Data transmission method and data transmission system for digital video optical transceiver system

Abstract

The invention relates to the field of photoelectric communication, and discloses a data transmission method and a data transmission system for a digital video optical transceiver system. According to the data transmission method and the data transmission system, coding redundancy is adjusted according to the error rate, whether or not a forward error correction coding mode is needed and which forward error correction decoding mode of the coding redundancy is adopted are determined dynamically, and accordingly, forward error correction coding/decoding technology based adaptive error detection and correction are achieved. The data transmission method includes receiving video data and information representing the coding redundancy of the video data through an optical fiber; selecting the corresponding forward error correction decoding mode to decode the video data according to the information representing the coding redundancy; calculating the error rate of the decoded video data; adjusting the coding redundancy according to the error rate; according to the adjusted coding redundancy, selecting the corresponding forward error correction coding mode to code the to-be-sent video data; sending the video data and the information representing the coding redundancy through the optical fiber.

Description

technical field [0001] The invention relates to the field of photoelectric communication, in particular to a communication technology of a digital video optical transceiver system. Background technique [0002] In the existing video optical transceiver system, as the demand for optical fiber communication transmission capacity and distance continues to increase, fiber dispersion, signal attenuation caused by long distances, channel noise, and interference between multiple wavelengths in an optical fiber have become high The main limiting factor of long-distance optical fiber application; at the same time, because the transmission in the existing digital video optical transceiver system is uncompressed original data stream, sometimes in order to judge the correctness of transmission, it will supplement the cyclic verification method for verification, but the cyclic verification The method can only detect errors, but does not have the ability to correct errors. In this way, th...

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Problems solved by technology

[0002] In the existing video optical transceiver system, as the demand for optical fiber communication transmission capacity and distance continues to increase, fiber dispersion, signal attenuation caused by long distances, channel noise, and interference between multiple wavelengths in an optical fiber have become high The main limiting factor of long-distance optical fiber application; at the same time, because the transmission in the existing digital video optical transceiver system is uncompressed original data stream, sometimes in order to judge the correctness of transmission, it will supplement the cyclic verification method for verification, but the cyclic verification The method can only detect errors, but does not have the ability to correct errors. In this way, the bit errors generated by optical fiber transmission often cause bright spots on the image to flicker, unstable synchronization, jitter up and down, and even black screens that cannot be displayed seriously.

[0003] Forward Error Correction (Forward Error Correction, referred to as "FEC") technology is generally used in large-scale optical network systems in optical communications, such as large-capacity high-density wavelength division multiplexing (Dense WaveLength Division Multiplexing, referred to as "DWDM") ”) system, but there is currently no similar case for applying forward error correction technology to video optical transceivers

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