Les premiers tests de médias Blu-Ray viennent d'être publiés pat c't magazine:
et ont été résumés par MediumRare sur CDRLabs
ici:
http://www.cdrlabs.com/phpBB/viewtopic.php?t=21949
MediumRare a écrit:The German computer magazine c't has 3 articles on HD-discs in the newest issue No. 15/2006, now on the newsstands in Europe. If you can get it, it's well worth looking at!!
The third article is the most interesting (at least for me
). They tested 2 BluRay burners with the presently available media types. I'll try to summarize the results in a similar style to the
DVD tests.
Media
There are presently 5 brands (and 4 manufacturers) available or in preproduction. All come as both write-once (BD-R) and rewritable (BD-RE). The Fuji media is made by Matushita (Panasonic), Verbatim (Mitsubishi) are preproduction samples.
c't burned samples of all media with both drives (except the Verbatim: Pioneer only). The Pioneer-burned disks were measured by Audiodev, subjected to a cliamtic stabilty test with 100 hours at 80° C and 85% rel. humidity and tested again at selected radial positions. Because of the tight schedule, the Panasonic discs were also tested at selected positions only.
The results (index and grade) are summarized in the following table. All discs were burned at 2x CLV (9 MiB/s). In contrast to DVD's, c't did not specify a "mechanical index" for the unburned discs. I hope they add this information in subsequent tests.
- Code: Tout sélectionner
disc manuf. ID Pioneer Panasonic Pioneer
climatic
BD-RE25 Sony SONY (001) 87 / ++ 85 / ++ 73 / +
BD-RE25 TDK TDKBLDWBA (000) 70 / + 61 / + 72 / +
BD-RE25 Panasonic MEI (001) -61 / -- 67 / + -103 / --
+ Fuji
BD-RE25 Verbatim VERBATIM0 (000) -94 / nr na -266 / nr
sample
BD-R25 Sony SONY (001) 21 / - 67 / + 78 / ++
BD-R25 TDK TDKBLDRBA (000) -7 / -- 84 / ++ 64 / +
BD-R25 Panasonic MEI (001) -103 / -- 58 / + -199 / --
+ Fuji
BD-R25 Verbatim VERBATIMa (000) -69 / nr na -34 / nr
sample
Remarks:
- In all, the quality and compatibility is very good for this early stage in the product cycle.
- The best results were attained by the Sony and TDK BD-RE.
- Most discs exceeded the jitter margin but did not show pronounced extrema in the curves.
- Bowing generally remained within spec, even after the climate test
- A tendency to increasing RSER10K with radius indicates problems with the uniformity of the applied lower layer.
- Pioneer had problenms with some discs. Firmware update will probably help.
- The Verbatim media are preproduction samples and were not graded. The poor climatic showing of the BD-RE is due to increased jitter and needs work prior to volume production
- The Panasonic drive did better than Pioneer and is able to read and write CD's as well thanks to the dual lenses in the PUH.
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