Apparatus and method for packetizing and segmenting MPEG packets
    7.
    发明授权
    Apparatus and method for packetizing and segmenting MPEG packets 失效
    用于打包和分割MPEG分组的装置和方法

    公开(公告)号:US5689509A

    公开(公告)日:1997-11-18

    申请号:US748554

    申请日:1996-11-08

    摘要: A circuit and method for optimizing efficiency in transferring a block of data having a plurality of frames of limited size from a memory element. The circuit comprises a transmit ("TX") DMA engine and a TX Segmentation engine. The TX DMA engine is responsible for accessing overhead information for the block of data within a TX data buffer from a data descriptor dedicated to that particular TX data buffer. The TX DMA engine is further responsible for reading the block of data from the memory element to be stored local thereto. The TX Segmentation engine is responsible for segmenting the block of data into a plurality of cell packets corresponding in number to the plurality of frames. Each cell packet contains in common the overhead information for the block of data to avoid the TX DMA engine re-accessing the data descriptor to obtain the same overhead information for each frame being transferred.

    摘要翻译: 一种用于优化从存储元件传送具有有限尺寸的多个帧的数据块的效率的电路和方法。 该电路包括发送(“TX”)DMA引擎和TX分段引擎。 TX DMA引擎负责从专用于该特定TX数据缓冲器的数据描述符中访问TX数据缓冲器内的数据块的开销信息。 TX DMA引擎还负责从本地存储的存储器元件读取数据块。 TX分段引擎负责将数据块分割成与多个帧相对应的多个信元分组。 每个单元包共同地包含用于数据块的开销信息,以避免TX DMA引擎重新访问数据描述符,以便为每个被传送的帧获得相同的开销信息。