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 HDMI Cable Quality?, Really make a diffrent?

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moomoos
post Nov 5 2009, 10:27 AM

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QUOTE(ar188 @ Nov 5 2009, 10:16 AM)
both coaxial and optica cable are known accepted types of audio digital interconnects....  biggrin.gif
*
yes i know

i just want to divert the attention to Hifi cos ...
if Digital 0/1 can have audio difference between different brands....
then what about Digital 0/1 in Video quality???
ar188
post Nov 5 2009, 10:31 AM

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QUOTE(moomoos @ Nov 5 2009, 10:27 AM)
yes i know

i just want to divert the attention to Hifi cos ...
if Digital 0/1 can have audio difference between different brands....
then what about Digital 0/1 in Video quality???
*
then that;'s even more simple, just use a good digital camera and snap a shot each for A/B testing..
just like how they compare projector picture quality for video noise and artifacts etc.. then no need to argue anymore..
moomoos
post Nov 5 2009, 10:49 AM

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QUOTE(ar188 @ Nov 5 2009, 10:26 AM)
get it from reputable dealer lor... so detailed eye to notice the minute difference in HDMI quality between cable but cannot notice imitation products meh?
*
can differentiate.....edited but imitation very difficult to tell la

until now i didnt say an expensive HDMI betters a cheapo HDMI ... correct!!!

i just stress/debate that... there is a difference!!

what i mean is if you pay few hundreds for a "pressumed original" not knowing its an imitation (you get a heartfelt erie feeling being conned, y take risk for monster)

at the end of the day, not necessary an expensive HDMI will better a Cheapo HDMI, and neither did i say a cheapo HDMI will better an expensive one

it all boils up to system compatibility

my point here is just to debate there is actually a difference in HDMI cables.. rclxms.gif
phew !!!! sweat.gif sweat.gif sweat.gif sweat.gif one against a million tongue.gif

gracias


Added on November 5, 2009, 10:58 amaudible signals are much easier to differenciate

when you hear a thunder, you can roughly tell how loud it is, but when you see the lightning flashes, you couldnt tell it brighter, fatter or thinner

you just notice the flash ... correct???
but there is a difference

This post has been edited by moomoos: Nov 5 2009, 11:35 AM
low98944
post Nov 5 2009, 11:18 AM

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QUOTE(arremie @ Nov 4 2009, 10:14 PM)
I wonder if people who said different cables doesn't make a difference actually did try or they just simply pickup what others have said or written rolleyes.gif
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wave.gif me, me, always copied and paste. rolleyes.gif laugh.gif
ar188
post Nov 5 2009, 12:32 PM

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QUOTE(low98944 @ Nov 5 2009, 11:18 AM)
wave.gif me, me, always copied and paste.  rolleyes.gif  laugh.gif
*
wah.. char own self? biggrin.gif
low98944
post Nov 5 2009, 01:22 PM

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QUOTE(ar188 @ Nov 5 2009, 12:32 PM)
wah.. char own self?  biggrin.gif
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ph34r.gif hands.gif
ar188
post Nov 5 2009, 01:26 PM

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QUOTE(low98944 @ Nov 5 2009, 01:22 PM)
ph34r.gif  hands.gif
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any USD9.99 good deal blu-rays today? biggrin.gif
low98944
post Nov 5 2009, 01:35 PM

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QUOTE(ar188 @ Nov 5 2009, 01:26 PM)
any USD9.99 good deal blu-rays today?  biggrin.gif
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Deleted.

This post has been edited by low98944: Nov 5 2009, 01:44 PM
ar188
post Nov 5 2009, 01:42 PM

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better transfer to V4 thread later kena tembak for OT.. (apart from copy and paste malpractices) tongue.gif
arremie
post Nov 5 2009, 02:20 PM

hmm...
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QUOTE(low98944 @ Nov 5 2009, 01:35 PM)
Deleted.
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nice meh movie "Deleted" tongue.gif
fun_feng
post Nov 5 2009, 02:29 PM

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QUOTE(moomoos @ Nov 5 2009, 09:00 AM)
this topic.... very nice debating indeed....

my fren, a sony technician and me did confirm there is a change,

one HDMI seem to display clearer PQ than the other, and also for AQ the ambience is different

As for me i believe there is a difference,
but at the end of the day... The Decision is Yours biggrin.gif
*
Ok let me see if i can convince you.

Do you know how binary (0, 1) system works?

