hdmi英文演示ppt課件(編輯修改稿)
2025-01-04 02:45 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 DTV municates video processing delay via HDMI 2. Signal delivered to AVR 3. AVR delays audio to speakers to allow for video processing 4. Video and audio presented in sync HDTV 11 Thinner, shorter, narrower Compatible with existing Type A connector Plug is slightly smaller but Chassis receptacle is much smaller Requested by Camcorder and Digital Still Camera makers Regular and Mini Connectors TypeC MiniConnector 5 meters 10 meters Cable Equalization – Theory 2) Receivers can pensate for that filter by applying an equal but opposite filter 1) Cables are just a big filter 2 meters 3) Different lengths change slope of attenuation – receiver can target particular cable length 14 15 Reference Cable Equalizer HDMI measures Cat2 cable output after applying an ideal “Reference Cable Equalizer” This assumes that receivers will support such cable, so… HDMI measures receiver performance against this same spec 16 Greater Bandwidth – How? Source Termination Serial transmission line basics ? Changes in impedance are bad ? Cause reflections back to the source of the signal ? Connectors frequently have impedance mismatches and cause some reflection ? Highimpedance source will then bounce that reflection back down the line bad signal quality 17 Potential Problem HDMI Cable Signal transmitted from driver… Partial reflection back from connector… Highimpedance source causes additional reflection… 18 Source Termination HDMI Cable Partial reflection back from connector… Signal transmitted from driver… Terminated source swallows reflection… 19 Source Termination – Typical Cable Without source termination With source termination 20 Source Termination – WorstCase Cable Cable with highimpedance circuitry at input end
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