Löng HDMI snúra. Skert gæði?
Sent: Mið 12. Jan 2011 00:30
Er eitthvað verra að hafa extra langa HDMI snúru? 
HDMI 1.3 defines two categories of cables: Category 1 (standard or HDTV) and Category 2 (high-speed or greater than HDTV) to reduce the confusion about which cables support which video formats. Using 28 AWG conductors, a cable of about 5 meters (about 16 feet) can be manufactured easily and inexpensively to Category 1 specs. Higher-quality construction (24 AWG, tighter construction tolerances, and so on) can reach lengths of 12 to 15 meters, which would give you your 30 feet
Q. What is the difference between a “Standard” HDMI cable and a “High-Speed” HDMI cable?
Recently, HDMI Licensing, LLC announced that cables would be tested as Standard or High-Speed cables.
* Standard (or “category 1”) HDMI cables have been tested to perform at speeds of 75Mhz or up to 2.25Gbps, which is the equivalent of a 720p/1080i signal.
* High Speed (or “category 2”) HDMI cables have been tested to perform at speeds of 340Mhz or up to 10.2Gbps, which is the highest bandwidth currently available over an HDMI cable and can successfully handle 1080p signals including those at increased color depths and/or increased refresh rates from the Source. High-Speed cables are also able to accommodate higher resolution displays, such as WQXGA cinema monitors (resolution of 2560 x 1600).
Q. Does HDMI accommodate long cable lengths?
Yes. HDMI technology has been designed to use standard copper cable construction at long lengths. In order to allow cable manufacturers to improve their products through the use of new technologies, HDMI specifies the required performance of a cable but does not specify a maximum cable length. We have seen cables pass "Standard Cable" HDMI compliance testing at lengths of up to a maximum of 10 meters without the use of a repeater. It is not only the cable that factors into how long a cable can successfully carry an HDMI signal, the receiver chip inside the TV or projector also plays a major factor. Receiver chips that include a feature called "cable equalization" are able to compensate for weaker signals thereby extending the potential length of any cable that is used with that device.
With any long run of an HDMI cable, quality manufactured cables can play a significant role in successfully running HDMI over such longer distances.
benzmann skrifaði:þær bestu eru með Gull vírum, ættir að vera góður ef þú kemst yfir þannig snúru.
AntiTrust skrifaði:benzmann skrifaði:þær bestu eru með Gull vírum, ættir að vera góður ef þú kemst yfir þannig snúru.
Njah, þetta gildir eiginlega aldrei um HDMI snúrur. Þetta er bara digital merki sem er að fara á milli, annaðhvort virkar það eða ekki.
appel skrifaði:Allt er þetta analog á vírnum, það er bara túlkað sem stafræn gögn á endanum.
AntiTrust skrifaði:appel skrifaði:Allt er þetta analog á vírnum, það er bara túlkað sem stafræn gögn á endanum.
Neeei, ertu ekki að rugla e-ð?
HDMI er óþjappað stafrænt merki frá byrjun til enda, það er ekkert digital-to-analog converion þarna á milli.
.. Ef ég man rétt?
A digital system[1] is a data technology that uses discrete (discontinuous) values