Re: What is an HDMI and do I have it ?

Tuesday, October 11 2005, @ 3:51 PM (-0700 GMT)

Wow! Many thanks for the VERY nice dissertation on component vs. DVI
vs. HDMI. Much appreciated and understandable.

My "Cox Communications" STB connects to the component ports on my 37
in. LG LCD set. My TV also has a DVI connectorm but I do not know if
the "Cox Box" has one too? I will have to look. Am I correct in
assuming that IF my STB does have a DVI port, that I can connect a DVI
cable between the two? I assume the audio will still go over the
component cable as it has 9I think) 5 different connectors.

One question: May I ask what "artifacts" are? What do they "look"
like? How do I recognize them? What is bad about them?

Thank you,

JoAnne
WebMistress: http://www.AntiVirusYellowPages.com/



On 11 Oct 2005 07:33:08 -0700, "soupensu@xxxxxxxxxxxxx"
<soupensu@xxxxxxxxxxxxx> wrote:

>HDMI, DVI , Component Video Cables and Interconnects Explained
>
>Background:
>As the HDTV market continues to heat up, consumers are in need of being
>educated on the latest technology in order to make intelligent
>purchasing decisions. There are a plethora of articles explaining the
>technical pros and cons of the 3 dominant HDTV display technologies
>namely: LCD, Plasma, and DLP. However, one all- important, but
>overlooked feature in selecting a HDTV set is the type of HD video
>connection. The video connections available for HDTV are: component
>video, DVI (digital video interface) and HDMI (high definition
>multi-media interface). We will discuss briefly the pros and cons of
>each.
>
>
>Component video cable commonly referred to as R, G, B (Red, Green,
>Blue) actually consists of 3 separate cables because it distributes the
>3 primary color components to the display. All colors can be generated
>from weighted distribution of each Red, Green and Blue color
>components. Of the 3 HD connection technologies available today, analog
>component video is the most mature technology.
>
>-Advantage: Analog component video cable is mature and cost effective.
>
>-Disadvantage: component video cables are analog! All HDTV sets are
>inherently digital therefore extra digital to analog and analog to
>digital conversion is necessary in order to process the video. This
>extra conversion can introduce video artifacts. Since all HDTV's are
>digital, it only makes sense to use an all- digital connection such as
>DVI or HDMI.
>
>DVI (digital video interface) as the name suggests is an all-digital
>video connection. Unlike analog component cables the DVI interface
>transports the original digitized R,G, B video signals from the HD
>source to the HD display. Since it all digital, no artifacts or
>degradation will be incurred. You will get EXACTLY the picture that
>the video source supplies with no degradation. DVI connection is often
>found on HDTV as well as PC video cards.
>-Advantage: DVI is ALL-digital, so there is no picture degradation from
>source to display.
>
>-Disadvantage: Digitizing R, G, B requires extremely high bandwidth.
>The aggregate data rate of the digital R, G, B signals is 1.65 Gbps!
>The high bandwidth means that cable quality is important and also the
>link distance is limited. Typical link budget for a DVI is ~ 15 ft.
>
>HDMI (high definition multi-media interface) is the latest state of art
>audio and video connection. Technically, HDMI is identical to DVI with
>3 notable differences. 1) HDMI is a much smaller connector (it looks
>like an U.S.B. connector), 2) HDMI utilizes copy protection called HDCP
>(high definition copy protection) and 3) HDMI carries multi channel
>digital audio. HDMI, like DVI, is ALL-digital therefore picture
>quality is "perfect" from source to display.
>
>-Advantage: HDMI is a single digital video and Audio connection. Only
>1 single cable is needed to transport both audio and video! This
>significantly reduces cable clutter behind your theater setup. HDMI is
>all-digital therefore there is no picture degradation from source to
>display.
>
>-Disadvantage: Like DVI, the link distance is limited and a high
>quality cable is required because of the inherently high bandwidth
>required to transport digital R, G, B. video.
>
>
>You may view picture of a DVI and HDMI connections at :
>http://www.octavainc.com/faq.htm
>
>
>Conclusion:
>
>As the HDTV market continues to mature, consumers will need to be
>educated on the HDTV video connections available. We have outlined
>briefly the main features along with the pros and cons of each
>connection solution, so the consumer can make intelligent choices in
>selecting the HDTV video connections.
>
>
>
>JoAnne wrote:
>> Sunday, October 02 2005, @ 10:28 AM (-0700 GMT)
>>
>> Hi,
>>
>> I have a new LG 37 in. LCD HDTV Model DU-37LZ30. It has TWO HDTV
>> tuners that can be used with outdoor antennas for OTA HD reception. In
>> addition, it has TWO sets of "Component Inputs." Each of these sets
>> has 5 small funny looking "jacks". Cox, my cable company, connected
>> the HD output of my cable box to them. In addition it has an S-video
>> input, two sets of the old fashioned funny looking "jacks" that each
>> have 3 jacks. I guess this is the old time VCR input to the TV. Other
>> things mentioned in the manual and shown in a picture of the back of
>> the set are a rectangular "DVI Input (PC/DTV input)" with several
>> pins.
>>
>> I'm looking at an LG "HD-Upconverter DVD Player." Its an LDA-511
>> Model. the advertising says you can "watch DVDs in near HD quality."
>> Its also said to have a "7-in-2 media card reader for digital
>> cameras," whatever THAT is?
>>
>> Finally, it says: "TV HDMI input required for upconversion."
>>
>> What on earth is an "HDMI" ?? Is that "code" for one of the inputs I
>> already have on the back of my set? Maybe its the 2nd 5-jack component
>> input set I'm not using? <grin> I don't have the foggiest!
>>
>> Thank you gentlemen, :)
>>
>> JoAnne - WebMistress
>> http://www.AntiSpamYellowPages.com/

.

Relevant Pages

  • Re: Tilting LCD Panel for SLRS
    ... Is that not the same as DVI? ... I think that's what I've got on my LCD computer monitor and laptop for HD video though I've never used it and don't have the actual cables. ... Or HDMI ... The camera also has a video out plug and apparently there's a cable for that in the box that I misplaced; the drawing looks like a micro speaker plug on the camera and something you'd use on a VCR on the other end... ...
    (rec.photo.digital.slr-systems)
  • Re: Walmart says get best picture, after AVI, with component hookup
    ... What Cables will I need to Set Up My ... What cables do I need for video? ... Definition Multimedia Interface) HDMI is considered ... video connections, except DVI." ...
    (alt.tv.tech.hdtv)
  • Re: What is RGB input on HDTV for?
    ... HDMI is HDMI and nothing else. ... IIMU that component video has three lines: Y, Pr, & Pb where Pr is RED, Pb ... In the interim, use the S-Video connection. ...
    (alt.tv.tech.hdtv)
  • Re: Question on DVI / HDMI...
    ... HDMI & DVI are equal, as they both pass a pure digital signal, here is what ... > component video connections. ... > My Cox Communications STB, made by Motorola, has an HDMI connector ...
    (alt.tv.tech.hdtv)
  • Re: What is an HDMI and do I have it ?
    ... HDMI, DVI, Component Video Cables and Interconnects Explained ...
    (alt.tv.tech.hdtv)