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    Audio-video data interface for a high speed communication link in a video-graphics display window environment
    3.
    发明公开
    Audio-video data interface for a high speed communication link in a video-graphics display window environment 失效
    音频 - 视频数据接口，用于图形的视频数据在一个窗口显示环境中的高速通信链路。

    公开(公告)号：EP0424743A2

    公开(公告)日：1991-05-02

    申请号：EP90119491.0

    申请日：1990-10-11

    申请人： International Business Machines Corporation

    发明人： Lumelsky, Leon ,  Choi, Sung Min ,  Peevers, Alan Wesley

    IPC分类号： G06F3/14

    CPC分类号： H04N21/2383 ,  H04N7/148 ,  H04N11/04 ,  H04N21/4382

    摘要： An interface architecture for interconnecting a plurality of video display devices together over a high speed digital communication link having limited bandwidth provides at each node for transmitting during a "transmit mode"; 1) sequential pixels of digital data (COMVIDOUT) comprising separate luminance and chrominance fields, from a digital TV source associated with each display node which data re­presents a scaled video window, 2) the local system clock (SCLK), 3) vertical and horizontal communication sync signals (COMVSOUT and COMSHOUT), 4) luminance and chrominance clock enable signals (COMVOCE and COMCOCE) based on a scaling algorithm utilized in the trans­mitting video device to insure that both the proper pixels and the proper luminance and chrominance fields associated with these pixels are selected by the communications device for transmission. Further, the interface architecture at each display node provides for receiving during a "receive mode", 5) video input data pixels (COMVDIN), 6) a video input data clock enable signal from the communications adapter (COMVINCE) which controls the storage of the received video data window in the local frame buffer, 7) horizontal and vertical video input sync signals from the communicat­ions adapter (COMHSIN and COMVSIN) for properly synchronizing the storing of the received video input data from the communications adapter into the frame buffer beginning at a predetermined address therein. Means are also provided for accessing and transmitting audio data related to the video display data inter­spersed on the network with succesive lines of video pixel data.
    The system utilizes, to a great extent, existing hardware in conventional video display device architectures and associated communications adapters such that a versatile generally applicable transmission system is achievable requiring a minimum of additional control hardware and software.

    摘要翻译： 用于视频显示装置的上的多个高速数字通信链路相互连接在一起的接口结构具有有限的带宽提供在每个节点为一个“发射模式”期间发射; 1）数字数据的顺序像素（COMVIDOUT）包括分离的亮度和色度的字段，从与数据darstellt一个缩放的视频窗口中的每个显示节点相关联的数字电视源，（2）在本地系统时钟SCLK），3）的垂直和水平 通信同步信号（COMVSOUT和COMSHOUT），4）的亮度和色度时钟使能基于在发送视频设备，以确保没有两个与本文相关的合适像素和适当的亮度和色度领域使用的缩放算法信号（COMVOCE和COMCOCE） 像素由用于传输的通信设备选择的。 此外，在每个显示节点的接口的架构提供用于在“接收模式”，5）的视频输入数据的像素（COMVDIN），6）的视频输入数据时钟能够从通信适配器（COMVINCE信号），其控制的存储接收 在本地帧缓冲器中的接收到的视频数据窗口中，从通信适配器（COMHSIN和COMVSIN）用于适当地同步从通信适配器所接收的视频输入数据的存储到帧缓冲器在开始7）的水平和垂直视频输入同步信号 有预定的地址。 这样提供了用于访问和传送与穿插视频像素数据的succesive线网络上的视频显示数据audiodata。 该系统利用，在很大的程度上，在传统的视频显示装置的体系结构和相关联的通信适配器搜索做了通用的基因反弹适用传输系统实现的需要最小的附加控制硬件和软件的现有硬件。

    PROCESSING OF ANALOG VIDEO SIGNALS IN DIGITAL TRANSMISSION SYSTEMS
    4.
    发明公开
    PROCESSING OF ANALOG VIDEO SIGNALS IN DIGITAL TRANSMISSION SYSTEMS 失效
    装置用于发送和接收视频新闻广播。

    公开(公告)号：EP0214185A1

    公开(公告)日：1987-03-18

    申请号：EP86901266.0

    申请日：1986-02-04

    申请人： AT&T Corp.

    发明人： RZESZEWSKI, Theodore, Stanley

    IPC分类号： H04N9 ,  H04N11

    CPC分类号： H04N9/64 ,  H04N11/04

    摘要： Un système (Figs. 1A-1C) permet de transmettre des signaux vidéo à composantes analogiques (Y, (RY), (BY)) sous forme numérique en utilisant des filtres passe-bas à pente raide (104-106) pour limiter la bande des signaux. Des signaux de chrominance sont limités à la moitié de la largeur de bande de 4,2 MHz du signal de luminance. Des équaliseurs de phase (107-109) sont utilisés pour compenser la distorsion due aux filtres à pente raide. Avant échantillonnage, les signaux de chrominance sont filtrés par des filtres à peigne à pente raide (110-111) dans la région où le sous-échantillonnage de Nyquist pondéré provoque la cocanalisation spectrale entre le spectre de la bande de base et sa réplique. Les signaux de luminance sont échantillonnés à l'aide d'un échantillonneur (116) qui utilise une fréquence de super-échantillonnage de Nyquist, tandis que les signaux de chrominance sont échantillonnés à l'aide d'échantillonneurs (117-118) qui utilisent une fréquence de sous-échantillonnage de Nyquist pondéré. Les échantillons de signaux passent au travers de numériseurs (125, 127, 129), de codeurs DPCM (126, 128, 130), et d'un multiplexeur (131) avant d'être transmis à l'aide d'un émetteur (132) sur une ligne interurbaine téléphonique de 90 Mbps (150). Les signaux reçus par le récepteur (200) passent au travers d'un démultiplexeur (201) et de décodeurs DPCM (205, 207, 209) et sont reconvertis en signaux analogiques par des convertisseurs N/A (211-213). Les signaux analogiques sont filtrés par des filtres à peigne à pente douce (214-216) et des filtres passe-bas (217-219) pour en éliminer les répliques des spectres de bande passante. Etant donné que les filtres à pente douce n'entraînent qu'une faible distorsion de phase, des équaliseurs de phase au niveau du récepteur ne sont pas nécessaires.

