Rudimental
Expert Member
- Joined
- Jan 6, 2009
- Messages
- 1,457
- Reaction score
- 2
Sound card with optical/digital coax = very cheap
Amp with HDMI = ludicrously expensive
-
Join the MyBroadband community
South Africa’s biggest forum. Discuss, discover, and connect with thousands of members.
-
Question of the Day: How do you normally pay for purchases in stores?
Monitor HDMI Connection: What's the Use/Point?
- Thread starter Network1
- Start date
Sound card with optical/digital coax = very cheap
Amp with HDMI = ludicrously expensive
KhoisanX
Expert Member
Some do, the Samsung T240/T260 foe xample.
Below a cut and paste from http://www.buzzle.com/articles/dvi-vs-hdmi-difference-between-dvi-and-hdmi.html
DVI is the abbreviation of Digital Visual Interface, while HDMI stands for High Definition Multimedia Interface. DVI and HDMI are more similar than different. There are a very few differences between them. DVI is an interface, which is used for providing high quality image. In DVI, the pixels are transmitted as binary data, and the brightness is set accordingly. Since the quality provided by HDMI is good, many people opt HDMI over S Video, SCART, D Terminal and many more. The signals for HDMI and DVI are compatible with each other, hence no signal conversion is required when using a DVI adapter for HDMI, and vice versa; also there is no loss of data when a DVI adapter is used for HDMI or vice versa. HDMI is said to be a successor of DVI, hence HDMI is better than DVI in many aspects, like the transfer rate of HDMI is more than DVI. Both DVI and HDMI transfer signals, use separate red, green and blue components and the components are transferred through different data channels. HDMI is derived from the protocol used by DVI, hence the working and encoding scheme for both the technologies are same.
The difference between DVI and HDMI are as follows:
Digital Visual Interface (DVI)
DVI was developed by Digital Display Working Group (DDWG).
It transmits digital video signals. Depending on the version, it transmits video signals in digital or analog format.
The equipments where DVI is widely used are flat panel LCD computer and digital projectors.
There are three versions of DVI; DVI-A, DVI-D and DVI-I. DVI-A transmits video in an analog format. DVI-D transmits video in digital format. DVI-I or integrated mode can transmit video signals in both analog and digital formats.
DVI is like a computer connection with a large connector and a series of pins at one end.
No provisions are made for the security of the content.
As compared to HDMI, DVI is more affected by noise.
High Definition Multimedia Interface (HDMI)
HDMI was invented by Hitachi, Philips, Sony, Toshiba, Thomson, Panasonic and Quasar.
It transmits audio as well as video signals in digital format.
HDMI is used in set top boxes, personal computers, video games, blue ray disc players and digital TVs.
The versions of HDMI are; HDMI 1.0, HDMI 1.1, HDMI 1.2 and HDMI 1.3. HDMI 1.0 does not transmit DVD audio, but HDMI 1.1 supports the transmission of DVD audio. HDMI 1.2 acts as an interface to computers. HDMI 1.3 backs color support. It is the only cable provided with PS3. Hence HDMI 1.3 requires larger bandwidth.
HDMI cable is like a USB cable, that slides into the slot of the source device.
Provisions are made for the security of the content. A digital copy called HDCP is used for providing security.
HDMI reduces the amount of noise.
Both HDMI and DVI provide good quality output, and hence they are preferred over other cords. But the quality of output provided by HDMI is better than DVI; also HDMI has many advantages over DVI. HDMI has captured almost 100% of the market.
DVI is the abbreviation of Digital Visual Interface, while HDMI stands for High Definition Multimedia Interface. DVI and HDMI are more similar than different. There are a very few differences between them. DVI is an interface, which is used for providing high quality image. In DVI, the pixels are transmitted as binary data, and the brightness is set accordingly. Since the quality provided by HDMI is good, many people opt HDMI over S Video, SCART, D Terminal and many more. The signals for HDMI and DVI are compatible with each other, hence no signal conversion is required when using a DVI adapter for HDMI, and vice versa; also there is no loss of data when a DVI adapter is used for HDMI or vice versa. HDMI is said to be a successor of DVI, hence HDMI is better than DVI in many aspects, like the transfer rate of HDMI is more than DVI. Both DVI and HDMI transfer signals, use separate red, green and blue components and the components are transferred through different data channels. HDMI is derived from the protocol used by DVI, hence the working and encoding scheme for both the technologies are same.
The difference between DVI and HDMI are as follows:
Digital Visual Interface (DVI)
DVI was developed by Digital Display Working Group (DDWG).
It transmits digital video signals. Depending on the version, it transmits video signals in digital or analog format.
The equipments where DVI is widely used are flat panel LCD computer and digital projectors.
There are three versions of DVI; DVI-A, DVI-D and DVI-I. DVI-A transmits video in an analog format. DVI-D transmits video in digital format. DVI-I or integrated mode can transmit video signals in both analog and digital formats.
DVI is like a computer connection with a large connector and a series of pins at one end.
No provisions are made for the security of the content.
