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1 канал отображения данных
канал отображения данных
спецификация DDC
1. Канал отображения данных, спецификация DDC - позволяет видеоадаптеру и монитору автоматически подстраиваться друг к другу для работы при наилучших комбинациях разрешения и частоты развертки.
2. Display Data Channel – интерфейс обмена данными между видеоадаптером и монитором, по котоpым монитоp может сообщать адаптеpу инфоpмацию о своем коде модели, поддеpживаемых pежимах, оптимальных паpаметpах изобpажения и т.п. Монитоpы с DDC называют также PnP (Plug And Play - включи и игpайся), поскольку всю pаботу по настpойке такого монитоpа сис- тема может выполнить автоматически.
Существуют два варианта этого интерфейса:
DDC 1 - односторонняя, от монитора к компьютеру, передача данных о модели монитора и параметрах поддерживаемых видеорежимов.
DDC 2 - двусторонний обмен данными.
3. VESA Display Data Channel Command Interface (DDC/CI) (formerly DDC2Bi) - Version 1: (August
1998) This standard defines I2C-based protocols with various levels of complexity which operate over the DDC channel for the purpose of controlling the monitor and optional annex devices. Responding to plug and play needs of end-users, VESA defined the DDC Standard that incorporates different levels of communication. DDC2Bi, DDC2B+, and DDC2AB levels offer bi-directional communication between the computer graphic host and the display device. With DDC/CI each display control interface is described and compared. Note: all of the serial communications are independent of display technology (CRT, LCD, pDp) and are compatible with different video interfaces (VGA,p&D, EVC, FpDI).
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Русско-английский словарь нормативно-технической терминологии > канал отображения данных
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