Difference between Dolby Digital and Dolby Tru HD Audio??

[JrCT0091]

Any insight out there as to the exact difference between English Dolby True HD 5.1 vs. English Dolby Digital 5.1 Audio selections?? They seem to be 2 different Audio options on the Blu-Ray movies, but I'm not sure which one to choose, which one is better, etc.? My Receiver is the Yamaha RX-V661 and I have the standard Center, Front, Rear Speakers and SubWoofer....any insight is well appreciated...thanks!

[Villain2100]

DD Tru Hd is better beacuse its HD audio and is sampled at a much higher bitrate, if your amp supports it select that.

[BIslander]

Originally Posted by JrCT0091

Any insight out there as to the exact difference between English Dolby True HD 5.1 vs. English Dolby Digital 5.1 Audio selections?? They seem to be 2 different Audio options on the Blu-Ray movies, but I'm not sure which one to choose, which one is better, etc.? My Receiver is the Yamaha RX-V661 and I have the standard Center, Front, Rear Speakers and SubWoofer....any insight is well appreciated...thanks!

DD 5.1 is a lossy codec, which means some of the original audio data is lost in the encode/decode process. TrueHD is a lossless codec, meaning all of the original bits are present when the track is decoded.

Lossless formats cannot be transmitted over optical or coax connections. They require HDMI or a player that can do the decoding for output over multichannel analog cables. So, depending on your equipment, TrueHD may not be an option for you.

TrueHD has more audio data than DD 5.1. But, it is not necessarily better in sound quality than the DD 5.1 encodes on Blu-ray. There are lots of variables that can affect audio quality.

[ludawg23]

Originally Posted by BIslander

DD 5.1 is a lossy codec, which means some of the original audio data is lost in the encode/decode process. TrueHD is a lossless codec, meaning all of the original bits are present when the track is decoded.

Lossless formats cannot be transmitted over optical or coax connections. They require HDMI or a player that can do the decoding for output over multichannel analog cables. So, depending on your equipment, TrueHD may not be an option for you.

TrueHD has more audio data than DD 5.1. But, it is not necessarily better in sound quality than the DD 5.1 encodes on Blu-ray. There are lots of variables that can affect audio quality.

Not entirely true. You can get loseless audio over optical/coax...but only in 2 channel

[WriteSimply]

Originally Posted by ludawg23

Not entirely true. You can get loseless audio over optical/coax...but only in 2 channel

Semantics. Of course he MEANT Dolby TrueHD and not stereo LPCM.

Dolby TrueHD/DTS HDMA bitstream and 5.1/7.1 LPCM can only be transmitted via HDMI.


fuad

[BIslander]

Originally Posted by ludawg23

Not entirely true. You can get loseless audio over optical/coax...but only in 2 channel

The OP was asking about multichannel soundtracks. Loseless? What's that?