digital audio and image data are decoded to obtain their original audio and moving images. With such an arrangement as above, in an existing CATV system, a mere insertion of an encoder unit into a transmission side and a decoder unit into a receiving side, without improving a characteristic of an analog video signal distribution system such as a cable or the like, respectively, enables a greater number of programs to be supplied correspondingly by the amount of digital compression.
    • 对于每个水平同步信号周期,多个节目(逻辑信道)的数字压缩音频和图像数据与每个节目的识别信息一起被分配和叠加,代替每个节目的每个物理的模拟视频信号的亮度信号 频道 每个物理信道以其频率叠加并从广播电台的信号传输设备分发。 在接收侧,调谐期望的物理模拟通道,并且参考节目识别信息选择叠加在调谐视频信号上的压缩数字音频和图像数据作为期望的逻辑信道数据,并且压缩的数字音频和图像数据 被解码以获得其原始音频和运动图像。 通过上述这样的布置,在现有的CATV系统中,仅将编码器单元插入发送侧,将解码器单元插入到接收侧,而不改进诸如电缆或模拟视频信号分配系统的特性 分别使得能够相应地通过数字压缩量来提供更多数量的节目。