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In this paper, we propose a new scheme of layered video coding for real-time streaming and lossless archive. The proposed layered video coding provides a delay scalability which is not supported by the conventional scalable coding methods. Motion JPEG2000 is performed as a base layer coder for real-time streaming and an inter-frame coder is used as an enhancement layer coder to enhance lossless coding...
Digital Cinema is a promising application that utilizes high-speed optical networks to transfer super high definition images. The networks are primary used for distributing packet data of digital cinema contents, and are also used to support new services such as the live streaming of musicals and sports games to movie theaters. While current transfer services offer HD quality video, live streaming...
A new bit allocation scheme for JPEG 2000 systems in parallel-distributed environments is proposed. In recent years, super high-definition images are being used for not only digital cinema also alternative services e.g. real-time sports in theaters. In general, such high-definition images are divided into small segments, such as tiles or components, and compressed. However, this process leads to low...
This paper introduces layered low-density generator matrix (Layered-LDGM) codes for scalable video streaming data. The layered-LDGM codes maintain the arbitrary relationship of each layer from the encoder side to the decoder side. This resulting structure supports partial decoding. Furthermore, the proposed codes create forward error correcting (FEC) packets that considers the relationship between...
This paper proposes the hierarchical encryption of Motion JPEG 2000 code streams for layered multicast transmission. JPEG 2000 generates hierarchical code streams and offers flexible scalability in characteristics such as resolution and SNR. The layered multicast encryption proposal allows a sender to multicast hierarchical encrypted JPEG 2000 code streams such that only designated groups of users...
Distributed video coding (DVC) is attracting attention as a paradigm for video compression. One reason is that it transfers the high complexity computation to the decoder. However, the DVC decoder that uses channel coding based on a belief propagation algorithm has complexity exceeding that of the H.264/AVC encoder. This paper proposes a parallelized DVC scheme that treats each bitplane independently...
Flickering is a temporal visual artifact that affects compressed video. It is prominent in intra-frame video coders and is largely the result of content variations and quantization. We concentrate on flickering due to quantization. JPEG2000 uses post-compression quantization which is applied through the EBCOT algorithm. EBCOT has been found, however, to cause significant flickering in the reconstructed...
Video sequences encoded with JPEG2000 exhibit flicker artifact. This artifact is not perceivable in still images. In contrast, it is perceived in the temporal domain and is the result of two factors: (a) the image content, and (b) the EBCOT post-compression rate allocation. In this work, we address the second factor. First, we propose an intra-frame rate-allocation scheme that ensures uniform error...
Distributed video coding (DVC), based on the theorems proposed by Slepian-Wolf and Wyner-Ziv, is attracting attention as a new paradigm for video compression. In DVC systems, several encoders will send bit streams to a single decoder which must handle all incoming bit streams. Some of the DVC systems use intraframe compression based on DCT. However, conventional DVC systems have low affinity with...
We describe a patient with Ramsay Hunt syndrome and varicella-zoster virus encephalitis. The coexistence of these conditions is rare and to our knowledge has not been clearly documented in the English-language literature. We summarize the clinical characteristics of our patient and seven similar patients described in previous reports, including those published in Japanese. Although concomitant diseases...
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