Amatör Video Formatları

The cells that are left totally empty are ones for which I don't know the for answers yet. If you know the answers, please tell me. the order of the video systems are in approximate quality order, from the best to the worst (from my subjective point of view).
Video
P DVC N DVD DD P Ld N Ld DD / PCM P Bcast N Bcast P SVHS P Hi-8 P Beta P VHS N VHS P V8 CD-I
Domain Digital Digital Analog Analog Analog Analog Analog Analog Analog Analog Analog Analog Digital
Compression 5:1 60:1 Comp Comp Comp Comp Y/C Y/C Y/C Y/C Y/C Y/C 40:1
Luminance Horiz. Res. 500 500 450 420 400 330 400 400 250 240 240 230 240
Luminance Vert. Res. 576 480 576 480 576 480 576 576 576 576 480 576 280
Luminance S/N Ratio 54 48 52 55 55 46 45 43 43 45 48
Chroma Horiz. Res. 250 250 100 70 100 70 40 40 45 40 40 40 120
Chroma Vert. Res. 200 240 200 480 200 480 140 140 200 140 160 140 140
Chroma S/N Ratio 54 48 48
Frames/s 25 30/24 25 30 25 30 25 25 25 25 30 25 25
Interlace Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No
Compr. Artifacts Minimal Minor / Some Dot crawl Dot crawl Dot crawl Dot crawl No No No No No No Severe
Audio Columns
Video
P DVC N DVD DD P Ld N Ld DD N Ld PCM P Bcast N Bcast P SVHS P Hi-8 P Beta P VHS N VHS P V8 CD-I
Domain Digital Digital Digital Digital Digital Digital Analog Analog Digital Analog Analog Analog Analog Digital Digital
Compression No N-lin 10:1 No 10:1 No 14:10 - DBX N-lin. DBX DBX N-lin. 5:1
Sampling Bits 16 12 18..20 16 18..20 16 14 - - 8 - - - - 8 16
Sample Rate 48000 32000 48000 44100 48000 44056 32000 - - 32000 - - - - 32000
S/N Ratio 96 90 90 96 90 96 84 65 90 85 65 90 90 90 85 96
Low Frequency 5 5 5, 2 5 5, 2 5 5 60 20 20 30 20 20 20 20 20
High Frequency 22k 15k 20k, 120 20k 20k, 120 20k 15k 15k 20k 15k 14k 20k 20k 20k 15k 20k
Channels (+low quality) 2 4 n x 5.1 2 5.1 (+2) (+1) 2 (+2) 2 (+1) 2 (+1) 2 (+2) 2 2 (+1) 2 (+1) 2 (+1) 2 (+2) 2 2
P DVC: PAL Digital Video Cassette
DVD: Digital Video Disc
P Ld: PAL Laserdisc
N Ld DD: NTSC Laserdisc with 5.1 track Dolby Digital (AC-3) audio
N Ld PCM: NTSC Laserdisc with conventional digital PCM audio
P Bcast: PAL Broadcast
N Bcast: NTSC Broadcast
P SVHS: PAL Super-VHS
P Hi-8: PAL Hi-8
P Beta: PAL Beta
P VHS: PAL VHS
N VHS: NTSC VHS
P V8: Pal Video-8. Notice, that digital sound is not typical of consumer models. See Hi-8 columns for info on analog sound.
CD-I: Philips CD-I or MPEG-1


Rows
Video
Domain: Is the video signal in the digital or analog domain?
Compression: If digital, how much is the video signal compressed? If analog, in which way is the signal stored?
Comp: Composite video. It is the responsibility of the receiver to recover the luminance and chrominance part of the signal.
Y/C: Separate video. the luminance and chrominance parts of the picture are stored separately in the video stream. thus they may also be sent to the receiver separately. (this is however often not the case. For instance, I've yet to see a consumer VHS deck with Y/C outputs.)
Luminance Horiz. Res.: Luminance horizontal resolution (lines)
Luminance Vert. Res.: Luminance vertical resolution (lines)
Luminance S/N Ratio: Luminance signal-to-noise ratio (dB)
Chroma Horiz. Res.: Chrominance horizontal resolution (lines)
Chroma Vert. Res.: Chrominance vertical resolution (lines)
Chroma S/N Ratio: Chrominance signal-to-noise ratio (dB)
Frames/s: Maximum amount of full, different frames/second (f/s)
Interlace: Is the image displayed in an interlaced fashion?
Compression Artifacts: If the image is compressed, does the compression produce visible artifacts? (dot crawl is what happens when a TV set can't separate luminance from chrominance properly.)


Audio
Domain: Is the audio signal in the digital or analog domain?
Compression: If digital, how much is the sound compressed? If analog, what companding method is used?
Sampling Bits: If digital, the amount of bits used in sampling before compression
Sample Rate: If digital, the sampling rate (samples / s)
S/N Ratio: the signal to noise ratio of sound with noise reduction (dB)
Low Frequency: the lowest frequency the system can reproduce without attenuating more than 3 dB (Hz)
High Frequency: the highest frequency the system can reproduce without attenuating more than 3 dB (Hz)
Channels (+low quality): Channels that can be used. In parenthesis are the analog channels of NTSC laserdiscs and linear tracks of VHS video.


Calculating Horizontal Resolution

Although calculating vertical resolution is simple (the amount of horizontal scanlines), horizontal resolution is a little trickier thing.

In video industry, horizontal resolution is given as if the video screen was as wide as it is tall. this way, if a video device has the same horizontal and vertical resolution, it can be thought of having "square pixels". If you want to know how many vertical lines the device actually can display, (for the whole width of the screen, that is), you have to multiply the given resolution with 4/3, which is the aspect ratio for normal display devices.

For instance, if you have a Amiga computer that can display graphics (in low-res interlace mode) at a computer resolution of 368x564, the video resolution is 368*3/4 x 564 = 276 x 564, which is little better than VHS. the other way around: If you have an NTSC LD player, that has a horizontal resolution of 420 lines, you can actually have 420*4/3 = 560 vertical lines, or horizontal pixels, on your TV screen.

this is why, for instance, the given horizontal luminance resolution of CD-I is not given as 320, but 240 (320 * 3/4). the number would be even less if proper low-pass filtering was used, but in CD-I, nothing is done to prevent pixels from showing out.

On the other hand, the theoretical resolution of DVD would be 540 video lines with my calculations. However, since the signal is low-pass filtered (just as it should be), little less than 10% (40 lines) is lost in the process.