Understanding HD...

[Zangetsu]

Hi Guys,

Lots of u have watched Full-HD Content (1080p).
So I wanna clear the concept of 'what is HD'.

High-Definition Video consists of two things
A.Resolution above 720p but 1080p is full HD.

B.Video Bitrate the more the bitrate the more the crsytal clarity...

But I have a question on point...by only resolution of 1080p doesnt mean dat the content is Full-HD...coz low resolution videos can also be upscaled to 1080p using converters.....

so,point B also is essential..what do u say?

any other core component u know?

[Vyom]

Frame Rate? It should be atleast 25, but 30 is also common.
I think by Bit rate you mean Data rate. Since Bit rate is usually associated with the Audio part of a video file.

[gameranand]

Originally Posted by Zangestu

But I have a question on point...by only resolution of 1080p doesnt mean dat the content is Full-HD...coz low resolution videos can also be upscaled to 1080p using converters.....

Yes they can be upscaled. It depends whether the video has been recorded in 1080p or not.

Originally Posted by Zangestu

so,point B also is essential..what do u say?

Well of course its essential. Try to lower it too much and you'll see the results.
As Vineet said Frame rate is also important. And the other important parts are container, codec and many things that coming together makes a Video say if you have a damn good quality but a bad Audio so would you say that the video was good .

[coolpcguy]

by only resolution of 1080p doesnt mean dat the content is Full-HD.

by definition any video having a resolution greater than 1280x720 ( aka 720p) is termed as HD. As the resolution goes beyong that, more and more prefixes get added. Full HD, Ultra Max Hd yadda, yadda.

[abhidev]

Originally Posted by Zangetsu

Hi Guys,
But I have a question on point...by only resolution of 1080p doesnt mean dat the content is Full-HD...coz low resolution videos can also be upscaled to 1080p using converters.....

Any video having 1080p is termed as full HD...it maybe upscaled but as far as it displays 1080 pixels vertically

[Zangetsu]

Originally Posted by vineet369

Frame Rate? It should be atleast 25, but 30 is also common.

but a framerate of 23.XX fps is also good
Btw framerate is associated with motion....& not Crystal Clear Clarity

Originally Posted by vineet369

I think by Bit rate you mean Data rate. Since Bit rate is usually associated with the Audio part of a video file.

Nope....I mean Video Bitrate & not audio bit rate they both r different

Originally Posted by gameranand

And the other important parts are container, codec and many things that coming together makes a Video

Not Necessary if u neglect the file size.
say an MP4 can also be a good container as MKV for an HD Content

Originally Posted by gameranand

say if you have a damn good quality but a bad Audio so would you say that the video was good.

Audio is for Hearing...& HD videos r 5.1 channel
its vision aspect of HD...

Originally Posted by abhidev

Any video having 1080p is termed as full HD...it maybe upscaled but as far as it displays 1080 pixels vertically

No use of upscaling...it just covers ur LCD screen size..but will be heavily pixelated....

[gameranand]

Originally Posted by Zangestu

Audio is for Hearing...& HD videos r 5.1 channel
its vision aspect of HD...

If you get the video from a legit source then AFAIK video won't be upscaled and audio would be good but you can't guarantee that for other sources also which provide good visual but bad audio. I said that regarding those videos.

Originally Posted by Zangestu

No use of upscaling...it just covers ur LCD screen size..but will be heavily pixelated....

It will be still called HD. Thats why I mentioned

Originally Posted by gameranand

It depends whether the video has been recorded in 1080p or not.

[Zangetsu]

^^ Buddy recording a video in 1080p format is completely different from a upscaling a video in 1080p.....

dont compare a upscaled 640*240 video to 1080p ---> a HD video recorded by a cam corder (1080p)

[Vyom]

^^ Absolutely agree. I wonder why upscaling is done in the first place? Since we can watch a low-res video also in full screen, which would fill the entire screen, and of course still be pixelated!

[asingh]

I think this explains it good detail..!

