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• #74788 gduck addikt ΞΔGLΞ #74787

  Új Válasz 2019-01-30 07:47:52 #74788

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  válasz ΞΔGLΞ #74787 üzenetére

  Akkor egyszerű a képlet, 30 év múlva 2049-ben, nálunk is lesz 8K

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• #74803 headhunter addikt ΞΔGLΞ #74787

  Új Válasz 2019-01-30 17:06:01 #74803

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  válasz ΞΔGLΞ #74787 üzenetére

  "...On November 2, 2006, NHK demonstrated a live relay of a UHDTV program over a 260 kilometer (km) distance by a fiber-optic network.[31] Using dense wavelength division multiplex (DWDM), 24 Gbit/s speed was achieved with a total of 16 different wavelength signals.[31]

  On December 31, 2006, NHK demonstrated a live relay of their annual Kōhaku Uta Gassen over IP from Tokyo to a 450 in (11.4 m) screen in Osaka. Using a codec developed by NHK, the video was compressed from 24 Gbit/s to 180–600 Mbit/s and the audio was compressed from 28 Mbit/s to 7–28 Mbit/s.[32] Uncompressed, a 20-minute broadcast would require roughly 4 TB of storage.

  The SMPTE first released Standard 2036 for UHDTV in 2007.[33] UHDTV was defined as having two levels, called UHDTV1 (3840 × 2160) and UHDTV2 (7680 × 4320).[33][34]

  In May 2007, the NHK did an indoor demonstration at the NHK Open House in which a UHDTV signal (7680 × 4320 at 60 fps) was compressed to a 250 Mbit/s MPEG2 stream.[35] The signal was input to a 300 MHz wide band modulator and broadcast using a 500 MHz QPSK modulation.[35] This "on the air" transmission had a very limited range (less than 2 meters), but shows the feasibility of a satellite transmission in the 36,000 km orbit.[35]

  In 2008, Aptina Imaging announced the introduction of a new CMOS image sensor specifically designed for the NHK UHDTV project.[36] During IBC 2008 Japan's NHK, Italy's RAI, BSkyB, Sony, Samsung, Panasonic Corporation, Sharp Corporation, and Toshiba (with various partners) demonstrated the first ever public live transmission of UHDTV, from London to the conference site in Amsterdam.[37][38]

  On September 29, 2010, the NHK partnered up and recorded The Charlatans live in the UK in the UHDTV format, before broadcasting over the internet to Japan...[39]"

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