EDH

n. r

The ETH Zürich, often called Swiss Federal Institute of Technology, is a science and technology university in the City of Zürich, Switzerland. The full name reads , with ETHZ also being a common unofficial abbreviation. Locals sometimes refer to it by the name Poly, derived from the original name Eidgenössisches Polytechnikum or Federal Polytechnic Institute. Like its sister institution École Polytechnique Fédérale de Lausanne, it is an integral part of the ETH Domain that is directly subordinate to the Federal Department of Home Affairs.
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In television technology, Error Detection and Handling (EDH) protocol is an optional but commonly used addition to the Standard Definition-Serial Digital Interface (SDI) standard. This protocol allows an SD-SDI receiver to verify that each field of video is received correctly.The SD-SDI transmitter calculates two CRC values for each video field--one corresponding to the active picture, and corresponding to the entire field (excluding the switching lines)--and places them in an EDH ancillary data packet. The EDH packet is inserted at a specific location in each field of video. The SD-SDI receiver also generates the same two CRC values for each field and compares them against the CRC values in the received EDH packet to determine if each field of video is received without errors. The EDH packet also contains bits to signal that a prior link in a broadcast or transmission chain contained an error; equipment which receives a video signal with an incorrect CRC, and retransmits the signal, is expected to re-insert the correct CRC (which may be different if the equipment alters the video signal in any way) and set the flag indicating a prior error. This feature makes it easier to determine which link, in a multi-link chain, was the source of the error.
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Eth (Ð, ð), also spelt edh or eð, is a letter used in Old English (Anglo-Saxon); present-day Icelandic; the Faroese alphabet, in which it is called edd; and the orthography for Scandinavian Älvdalsmål. It was also used in medieval Scandinavia, but was subsequently replaced with dh and later d. The capital eth resembles a Roman D with a line partially through the vertical stroke. The lowercase resembles a curved Roman d with a line through the top.
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(n.)
The name of an Anglo-Saxon letter. It is sounded as "English th in a similar word: other, doth."
  

Eng: edh
Urdu: اینگلوسیکسن حرف جس کی جلی شکلی ڈی ہے اور جو انگریزی کے ٹی ایچ کے مماثل ہے ۔