Effective encoding of TV-Anytime metadata using EXI

Abstract

The TVA metadata allows consumers to find, navigate, and manage contents through a variety of terminal devices including PDR, DTV, and IPTV. In general, a TVA metadata description is delivered from a content provider to a terminal device over a transport link. Because such metadata description can become very large, it is essential to encode each fragment of the metadata description in a compressed format before the delivery and then decode the encoded fragments at the terminal device. This paper proposes a new encoding procedure for TVA metadata based on the EXI and presents performance comparison results between the proposed encoding procedure and the existing TVA encoding procedure.

Análisis de Esquemas de Metadatos para la Marcación de Contenidos Multimedia en Televisión Digital

“…De igual manera, teniendo en cuenta la revisión bibliográfica realizada, se observó que dentro del conjunto de esquemas de metadatos cuyo objetivo principal son los contenidos de televisión, TVA es el más utilizado, especialmente en trabajos de investigación tales como (Hyun-Cheol et al, 2008) (Sotelo et al, 2009) (Blanco-Fernández et al, 2011) (Qingjun et al, 2011) (Young-Guk et al, 2011 entre muchos otros. Sin embargo, a pesar de lo anterior y de que la esencia de TVA es realizar una descripción del contenido que contribuya en el soporte de experiencias personalizadas del televidente, MPEG-7 es el estándar con más influencia en el campo de la marcación de contenidos multimedia (Rey-López, 2009).…”

The global string table based TVA metadata encapsulation architecture

“…Most of the string table based methods including EXI use several string tables to encode string values or elements [2,4]. The encoding performance of string table based method depends on the average string hit ratio of TVA fragments encapsulated into data containers.…”

“…The encoding methods such as Efficient XML Interchange (EXI) and Gnu-ZIP (GZIP) could be used to encode the TVA fragments into binary XML documents while the fragments are encapsulated [2,4].…”

“…Many IPTV and digital broadcasting service providers use the Extended Markup Language (XML) to describe their service description because of its intuitive text based description method [1,2]. TV-Anytime (TVA) defines the syntax and encapsulation protocol to describe digital broadcasting service guides.…”