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Bronze Member Username: 1lakerfanPost Number: 53 Registered: Apr-06 | I was on a website and it had a ad for blue ray movies and it said blue rays had HD surround. I knew it made picture better but does it make sound, sound better to? |
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Platinum Member Username: Project6Post Number: 11718 Registered: Dec-03 | In theory it does. |
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Gold Member Username: John_sColumbus, Ohio US Post Number: 1201 Registered: Feb-04 | The higher storage capacity of both blue laser formats (Blu-ray and HD DVD) afford greater digital sound quality as well as more channels. All this while still supporting standard Dolby Digital, DTS and PCM at sample rates of 48 and 96kHz. As with standard DVD players these new blue laser players will output the DD and DTS bitstreams via optical and/or coax outputs and will be recognized by standard decoders common to all modern pre/pros and AVRs. These standard DD and DTS tracks may sound better as the new players will operate at the highest possible data rate of 640kbps---most standard DVD players operate at 384 or 448kbps. More importantly, there are two more layers of high quality digital audio possible on these new discs. The first is Dolby Digital Plus. DD+ allows bitrates up to 3Mbps on HD DVD and up to 6Mbps on Blu-ray. In addition to many more bits per second, Dolby improved the encoding algorithms in DD+ for better sound. The DTS equivalent to DD+ will be known as DTS-HD. The second is the ultimate in sound quality called Dolby TrueHD. It delivers high-resolution multichannel audio with perfect bit-for-bit accuracy to the source. This "lossless" codec will give the listener the exact same sound that was recorded in the studio without any compression of the digital bitstream. The DTS equivalent to TrueHD is called DTS-HD Master Audio. For the time being, these higher resolution tracks will be available only via the player's multi-channel analog line outputs. Eventually, the new HDMI 1.3 will be able to carry all these audio codecs to an AVR/pre-pro equipped with the appropriate decoder(s). Surprisingly, Blu-ray players are not required to support any of the hi-res audio formats outlined above. Nor are they required on the movie (or other content) disc releases. Competitive market forces will dictate that players of both formats will support all the hi-res audio formats. I would expect that DD+ and DTS-HD will become standard on HD-DVD and Blu-ray discs, while the lossless codecs Dolby TrueHD and DTS-HD Master Audio might be reserved for musical performances and concert discs. http://en.wikipedia.org/wiki/Dolby_Digital#Dolby_Technologies_in_packaged_media_ formats http://en.wikipedia.org/wiki/Digital_Theater_System#DTS_variants http://www.dolby.com/consumer/technology/trueHD/AVRs/trueHD_avrs_3.html |