A LCD tv is made of millions of pixels (or dots). 1920x1080(2 million pixels) for a FullHD tv
Each pixel is encoded by binaries. If you see your GC properties, there is an option to choose 32-bit color or 16-bit color, this is what represents a pixel.
32 bit means 32 (0 or 1) to represent the color that a pixel can display.

So take an example that you are displaying a fat straight line with some blur around the edges (which means grey pixels around it)
These grey pixels can never becomes black pixels which will make the line looked clearer. WHY?? Because the cable can never know what encoding to make it display a black pixel. It doesn't have a chip/DSP for such algorithm.

Similarly, if the picture is a well defined straight line with no grey pixels around it, a capalang cable can never make the pixels grey in color. At most (if the build quality is lousy), the encoding for that particular pixel got lost during the transmission and the TV will just display a weird color for pixel (white i think).

Similarly is for audio. Do you know how analog signal is encoded into digital form?
Dark NT
post Nov 5 2009, 02:35 PM

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QUOTE(fun_feng @ Nov 5 2009, 02:29 PM)
Ok let me see if i can convince you.

Do you know how binary (0, 1) system works?

A LCD tv is made of millions of pixels (or dots). 1920x1080(2 million pixels) for a FullHD tv
Each pixel is encoded by binaries. If you see your GC properties, there is an option to choose 32-bit color or 16-bit color, this is what represents a pixel.
32 bit means 32 (0 or 1) to represent the color that a pixel can display.

So take an example that you are displaying a fat straight line with some blur around the edges (which means grey pixels around it)
These grey pixels can never becomes black pixels which will make the line looked clearer. WHY?? Because the cable can never know what encoding to make it display a black pixel. It doesn't have a chip/DSP for such algorithm.

Similarly, if the picture is a well defined straight line with no grey pixels around it, a capalang cable can never make the pixels grey in color. At most (if the build quality is lousy), the encoding for that particular pixel got lost during the transmission and the TV will just display a weird color for pixel (white i think).

Similarly is for audio. Do you know how analog signal is encoded into digital form?
*
I am even more confused after hearing your opinion rclxub.gif


ar188
post Nov 5 2009, 02:43 PM

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QUOTE(arremie @ Nov 5 2009, 02:20 PM)
nice meh movie "Deleted"  tongue.gif
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yawn.gif


laugh.gif
fun_feng
post Nov 5 2009, 02:50 PM

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QUOTE(Dark NT @ Nov 5 2009, 02:35 PM)
I am even more confused after hearing your opinion  rclxub.gif
*
Try to understand how pixel works http://en.wikipedia.org/wiki/Pixel

Understand how pixel is represented by 0,1(binary). THen u will know why a cable cannot affect the colors it is showing.

Only the TV/GC/etc... can make the picture "better" using Digital Signal Processor (DSP)/software/etc.... A chipless HDMI cable can do nothing


By "better", i mean the picture is not original but is "modded" to be more comfortable for human eyes
Johannbeckham
post Nov 5 2009, 02:54 PM

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HI! i just bought my CPU yesterday and my graphic card has HDMI port and Display port (also optical connection for audio). I also have DELL 2408WFP at home with DisplayPort Cable already include. I also have 2.1 Speaker with optical Audio connection (but does not have HDMI I think). Now my question is, do i still need to buy HDMI cable for a more clearer FULL HD quality video, or is DisplayPort cable enough already? Is there alot difference if I also buy the optical cable for my sound?
anfieldude
post Nov 5 2009, 03:08 PM

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QUOTE(Johannbeckham @ Nov 5 2009, 02:54 PM)
HI! i just bought my CPU yesterday and my graphic card has HDMI port and Display port (also optical connection for audio). I also have DELL 2408WFP at home with DisplayPort Cable already include. I also have 2.1 Speaker with optical Audio connection (but does not have HDMI I think). Now my question is, do i still need to buy HDMI cable for a more clearer FULL HD quality video, or is DisplayPort cable enough already? Is there alot difference if I also buy the optical cable for my sound?
*
Suffice to say, Display Port shd be enuf.
moomoos
post Nov 5 2009, 03:13 PM

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QUOTE(fun_feng @ Nov 5 2009, 02:29 PM)
Ok let me see if i can convince you.

Do you know how binary (0, 1) system works?

A LCD tv is made of millions of pixels (or dots). 1920x1080(2 million pixels) for a FullHD tv
Each pixel is encoded by binaries. If you see your GC properties, there is an option to choose 32-bit color or 16-bit color, this is what represents a pixel.
32 bit means 32 (0 or 1) to represent the color that a pixel can display.

