{"id":2482,"date":"2025-03-22T13:14:05","date_gmt":"2025-03-22T13:14:05","guid":{"rendered":"https:\/\/szmz.hu\/teaching\/?page_id=2482"},"modified":"2025-03-22T15:05:47","modified_gmt":"2025-03-22T15:05:47","slug":"mediahistory-dividing-encoding-and-transmitting-information","status":"publish","type":"page","link":"https:\/\/szmz.hu\/teaching\/media-history\/mediahistory-dividing-encoding-and-transmitting-information\/","title":{"rendered":"MediaHistory: Dividing, Encoding and Transmitting Information"},"content":{"rendered":"\n<p class=\"has-large-font-size\"><strong>I. Analog versus digital<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Wax Recording History - Media Recording History 1870-1900\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/QZZqta2LVWo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Edison Wax Recording, Guitar &amp; Vocals\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/4wtifAGsV3k?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Basile_Bouchon_1725_loom.jpg\" alt=\"\" class=\"wp-image-2485\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Basile_Bouchon_1725_loom.jpg 1024w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Basile_Bouchon_1725_loom-300x225.jpg 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Basile_Bouchon_1725_loom-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Weaving machinery by Basile Bouchon from 1725, improved by Jean Baptiste Falcon three years later<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2-1024x1024.jpg\" alt=\"\" class=\"wp-image-2488\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2-1024x1024.jpg 1024w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2-300x300.jpg 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2-150x150.jpg 150w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2-768x768.jpg 768w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2-1536x1536.jpg 1536w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/vanconson-loom-collage-2.jpg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Vaucanson&#8217;s automatic weaving machinery, cca. 1740<br><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Deutsches_Technikmuseum_Berlin_February_2008_0013.jpg\" alt=\"\" class=\"wp-image-2491\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Deutsches_Technikmuseum_Berlin_February_2008_0013.jpg 1024w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Deutsches_Technikmuseum_Berlin_February_2008_0013-300x225.jpg 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/1024px-Deutsches_Technikmuseum_Berlin_February_2008_0013-768x576.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">punchcards in Jacquard&#8217;s weaving machine (Jacquard introduced his first loom in 1801, later designed several improved versions)<\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"1024\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/jacquard_silk_portrait1839-799x1024.jpg\" alt=\"\" class=\"wp-image-2494\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/jacquard_silk_portrait1839-799x1024.jpg 799w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/jacquard_silk_portrait1839-234x300.jpg 234w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/jacquard_silk_portrait1839-768x985.jpg 768w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/jacquard_silk_portrait1839.jpg 1177w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><\/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-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"729\" height=\"1024\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/Machine-loomed_silk_portrait_of_Joseph-Marie_Jacquard_Wellcome_L0020370-729x1024.jpg\" alt=\"\" class=\"wp-image-2497\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/Machine-loomed_silk_portrait_of_Joseph-Marie_Jacquard_Wellcome_L0020370-729x1024.jpg 729w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/Machine-loomed_silk_portrait_of_Joseph-Marie_Jacquard_Wellcome_L0020370-214x300.jpg 214w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/Machine-loomed_silk_portrait_of_Joseph-Marie_Jacquard_Wellcome_L0020370-768x1079.jpg 768w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/Machine-loomed_silk_portrait_of_Joseph-Marie_Jacquard_Wellcome_L0020370-1093x1536.jpg 1093w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/Machine-loomed_silk_portrait_of_Joseph-Marie_Jacquard_Wellcome_L0020370.jpg 1186w\" sizes=\"auto, (max-width: 729px) 100vw, 729px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>Machine-loomed silk portrait of Joseph-Marie Jacquard, 1839 (24000 punchcards stored the data of the entire image which was produced exclusively on order)<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Fiber artist Lia Cook talks about her Jacquard loom\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/7E9G9QATIGg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><strong>II. Picture transmission<\/strong><\/p>\n\n\n\n<p>Early picture-transmission procedures are ancestors of the telefax:<br>&#8211; 1842-46 Alexander Bain (1811 \u2013 1877) scottish engineer and inventor develops an experimental image transmitting telegraph<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/coimages.sciencemuseumgroup.org.uk\/34\/559\/medium_1888_0198__0001_.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">Alexander Bain&#8217;s chemical telegraph, unknown maker, England, 1850.<\/figcaption><\/figure>\n\n\n\n<p>&#8211; 1851 Frederick Collier Bakewell (1800 \u2013 1869) English physicist presents his improved picture-telegraph on the world expo in London<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 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-image size-large\"><img decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/b\/bb\/Bakewell_improved_facsimile_1848.png\" alt=\"\"\/><\/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-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"745\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph01.png\" alt=\"\" class=\"wp-image-2536\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph01.png 1000w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph01-300x224.png 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph01-768x572.