{"id":4600,"date":"2025-10-24T16:14:44","date_gmt":"2025-10-24T14:14:44","guid":{"rendered":"http:\/\/www.bascaran.com\/autor\/?p=4600"},"modified":"2025-10-25T07:11:23","modified_gmt":"2025-10-25T05:11:23","slug":"test","status":"publish","type":"post","link":"https:\/\/www.bascaran.com\/autor\/test\/","title":{"rendered":"T es t"},"content":{"rendered":"<hr>\n<hr>\n<h4>T es t<\/h4>\n<p>Investigaci\u00f3n y experimentaci\u00f3n con la carta de ajuste&nbsp;<\/p>\n\n\n<div style=\"height:28px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-video\"><video controls src=\"http:\/\/www.bascaran.com\/autor\/wp-content\/uploads\/2025\/10\/Video_instalacion.mp4\"><\/video><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-video\"><video controls src=\"http:\/\/www.bascaran.com\/autor\/wp-content\/uploads\/2025\/10\/video_instalacion_06.mp4\"><\/video><figcaption>Descomposici\u00f3n por colores luz<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>Historia y fundamentos de la carta de ajuste en v\u00eddeo.<\/p>\n\n\n\n<p>La carta de ajuste, tambi\u00e9n conocida como test pattern o test card, es una de las im\u00e1genes m\u00e1s reconocibles de la historia del v\u00eddeo y la televisi\u00f3n. Su origen se remonta a los primeros a\u00f1os de la televisi\u00f3n anal\u00f3gica, cuando los t\u00e9cnicos necesitaban una imagen fija para ajustar brillo, contraste, enfoque y geometr\u00eda antes de iniciar las emisiones.<\/p>\n\n\n\n<p>En los a\u00f1os 40, la RCA populariz\u00f3 la \u201cIndian Head Test Pattern\u201d, una carta en blanco y negro con una cabeza ind\u00edgena rodeada de c\u00edrculos y escalas de gris. Durante d\u00e9cadas fue el est\u00e1ndar de calibraci\u00f3n en Estados Unidos y s\u00edmbolo del inicio de las transmisiones. <\/p>\n\n\n\n<p>Con la llegada del color en los a\u00f1os 60, las cartas se volvieron m\u00e1s complejas. Aparecen las barras de color SMPTE y patrones como la Philips PM5544 (1970), con su ic\u00f3nico c\u00edrculo central, cuadr\u00edculas y tonos primarios y secundarios. En Europa, esta carta se emit\u00eda con m\u00fasica instrumental o un tono continuo cuando no hab\u00eda programaci\u00f3n, marcando el tiempo de espera entre emisiones. <\/p>\n\n\n\n<p>En la era digital, las cartas de ajuste han perdido su funci\u00f3n pr\u00e1ctica, ya que los sistemas modernos se calibran autom\u00e1ticamente. Sin embargo, su poder simb\u00f3lico se ha multiplicado: la carta de ajuste representa hoy la ausencia de emisi\u00f3n, el silencio del medio o el instante previo a la imagen. Artistas visuales y videocreadores la reinterpretan como met\u00e1fora del error, de la pausa y del propio artificio televisivo.<\/p>\n\n\n\n<p>T\u00e9cnicamente, una carta de ajuste sirve para calibrar:<\/p>\n\n\n\n<p>Geometr\u00eda y centrado (rejillas y c\u00edrculos conc\u00e9ntricos).<\/p>\n\n\n\n<p>Resoluci\u00f3n (l\u00edneas finas alternadas).<\/p>\n\n\n\n<p>Luminancia (escala de grises).<\/p>\n\n\n\n<p>Crominancia (barras de color).<\/p>\n\n\n\n<p>Sincron\u00eda (cruces centrales).<\/p>\n\n\n\n<p>Audio (tono de referencia a 1 kHz).<\/p>\n\n\n\n<p>Su evoluci\u00f3n puede resumirse as\u00ed:<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>T es t Investigaci\u00f3n y experimentaci\u00f3n con la carta de ajuste&nbsp; Historia y fundamentos de la carta de ajuste en v\u00eddeo. La carta de ajuste,&hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[46],"tags":[],"class_list":["post-4600","post","type-post","status-publish","format-standard","hentry","category-videoarte"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"photograph-popular-post":false},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/www.bascaran.com\/autor\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"T es t Investigaci\u00f3n y experimentaci\u00f3n con la carta de ajuste&nbsp; Historia y fundamentos de la carta de ajuste en v\u00eddeo. La carta de ajuste,&hellip;","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.2.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>T es t - V&iacute;ctor Bascar&aacute;n<\/title>\n<meta name=\"description\" content=\"Las fotos y v\u00eddeo de boda de tus sue\u00f1os. Fot\u00f3grafos en Valencia.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bascaran.com\/autor\/test\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T es t - V&iacute;ctor Bascar&aacute;n\" \/>\n<meta property=\"og:description\" content=\"Las fotos y v\u00eddeo de boda de tus sue\u00f1os. 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