{"id":1311,"date":"2003-11-25T16:56:11","date_gmt":"2003-11-25T05:56:11","guid":{"rendered":"http:\/\/hifi-writer.com\/wpblog\/?p=1311"},"modified":"2010-03-14T11:30:07","modified_gmt":"2010-03-14T00:30:07","slug":"resolution-misconceptions","status":"publish","type":"post","link":"http:\/\/hifi-writer.com\/wpblog\/?p=1311","title":{"rendered":"Resolution Misconceptions"},"content":{"rendered":"

I keep on finding the claim that progressive scan video necessarily gives a high resolution than interlaced video. For example, take this from AudioVideo101.com<\/a>:<\/p>\n

HDTV signals broadcast at 60 Hz, the standard for broadcast television, vary in what scanning format is used. The highest resolution format (1,920 x 1,080) is presented using interlaced scanning while the 1,280 by 720 format uses progressive scanning. Thus, the 1,280 by 720 format presents a complete 921,600 pixels 60 times per second. However, the 1,920 by 1,080 format presents only half of its total resolution every 1\/60th of a second (1,036,800 pixels 60 times per second or 2,073,600 pixels 30 times per second). In essence, then, at a 60 Hz refresh rate, the true resolution of the two HDTV formats (what is presented every 1\/60th of a second) is very similar. <\/span><\/p><\/blockquote>\n

This is true only in the case of material sourced from a progressive scan video recorder. It is not<\/strong> true with film-sourced movies. These are filmed at 24 frames per second. Progressive scan transmission at 50 hertz involves repeating every single telecined<\/a> line twice. It’s a bit more complicated in 60 hertz countries since each line is shown 2.5 times. The ‘resolution’ in the sense of the amount of data carried by a progressive scan system is higher than the interlaced version, for sure. But the ‘resolution’ as used in common parlance — the amount of picture detail you see on screen — is, in the case of film sourced material (ie. virtually all movies), identical<\/em> in the progressive scan and interlaced versions. It’s just that the progressive scan version carries a huge amount of redundancy.<\/p>\n","protected":false},"excerpt":{"rendered":"

I keep on finding the claim that progressive scan video necessarily gives a high resolution than interlaced video. For example, take this from AudioVideo101.com: HDTV signals broadcast at 60 Hz, the standard for broadcast television, vary in what scanning format … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,27,5],"tags":[],"_links":{"self":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts\/1311"}],"collection":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1311"}],"version-history":[{"count":3,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts\/1311\/revisions"}],"predecessor-version":[{"id":1319,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=\/wp\/v2\/posts\/1311\/revisions\/1319"}],"wp:attachment":[{"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1311"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/hifi-writer.com\/wpblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}