Optimization of hierarchical modulation for use of scalable media

Authors:
Yongheng Liu;Conor Heneghan
Affiliations:
Department of Electronic and Electrical Engineering, University College Dublin, Dublin, Ireland;National University of Ireland, Dublin, Ireland
Venue:
EURASIP Journal on Advances in Signal Processing
Year:
2010

Citing 3
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Abstract

This paper studies the Hierarchical Modulation, a transmission strategy of the approaching scalable multimedia over frequency-selective fading channel for improving the perceptible quality. An optimization strategy for Hierarchical Modulation and convolutional encoding, which can achieve the target bit error rates with minimum global signal-to-noise ratio in a single-user scenario, is suggested. This strategy allows applications to make a free choice of relationship between Higher Priority (HP) and Lower Priority (LP) stream delivery. The similar optimization can be used in multiuser scenario. An image transport task and a transport task of an H.264/MPEG4 AVC video embedding both QVGA and VGA resolutions are simulated as the implementation example of this optimization strategy, and demonstrate savings in SNR and improvement in Peak Signal-to-Noise Ratio (PSNR) for the particular examples shown.