| 摘要 |
<p>The X-MAC coder makes it possible to code plural components, each having a sequence of packets distributed as successive bursts each occupying a specified fraction of a television frame line. It comprises: plural units each having at least one packet coder (101, ...) provided with a buffer memory for storing digital data from a source and a coder (161, 162, ... 16n) for distributing packets as bursts of adjustable duration equal to at most the duration of a television line; it moreover comprises a basic coder assembly containing a programmable device for assigning a specified window of the television frame to each unit and means for calling up a burst of length corresponding to the width in the window which is assigned by the programmable device, from the burst coder of the respective unit, with each start of the window in a line. <IMAGE></p> |