So take an example that you are displaying a fat straight line with some blur around the edges (which means grey pixels around it)
These grey pixels can never becomes black pixels which will make the line looked clearer. WHY?? Because the cable can never know what encoding to make it display a black pixel. It doesn't have a chip/DSP for such algorithm.

Similarly, if the picture is a well defined straight line with no grey pixels around it, a capalang cable can never make the pixels grey in color. At most (if the build quality is lousy), the encoding for that particular pixel got lost during the transmission and the TV will just display a weird color for pixel (white i think).

Similarly is for audio. Do you know how analog signal is encoded into digital form?
*
lets say a HD 1080p of 1920×1080 native resolution

means to say i would have 2,073,600 pixels correct !!

so it will have est 2.7million dots of either a binary 1 or a binary 0

like ppl say digital is either a 1 or 0, means you get or dont get correct

so if a LCD depends on only one digital signal of 0 or 1 to turn "ON" or "OFF" i truly understand

but now so many million pixels meaning to form a picture,

so its common maybe few thousands pixels cant decide whether is a 0 or 1, so it just passes out what it think it is or dont pass out at all,,
meaning you still get a few thousands of "unstable correct" 0 or 1 signals...

during this state of malfunction unstableness, what will happen??? you still get a picture right, but not getting the FULL picture.

Am i correct to say???


Added on November 5, 2009, 3:19 pmCables do have resistance,
maybe its the resistance that decide to let the 0 or 1 to pass thru or not or just left it idle..



Added on November 5, 2009, 3:28 pmDecision time

10101010101010110101010010110010101010100100100101010011010101010101001010101010101001010100101101001010 eg 1

10101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010 eg 2

looks identical correct, if yoo really count the pixel you compare you can see correct eg 2 is original signal and eg1 is the receiving signal

so what if the HDMI cable cant decide and just alters the signal... ?

cant imagine if you have 2.7million pixels

gracias

This post has been edited by moomoos: Nov 5 2009, 03:31 PM
Johannbeckham
post Nov 5 2009, 03:33 PM

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QUOTE(anfieldude @ Nov 5 2009, 03:08 PM)
Suffice to say, Display Port shd be enuf.
*
so you mean there is no difference if I use DisplayPort Cable compare to HDMI cable for my current set-up? Is there no advantage of HDMI cable over DisplayPort cable if I have the same port on my CPU?
ar188
post Nov 5 2009, 03:37 PM

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QUOTE(moomoos @ Nov 5 2009, 03:13 PM)


so what if the HDMI cable cant decide and just alters the signal... ?
yes there will be data loss....

so you need to explain how this digital data loss due to HDMI, translate to analog video (what you see on the screen) being less "nice"..


fun_feng
post Nov 5 2009, 03:40 PM

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QUOTE(moomoos @ Nov 5 2009, 03:13 PM)
lets say a HD 1080p of 1920×1080 native resolution

means to say i would have 2,073,600 pixels correct  !!

so it will have est 2.7million dots of either a binary 1 or a binary 0

like ppl say digital is either a 1 or 0, means you get or dont get correct

so if a LCD depends on only one digital signal of 0 or 1 to turn "ON" or "OFF" i truly understand

but now so many million pixels meaning to form a picture,

so its common maybe few thousands pixels cant decide whether is a 0 or 1, so it just passes out what it think it is or dont pass out at all,,
meaning you still get a few thousands of "unstable correct" 0 or 1 signals...

during this state of malfunction unstableness, what will happen??? you still get a picture right, but not getting the FULL picture.

Am i correct to say???
*
Firstly each pixel has 32 bits (0,1), so a FULL HD 1080p is 2 million x 32 bits = 64mil bits.
Assume a 60Hz refresh rate which means 60x64 mil bits = 3.84Gbps + additional bits for CRC, audio and god knows what... is well within the range of HDMI 1.3 (10.2 Gbps)

YOu must understand 0 or 1 is not ON or OFF this simple in this case. These 32 bits represent a coding that the TV understand so that it will project a color to the pixel.

Then you must also understand something call CRC (Cyclic Redundancy Check). These bits transmit throught the cable in "packets". Any corrupted bits in the packets gets detected by the CRC algorithm which the TV calculates. Now the TV know that the packet for this particular pixel is spoilt, the TV will most probably display a default color for it, white if i am not wrong.

You are correct you will still get a picture, but not getting the FULL picture. But if a few thousands pixels are corrupted, most probably your picture will have white patches on it. You will not get clearer picture, red is redder, sky is bluer etcc....


Anyway, the probabllity of getting corrupted bits is probably 0.0001%.



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