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→{{resx|960|540}} (qHD) {{anchor|960x540|qHD|qHD (960x540)|qHD (960×540)}}: not "qFHD" nor 640*360 |
→{{resx|640|360}} (nHD) {{anchor|640x360|nHD|NHD|nHD (640x360)|nHD (640×360)}}: not "nFHD" nor 426*240 |
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=== {{resx|640|360}} (nHD) {{anchor|640x360|nHD|NHD|nHD (640x360)|nHD (640×360)}}===
'''nHD''' (ninth HD, not "nano HD") is a display resolution of {{resx|640|360}} pixels, which is exactly one-ninth of a Full HD (1080p) frame and one-quarter of an [[#HD (1280×720)|HD]] (720p) frame. Notably, it is neither "nFHD" nor {{resx|426|240}} which would be a about ninth of "HD" resolution. Pixel doubling (vertically and horizontally) nHD frames will form one 720p frame and pixel tripling nHD frames will form one 1080p frame.
One drawback of this resolution regarding encoding is that the number of lines is not an even multiple of 16, which is a common [[macroblock]] size for [[video codec]]s. Video frames encoded with {{times|16|16}} pixel macroblocks would be padded to {{resx|640|368}} and the added pixels would be cropped away at playback. H.264 codecs have this padding and cropping ability built-in as standard. The same is true for qHD and 1080p but the relative amount of padding is more for lower resolutions such as nHD.
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