[Zangetsu]

Cud u guys post the details of the best HD 1080p content u have seen...
details such as resolution,video bitrate,fps etc

[gameranand]

Here is mine
General
ID : 741 (0x2E5)
Complete name : F:\Songs\English Video\Shakira\SHAKIRA - HIPS DONT LIE.ts
Format : MPEG-TS
File size : 445 MiB
Duration : 4mn 6s
Overall bit rate : 15.1 Mbps

Video
ID : 17 (0x11)
Menu ID : 1 (0x1)
Format : MPEG Video
Format_Commercial_IfAny : HDV 720p
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=15
Codec ID : 2
Duration : 4mn 6s
Bit rate mode : Variable
Bit rate : 13.9 Mbps
Nominal bit rate : 15.0 Mbps
Maximum bit rate : 15.4 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.253
Stream size : 410 MiB (92%)

Audio
ID : 20 (0x14)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 129
Duration : 4mn 6s
Bit rate mode : Constant
Bit rate : 448 Kbps
Maximum bit rate : 504 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -232ms
Stream size : 13.2 MiB (3%)
Language : English

Text #1
ID : 17 (0x11)608-1
Menu ID : 1 (0x1)
Format : EIA-608
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 4mn 6s
Stream size : 0.00 Byte (0%)

Text #2
ID : 17 (0x11)1
Menu ID : 1 (0x1)
Format : EIA-708
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 4mn 6s
Stream size : 0.00 Byte (0%)

Menu
ID : 16 (0x10)
Menu ID : 1 (0x1)
Duration : 4mn 6s
List : 17 (0x11) (MPEG Video) / 20 (0x14) (AC-3, English)
Language : / English
Maximum bit rate : 16201200


Although its 720p but its the best I have ever seen.
I have seen 1080p content but nothing like this.

[Zangetsu]

Originally Posted by gameranand

Bit rate : 13.9 Mbps
Nominal bit rate : 15.0 Mbps
Maximum bit rate : 15.4 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps

Although its 720p but its the best I have ever seen.
I have seen 1080p content but nothing like this.

59.940fps....gr8
is there any pixelation on full screen

y this 3 different bitrates??
I think bitrate above 10Mbps is excellent

[gameranand]

Originally Posted by Zangestu

is there any pixelation on full screen

No its crystal clear even with all those disco lights.

Originally Posted by Zangestu

y this 3 different bitrates??

Because of this

Bit rate mode : Variable

[nims11]

What about1080i, in which providers like tata sky provide HD channels? Isnt it the same as 720p?

[ico]

Originally Posted by nims11

What about1080i, in which providers like tata sky provide HD channels? Isnt it the same as 720p?

Gogole about Progressive scan (p) and Interlaced video (i).

Progressive scan vs. interlaced video | Axis Communications

Interlaced vs. Progressive Signals

The Big Picture - Interlaced vs. Progressive, Fields vs. Frames, 3:2 pulldown and Inverse Telecine (page 1 of 2)

1080 and 720 are just the number of vertical lines.

[gameranand]

@ nims11
Have a look at this
Wikipedia 1080i

[Dangerous Dave]

Originally Posted by gameranand

Here is mine
General
ID : 741 (0x2E5)
Complete name : F:\Songs\English Video\Shakira\SHAKIRA - HIPS DONT LIE.ts
Format : MPEG-TS
File size : 445 MiB
Duration : 4mn 6s
Overall bit rate : 15.1 Mbps

Video
ID : 17 (0x11)
Menu ID : 1 (0x1)
Format : MPEG Video
Format_Commercial_IfAny : HDV 720p
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=15
Codec ID : 2
Duration : 4mn 6s
Bit rate mode : Variable
Bit rate : 13.9 Mbps
Nominal bit rate : 15.0 Mbps
Maximum bit rate : 15.4 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 59.940 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.253
Stream size : 410 MiB (92%)

Audio
ID : 20 (0x14)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 129
Duration : 4mn 6s
Bit rate mode : Constant
Bit rate : 448 Kbps
Maximum bit rate : 504 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -232ms
Stream size : 13.2 MiB (3%)
Language : English

