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- Error_Detection_and_Handling abstract "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.The EDH protocol does not provide for error correction, only error detection. Also, there is no mechanism in SD-SDI to allow a field containing errors to be retransmitted. EDH is used primarily to assist in identifying faulty equipment in a video chain so that it can be quickly replaced or repaired. EDH is not used with high definition video, as the HD serial digital interface includes a mandatory embedded CRC for each line.The SD-SDI EDH protocol is defined by SMPTE RP 165-1994 and the equivalent ITU standard ITU-R BT.1304".
- Error_Detection_and_Handling wikiPageExternalLink TektonixDTSystems&Meas.pdf.
- Error_Detection_and_Handling wikiPageExternalLink october.pdf.
- Error_Detection_and_Handling wikiPageExternalLink www.smpte.org.
- Error_Detection_and_Handling wikiPageID "4251940".
- Error_Detection_and_Handling wikiPageLength "2491".
- Error_Detection_and_Handling wikiPageOutDegree "11".
- Error_Detection_and_Handling wikiPageRevisionID "546817706".
- Error_Detection_and_Handling wikiPageWikiLink Ancillary_data.
- Error_Detection_and_Handling wikiPageWikiLink Category:Digital_television.
- Error_Detection_and_Handling wikiPageWikiLink Category:ITU-R_recommendations.
- Error_Detection_and_Handling wikiPageWikiLink Category:Serial_digital_interface.
- Error_Detection_and_Handling wikiPageWikiLink Cyclic_redundancy_check.
- Error_Detection_and_Handling wikiPageWikiLink Error_detection_and_correction.
- Error_Detection_and_Handling wikiPageWikiLink High-definition_television.
- Error_Detection_and_Handling wikiPageWikiLink International_Telecommunication_Union.
- Error_Detection_and_Handling wikiPageWikiLink Serial_digital_interface.
- Error_Detection_and_Handling wikiPageWikiLink Society_of_Motion_Picture_and_Television_Engineers.
- Error_Detection_and_Handling wikiPageWikiLink Television.
- Error_Detection_and_Handling wikiPageWikiLinkText "Error Detection and Handling".
- Error_Detection_and_Handling subject Category:Digital_television.
- Error_Detection_and_Handling subject Category:ITU-R_recommendations.
- Error_Detection_and_Handling subject Category:Serial_digital_interface.
- Error_Detection_and_Handling type Redirect.
- Error_Detection_and_Handling comment "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.".
- Error_Detection_and_Handling label "Error Detection and Handling".
- Error_Detection_and_Handling sameAs Q3732570.
- Error_Detection_and_Handling sameAs Error_Detection_and_Handling.
- Error_Detection_and_Handling sameAs m.0bsfy7.
- Error_Detection_and_Handling sameAs Q3732570.
- Error_Detection_and_Handling wasDerivedFrom Error_Detection_and_Handling?oldid=546817706.
- Error_Detection_and_Handling isPrimaryTopicOf Error_Detection_and_Handling.