Newsmeldung von slashCAM:24 Mbps AVCHD camcorder Canon HF11 test of thomas - 16 Aug 2008 13:43:00 One of the two new (the other is the Canon HG21) AVCHD cams of Canon, with the specified the maximum 24 Mbit / s recording. The HF11 comes with 32GB internal memory, which HGG21 with a 120GB hard drive. Both feature a 1/3.2 inch CMOS, 12X optical zoom, 2.7 inch Display, Optical Image Stabilization, a SD / SDHC card slot and take 1920 × 1080 AVCHD on. price of the HF11: so s.1300 euro HG21 s.1400 Euro s.Mitte September in the trade. In a test of your camcorder, the HF11 Info cuts very well, although the quality of growth through the increased bitrate hardly noticeable than substance. Like the first 8 months ago presented predecessor HF10 is the image quality is very good - also praised the doubling of the memory size to 32GB.
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Antwort von domain:
According WoWu can be in terms of bitrate AVCHD do not think more linearly, like mpeg2.
Why should thus increasing the bit rate to improve the image take? And the practice seems to confirm WoWu yes pretty much
Antwort von wolfgang:
The fact that an improvement in the horizontal and vertical resolution is not reached, is the fact that this is virtually only marginally developed next HF10, is not surprising. How should the data synonymous higher resolution images in the static effect?
That the propensity for motion artifact reduced next is also to be expected - and that when the increase of 17 to 24 mbps but only slightly improved, is probably synonymous clear. HDV could however with the 24 mbps is now more dependent on - but that was not tested.
In sum will be the higher data rate naturally give preference to, because you move faster so that it still has a stronger grip. But one may wonder in otherwise unchanged Optics and Signal Processing no longer expect - this was the HF10 too good.
The next exciting duel is in truth, whether in the Panasonic 151 again a clear "more" s.Bildqualität will show. And it will be interesting to see when finally a 1080 50p AVCHD camcorder of a major manufacturer of AVC devices in the consumer area will appear, and what will bring together s.Bildqualität.
Antwort von domain:
So it is but at least moving images as linear as previously thought next to mpeg2, right?
Antwort von WoWu:
@ Domain
No, you should not.
And I have made Wolfgang's portrayal synonymous not read ...
H.264 consists of 7 Profiles and profiles of each turn, from approx. 10 levels.
One can thus the "linear thinking" only if it is the identical profiles are ..... then it acts in some ways ... but not really synonymous, synonymous, for example, because then I have different numbers of frames can be used (to 16) and also a different weighting of the B-frames can get ... which is then precisely how the manufacturer implemented ... So far there are more possibilities for image enhancement is available.
HDV linearly so we were able to consider because we are always identical with the GOP had to do .... and there was always an I-frame, which was pushed into memory, processed and cleared .... over!
But the major step in the data can be synonymous to the next step of the profiles, which then additional, more far-reaching tools for image editing services.
Nor is the choice of the reduction varied ways: With the use of CABAC leads to a significant reduction in data rate (around 20%), but synonymous for a hefty increase in the performance requirement s.den calculator ...
You see, then, we must first know exactly what tools the manufacturer uses to determine the possible picture quality from it .... the data is still only a rough indication, in which profiles the entire place.
Also the conclusions "of 17 to 24 = poor probably" can not draw ... for example, if 17 Without CABAC, then step into a higher profile, but with CABAC = 24, then it would jump dramatically in the tools ... and the quality could be significantly better. (Whether the Canon now so, I do not know, but I would at least predictions such as described above, no longer dare).
And it will be interesting to see when finally a 1080 50p AVCHD camcorder of a major manufacturer of AVC devices in the consumer area will appear This would first of the standardization are .... but not yet and not likely to advance to the Manufacturer ice move.
With 1080p50 could Diagonal-sampling should be introduced, giving us the data on the status of the P25 would hold.
But since we are still on it for a while waiting.
How should the data synonymous higher resolution images in the static effect? No. Resolutionist static, and if it's just noise in the picture is. But then again affect the in-loop tool ... So synonymous with "quasi-static" resolution, a higher data rate effect.
But one may wonder in otherwise unchanged Optics And that is the crux of the matter ... as long as the actual optics Resolutiongar not hergeben and man of the impact of the Bayer mask the Picture deliberately blurred keeps ... there's really no wonder.
The bottleneck is not the codec .... Larger chips, so that the high requirements of the optics used and 3 chips, so these unspeakable Bayer mask finally times of the past can ... or just photonic filter.
Until Manufacturer nothing, can you really Pixelzählerei with the status quo at the end ... I agree the way, Bruno is absolutely right ... synonymous as you can (almost) for HDV remain ... (Something überschärft-order to stay in the genre-).
But perhaps you should synonymous Manufacturer others do not really lose sight ....
