General: Is Any One in to Blu-ray ?

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      CommentAuthorcoyote
    • CommentTimeSep 17th 2009
     

    If so, what are your opinions on this "new" format. Why do you think it's so complex in structure, is it really necessary ?
    I gather the Chinese have a system that uses a blue laser, but uses a similar recording system to standard DVD. How true this is and indeed is it as good, I don't know. Any thoughts ?

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      CommentAuthorcrazy pete
    • CommentTimeSep 17th 2009
     

    I work as a tech for a TV shop. The Blu-Ray standard is pretty straightforward. All players from launch onwards will play the main film content of any disk. Profile 1.1 added picture in picture for directors commentary type features. most of the first generation players were 1.1. Profile 2.0 added an ethernet port for BD live support (internet based rubbish extras). You'll find it difficult not to buy a 2.0 player these days.

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      CommentAuthorcoyote
    • CommentTimeSep 17th 2009
     

    Hi Pete, stand alone players generally work OK, but most are very slow to initialize the disc. after dissecting the structure of the disc, I'm not surprised it's so slow. I have one of the fastest reader/burners on the market at the moment, (Pioneer computer drive) it takes around thirty seconds just to read the disc. You can hear the servo zipping back and fourth gathering data. It's slightly longer for a BD+ disc.

    Then the player programme has to load the data and after another fifteen seconds or so the film will finally start.
    This is due to the folder/file structure of BD disc. As I said, it's very complex.

    To back up a copy to hard drive takes over two hours. I realise there is one heck of a lot more data on a BD, but I can file this much data from other sources in far less time. (taking in to account the drive read speed)

    Likewise, to burn a backup to a 50 Gig BD disk takes over four hours at times 4 speed. Can you see now where all that extra file data is going and doing ?

    I know some stand alone players load as fast as standard DVD's, but these seem fairly rare at the moment. I'm sure most will load fast in the not too distant future.

    Oh, by the way, because I'm clumsy and BD disc's are dear is the sole reason for backup to hard drive. The 50 Gig BD-RE disc was not cheap, but it was worth the money to learn how Blu ray works.

    The other interesting thing was to back up a standard DVD to a BD disc, great! A 25 Gig BD is big enough to take the longest film or three if you could get a menu of some kind and all with no transcoding or compression, it makes a superb backup.

    There's more, some Blu ray films a very poor quality, I'm not sure what went wrong, but some scenes are appalling visually. :(

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      CommentAuthorcoyote
    • CommentTimeSep 23rd 2009 edited
     

    By the response to this post I doubt if any one is interested in this subject, but I found this website. It gives great insight in to the complex workings of Blu ray. You may as well ignore the obsolete HD bits, but they are still quite interesting as a comparison. This section gives the main information. "Blu-ray Disc and HD DVD Folder and File Structure"

    http://www.videohelp.com/hd

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