Publication: Esteganografía sobre el estándar H.265/HEVC en el ámbito ferroviario
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2021-11-24
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Universidad Complutense de Madrid
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Abstract
El uso de pinturas desde tiempo inmemorables, así como su evolución a nuevos formatos de representación gráfica, como las imágenes, han sido usadas con diferentes motivos iconográficos y significados a lo largo del tiempo. A finales de los años 50 se alcanza un hito tecnológico, en el que se instaura la representación de escenas en movimiento gracias al empleo de una secuencia de imágenes mostradas a cierta velocidad. Con ello, surge la aparición del vídeo y sus capacidades implícitas de grabación y procesamiento; lo que permitió -como novedad- su almacenamiento, transmisión y posterior reconstrucción. Desde entonces, el vídeo ha sufrido un desarrollo sin precedentes, permitiendo el tratamiento de secuencias con un gran incremento de calidad visual, mayor duración y, en consecuencia, la creación obligatoria de nuevos estándares de codificación de video. Éstos permiten la compresión de los archivos asociados, lo que optimiza las capacidades de almacenamiento, así como la disminución en el tiempo de su transmisión por una red de comunicaciones...
Since time immemorial cave paintings, as well as their evolution into new formatis of graphic representations, such as images, have been used with different iconographic motifs and meanings throughout time. At the end of the fifties a technological relevant milestone was reached, in which the representation of motion scenes was established thanks to the use of a sequience of images shown at a certain speed. This provoked the emergence of digital video and its implicit recording and processing capabilities; which allowed -as a novelty- the storage, transmission and the reconstruction. Since then, video has had an unprecedented development, allowing the treatment of sequiences with higher and higher visual quiality, longer duration and, consequiently, pushed to create new video coding standards. All of them allow the compression of the video files, which optimizes storage capacities, as wall as the reduction of the transmission time trhough a communication network...
Since time immemorial cave paintings, as well as their evolution into new formatis of graphic representations, such as images, have been used with different iconographic motifs and meanings throughout time. At the end of the fifties a technological relevant milestone was reached, in which the representation of motion scenes was established thanks to the use of a sequience of images shown at a certain speed. This provoked the emergence of digital video and its implicit recording and processing capabilities; which allowed -as a novelty- the storage, transmission and the reconstruction. Since then, video has had an unprecedented development, allowing the treatment of sequiences with higher and higher visual quiality, longer duration and, consequiently, pushed to create new video coding standards. All of them allow the compression of the video files, which optimizes storage capacities, as wall as the reduction of the transmission time trhough a communication network...
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Tesis de la Universidad Complutense de Madrid, Facultad de Informática, leída el 8/02/2021