Hybrid Multiple Description Coding Based on H.264

Abstract

Multiple description (MD) video coding is one of the approaches that can be used to reduce the detrimental effects caused by transmission over error-prone networks. A number of approaches have been proposed for MD coding, where each provides a different tradeoff between compression efficiency and error resilience. This paper first presents two basic MD coding methods; one segments the video in the spatial domain, while the other in the frequency domain. Then a hybrid MD coding method is proposed. The hybrid MD encoder segments the video in both the spatial and frequency domains. In the case of data loss, the hybrid MD decoder takes advantage of the residual-pixel correlations in the spatial domain, and the coefficient correlations in the frequency domain, for error concealment. As a result, better error resilience can be achieved at high compression efficiency. The advantages of the proposed hybrid MD method are demonstrated in the contexts of descriptor loss in ideal channels and in packet-loss networks.

High Quality of Service on Video Streaming in P2P Networks Using FST-MDC

“…Figure 3 shows the combination of the previous two, in the sense that data from both the current time instant and other time instants is used. These techniques estimate motion and create an image by displacing objects (e.g., pixels or macro blocks).The idea behind the spatial-temporal concealment technique is to have the best of both worlds by combining the spatial and the temporal concealment techniques [15,16,17]. This way, some parts of the image might be concealed using spatial concealment, others by using temporal concealment and still others by using a little bit of both.…”

Reliable Streaming of Stereoscopic Video Considering Region of Interest

“…For example, Lu et al introduced a hybrid MDC algorithm that combines temporal and spatial domains to create descriptions [121]. Based on Hsiao and Tsai's MDC algorithm, the spatial MDC and frequency MDC (coefficient partitioning) are combined [122]; Xu et al also have combined the spatial MDC and frequency MDC. The only difference is that they chose the multiple description scalar quantizer in order to use the frequency domain [123].…”