Method and apparatus for operating a multicast system on an unreliable
network
    8.
    发明授权
    Method and apparatus for operating a multicast system on an unreliable network 失效
    用于在不可靠网络上操作多播系统的方法和装置

    公开(公告)号:US5894480A

    公开(公告)日:1999-04-13

    申请号:US946892

    申请日:1997-10-08

    摘要: A multicast network system comprises a data network which provides a medium for data transfer. A media source having a control packet and media packets coupled to the data network broadcasts the control packet and the media packets to the data network and rebroadcasts the control packet in conjunction with the media packets to the data network. A media receiver is coupled to the network and receives the control packet and the media packets from the data network to process the control packet and the media packets to produce a media output.

    摘要翻译: 组播网络系统包括提供用于数据传输的介质的数据网络。 具有控制分组和耦合到数据网络的媒体分组的媒体源将控制分组和媒体分组广播到数据网络,并将控制分组与媒体分组重新广播到数据网络。 媒体接收器耦合到网络并且从数据网络接收控制分组和媒体分组以处理控制分组和媒体分组以产生媒体输出。

    Method for compresssing and decompressing color video data that uses
luminance partitioning
    9.
    发明授权
    Method for compresssing and decompressing color video data that uses luminance partitioning 失效
    用于压缩和解压缩使用亮度分区的彩色视频数据的方法

    公开(公告)号:US5047853A

    公开(公告)日:1991-09-10

    申请号:US495331

    申请日:1990-03-19

    摘要: A data compression method which recognizes the adverse conditions of duochrominance-isoluminance and nonlinear color distribution. A mxn block of pixel data is examined to compute two colors and a bitmap which best represent the block generally using a luminance partitioning technique. The original data and the compressed data are examined to determine if the resultant decompresssed image will contain artifact associated with duochrominance-isoluminance or nonlinear color distribution. If these artifacts will occur in the decompressed data, the decompressed data is not used but rather the block is represented by storing the color of each pixel. This method produces compressed images of excellent quality.

    摘要翻译: 一种识别双色差异和非线性颜色分布的不利条件的数据压缩方法。 检查m×n像素数据块以计算两种颜色,并且通常使用亮度分割技术最好地表示块的位图。 检查原始数据和压缩数据以确定所得到的解压缩图像是否将包含与二色性 - 隔离性或非线性颜色分布相关联的伪影。 如果在解压缩数据中出现这些伪影,则不使用解压缩数据,而是通过存储每个像素的颜色表示块。 该方法生产出优质的压缩图像。