Editing Television (section)

====LD====
{{main|Low-definition television}}

Low-definition television or LDTV refers to television systems that have a lower screen resolution than standard-definition television systems such [[240p]] (320*240). It is used in [[handheld television]]. The most common source of LDTV programming is the Internet, where mass distribution of higher-resolution [[video file]]s could overwhelm [[computer server]]s and take too long to download. Many mobile phones and portable devices such as [[Apple Inc.|Apple]]'s [[iPod Nano]], or Sony's [[PlayStation Portable]] use LDTV video, as higher-resolution files would be excessive to the needs of their small screens ([[QVGA|320×240]] and 480×272 [[pixel]]s respectively). The current generation of iPod Nanos has LDTV screens, as do the first three generations of [[iPod Touch]] and [[iPhone]] (480×320). For the first years of its existence, YouTube offered only one low-definition resolution of 320x240p at 30fps or less. A standard, consumer-grade [[videotape]] can be considered SDTV due to its resolution (approximately 360 × 480i/576i).