data channel中文什么意思

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1. Further investigated and analyzed composition structure and flow data that dsa ' s formation of image is systematic at first in this paper , carried on intact summing up to the data in the system , having given out the plan of design of high speed and large capacity data channel of digital formation of image system of x - ray ; deeper discussion of control way on sdram , give solution that many pieces of sdram works togetherses of realizing heavy capacity , designing of heavy capacity deposit board realize storing at a high speed to vision data by frame on the basis of this ; through further investigations of interface of pci bus , optimize back end state machine design and urge procedure making with lower , giving intact pci interface scheme that realize high speed dma data transmission and satisfy request of video transmitting ; further investigate the figure systematic design method of programmable logic devices , due to the difficult point of drifting about of enabled signal in fifo in common use and setting up and keeping of output signal , method has been proposed of improving stability of system making use of signal utilizing the phase locking ring in fpga to offer a lot of clocks to move thus realize coordinating the data between every module of system to transmit at a high speed by making use of fifo
   本文首先对数字减影血管造影( dsa )成像系统的组成结构和数据流向进行了深入研究和分析，并对系统中的数据流向进行了完整的归纳和总结，给出了x线数字成像系统中的高速大容量数据通道的设计方案；在对sdram的控制方式做了深入探讨后，给出了实现大容量多条sdram共同工作的解决方案，在此基础上设计了大容量帧存板实现对图象数据进行高速存储；通过对pci总线接口的深入研究，优化后端状态机设计和低层驱动程序开发，给出了完整的pci接口方案实现高速dma数据传输，完全可以满足视频传输要求；深入研究了基于大规模可编程器件的数字系统设计方法，针对通用fifo使能信号漂移、输出数据难于建立和保持等设计难点，提出了利用fpga中的锁相环提供多个时钟相移的信号来提高系统稳定性的解决方案，从而实现利用fifo来协调系统各模块之间的数据高速传输。
2. In this article , a method that designs the high rate multiplexer with fpga technology and vhdl language is described . the multiple digital signals will be multiplexed in one data channel by the multiplexer , while the data is packaged in ccsds standard format . the algorithm that make data channel alternate regularly is also elaborated in the paper
   本文阐述了利用先入先出存储器fifo进行异步速率调整，应用vhdl语言和可编程门阵列fpga技术，对多个信号源数据进行数据打包、信道选通调度和多路复接的方法。