Text #1
ID : 17 (0x11)608-1
Menu ID : 1 (0x1)
Format : EIA-608
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 4mn 6s
Stream size : 0.00 Byte (0%)

Text #2
ID : 17 (0x11)1
Menu ID : 1 (0x1)
Format : EIA-708
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 4mn 6s
Stream size : 0.00 Byte (0%)

Menu
ID : 16 (0x10)
Menu ID : 1 (0x1)
Duration : 4mn 6s
List : 17 (0x11) (MPEG Video) / 20 (0x14) (AC-3, English)
Language : / English
Maximum bit rate : 16201200


Although its 720p but its the best I have ever seen.
I have seen 1080p content but nothing like this.

where did you get this video from i need it

[gameranand]

Originally Posted by Dangerous Dave

where did you get this video from i need it

You just have to install Klite Codec Pack This feature comes with it. After you have installed it then a option Media info in the right click context menu of any playable file. Be it video or Audio.

[sujoyp]

Originally Posted by gameranand

You just have to install Klite Codec Pack This feature comes with it. After you have installed it then a option Media info in the right click context menu of any playable file. Be it video or Audio.

Bro he needs the video itself and not the information of video

[Zangetsu]

Originally Posted by gameranand

You just have to install Klite Codec Pack This feature comes with it. After you have installed it then a option Media info in the right click context menu of any playable file. Be it video or Audio.

he is asking for the video...u got from where???

[mitraark]

Well if you want 1080p Music Videos Youtube has quite good collection [ Not as good as BD Rips but good enough ]

YouTube - Rebecca Black - Friday (OFFICIAL VIDEO)

Select 1080p from Bottom Right COrner of video. Download the Video using IDM or keepvid.com

[Zangetsu]

^^Are BD Rips good in quality....

I mean peopled download video of whopping sizes of 25~40GB r they also BD Rip???

[Vyom]

Originally Posted by mitraark

Well if you want 1080p Music Videos Youtube has quite good collection [ Not as good as BD Rips but good enough ]

YouTube - Rebecca Black - Friday (OFFICIAL VIDEO)

Select 1080p from Bottom Right COrner of video. Download the Video using IDM or keepvid.com

OFFTOPIC:
LOL: Do you really like that Black Friday song, supposedly the most disliked song of all time?

OnTopic:
Finding HD videos on youtube is not hard to find at all. Just search for any song, and filter the results by "Only HD videos"

[abhidev]

She seems to be some firang sis of Himmesh reshamiya....

[Zangetsu]

Guys I have a video file whose resolution is 1920*1080p (i.e full HD)
but when I play the video I can see two parallel black strips...does 1080p has black strips
or does it play full screen???

[asingh]

^^
It should not have those strips. You need to change the scaling on the graphics adapter.

[Vyom]

@Zangetsu:
Those black strips which you are witnessing are to compensate the mismatch of ratio's between that of the video to that of the screen resolution.
Its simple maths.
Find ratio of video = eg, if video is 1280 x 544, then Video ratio = 2.35
ratio of screen res = which is, 1920 x 1080 = 1.77.

So clearly in the examples above, video is More wide than the resolution of the screen, and hence the horizontal lines.

If you are using VLC, you can try to decrease the video ratio by changing Aspect Ratio, right click Video -> Aspect Ratio.
But remember this can make the video stretched. (That is actors would look longer than usual).

[asingh]

^^
Both his file and monitor are 1080pi. He will need to check the settings on his adapter. It is just a simple tweak. Or change resolution on his player. It will not stretch to show awkward.

[Anorion]

unfortunately even "technically" is a vague term here, depends on the screen pretty heavily here. HD is frame size, as well as the frame rate. The frame size is 1280x720 or higher, and the frame rate is 60 fps or higher. this is in theory, and all digital data invariably has compression, and the video standards are pretty lossy MPEG is one example, but every compression method is just another name for loss in some kind of video quality. So yeah HD video is no guarantee for quality, the less "lossy" the compression, the better, but there are bloated file formats too, MPEG may even be one of them.