Non-homologous clock data transmission system

Abstract

The invention discloses a non-homologous clock data transmission system, and the system at least comprises a sending end and a receiving end, wherein the sending end is used for transmitting serial data to the receiving end through an optical fiber, and the receiving end at least comprises a serial data acquisition unit, a channel processing unit and an output unit; the channel processing unit atleast comprises a data writing control unit, a data reading control unit, a cache unit, a local clock and a channel output unit, wherein the cache unit is used for at least opening up a three-frame data space to cache channel data; the data writing control unit is used for writing the channel data into the cache frame by frame; the data reading control unit is used for reading data from the cacheunit frame by frame by taking a local clock as a reference; the data write-in control unit and the data read-out control unit execute data write-in operation and data read-out operation on the cache unit at the same time, and a read-write mechanism is set as follows: during address switching, the data write-in control unit controls a write address to be switched to a cache region which is not pointed by the read-write address; and the data read-out control unit controls the read address to be switched to the cache region written last time.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a non-homologous clock data transmission system. Background technique [0002] With the increase of the transmission rate of the data communication system, the requirements for the communication cable are getting higher and higher, especially for some long-distance data communication systems, the optical fiber is generally used for long-distance transmission, usually the optical fiber only transmits data, not Transmit clock signal. However, adding a reference clock frequency channel to the communication cable is a relatively large cost consumption for the entire system. [0003] In the above-mentioned communication system, since the receiving end does not receive the clock signal of the sending signal, in order to solve this technical problem, the usual practice in the prior art is to recover the clock signal at the receiving end, that is, to extract the clock signal ...

AI Technical Summary

Problems solved by technology

However, during high-speed data transmission, such as high-speed video signal transmission, the requirements for video signal synchronization are very high, and the accuracy requirements for the receiving end to restore the clock of the sending end are greatly improved, and it is often difficult to meet the application requirements. Once the clock deviates, the receiving end Video playback will produce unsmooth phenomenon; in addition, the existing technology uses hardware to realize clock signal recovery, which also greatly increases the complexity of the system

Images