Résumé: In this research, we investigated and analyzed the performance of an optical video transmission system. We combined the benefits of HEVC compression techniques and OTDM multiplexing using the Differential Phase Shift Keying (DPSK) scheme. Source and channel coding are separately designed and then cascaded. The intra-prediction module used in HEVC encoder has been implemented using the Matlab tool to show its ability to select the coding prediction threshold and block size using all prediction unit sizes and modes PUs). The obtained results have been implemented for the second contribution concerning the proposed iber transmission system using the OptiSystem software. To evaluate the proposed system, several metrics were used, including the signal-to-noise ratio (SNR), Q-factor, and bit error rate (BER). The simulation results show that the optimization criterion led to better performance in terms of transmission quality, in improving Q-factor and minimizing (BER), thus providing a significant resolution reduction of the video stream, which reduces the amount of data before being transmitted on the optical fiber.

Résumé: Abstract – We study the feasibility of video transmission over optical fibre to optimise bandwidth with the implementation of HEVC codec features. We use simulation (Matlab and the OptiSystem software). Different values of the CRF are used to evaluate its impact on the visual quality and the size of the encoded file, as well as its influence on the video transmission performance. The simulation results show that by adjusting the CRF, the encoders can optimise the compression of the video data to reduce the file size while preserving an acceptable visual quality. This makes it possible to adapt the transmission to the bandwidth constraints of the optical fibre, by choosing higher CRF values to reduce the size of the files and save bandwidth, or lower values to maintain optimal quality when the bandwidth is sufficient. In addition, from the optical fibre point of view, the dispersion weakens and the eye opens, and it is observed that the length of the fibres is inversely proportional to the signal transmission quality. Thus, the judicious use of different CRF values can contribute to efficient and high-quality video transmission via optical fibre.