Two-line mac high definition television system
    22.
    发明授权
    Two-line mac high definition television system 失效
    双线高清电视系统

    公开(公告)号:US4908697A

    公开(公告)日:1990-03-13

    申请号:US77557

    申请日:1987-07-24

    CPC classification number: H04N11/006 H04N11/08

    Abstract: A high definition television signal with a sequential scan with the standard number of lines per frame and double the frame frequency is processed to generate a single MAC line having a duration substantially equal to that of four sequential lines of standard duration. Each MAC line has two luminance components having different compression ratios. For the remaining two lines, compressed line difference signals are transmitted, thereby allowing reconstruction of all luminance lines at the receiver. Each MAC line further has a U chrominance component and a V chrominance component, alternatively compressed 1:4 and 1:2. The remaining parts of each MAC line are taken up by data signals and audio as well as the necessary clamping. The luminance and chrominance signals are prefiltered to prevent artifacts. The filtering is geared to the visual characteristics of the human visual system, i.e. diagonal spatial frequencies are subjected to more filtering then either purely horizontal or purely vertical spatial frequencies.

    Abstract translation: 处理具有每帧的标准行数和帧频倍数的顺序扫描的高分辨率电视信号以产生具有基本上等于标准持续时间的四个连续行的持续时间的持续时间的单个MAC线。 每个MAC线具有两个具有不同压缩比的亮度分量。 对于其余两行,传送压缩线差信号,从而允许在接收器处重建所有亮度线。 每个MAC线路还具有U色度分量和V色度分量,或者压缩1:4和1:2。 每个MAC线路的其余部分被数据信号和音频以及必要的夹紧所占据。 亮度和色度信号被过滤以防止伪像。 滤波适用于人类视觉系统的视觉特征,即对角空间频率经受更多的滤波,然后是纯水平或纯垂直的空间频率。

    Information retrieval system with serial access data storage and random
access data retrieval
    26.
    发明授权
    Information retrieval system with serial access data storage and random access data retrieval 失效
    具有串行访问数据存储和随机访问数据检索的信息检索系统

    公开(公告)号:US5699547A

    公开(公告)日:1997-12-16

    申请号:US521191

    申请日:1995-08-30

    Abstract: An information retrieval system in which information is stored in digital form in a serial access device such as a digital VCR, the information being organized as a library of successive albums, each album having successive tracks of individually identifiable items of information, such as audio performances, subjects or events. A random access device, such as a compact disc player or magnetic hard disc drive, has stored therein a portion of a preselected track of each album and a brief introductory portion of each of the remaining tracks in each album. Both devices are coupled to a common data bus and are controlled by a programmable processor so that during search intervals of the serial access device to access a selected album or track read-out thereof is initiated by the random access device. When the serial access device is ready to access selected track or album, read-out is switched over thereto. In this way the required storage capacity of the random access device is minimized while still providing random access to any album and to any track in an already designated album.

    Abstract translation: 一种信息检索系统,其中信息以数字形式存储在诸如数字VCR的串行访问设备中,该信息被组织为连续相册的库,每个相册具有可独立识别的信息项目的连续轨道,诸如音频表演 ,科目或事件。 诸如光盘播放器或磁性硬盘驱动器之类的随机存取装置已经在其中存储了每个专辑的预选轨道的一部分和每个专辑中每个剩余轨道的简要介绍部分。 两个设备都耦合到公共数据总线,并由可编程处理器控制,使得在串行访问设备访问所选择的相册或轨道读出的搜索间隔期间由随机存取设备发起。 当串行访问设备准备好访问所选轨道或专辑时,读取被切换到其上。 以这种方式,随机访问设备的所需存储容量被最小化,同时仍然提供对任何专辑和已经指定的专辑中的任何轨道的随机访问。

    Apparatus and method for producing periodic synchronization references
forming a synchronization signal
    27.
    发明授权
    Apparatus and method for producing periodic synchronization references forming a synchronization signal 失效
    用于产生形成同步信号的周期性同步参考的装置和方法

    公开(公告)号:US5418573A

    公开(公告)日:1995-05-23

    申请号:US95980

    申请日:1993-07-22

    CPC classification number: H04N21/4302 H03L7/00 H04N5/126 H04N7/56

    Abstract: An apparatus, such as an adaptive flywheel, and method for producing periodic time references, forming a periodic time reference signal, from uncertain time references. A counter counts from a first count value to a second count value and provides a periodic time reference each time its count reaches the second count value. An error processing device, coupled to the counter, determines (a) whether an uncertain time reference is received within a predetermined range of count values (corresponding to a window of expectation), or (b) whether the absolute value of the average of an error, corresponding to the number of increment values before or after the second count value, whichever is lower, the count is at when an uncertain synchronization reference is received, and at least one previously determined error for at least one previously received uncertain synchronization reference is greater than WC/2 increment values. The error processing device causes the counter to reset the count to the first count value when, with respect to (a), an uncertain time reference is received when the count is at a count value other than one in the range of predetermined count values, and with respect to (b), the absolute value of the average error is greater than a predetermined number of (i.e., WC2) increment values.

