DavidG
Grip
- Joined
- Aug 11, 2002
- Messages
- 15
Roger - a pleasure to have your contributions here.
Dave Moritz raises some valid points, and of course opinions that may differ from others - but that is what this forum is all about!
I have to chew on the DD+ proposal some more, but IMO it appears Dolby is doing what it needs to do - keeping pace with technology advances. Contrary to what Dave suggests, data compression techniques are constantly undergoing refinements whereby they become more efficient at data compression. This doesn't mean poorer quality automatically and it usually results in better quality at a given data rate than the previous generation. Within a given technology version, more bandwidth usually results in better quality.
That said, I'm a DTS fan and prefer most DTS soundtracks over the DD version. DD absolutely degrades the sound quality as compared to full resolution (PCM) of 2 channel or 5.1 soundtracks. So does DTS, but because of usually higher bitrates and IMO better perceptual encoding algorithms they sound better. However when DTS is compressed to the same bitrate as DD it becomes difficult to tell them apart.
DD+ is needed by Dolby Labs to remain current with latest movements in audio/video playback systems. They need more than 5.1 channels. As well, as Roger points out, the digital media providers (cable and satellite) are still working with limited bandwidth pipes and market pressures to provide more content (I know everyone here wants more shopping channels ). Since DTS can support more than 5.1 channels, so must DD to remain competitive. Since cable and satellite must compress to get all the channels they want to provide over their mediums then that also puts pressure on bandwidth consumed by audio. If Dolby can come up with an encoding technique that enables equal or even better audio quality while reducing or maintaining bandwith required then the carriers will likely go for it.
Will quality get hurt? We don't know yet. We will need experts to review the solution provided by Dolby and give us objective and subjective results. The other major variable here will be the content carriers - will they use this with too much compression causing poorer audio quality? I certainly hope not.
Now, what I want IS better audio quality than DD currently provides even in max bitrate with the redbook DVD. DTS and Meridian (MLP!!!) are my heroes, and I am thankful for the competitive pressure they are putting on Dolby. When we go to HD-DVD, I want 24/96 (or better!) audio quality on all channels (6.1->7.1). I'm concerned that if DD+ is adopted then that will require new hard video formats (like DVD) to carry another audio stream taking up more medium data space. What's high-def video without high-def audio? That's where I'll also vote with my money.
Cheers,
DavidG
Dave Moritz raises some valid points, and of course opinions that may differ from others - but that is what this forum is all about!
I have to chew on the DD+ proposal some more, but IMO it appears Dolby is doing what it needs to do - keeping pace with technology advances. Contrary to what Dave suggests, data compression techniques are constantly undergoing refinements whereby they become more efficient at data compression. This doesn't mean poorer quality automatically and it usually results in better quality at a given data rate than the previous generation. Within a given technology version, more bandwidth usually results in better quality.
That said, I'm a DTS fan and prefer most DTS soundtracks over the DD version. DD absolutely degrades the sound quality as compared to full resolution (PCM) of 2 channel or 5.1 soundtracks. So does DTS, but because of usually higher bitrates and IMO better perceptual encoding algorithms they sound better. However when DTS is compressed to the same bitrate as DD it becomes difficult to tell them apart.
DD+ is needed by Dolby Labs to remain current with latest movements in audio/video playback systems. They need more than 5.1 channels. As well, as Roger points out, the digital media providers (cable and satellite) are still working with limited bandwidth pipes and market pressures to provide more content (I know everyone here wants more shopping channels ). Since DTS can support more than 5.1 channels, so must DD to remain competitive. Since cable and satellite must compress to get all the channels they want to provide over their mediums then that also puts pressure on bandwidth consumed by audio. If Dolby can come up with an encoding technique that enables equal or even better audio quality while reducing or maintaining bandwith required then the carriers will likely go for it.
Will quality get hurt? We don't know yet. We will need experts to review the solution provided by Dolby and give us objective and subjective results. The other major variable here will be the content carriers - will they use this with too much compression causing poorer audio quality? I certainly hope not.
Now, what I want IS better audio quality than DD currently provides even in max bitrate with the redbook DVD. DTS and Meridian (MLP!!!) are my heroes, and I am thankful for the competitive pressure they are putting on Dolby. When we go to HD-DVD, I want 24/96 (or better!) audio quality on all channels (6.1->7.1). I'm concerned that if DD+ is adopted then that will require new hard video formats (like DVD) to carry another audio stream taking up more medium data space. What's high-def video without high-def audio? That's where I'll also vote with my money.
Cheers,
DavidG