    Audio-video data interface for a high speed communication link in a video-graphics display window environment
    8.
    发明公开
    Audio-video data interface for a high speed communication link in a video-graphics display window environment 失效
    用于视频图形显示窗口环境中的高速通信链路的音频数据接口

    公开(公告)号：EP0424743A3

    公开(公告)日：1992-07-15

    申请号：EP90119491.0

    申请日：1990-10-11

    申请人： International Business Machines Corporation

    发明人： Lumelsky, Leon ,  Choi, Sung Min ,  Peevers, Alan Wesley

    IPC分类号： G06F3/14

    CPC分类号： H04N21/2383 ,  H04N7/148 ,  H04N11/04 ,  H04N21/4382

    摘要： An interface architecture for interconnecting a plurality of video display devices together over a high speed digital communication link having limited bandwidth provides at each node for transmitting during a "transmit mode"; 1) sequential pixels of digital data (COMVIDOUT) comprising separate luminance and chrominance fields, from a digital TV source associated with each display node which data re­presents a scaled video window, 2) the local system clock (SCLK), 3) vertical and horizontal communication sync signals (COMVSOUT and COMSHOUT), 4) luminance and chrominance clock enable signals (COMVOCE and COMCOCE) based on a scaling algorithm utilized in the trans­mitting video device to insure that both the proper pixels and the proper luminance and chrominance fields associated with these pixels are selected by the communications device for transmission. Further, the interface architecture at each display node provides for receiving during a "receive mode", 5) video input data pixels (COMVDIN), 6) a video input data clock enable signal from the communications adapter (COMVINCE) which controls the storage of the received video data window in the local frame buffer, 7) horizontal and vertical video input sync signals from the communicat­ions adapter (COMHSIN and COMVSIN) for properly synchronizing the storing of the received video input data from the communications adapter into the frame buffer beginning at a predetermined address therein. Means are also provided for accessing and transmitting audio data related to the video display data inter­spersed on the network with succesive lines of video pixel data. The system utilizes, to a great extent, existing hardware in conventional video display device architectures and associated communications adapters such that a versatile generally applicable transmission system is achievable requiring a minimum of additional control hardware and software.

    Parametric reduction technique for enhanced bit rate reduction of color video signals
    9.
    发明公开
    Parametric reduction technique for enhanced bit rate reduction of color video signals 失效
    彩色视频信号增强速率降低的参数减少技术

    公开(公告)号：EP0468450A3

    公开(公告)日：1992-03-11

    申请号：EP91112334.7

    申请日：1991-07-23

    申请人： INTERNATIONAL TELECOMMUNICATIONS SATELLITE ORGANIZATION

    发明人： Sinha, Ashok K.

    IPC分类号： H04N11/02

    CPC分类号： H04N11/04 ,  H04N9/64

    摘要： An apparatus and method for enhanced bit rate reduction of color video signals which provide for converting each selected picture element of the color video signal into its characterizing luminance and wavelength parameters through a series of transformations, and transmitting only the luminance and wavelength parameters over the transmission channel. Inverse transformations are utilized to reconstruct the color video signal on the receive side of the transmission channel. The apparatus and method make it possible to reduce the bit rate, power and/or bandwidth requirements for or increase the quality of color video signal transmissions.

    Parametric reduction technique for enhanced bit rate reduction of color video signals
    10.
    发明公开
    Parametric reduction technique for enhanced bit rate reduction of color video signals 失效
    Parametrische Reduktionstechnikfüreine verbesserte Datenraten-Reduktion von Farbvideosignalen。

    公开(公告)号：EP0468450A2

    公开(公告)日：1992-01-29

    申请号：EP91112334.7

    申请日：1991-07-23

    申请人： INTERNATIONAL TELECOMMUNICATIONS SATELLITE ORGANIZATION

    发明人： Sinha, Ashok K.

    IPC分类号： H04N11/02

    CPC分类号： H04N11/04 ,  H04N9/64

    摘要： An apparatus and method for enhanced bit rate reduction of color video signals which provide for converting each selected picture element of the color video signal into its characterizing luminance and wavelength parameters through a series of transformations, and transmitting only the luminance and wavelength parameters over the transmission channel. Inverse transformations are utilized to reconstruct the color video signal on the receive side of the transmission channel. The apparatus and method make it possible to reduce the bit rate, power and/or bandwidth requirements for or increase the quality of color video signal transmissions.

    摘要翻译： 一种用于增强彩色视频信号的比特率降低的装置和方法，其提供通过一系列变换将彩色视频信号的每个所选择的图像元素转换成其表征亮度和波长参数，并且仅透射传输的亮度和波长参数 渠道。 利用逆变换来重建传输信道的接收侧上的彩色视频信号。 该装置和方法使得可以降低彩色视频信号传输的比特率，功率和/或带宽要求或提高彩色视频信号传输的质量。