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    • 4. 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。
    • 5. 发明授权
    • Video signal processing method and apparatus with timebase disturbance
correction and dropout compensation
    • 视频信号处理方法和具有时基干扰校正和丢失补偿的装置
    • US5239421A
    • 1993-08-24
    • US688284
    • 1991-04-22
    • Masakazu HamaguchiTakashi FuruhataHiroaki Takahashi
    • Masakazu HamaguchiTakashi FuruhataHiroaki Takahashi
    • H04N5/7826H04N5/94H04N5/956H04N9/81H04N9/88H04N9/896
    • H04N5/956H04N5/94H04N5/78266H04N9/81H04N9/88H04N9/896
    • A method of reproducing video signals from a magnetic recording medium like a magnetic tape for a VTR to obtain high-quality video pictures even when dropouts occur in the medium, which includes the steps of separating synchronizing information from the video signals reproduced from the magnetic recording medium, detecting a dropout duration from the reproduced video signals, generating complete synchronizing information during a whole period of writing the signals in image information memories by compensating lost synchronizing information during the dropout, generating write address signals on the basis of the generated synchronizing information, writing reproduced video signals the memories on the basis of the generated write address signals while no dropout occurs, and leaving unchanged previously written video signals while a dropout occurs. According to an apparatus implementing the above method, reproduced pictures of high quality are obtained without jitters and skews due to dropouts.
    • 一种从VTR用磁带等磁记录介质再现视频信号的方法,即使在介质中出现缺陷时也能获得高质量的视频图像,其中包括从与磁记录重现的视频信号分离同步信息的步骤 介质,从再现的视频信号中检测出一个压差持续时间,在通过在丢失期间补偿丢失的同步信息的整个写入信号在图像信息存储器中的整个周期期间产生完整的同步信息,根据生成的同步信息产生写入地址信号, 在不产生压降的情况下,根据所生成的写入地址信号对再现的视频信号进行写入,并且在出现发生缺陷的同时留下未改变的先前写入的视频信号。 根据实现上述方法的设备,获得高质量的再现图像,而不会由于丢失而产生抖动和偏差。