This paper proposes a bitstream scaling technique for MPEG video for the purpose of media synchronizations. The proposed scaling technique can reduce the frame rate as well as the bit rate of an MPEG data sequence to ...
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This paper proposes a bitstream scaling technique for MPEG video for the purpose of media synchronizations. The proposed scaling technique can reduce the frame rate as well as the bit rate of an MPEG data sequence to fit them to the values specified by a synchronization system. The advantage of the proposed technique over existing scaling methods is that it is considering not only the performance of synchronization but also the picture quality of the resulting sequences. To further improve the quality of sequences scaled by the proposed method, this paper also proposes an MPEG encoding technique which sets some of the parameters suitable for the scaling. An experiment using these techniques in an actual media synchronization system has illustrated the usefulness of the proposed approach.
This paper presents a confederation of tools, called Corah that combine to support the real-time capture of and subse-quent access to informal collaborative activities. The tools provide the means to initiate digital ...
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ISBN:
(纸本)0201877740
This paper presents a confederation of tools, called Corah that combine to support the real-time capture of and subse-quent access to informal collaborative activities. The tools provide the means to initiate digital multimedia recordings, a variety of methods to index ihose recordings, and w;wmo retrieve the indexed material in other settings. The current system emerged from a convergence of the Where Were We multimedia work, the Tivoli LivcBoard application, and the Inter-Language Unification distributed-object programming infrastructure. We are working with a specific user commit nity and application domain, which has helped us shape a particular, demonstrably useful, configuration of tools and to get extensive real-world experience with them. This domain involves frequent discussion and decision-making meetings and later access of the captured records of those meetings to produce accurate documentation. Several aspects ofCoral— the application tools, the architecture of the confederation, and the multimedia infrastructure—are described.
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