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<blockquote data-quote="MLH01" data-source="post: 506582" data-attributes="member: 89532"><p>Deinterlacing is needed for digital TVs (LCD, plasma, ...). CRT TVs (analog) on the other hand work natively with the interlaced format, and therefore the program does not need to deinterlaced.</p><p></p><p>So, if the broadcast is being sent in an interlaced format, then it will need to be deinterlaced before displaying. The deinterlacing can be done by software or hardware (if the hardware/video card supports it). Software deinterlacing uses CPU resources, which can cause stuttering if the system is not up to the task. Higher resolutions (eg. 1080i HD programs) will be even more taxing to the system.</p><p></p><p>DVDs use the interlaced format. Blu ray dics are more commonly recorded in the non-interlaced format (progressive scanning).</p><p></p><p>See <a href="http://en.wikipedia.org/wiki/Deinterlacing" target="_blank">here</a> for more information.</p><p></p><p>On my system (SD digital broadcasts using CRT TV, using the inbuilt Vista MPEG2 video codec + inbuilt Vista MPEG1 audio codec + EVR), my CPU usage is around 5-10% on the MP home screen without the TV playing. It increases to ~30% when playing TV. I haven't checked the usage when playing a DVD recently, but vaguely remember it being around 30% as well.</p><p></p><p>This is all SD as I don't have a HD TV (yet). I'll be looking more closely into DXVA when I get a HD TV hopefully towards the end of this year <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> </p><p>MLH01.</p><p></p><p><strong>[EDIT]</strong></p><p>For Australian digital TV broadcasts, the following formats are used...</p><p></p><p>All channels use 576i for SD.</p><p></p><p>ABC HD = 720p</p><p>Channels 7, 9 & 10 HD=1080i</p><p>SBS HD = 576p</p><p></p><p>So for the commercial stations (7, 9 & 10), all high def content is broadcast in 1080i format requiring deinterlacing for display on LCD and plasma screens.</p><p><strong>[/EDIT]</strong></p><p></p><p><strong>[EDIT2]</strong></p><p>I did a bit more fiddling with codecs and DXVA. I checked the CPU usage when playing a DVD and it ranged from 20-35% (depending on background processes), which is similar to the usage when viewing SD digital TV.</p><p></p><p>I then installed and configured Mediaplayer Classic HomeCinema as per <a href="http://nunnally.ahmygoddess.net/watching-h264-videos-using-dxva/" target="_blank">these instructions</a>. I followed the instructions to the letter and downloaded the SD sample video. When playing the sample video using the MPC-HC application, it showed a status of "Playing (DXVA)", indicating that DXVA was indeed being used. The CPU usage during playback was around 25 to 35%.</p><p></p><p>From this, I assume that MediaPortal is using DXVA for DVDs (and probably TV viewing) based on similar CPU usage.</p><p><strong>[/EDIT2]</strong></p></blockquote><p></p>
[QUOTE="MLH01, post: 506582, member: 89532"] Deinterlacing is needed for digital TVs (LCD, plasma, ...). CRT TVs (analog) on the other hand work natively with the interlaced format, and therefore the program does not need to deinterlaced. So, if the broadcast is being sent in an interlaced format, then it will need to be deinterlaced before displaying. The deinterlacing can be done by software or hardware (if the hardware/video card supports it). Software deinterlacing uses CPU resources, which can cause stuttering if the system is not up to the task. Higher resolutions (eg. 1080i HD programs) will be even more taxing to the system. DVDs use the interlaced format. Blu ray dics are more commonly recorded in the non-interlaced format (progressive scanning). See [url="http://en.wikipedia.org/wiki/Deinterlacing"]here[/url] for more information. On my system (SD digital broadcasts using CRT TV, using the inbuilt Vista MPEG2 video codec + inbuilt Vista MPEG1 audio codec + EVR), my CPU usage is around 5-10% on the MP home screen without the TV playing. It increases to ~30% when playing TV. I haven't checked the usage when playing a DVD recently, but vaguely remember it being around 30% as well. This is all SD as I don't have a HD TV (yet). I'll be looking more closely into DXVA when I get a HD TV hopefully towards the end of this year :) MLH01. [B][EDIT][/B] For Australian digital TV broadcasts, the following formats are used... All channels use 576i for SD. ABC HD = 720p Channels 7, 9 & 10 HD=1080i SBS HD = 576p So for the commercial stations (7, 9 & 10), all high def content is broadcast in 1080i format requiring deinterlacing for display on LCD and plasma screens. [B][/EDIT][/B] [B][EDIT2][/B] I did a bit more fiddling with codecs and DXVA. I checked the CPU usage when playing a DVD and it ranged from 20-35% (depending on background processes), which is similar to the usage when viewing SD digital TV. I then installed and configured Mediaplayer Classic HomeCinema as per [url="http://nunnally.ahmygoddess.net/watching-h264-videos-using-dxva/"]these instructions[/url]. I followed the instructions to the letter and downloaded the SD sample video. When playing the sample video using the MPC-HC application, it showed a status of "Playing (DXVA)", indicating that DXVA was indeed being used. The CPU usage during playback was around 25 to 35%. From this, I assume that MediaPortal is using DXVA for DVDs (and probably TV viewing) based on similar CPU usage. [B][/EDIT2][/B] [/QUOTE]
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