why dd+ on blu-ray players?

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Does anyone really know why some blu-ray players come with dd+ when that was a hd dvd format, and to date Ive never saw the 1st blu-ray with that audio option?

[un4gvn94538]

according to dolby, its was manditory on hd dvd but optional on blu. since its optional, there may still be a disc in the future with it.

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Originally Posted by un4gvn94538

according to dolby, its was manditory on hd dvd but optional on blu. since its optional, there may still be a disc in the future with it.

Thanks, but I dont think it would compete with dd truehd and dts-hd mstr.

[JadedRaverLA]

Originally Posted by HOME THEATRE ADDICT!

Thanks, but I dont think it would compete with dd truehd and dts-hd mstr.

It's not designed to. It's just a lossy codec with support for more channels.

Originally Posted by HOME THEATRE ADDICT!

Does anyone really know why some blu-ray players come with dd+ when that was a hd dvd format, and to date Ive never saw the 1st blu-ray with that audio option?

You're right that DD+ was used heavily on HD DVD (it was a mandatory codec for that format) and rarely on BD. On BD the implementation is very crippled and really only designed to be used in situations where they want 6.1 or 7.1 channel support out of Dolby Digital.

In fact, using DD+ on BD, the main 5.1 channels are encoded at 640kbps (compatible with stnadard DD) and the rest of the audio bitstream (up to 1.5Mbps) is used only for the side surrounds. It's a haphazard implementation with little use given that Blu-ray has the space for lossless audio.

[Anthony P]

You're right that DD+ was used heavily on HD DVD (it was a mandatory codec for that format) and rarely on BD. On BD the implementation is very crippled and really only designed to be used in situations where they want 6.1 or 7.1 channel support out of Dolby Digital.

what you are missing is that on HD DVD DD was very crippled (like on DVD) and if someone wanted to offer DD 640 they needed to move up to DD+, which is why it was so much used on HD DVD, DD is not crippled on BD. But you are right to a point, DD+ only offers something in three situations,
1) if it is very low bitrate then it is better then DD (it has extra filters that help with compressing low bitrate)
2) if you go with more channels. The first is not supported by BD and useless.
3) I think it accepts higher sampeling frequency

1) is not supported by BD because it needs a true DD core, 2 is supported by BD, 3 I am not sure. The thing is that neither 1 nor 3 are very useful at all and very few come in 7.1 so there is no use going DD+ like with HD DVD (where you would be limited to around 500kbps DD

[un4gvn94538]

Originally Posted by HOME THEATRE ADDICT!

Thanks, but I dont think it would compete with dd truehd and dts-hd mstr.

didnt say it would compete. jsut giving a reason why some players have it like you asked

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Originally Posted by un4gvn94538

didnt say it would compete. jsut giving a reason why some players have it like you asked

Thankyou, so I guess they are a useless audio codec on a blu-ray player, which is fine since they are mastering more blus with one of the hd audio tracks! Was just curious as to why some players are capable!

[crackinhedz]

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[Sir Terrence]

Originally Posted by crackinhedz

MISSION IMPOSSIBLE: ULTIMATE MISSIONS COLLECTION

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Crackin,
In spite of what Brackett says, these are not DD+ at all. Bluray does not require DD plus, because Bluray was designed from the ground up to handle the increased packet size of 640kbps DD. HD DVD was not, and was only able to handle 448kbps DD. So in order to get the higher bit rate, DD plus is core DD plus the additional metadata that holds the additional packet size for bitrate above the core rate.

Bluray only supports DD to 640kbps, and all Dolby Digital processors can handle that bitrate without having to convert to PCM. Mission impossible soundtrack is encoded at 640kbps

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Originally Posted by Sir Terrence

Crackin,
In spite of what Brackett says, these are not DD+ at all. Bluray does not require DD plus, because Bluray was designed from the ground up to handle the increased packet size of 640kbps DD. HD DVD was not, and was only able to handle 448kbps DD. So in order to get the higher bit rate, DD plus is core DD plus the additional metadata that holds the additional packet size for bitrate above the core rate.

Bluray only supports DD to 640kbps, and all Dolby Digital processors can handle that bitrate without having to convert to PCM. Mission impossible soundtrack is encoded at 640kbps

Id like to have your setup!

[crackinhedz]

Originally Posted by Sir Terrence

Crackin,
In spite of what Brackett says, these are not DD+ at all.

yeah, I had a feeling it might not be completely accurate.