As compared to HDMI, DVI is more affected by noise.
High Definition Multimedia Interface (HDMI)
HDMI was invented by Hitachi, Philips, Sony, Toshiba, Thomson, Panasonic and Quasar.
It transmits audio as well as video signals in digital format.
HDMI is used in set top boxes, personal computers, video games, blue ray disc players and digital TVs.
The versions of HDMI are; HDMI 1.0, HDMI 1.1, HDMI 1.2 and HDMI 1.3. HDMI 1.0 does not transmit DVD audio, but HDMI 1.1 supports the transmission of DVD audio. HDMI 1.2 acts as an interface to computers. HDMI 1.3 backs color support. It is the only cable provided with PS3. Hence HDMI 1.3 requires larger bandwidth.
HDMI cable is like a USB cable, that slides into the slot of the source device.
Provisions are made for the security of the content. A digital copy called HDCP is used for providing security.
HDMI reduces the amount of noise.
Both HDMI and DVI provide good quality output, and hence they are preferred over other cords. But the quality of output provided by HDMI is better than DVI; also HDMI has many advantages over DVI. HDMI has captured almost 100% of the market.
Ono'rach
Executive Member
Interesting article, but they don't really substantiate any of their facts. I would like to know how DVI is affected by noise more than HDMI? In fact, how can a digital (binary) signal be affected by noise at all? As far as I know it is impossible to improve the "quality" of a digital signal, as it is binary data which will either be transmitted successfully or not all.
That is the reason why there is no point in buying super-expensive HDMI cables, as the cheap ones do just as good a job.
Please can someone more knowledgeable than I comment
That is the reason why there is no point in buying super-expensive HDMI cables, as the cheap ones do just as good a job.
Please can someone more knowledgeable than I comment
Interesting article, but they don't really substantiate any of their facts. I would like to know how DVI is affected by noise more than HDMI? In fact, how can a digital (binary) signal be affected by noise at all? As far as I know it is impossible to improve the "quality" of a digital signal, as it is binary data which will either be transmitted successfully or not all.
That is the reason why there is no point in buying super-expensive HDMI cables, as the cheap ones do just as good a job.
Please can someone more knowledgeable than I comment
I have read that exact same argument, ie either the ones and zeros come out or they don't. So the wheres and hows wrt the noise - I don't know.
Interesting article, but they don't really substantiate any of their facts. I would like to know how DVI is affected by noise more than HDMI? In fact, how can a digital (binary) signal be affected by noise at all? As far as I know it is impossible to improve the "quality" of a digital signal, as it is binary data which will either be transmitted successfully or not all.
That is the reason why there is no point in buying super-expensive HDMI cables, as the cheap ones do just as good a job.
Please can someone more knowledgeable than I comment
HDMI cables DO have noise, that's why you need a thicker cable to run distances longer than 3m.
The longer the cable is, the more noise the cable will have. The sender (PS3) and receiver (TV) both have error correction mechanisms that remove noise, but they can only remove noise to a certain extent. It's possible to have an ultra long HDMI cable, but you'll need to place signal extenders at regular intervals to remove noise and errors. The cable noise restricts the amount of data that can be sent through the cable, so even if a noisy cable can't support 1080p, it can probably support 720p, 480p and lower resolutions. I assume this is done by taking erroneous bits of data that represent a certain number of pixels, then "averaging" the data so that they represent fewer pixels that don't have errors. So a signal making up 1920x1080 pixels could be riddled with errors, but those pixels may be averaged/combined into 1280x720 pixels that are error free. I could be horribly wrong, but that's what I think.
xera
Expert Member
my word... :wtf: so you're saying, if my pixels suddenly start getting extremely blurry, it's because there is lots of noise in my HDMI cable?
No, I think the sender and receiver determine at the beginning how much data the hdmi cable is capable of transmitting. You won't have the resolution changing at random times, only at the beginning, before the main signal starts transmitting. It think it's done during the handshake stage.
But really, you shouldn't take me seriously. I'm pretty much using my imagination to make sense of it.
Rocket-Boy
Honorary Master
It all depends on whether the pins in the DVI connection are connected to the output head on the card. The ATI 4890 does what you mention above, but you normally need an HDMI adapter to convert the signals on the receiving side for audio.
Pada
Executive Member
If you want to read up on HDMI error correction, then have a look at the following post:
http://arstechnica.com/civis/viewtopic.php?p=6271817#p6271817
http://arstechnica.com/civis/viewtopic.php?p=6271817#p6271817
Excellent article. As it turns out, the HDMI standard employs various forms of error correcting, to correct errors that form as the video signal travels along the cable. The error correcting takes place in the receiver. If there are too many errors in the transmission for all to be corrected, then those errors would manifest on the television screen in what is known as "sparkles".
So if a long cable gives sparkles when transmitting 1080p video, it should work fine when transmitting 720p video. Be weary of short cables (less than 3m) that give sparkles though, since there's most likely a defect in the cable that's producing too many errors, and moving the faulty cable could worsen defect to the point that the cable stops working.