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GeezerVison is showing en.wikipedia.org — D-Terminal - Wikipedia This article is about the video connector. For the item used in Digimon Adventure 02, see Digivice.
D-Terminal (Japanese: D端子, Hepburn: D Tanshi; lit. D Connector) is a type of analogue video connector found only on consumer electronics sold in Japan. It was developed by the Electronic Industries Association of Japan (EIAJ) under standards EIAJ RC-5237 and JEITA CP-4120 for use in high-definition digital broadcasts.[1][2] The connector gets its name from the trapezoidal shape resembling a D, just like with the D-subminiature connector family. It does not come from the word "digital".[3] OverviewThe connector was standardised by the EIAJ under the RC-5237 specification in July 1999 as the "D Connector for Digital Broadcasting Component Video Signal(Y,Pb,Pr)connection".[1] It began to see widespread use in the Japanese domestic market during the 2000s for use with high-definition digital broadcast and video output signals.[4] However, despite this title, it only transmits analogue video signals.[3] Originally, YPBPR component video signals required three cables (with either RCA connectors for the consumer market or BNC connectors for the professional market). While this remained the standard in the rest of the world, in Japan, D-Terminal was created to be a single cable incorporating all these discrete signal lines. However, as with the previous component connection methods, D-Terminal does not carry audio and requires separate cables to transmit audio (often standard RCA cables). Since all YPBPR formats carry identical YPBPR component signals, a passive breakout cable can be used to connect a D-Terminal output to standard RCA or BNC connector inputs.[1] Additionally, the specification introduced identification signal lines that transmit the resolution (number of scan lines), scanning format (interlaced or progressive), and aspect ratio.[2] The connector also includes dedicated pins for plug insertion detection.[1] The connector's 14 pins, arranged in two rows of seven, are allocated as follows:
Since the three identification signal lines (lines 1–3) use shield ground, effectively there are 15 connection points.[1] Specifications and compatibilityResolution tiers The JEITA CP-4120 format specification divides D-Terminal capabilities into distinct tiers based on scan line count and scan type.[2] Higher-numbered tiers are backward-compatible with all lower-numbered tiers.[3] However, a source device is only required to output the highest tier specified. For example, if a D4 device is connected to a display that only supports D1, it will output no signal unless it explicitly supports lower-numbered tiers.[2]
The D3 tier serves the primary design goal of the connector, as 1080i was established as the standard format for high-definition digital broadcasts.[5] This format was adopted in Japan as well, with the ARIB STD-B21 receiver specification explicitly recommending D-Terminal connections for digital broadcast reception.[6] PinsFemale D-Terminal connector diagram
Video game console compatibilitySeveral video game consoles released in Japan, including American Xbox consoles, support D-Terminal cables.
Transition to HDMI and declineWhile D-Terminal was widely used during early HD adoption, the lack of encryption on these signals due to their analogue nature led to content distributors and hardware manufacturers placing increasing restrictions on analogue HD output. This ultimately drove the widespread adoption of High-Definition Multimedia Interface (HDMI) by both the industry and consumers.[22][23][24][25][26] DVD players equipped with upscaling capabilities were restricted to a maximum of D2 (480p) output over component video, due to the terms of the Content Scramble System (CSS) and Content Protection for Recordable Media (CPRM) licences.[22] Additionally, HDMI came to support High-bandwidth Digital Content Protection (HDCP)[27] and this was required for HD video disc (HD DVD and Blu-ray) playback,[23] restricting the analogue output of those formats. Starting 1 January 2011, the Advanced Access Content System (AACS) licensing agreement mandated that all new HD video disc players restrict their analogue HD output to D1 (480i). Manufacturing of new Blu-ray players with analogue output ultimately ceased on 31 December 2013.[24][25] Driven by these restrictions, Japanese consumer electronics manufacturers ultimately phased out analogue outputs and inputs as a whole.[24][25][26] See alsoReferences
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