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Hauppauge PVR-150 MCE full fields question
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<blockquote data-quote="gxtracker" data-source="post: 21144" data-attributes="member: 14004"><p>Taipan,</p><p></p><p>I had a chance to re-read over my post and managed to confuse myself. :lol: Let me try to explain what I mean a little better:</p><p></p><p>Like you said, all NTSC broadcasts have 2 fields - the even lines and odd lines. because of how the fields are interlaced, televisions can display 60 fields per second.</p><p></p><p>The important thing to note is that this isnt true 60 <u>Frames</u> per second, because each field is offset from the last one. To the average viewer though, they see 60 updates per second.</p><p></p><p>Now, what a lot of TV cards do, is only sample the analog video at 30 <u>frames</u> per second, because the manufacturer knows that most people watch drama shows, or cartoons, or whatever other content that has a frame rate no greater than 30 frames per second.</p><p></p><p>Television sporting events on the other hand, use high quality cameras that actually display content at 60 fields per second, giving your football or racing event very fluid, smooth video.</p><p></p><p>My concern is if the PVR-150 which im looking at purchasing will display straight tv watching at the full 60 fields per second, or will it lower the sampling rate to 30 frames per second because it has to go through the encoder chip onboard.</p><p></p><p>its a hard symptom to describe unfortunatly, its really some thing that once you see it for yourself, you understand it, and since I cant record a sample to demonstrate what im asking, that makes things even tougher. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p></blockquote><p></p>
[QUOTE="gxtracker, post: 21144, member: 14004"] Taipan, I had a chance to re-read over my post and managed to confuse myself. :lol: Let me try to explain what I mean a little better: Like you said, all NTSC broadcasts have 2 fields - the even lines and odd lines. because of how the fields are interlaced, televisions can display 60 fields per second. The important thing to note is that this isnt true 60 [u]Frames[/u] per second, because each field is offset from the last one. To the average viewer though, they see 60 updates per second. Now, what a lot of TV cards do, is only sample the analog video at 30 [u]frames[/u] per second, because the manufacturer knows that most people watch drama shows, or cartoons, or whatever other content that has a frame rate no greater than 30 frames per second. Television sporting events on the other hand, use high quality cameras that actually display content at 60 fields per second, giving your football or racing event very fluid, smooth video. My concern is if the PVR-150 which im looking at purchasing will display straight tv watching at the full 60 fields per second, or will it lower the sampling rate to 30 frames per second because it has to go through the encoder chip onboard. its a hard symptom to describe unfortunatly, its really some thing that once you see it for yourself, you understand it, and since I cant record a sample to demonstrate what im asking, that makes things even tougher. :( [/QUOTE]
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