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"755\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph02.png\" alt=\"\" class=\"wp-image-2539\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph02.png 1000w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph02-300x227.png 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Bakewell_telegraph02-768x580.png 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"The Secret Life of the Fax Machine - Remastered\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/yuUyt9RG7pk?list=PLtaR0lZhSyAPLuoSbMA29s3Ry8ZUvKff3\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>&#8211; 1856 Giovanni Caselli (1815 \u2013 1891) italian physicist presents his picture transmitting system (the Pantelegraph)<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/c\/cd\/Replica_di_pantelegrafo_di_Caselli_-_Museo_scienza_tecnologia_Milano_02145_2004.jpg\" alt=\"\"\/><\/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-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"608\" height=\"614\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo.png\" alt=\"\" class=\"wp-image-2542\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo.png 608w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo-297x300.png 297w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo-150x150.png 150w\" sizes=\"auto, (max-width: 608px) 100vw, 608px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p>The Pantelegraph used a regulating clock with a pendulum which made and broke the current for magnetizing its regulators, and ensured that the transmitter&#8217;s scanning stylus and the receiver&#8217;s writing stylus remained in step. <\/p>\n\n\n\n<p>To provide a time base, a large pendulum was used weighing 8 kg (18 lb), mounted on a frame 2 m (6 ft 7 in) high. Two messages were written with insulating ink on two fixed metal plates; one plate was scanned as the pendulum moved to the right and the other as the pendulum moved to the left, so that two messages could be transmitted per cycle.<\/p>\n\n\n\n<p>The receiving apparatus reproduced the transmitted image by means of paper impregnated with potassium ferricyanide, which darkened when an electric current passed through it from the synchronized stylus. In operation the Pantelegraph was relatively slow; a sheet of paper 111 mm \u00d7 27 mm, with about 25 handwritten words, took 108 seconds to transmit.<\/p>\n\n\n\n<p>The most common use of the Pantelegraph was for signature verification in banking transactions.<\/p>\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-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"1024\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo02-695x1024.png\" alt=\"\" class=\"wp-image-2545\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo02-695x1024.png 695w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo02-204x300.png 204w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo02-768x1131.png 768w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo02.png 1000w\" sizes=\"auto, (max-width: 695px) 100vw, 695px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 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-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"462\" height=\"493\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo03.png\" alt=\"\" class=\"wp-image-2548\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo03.png 462w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo03-281x300.png 281w\" sizes=\"auto, (max-width: 462px) 100vw, 462px\" \/><\/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-image alignright size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"455\" height=\"490\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo04.png\" alt=\"\" class=\"wp-image-2551\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo04.png 455w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Casellini_Pantelegrafo04-279x300.png 279w\" sizes=\"auto, (max-width: 455px) 100vw, 455px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p><strong>&#8211; 1884 Jan. 3: Paul Gottlieb Nipkow (1860 \u2013 1940) german inventor patents his picture scanning and transmitting system based on the spirally perforated rotating disk, the Nipkow-disk.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"560\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mechanical-television-1024x560.png\" alt=\"\" class=\"wp-image-2554\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mechanical-television-1024x560.png 1024w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mechanical-television-300x164.png 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mechanical-television-768x420.png 768w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mechanical-television.png 1152w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"32 lines nipkow disc television demo.MOV\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/D-yO07MQPMA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Televisor 3 - Mechanical Television\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/8GYGxEk0btA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>&#8211; 1889 L. Weiller describes the mirror-prism, a system of mirror elements spirally arranged around a shaft:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"612\" height=\"558\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Neon_Crater_Lamp-Mirror_Drum_Sys.jpg\" alt=\"\" class=\"wp-image-2557\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Neon_Crater_Lamp-Mirror_Drum_Sys.jpg 612w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Neon_Crater_Lamp-Mirror_Drum_Sys-300x274.jpg 300w\" sizes=\"auto, (max-width: 612px) 100vw, 612px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 