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    • 14. 发明授权
    • Frequency selective video signal intraframe processor
    • 频率选择性视频信号帧内处理器
    • US4910585A
    • 1990-03-20
    • US215123
    • 1988-06-29
    • Terrence R. SmithMichael A. IsnardiRobert N. Hurst, Jr.
    • Terrence R. SmithMichael A. IsnardiRobert N. Hurst, Jr.
    • H04N7/015H04N11/20H04N11/24
    • H04N11/008
    • A widescreen television signal containing center panel information and time compressed side panel information in an overscan region is intraframe processed above a given frequency only with respect to the center panel information. The intraframe processing apparatus includes a signal delay network with first and second 262H delay elements coupled between an input and an output of the delay network. During a first field interval, signals from the delay input and from an intermediate point between the delay elements are subtractively combined to produce a difference term which is coupled to a signal path. During a second field interval, signals from the delay output and from the intermediate point are subtractively combined to produce a difference term which is coupled to the signal path. An intraframe processed output signal is produced by combining the difference terms from the signal path with a signal from the intermediate delay point. A filter and an electronic gate in the signal path determine frequency selective intraframe processing of the center panel information alone.
    • 包含中央面板信息和过扫描区域中的时间压缩侧面板信息的宽屏幕电视信号仅在相对于中心面板信息的给定频率上进行帧内处理。 帧内处理装置包括信号延迟网络,其中第一和第二262H延迟元件耦合在延迟网络的输入和输出之间。 在第一场间隔期间,来自延迟输入的信号和来自延迟元件之间的中间点的信号被减法地组合以产生耦合到信号路径的差分项。 在第二场间隔期间,来自延迟输出和来自中间点的信号被减法地组合以产生耦合到信号路径的差分项。 通过将来自信号路径的差分项与来自中间延迟点的信号组合来产生帧内处理的输出信号。 信号路径中的滤波器和电子门仅决定中心面板信息的频率选择性帧内处理。
    • 15. 发明授权
    • Extended definition widescreen television system using plural signal
transmission channels
    • 使用多信号传输通道的扩展定义宽屏电视系统
    • US4888641A
    • 1989-12-19
    • US252340
    • 1988-10-03
    • Michael A. IsnardiTerrence R. SmithJack S. FuhrerBarbara J. Roeder
    • Michael A. IsnardiTerrence R. SmithJack S. FuhrerBarbara J. Roeder
    • G06T9/00H04N7/26H04N7/46H04N11/24
    • H04N11/008H04N11/004H04N19/577H04N19/30
    • A system for transmitting and receiving signals representing a high-definition television (HDTV) image is disclosed. The signals are sent over two conventional 6 MHz NTSC channels. A first signal, the main signal, is developed by encoding circuitry from HDTV source signals to be compatible with existing NTSC receivers in that it produces a display on those receivers which is not significantly distorted. The main signal includes psychophysically hidden video information which may be used by an extended definition receiver to produce a widescreen image having a higher level of detail than a conventional video image. A second signal, the auxiliary signal, is developed at the transmitter by decoding the main signal and subtracting the decoded main signal from the original HDTV source signals. The auxiliary signal, which includes frequency components from 0 Hz to 20 MHz is split into three bands, A (0 Hz-6MHz), B (6 MHz-12 MHz) and C (12 MHz-18 MHz). Bands B and C are frequency converted to occupy the 0 Hz-6 MHz band and are time division multiplexed on a line by line basis. The combined B and C bands are then time division multiplexed with the A band on a frame by frame basis for still images. For moving images, only the A band is sent. The receiver decodes the main signal, and, using a motion signal sent with the main signal, decodes the auxiliary signal. The decoded main and auxiliary signals are combined to reproduce the HDTV image.
    • 公开了一种用于发送和接收表示高分辨率电视(HDTV)图像的信号的系统。 信号通过两个常规的6 MHz NTSC通道发送。 第一个信号,主要信号,由HDTV源信号的编码电路开发,以与现有的NTSC接收机兼容,因为它在这些接收机上产生不显着失真的显示。 主要信号包括心理物理隐藏的视频信息,其可由扩展定义接收机使用以产生具有比常规视频图像更高的细节水平的宽屏幕图像。 通过对主信号进行解码并从原始HDTV信号中减去解码的主信号,在发送器处产生第二信号辅助信号。 包括0Hz至20MHz频率分量的辅助信号分为A(0Hz-6MHz),B(6MHz-12MHz)和C(12MHz-18MHz)三个频带。 频带B和频段C被频率转换成占用0Hz-6MHz频带,并逐行进行时分复用。 然后,对于静止图像,组合的B和C频带逐帧地与A频带进行时分复用。 对于运动图像,只发送A波段。 接收机解码主信号,并使用与主信号一起发送的运动信号,对辅助信号进行解码。 解码的主和辅助信号被组合以再现HDTV图像。