데이터 관리 시스템 및 데이터 관리 방법

The present invention relates to a format conversion of multimedia content (modality conversion) to support QoS (Quality of Service) in the ubiquitous (ubiquitous) computing environment. Recently, devices that consume a wide variety of multimedia content such as HDTV, PDA, cell phone, MP3 player and there has appeared in a variety of content formats and services such as video, audio, and graphics. The consumer multimedia experience with these various content and various devices can not be adjusted to the quality of service (QoS) methods only unique content scaling (content scaling) within the existing single content type. The present invention includes a format conversion to the QoS under multimedia environments consumption. Format conversion makes it possible to maintain the quality of service such as the delivery and consumption of content by providing a heterogeneous content format conversion method under various multimedia consumption environment. The most important issues (懸案) look at the format conversion from a QoS perspective, "under which resources (資源) Characteristics That Should the current format conversion to other formats under constraint?" That is how to locate the boundary between the converted format to the core of the format conversion for QoS. Thus the invention provides a method to find the conversion boundaries between these types.