Adaptive quantization based on saliency map at frame level of H.264/AVC rate control scheme

Abstract : In the frame-level rate control algorithm of H.264/AVC baseline profile, the Quantization Parameter (QP) is determined according to a target bit-rate estimated by the bit allocation process and a frame complexity measure. The target bits calculation process assumes similar characteristics for all frames and for a single frame on the whole set; the Mean Average Difference (MAD) is used as complexity measure. As a result, inappropriate QP values are selected leading to inefficient bit allocation. To overcome this limitation, we propose a new frame level QP adjustment. The proposed algorithm exploits a saliency map to allocate more bits to more salient frames. The saliency map is produced simulating the human visual attention by a bottom-up (signal-dependent) approach. Experimental simulations conducted at low bit-rates show that the proposed approach reduces bit-rates up to 26% without visual quality loss when compared to H.264/AVC JM15.0 reference software.
Type de document :
Communication dans un congrès
UViP, 2011, Paris, France. pp.61 - 66, 2011
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https://hal.archives-ouvertes.fr/hal-00915233
Contributeur : Mohamed-Chaker Larabi <>
Soumis le : vendredi 6 décembre 2013 - 18:06:56
Dernière modification le : vendredi 29 janvier 2016 - 16:47:04

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  • HAL Id : hal-00915233, version 1

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Miryem Hrarti, Abdelhakim Saadane, Mohamed-Chaker Larabi, Ahmed Tamtaoui, Driss Aboutajdine. Adaptive quantization based on saliency map at frame level of H.264/AVC rate control scheme. UViP, 2011, Paris, France. pp.61 - 66, 2011. 〈hal-00915233〉

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