Error prevention and concealment for scalable video coding with dual-priority transmission

Wang, Jong Tzy; Chang, Pao-Chi

doi:10.1016/s1047-3203(03)00040-3

Cited by 1 publication

(1 citation statement)

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“…For example, it has been shown that the erroneous areas in the enhancement layer may be ignored by using the motion and texture information from the base layer in order to conceal the errors. 12 This method is quite simple and shows interesting results in terms of concealment. A more complex method was published recently using the information from the upscaled base layer to replace the erroneous areas in the enhancement layer, based on a technique called frame-hallucination.…”

Section: Introductionmentioning

confidence: 97%

Evaluation of MPEG4-SVC for QoE protection in the context of transmission errors

et al. 2010

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Scalable Video Coding (SVC) provides a way to encapsulate several video layers with increasing quality and resolution in a single bitstream. Thus it is particularly adapted to address heterogeneous networks and a wide variety of decoding devices. In this paper, we evaluate the interest of SVC in a different context, which is error concealment after transmission on networks subject to packet loss. The encoded scalable video streams contain two layers with different spatial and temporal resolutions designed for mobile video communications with medium size and average to low bitrates. The main idea is to use the base layer to conceal errors in the higher layers if they are corrupted or lost. The base layer is first upscaled either spatially or temporally to reach the same resolution as the layer to conceal. Two error-concealment techniques using the base layer are then proposed for the MPEG-4 SVC standard, involving frame-level concealment and pixel-level concealment. These techniques are compared to the upscaled base layer as well as to a classical single-layer MPEG-4 AVC/H.264 error-concealment technique. The comparison is carried out through a subjective experiment, in order to evaluate the Quality-of-Experience of the proposed techniques. We study several scenarios involving various bitrates and resolutions for the base layer of the SVC streams. The results show that SVC-based error concealment can provide significantly higher visual quality than single-layer-based techniques. Moreover, we demonstrate that the resolution and bitrate of the base layer have a strong impact on the perceived quality of the concealment.

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Section: Introductionmentioning

confidence: 97%