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-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"368\" height=\"248\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mirdrum1.jpg\" alt=\"\" class=\"wp-image-2560\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mirdrum1.jpg 368w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mirdrum1-300x202.jpg 300w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\" \/><\/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-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"368\" height=\"248\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mirdrum2.jpg\" alt=\"\" class=\"wp-image-2563\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mirdrum2.jpg 368w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06mirdrum2-300x202.jpg 300w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"John Logie Baird describes first television\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/PmjXwU0pYao?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>John Logie Baird 1928-ban presented his first color-television system, using a Nipkow disk divided into three parts(R,G,B).<\/p>\n\n\n\n<figure class=\"wp-block-image alignwide size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"382\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Baird_colortvsw-tel_5-38-0002.jpg\" alt=\"\" class=\"wp-image-2566\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Baird_colortvsw-tel_5-38-0002.jpg 750w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06Baird_colortvsw-tel_5-38-0002-300x153.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<p>In 1938 Baird constructed a color projector based on the same principles &#8211; instead of nipkow-disk it was using a mirror drum.&nbsp;<a href=\"http:\/\/www.earlytelevision.org\/pdf\/electronics_world_7-87.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.earlytelevision.org\/pdf\/electronics_world_7-87.pdf<\/a><\/p>\n\n\n\n<p>CBS developed a color television system with exceptional color fidelity, but due to its incompatibility with earlier black and white TV sets it did not become a standard.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 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-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"447\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06RCACT-100CBSColor.jpg\" alt=\"\" class=\"wp-image-2569\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06RCACT-100CBSColor.jpg 501w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06RCACT-100CBSColor-300x268.jpg 300w\" sizes=\"auto, (max-width: 501px) 100vw, 501px\" \/><\/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-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"634\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06CBS_Field_col_DOROTHY_800_634_H.jpg\" alt=\"\" class=\"wp-image-2572\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06CBS_Field_col_DOROTHY_800_634_H.jpg 800w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06CBS_Field_col_DOROTHY_800_634_H-300x238.jpg 300w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/06CBS_Field_col_DOROTHY_800_634_H-768x609.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 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-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"395\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBS_Color_002a.jpeg\" alt=\"\" class=\"wp-image-2575\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBS_Color_002a.jpeg 480w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBS_Color_002a-300x247.jpeg 300w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/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-image alignright size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"458\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBS_Columbia_003a.jpeg\" alt=\"\" class=\"wp-image-2578\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBS_Columbia_003a.jpeg 480w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBS_Columbia_003a-300x286.jpeg 300w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-image alignwide size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"388\" src=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBScolour3.jpg\" alt=\"\" class=\"wp-image-2581\" srcset=\"https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBScolour3.jpg 600w, https:\/\/szmz.hu\/teaching\/wp-content\/uploads\/2025\/03\/CBScolour3-300x194.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"The Secret Life of theTelevision - Remastered\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/dEW8QoJ-5Co?list=PLtaR0lZhSyAPLuoSbMA29s3Ry8ZUvKff3\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"The Secret Life of the Videorecorder - Remastered\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/g1JlUcFKm5o?list=PLtaR0lZhSyAPLuoSbMA29s3Ry8ZUvKff3\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>I. Analog versus digital Machine-loomed silk portrait of Joseph-Marie Jacquard, 1839 (24000 punchcards stored the data of the entire image which was produced exclusively on order) II. Picture transmission Early picture-transmission procedures are ancestors of the telefax:&#8211; 1842-46 Alexander Bain (1811 \u2013 1877) scottish engineer and inventor develops an experimental image transmitting telegraph &#8211; 1851 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":892,"menu_order":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2482","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/pages\/2482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/comments?post=2482"}],"version-history":[{"count":4,"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/pages\/2482\/revisions"}],"predecessor-version":[{"id":2587,"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/pages\/2482\/revisions\/2587"}],"up":[{"embeddable":true,"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/pages\/892"}],"wp:attachment":[{"href":"https:\/\/szmz.hu\/teaching\/wp-json\/wp\/v2\/media?parent=2482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}