Sony HX1000 / HX900 flexible recording?!

Discussion in 'Blu-ray & DVD Players & Recorders' started by flyingotter, Oct 6, 2004.

  1. flyingotter

    flyingotter
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    Just read october issue of german magazine HIFI Test TV-Video about the new Sony HX1000 or HX900 recorders.
    In the test they are talking about recording using the built in timer. If you use that you can exactly fill the DVD disk to the maximum. For example 90 minutes of recording fills the complete DVD disk or virtual part of the harddisk.
    I never read that in the forums. Any1 knows about that feature.

    Secondly they talk about the HQ+ trick. Tape your recording in HQ+ in 15 Mbit. The Sony also analyses the film during recording in HQ+ and saves these to the harddisk. Now by dubbing to the DVD disk the Sony knows the complexity of the scenes and uses then the optimal datarate.
    Is this all true or just commercial waffle by Sony company?

    Thx for leting me know. There are now already Sony HX owners in the AV forums. Cheers!
     
  2. Rasczak

    Rasczak
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    The Sony models do not have a fit to disk option: if an example was given of 90mins then that is referring to the 90min recording mode available on the Sony.

    No this is true but they have got their wires slightly crossed. HQ+ is a recording mode that uses 15MBits/S as opposed to the DVD maximum of 9.8MBits/S. Obviously the higher bitrate means less detail is lost in the capturing process. It's a bit unnecessary in the UK - even blown up on a Projector the 9.8MBits/S picture from Sky/Freeview is virtually impossible to tell apart from the original (assuming good quality cables/recorder) - but anything that raises quality gets a thumbs up from me.

    Anyway what they are talking about when the Sony "knows the complexity of the scenes" has nothing to do with HQ+ (as it can be used for any of the Sony recording modes) - instead it is referring to the 2pass re-encoding the machine uses. As the name implies this process involves two 'passes' through the video: on the initial pass the machine decides which scenes require the most data and does some basic encoding. On the second pass the machine encodes into the new bitrate taking into account the 'knowledge' gained in the first pass. The end result is an impressive PQ on the re-encoded material.

    What the article was probaly suggesting was to record everything in HQ+ and re-encode to the nearest quality setting to fill the disk. Whilst this is true for programmes you know the length of your still best using the nearest quality mode as this avoids the need to re-encode (which, however well done, always reduces quality).
     
  3. CLH

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    In simple terms Sony force the user to transfer a 91 minute programme to DVD using 120 minute recording quality.

    Which I continue to consider an incredible omission.
     

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