Hello, jm know how many fps a VCR VHS / SVHS creates.
Antwort von grovel:
As Germany is the PAL TV standard, provides synonymous VHS and SVHS good with 25 fps. However, these are two fields thus actually technically 50fps interlaced.
SeeYa grovel
Antwort von svenhorn:
thank you! what about the well with the fields on himself. can imagine nothing less. my b / w camera makes 50fps. takes the vcr now 25 fps or 50 on??
Antwort von Jan:
There are 50 fields to 25 frames are shown here again an accurate description of full frames (progressive)-half frames (interlaced): (It was about the Video Camera Panasonic AG DVX 100 - the recording full frames)
The special s.25 P arises from the differences to PAL.Videosystem. One of the Pal Basics: A Picture Pal has 625 lines, it is transmitted line by line and displayed. Each picture is processed, but in two separate parts: The first field consists of the odd lines (1,3,5 ...) the second from the even (2,4,6 ...) On the screen, therefore, constantly changing odd and even fields from. This is known in English as an interlaced scan ". This procedure has several disadvantages: the two fields, such as 2 combs stuck together. Have the captured moving objects, the fields seem to be laterally offset. The overall picture seems broken, vertical edges are jagged, hard horizontal edges in the picture may result in a trembling effect. Each CCD chips in current Pal camcorder takes the same time to 576 lines. Why only 576 and not 625? Because of the 625 lines of the Pal system are only 576 actually used for the image content. The electronics read out all 576 lines. In a 2 step, they added more and 2 consecutive rows generated from the 288 lines so calculated one field. This approach brings greater light sensitivity with the same SNR and veringert the quivering effect. The addition of the line but has a hook! : It reduces the vertical resolution. Mismatch, the two fields simultaneously but in succession - the reason for the "dismemberment" The 25-P system has many advantages: it solves the problems described with interlaced images achieves a higher vertical Resolutionund fits better together with the world of computers and other equally progressive working displays . Although to be synonymous with 25P read the 576 rows of the CCD chip, the next step, however, is omitted: the addition of pairs of lines. The synonymous explains why the sensitivity is much lower at 25p. Instead, the camcorder records 576 lines as 2 consecutive 288 lines-fields. In contrast to the interlaced method eletrotechnics read in Progressive Scan So the two fields from the same time, they fit together perfectly. Tracked be progressively read out the two fields as in interlaced, which is why have photographs of the 25P camcorder itself with any PAL playback device. The impression is similar to the picture, shot on film of what one knows, but copied movies on video here. Sensitive viewers perceive this as a slight stroboscopic effect. Good profile is synonymous to higher vertical Resolutionim Progressive Mode. It results from the fact that there is no line addition.
Found in Videoaktiv digital edition March / April 2003
