Recursive Distortion Estimation for Hybrid Digital-Analog Video Transmission

Abstract

Recently, hybrid digital-analog (HDA) video transmission scheme has shown advantages in avoiding the cliff effect. However, most HDA schemes assume perfect transmission of digital signals, which is hardly the case in practice. This paper proposes a scheme named RDE-HDA that recursively estimates the decoder-side distortion from the encoder-side for HDA system, and both transmission error and superposition process of digital and analog parts are taken into consideration. Therefore, our method does not require the digital part of the HDA output to be transmitted losslessly, making the HDA more practical. We derive the closed-form expression of the recursive distortion estimation for HDA system. The accuracy of our method is verified by simulation results.