This article may be too technical for most readers to understand.(April 2022) |
MUSE (Multiple sub-Nyquist Sampling Encoding),[1] commercially known as Hi-Vision (a contraction of HIgh-definition teleVISION)[1] was a Japanese analog high-definition television system, with design efforts going back to 1979.[2]
It used dot-interlacing and digital video compression to deliver 1125 line, 60 field-per-second (1125i60) [2] signals to the home. The system was standardized as ITU-R recommendation BO.786[3] and specified by SMPTE 260M,[4] using a colorimetry matrix specified by SMPTE 240M.[5] As with other analog systems, not all lines carry visible information. On MUSE there are 1035 active interlaced lines, therefore this system is sometimes also mentioned as 1035i.[6] It employed 2-dimensional filtering, dot-interlacing, motion-vector compensation and line-sequential color encoding with time compression to "fold" an original 20 MHz bandwidth source signal into just 8.1 MHz.
Japan began broadcasting wideband analog HDTV signals in December 1988,[7] initially with an aspect ratio of 2:1. The Sony HDVS high-definition video system was used to create content for the MUSE system.[2] By the time of its commercial launch in 1991, digital HDTV was already under development in the United States. Hi-Vision was mainly broadcast by NHK through their BShi satellite TV channel.
On May 20, 1994, Panasonic released the first MUSE LaserDisc player.[8] There were also a number of players available from other brands like Pioneer and Sony.
Hi-Vision continued broadcasting in analog until 2007.
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