Read the passage and write the main idea of it using not more than 3 sentences. YouTube originally offered videos at only one quality level, displayed at a resolution of 320×240 pixels using the Sorenson Spark codec (a variant of H.263), with mono MP3 audio. In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones. In March 2008, a high-quality mode was added, which increased the resolution to 480×360 pixels. In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 4096×3072 pixels. VouTube bac cince louorod the maximum rocelution to 2040x2160 pixols which is tuice
Read the passage and write the main idea of it using not more than 3 sentences. YouTube originally offered videos at only one quality level, displayed at a resolution of 320×240 pixels using the Sorenson Spark codec (a variant of H.263), with mono MP3 audio. In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones. In March 2008, a high-quality mode was added, which increased the resolution to 480×360 pixels. In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 4096×3072 pixels. VouTube bac cince louorod the maximum rocelution to 2040x2160 pixols which is tuice
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Read the passage and write the main idea of it using not more than 3 sentences.
YouTube originally offered videos at only one quality level, displayed at a resolution of 320x240
pixels using the Sorenson Spark codec (a variant of H.263), with mono MP3 audio. In June
2007, YouTube added an option to watch videos in 3GP format on mobile phones. In March
2008, a high-quality mode was added, which increased the resolution to 480×360 pixels.
In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube
player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature,
YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In
November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had
launched a range of videos in 4K format, which allows a resolution of up to 4096×3072 pixels.
YouTube has since lowered the maximum resolution to 3840×2160 pixels, which is twice as
many pixels in both directions as 1080p.
In June 2014, YouTube introduced videos playing at 60 frames per second, in order to
reproduce video games with a frame rate comparable to high-end graphics cards. The videos
play back at a resolution of 720p or higher.
YouTube videos are available in a range of quality levels. The former names of standard quality
(SQ), high quality (HQ) and high definition (HD) have been replaced by numerical values
representing the vertical resolution of the video. The default video stream is encoded in the VP9
format with stereo Opus audio; if VP9/WebM is not supported in the browser/device or the
browser's user agent reports Windows XP, then H.264/MPEG-4 AVC video with stereo AAC
audio is used instead.
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