Abstract
AbstractThe transmission of video materials by digital compression has been widely applied in recent years. The following problems are involved in this approach. (1) A duplex system composed of main and backup links is often used in the transmission of video materials. Thus, the transmission capacity of the backup system becomes redundant in the normal state. (2) No automatic image quality monitoring method for video transmission has been established. On the other hand, the coding/decoding techniques for digital video transmission are almost fully established, and various devices are already widely used. Thus, it is highly desirable to reduce the above redundancy, that is, to achieve highly efficient automatic picture quality monitoring. Consequently, this paper proposes a flat multiscalable video transmission scheme in which highly efficient and highly reliable video transmission with automatic picture quality monitoring can be realized by simply adding pre‐ and postprocessing, without modifying the existing coding/decoding devices. In the proposed scheme, noise cancellation by averaging and high picture quality are realized by processing that reduces the correlation of coding noise in the decoded video pictures of the two systems. The SN ratios of the received video and the original pictures can be estimated from the residual correlation. The proposed scheme can be applied not only to improving the efficiency of video materials transmission, but also to improving the reliability of picture transmission over the Internet. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 86(7): 42–53, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.1168
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