Video over mobile networks [Guest editorial]

Video is a major challenge for the future mobile Internet as it is foreseen to account for close to 70 percent of consumer mobile traffic by 2016. Already, mobile network operators are suffering from the exploding number of subscribers accessing high-volume mobile data services, and this trend is expected to intensify even further in the near future. The enormous proliferation of multimedia-capable portable devices - such as smart phones, tablets, and laptops equipped with 3G and WLAN interfaces - has increased the volume and variety of multimedia digital content and related services