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— Digital video is becoming widely available in compressed form, such as a motion JPEG or MPEG coded bitstream. In applications such as video browsing or picture-in-picture, or in transcoding for a lower bit rate, there is a need to downscale the video prior to its transmission. In such instances, the conventional approach to generating a downscaled video(More)
  • Bo Shen
  • 2004
H.264 uses a 4-tap integer transform (DCT-like) to produce transform coefficients. This is different from the 8-tap DCT that is used in most prior video coding standards such as MPEG-x. The paper propose two integer algorithms for transcoding from 8-tap DCT data to 4-tap DCT-like data. The approximate nature of the integer transcoding algorithms is(More)
— Researchers often use segment-based proxy caching strategies to deliver streaming media by partially caching media objects. The existing strategies mainly consider increasing the byte hit ratio and/or reducing the client perceived startup latency (denoted by the metric delayed startup ratio). However, these efforts do not guarantee continuous media(More)
Streaming media objects are often cached in segments. Previous segment-based caching strategies cache segments with constant or exponentially increasing lengths and typically favor caching the beginning segments of media objects. However, these strategies typically do not consider the fact that most accesses are targeted toward a few popular objects. In(More)
proxy caching, streaming media, video transcoding, network measurements, streaming in wireless networks, streaming media distribution With the wide availability of high-speed network access, we are experiencing high quality streaming media delivery over the Internet. The emergence of ubiquitous computing enables mobile users to access the Internet with(More)
In this paper, the state estimation problem is investigated for a class of discrete time-delay nonlinear complex networks with randomly occurring phenomena from sensor measurements. The randomly occurring phenomena include randomly occurring sensor saturations (ROSSs) and randomly varying sensor delays (RVSDs) that result typically from networked(More)
The proliferation of multimedia content on the Inter-net poses challenges on existing content delivery networks. While proxy caching proves to be a successful approach to delivering traditional text-based static objects, it faces difficulties in delivering streaming media objects due to much larger sizes of media objects and rigorous continuous delivery(More)