Doom9's Forum - View Single Post - Capturing HDTV channels

pandy · 19th September 2008, 09:47

No, 1080i means that frame 1080 lines high is created from fields (at least two fields) so 1080i25 and 1080p25 are identical (with exception about interlaced/progressive) and means that 25 frames per second with 1080 lines is displayed and this frame can be build from at least 2 fields or is 1 frame, 1080p25 can be displayed as 1080i25 without problems (with exception for some details e.g. chroma sampling, but this is far from your question).

workflow is simple - You must detect type of source (ie interlaced vs progressive - ie did any temporal difference between two field of one frame exist - hint use AviSynth command: SeparateFields() )

19th September 2008, 09:47	#2 \| Link
pandy Registered User Join Date: Mar 2006 Posts: 1,049	No, 1080i means that frame 1080 lines high is created from fields (at least two fields) so 1080i25 and 1080p25 are identical (with exception about interlaced/progressive) and means that 25 frames per second with 1080 lines is displayed and this frame can be build from at least 2 fields or is 1 frame, 1080p25 can be displayed as 1080i25 without problems (with exception for some details e.g. chroma sampling, but this is far from your question). workflow is simple - You must detect type of source (ie interlaced vs progressive - ie did any temporal difference between two field of one frame exist - hint use AviSynth command: SeparateFields() ) Last edited by pandy; 19th September 2008 at 09:51.