    Abstract translation: 一种诸如自适应飞轮的装置,以及用于从不确定的时间基准产生周期性时间基准,形成周期时间参考信号的方法。 计数器从第一计数值计数到第二计数值,并且每次其计数达到第二计数值时提供周期性时间参考。 耦合到计数器的错误处理装置确定(a)在预定范围的计数值(对应于期望窗口)内是否接收到不确定的时间基准,或者(b)是否将平均值的绝对值 错误,对应于在第二计数值之前或之后的增量值的数量(以较低者为准),计数在接收到不确定的同步参考时处于,并且至少一个先前确定的至少一个先前接收的不确定同步参考的误差为 大于WC / 2增量值。 误差处理装置使计数器将计数值复位为第一计数值,当(a)中,当计数值在预定计数值的范围内的计数值以外的计数值时,接收到不确定的时间基准, 并且关于(b),平均误差的绝对值大于预定数量(即WC2)增量值。

    Decomposition and recombination of a wide-aspect ratio image
    29.
    发明授权
    Decomposition and recombination of a wide-aspect ratio image 失效
    宽纵横比图像的分解和重组

    公开(公告)号:US5126844A

    公开(公告)日:1992-06-30

    申请号:US776887

    申请日:1991-10-10

    CPC classification number: H04N11/004 Y10S348/904

    Abstract: Each line of a wide aspect ratio television signal is divided into a main panel component and an autmentation panel component joined to the main panel component at a stitch point for transmission or storage. At the transmitter, a first signal is extracted from the horizontal line signal, the first signal including the main panel component, a plurality of main panel redundant pixels extending from the main panel into the augmentation panel component, and a multiplicity of weighted main panel transition samples extending further into said augmentation panel component from the redundant samples. Similiarly, a second signal includes the augmentation panel component, a plurality of augmentation panel redundant samples extending into the main panel and a plurality of transition augmentation samples extending from the redundant augmentation samples further into the main panel and weighted to create a predetermined transition curve. At the receiving end, both signals are gated to delete the transition curves, and the redundant samples are linearly weighted to effect the transition from the main panel component to the augmentation panel component. When two augmentation panels are transmitted in a multiplex analog format on the same channel, they are transmitted adjacent to one another and the weighted transition augmentation samples effect a transition from the last redundant pixel of one augmentation panel component to the first redundant pixel of the second augmentation panel component.

    Abstract translation: 宽纵横比电视信号的每一行被划分成主要面板组件和连接到主面板组件的用于发送或存储的针迹点的自动化面板组件。 在发送器处,从水平线信号中提取第一信号,第一信号包括主面板组件,从主面板延伸到增强面板组件中的多个主面板冗余像素,以及多个加权主面板转换 样本从冗余样本进一步延伸到所述增强面板组件中。 类似地,第二信号包括增强面板组件,延伸到主面板中的多个增强面板冗余样本以及从冗余增强样本进一步延伸到主面板中并被加权以创建预定的过渡曲线的多个过渡增加样本。 在接收端,两个信号被选通以删除过渡曲线,并且冗余样本被线性加权,以实现从主面板组件到增强面板组件的转换。 当在同一信道上以多路复用模拟格式发送两个增强面板时,它们彼此相邻地传输,并且加权的转换增强样本影响从一个增强面板组件的最后一个冗余像素到第二个冗余像素的转换 增强面板组件。

    HDNTSC channel with time and frequency multiplexing
    30.
    发明授权
    HDNTSC channel with time and frequency multiplexing 失效
    HDNTSC频道具有时频复用功能

    公开(公告)号:US4945411A

    公开(公告)日:1990-07-31

    申请号:US239148

    申请日:1988-08-31

    CPC classification number: H04N11/008 H04N9/797

    Abstract: A high definition television encoder which provides an efficient use of bandwidth, segments line differential signals into left panel, center segment, and right panel line differential signals and time expands the left and right panel line differential, panel, and luminance signals. The time corresponding expanded left and right panel line differential signals are arranged in time coincidence and quadrature modulated, as are the corresponding segments of the panel signals. The quadrature modulations providing signals in contiguous frequency bands. Luminance signals are converted to a band abutting the contiguous frequency bands as are digital audio signals. The digital audio signals, quadrature modulated signals and luminance signals are frequency multiplexed within a 3 MHz band.

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