Antonio Navarro

Learn More
This paper addresses video transcoding from H.264/AVC into MPEG-2 with reduced complexity and high rate-distortion efficiency. While the overall concept is based on a cascaded decoder–encoder, the novel adaptation methods developed in this work have the advantage of providing very good performance in H.264/AVC to MPEG-2 transcoding. The proposed approach(More)
Video transcoding is assuming an important role in modern video communication systems in order to allow interoperability between different equipment and standards. So far most effort has been spent in transcoding from older standards to the most recent ones. However, as new standards reach higher levels of compression efficiency, the diversity of bitstream(More)
The aim of this exploratory paper is to fill an important gap in the international marketing literature by examining the influence of firm behavior in foreign markets (export commitment and adaptation of marketing tactics) on perceived competitive advantages and export performance. Using a sample of 150 Spanish export firms, the study found that firms that(More)
The main purpose of this paper is to show that once the video source coding is dependent on the channel characteristics, better performance can be achieved in terms of reconstructed video quality. Our study considers a fixed overall bit rate transmission of 64 kbit/s over error prone memoryless binary channels and the source coder is the ITU-T H.263 video(More)
HEVC is the latest video coding standard aimed to compress double to that of its predecessor standard H.264/AVC at the cost of increased coding complexity. Motion Estimation (ME) is one of its critical tools in the encoder whose complexity drastically increases due to the increase in coding block size to 64×64 and due to the introduction of(More)
In this paper, we present an adaptive scheme for forward error protection of any video coding standard. The channel coding rate changes according to the channel bit error rate (BER). The results are impressive. For instance, a PSNR gain of about 16.7 dB is obtained at BER=10 for “Foreman” video sequence, encoded either by H.263 or by MPEG-4 and protected(More)
This paper describes the DTC approach to the development of applications based on markup languages. DTC consistently combines componentware and markup technologies in a unified solution. Building an application according DTC supposes, on one hand, the provision of the set of documents describing the application at a purely declarative level (i.e. content,(More)
The GMF4iTV project (Generic Media Framework for Interactive Television) is an IST European project that developed an end-to-end broadcasting platform providing interactivity on heterogeneous multimedia devices such as Set-Top-Boxes, PCs and PDAs according to the Multimedia Home Platform (MHP) part of the DVB standard. The developed platform allows the(More)