What is right reference for resolution D1 / HD1 / CIF ....

[spe99 0]

Hi !

 

I'm new here.

 

I search over the Net about resolution.

Now I understand nothing more about D1 / HD1 / CIF..... A big mixing in my head

 

Some website or DVR Specification say for PAL, resolution is:

 

for D1 720 x 576 pixels, while another say 4CIF = D1 = 704 x 576 pixels !!!

 

for HD1 = 2CIF = 704 x 288 pixels, while another say HD1: 352 x 576 pixels !!!

 

 

What is right reference ????

 

 

- D1 : 720 x 576 pixels

- 4CIF / D1 : 704 x 576 pixels

- 2CIF / HD1 : 704 x 288 pixels

- HD1: 352 x 576 (HD1 = Half D1)

- DCIF : 528 x 384 pixels

- CIF : 352 x 288 pixels

- QCIF : 176 x 144 pixels

 

 

Is 4CIF = D1 ???

Is 2CIF = HD1 ???

 

Now what is wrong ??

 

Thanks for comments !

 

Best regards.

S

[Birdman Adam 0]

To make it even more confusing, the standards are different for NTSC and PAL systems...

[spe99 0]

Hi.

Thanks for comment.

 

Yes, also NTSC... and NTSC values are welcome too !

 

Thanks.

Best regards,

Seb

[survtech 0]

The way I learned it is:

 

Format_____Video Resolution

CIF/SIF(525)___352 x 240

CIF/SIF(625)___352 × 288

4CIF/4SIF(525)_704 x 480

4CIF/4SIF(625)_704 × 576

D1(525)_______720 x 480

D1(625)_______720 x 576

 

* Sometimes 4SIF/4CIF is specified the same as VGA, which is 640 x 480 / 640 x 576.

* There is also 1/2 frame or 2CIF, which is based on removing the odd or even fields and is usually specified as either 640 x 240 or thereabouts.

[Birdman Adam 0]

That is a good list I think!

 

I have typically heard the 2CIF you are talking about being referred to as HD1 (half D1). Also, it seems 4CIF and D1 are so similar that it they are often used somewhat interchangeably.

 

My rule is to always record at max resolution - either 4CIF of D1 depending on your DVR. When choosing a DVR, make sure it can hit your target FPS at the max resolution.

[spe99 0]

Hi !!

 

Thanks for nice comments.

 

So - 2CIF = HD1 (= 4CIF/2 or D1/2) and it's egal to 704 x 288 pixels or 352 x 576 pixels can also be true ??

 

 

Now I need a find good DVR at affordable price... to many possibility... Hard choice..

 

My first Raysharp D9216 was a wrong choice for first experience...

 

Best regards,

Seb

[shockwave199 0]

Aside from the obvious- getting D1 on all channels for the best shot at a good recording, I think it comes down to options as well. I'm still running my first dvr I put in line earlier this year, chosen with little understanding of specs. But as luck would have it, it's actually doing well and offers me options per channel. I only have D1 on the first two channels, which I knew going in. But that's enough for me. But per channel, I also have the option of HD1 and CIF. Per channel, I also have the option of frame rates from 1-30 fps, and bit rate options of low/med/high. So although I certainly don't have a high end dvr, the options give me the flexibility to balance out what I need per channel and I think that's a good thing too. Are these options typical to all dvrs, especially in the budget range? I don't know. So I suppose if you're getting a budget dvr, at least confirm that it's flexible in this area. And it's a good idea to DL the pdf manuals and see the real deal about what they can and can't do. Sometimes it's easier to figure out what the dvr can really do from the manual, as opposed to the spec page.

 

Dan

[rory 0]

SQCIF = 128x96

QCIF = 176x144

QVGA = 320x240

CIF = 352x240/288

HVGA = 640x240

VGA = 640x480

2 CIF = 704x240/288

4 CIF = 704x480/576

D1 CROPPED = 704x480/576

D1 = 720x480/576

[spe99 0]

Thanks for nice comments Dan, It's right, per channel flexibility is an important specification.

 

And thanks Rory for the new table with all resolution values.

 

Is it somewhere a site where we can enter desired characteristics and who it sorts out DVR results with some name and models ?

[ISU4US 0]

Please lend me a hand, What dos it mean 525 & 625?

 

The way I learned it is:

 

Format_____Video Resolution

CIF/SIF(525)___352 x 240

CIF/SIF(625)___352 × 288

4CIF/4SIF(525)_704 x 480

4CIF/4SIF(625)_704 × 576

D1(525)_______720 x 480

D1(625)_______720 x 576

 

* Sometimes 4SIF/4CIF is specified the same as VGA, which is 640 x 480 / 640 x 576.

* There is also 1/2 frame or 2CIF, which is based on removing the odd or even fields and is usually specified as either 640 x 240 or thereabouts.

[tomcctv 190]

Please lend me a hand, What dos it mean 525 & 625?

 

The way I learned it is:

 

Format_____Video Resolution

CIF/SIF(525)___352 x 240

CIF/SIF(625)___352 × 288

4CIF/4SIF(525)_704 x 480

4CIF/4SIF(625)_704 × 576

D1(525)_______720 x 480

D1(625)_______720 x 576

 

* Sometimes 4SIF/4CIF is specified the same as VGA, which is 640 x 480 / 640 x 576.

* There is also 1/2 frame or 2CIF, which is based on removing the odd or even fields and is usually specified as either 640 x 240 or thereabouts.

 

 

D1 (525) 720 x 480 is in NTSC

 

D1 (625) 720 x 576 is in PAL

 

PAL gives more lines then NTSC

[ISU4US 0]

Thank you very much

Please lend me a hand, What dos it mean 525 & 625?

 

The way I learned it is:

 

Format_____Video Resolution

CIF/SIF(525)___352 x 240

CIF/SIF(625)___352 × 288

4CIF/4SIF(525)_704 x 480

4CIF/4SIF(625)_704 × 576

D1(525)_______720 x 480

D1(625)_______720 x 576

 

* Sometimes 4SIF/4CIF is specified the same as VGA, which is 640 x 480 / 640 x 576.

* There is also 1/2 frame or 2CIF, which is based on removing the odd or even fields and is usually specified as either 640 x 240 or thereabouts.

 

 

D1 (525) 720 x 480 is in NTSC

 

D1 (625) 720 x 576 is in PAL

 

PAL gives more lines then NTSC

[vector18 1]

My PAL always gives me more lines than my non PALS.