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Audio Formats Help
Is anyone able to explain all the different options for A/V Receivers.
Here is what I have discovered so far (not sure if its all true). Formats: Dolby: - Dolby Pro Logic II - Creates 5.1 channel sound out of stereo (two types one for music, one for movie). - Dolby Digital - 5.1 surround sound format - Dolby Digital EX - 6.1/7.1, create an additional 1/2 channels of sound for back speakers (information is gathered from L&R back speakers from the 5.1 channel information). DTS: - DTS - Another 5.1 surround sound format (comparable to Dolby Digital, but many say has a slight edge over Dolby Digital). - DTS ES - 6.1/7.1 channel DTS format. Two types Matrix 6.1 (uses info from 5.1 channels information like Dolby Digital EX) and Discrete 6.1 (actually uses 6.1 channels). - DTS Neo:6 - Creates 6.1 channel sound out of stereo - In addition, you can get 96/24 version of DTS (instead of 48/24???). Other Audio: - CD - 44/16 - HDCD - 44/20 ??? - SDDS - Sony proprietary sound (not sure sampling, etc). I believe this format is not used, maybe replaced with SACD?? - SACD - Sony/Phillips new audio format (no equivilant for sampling because uses bit stream) - DVD-A - 192/24 stereo and 96/24 5.1 channel. Can you play stereo at 96/24 if that is all your receiver can support (or do you have to play the 5.1 channel)??? But here is where I get confused: 1) I have seen receivers that show 5.1/6.1/7.1 channel inputs, but I thought that (except for DTS ES) the channels are created out of 5.1. Are the 6.1&7.1 inputs only used for DTS ES. Also, why do I never see 6.1 and 7.1 both as inputs (I only ever see one or the other) is 7.1 backwards compatible? 2) I have seen DAC for 96/24 and 192/24, and I have seen DTS 96/24, but sometimes I see DTS 96/24 but no DAC 96/24, shouldn't a receiver capable of DTS 96/24 be able to decode PCM audio at 96/24? Also it seems that sony does not support DAC at all??? Is this because they want to push SACD? Whey you get a receiver are you stuck with DAC for DVD-A only or SACD only depending on the manufacturer? Am I confusing something here?? 3) What are my choices for receivers/brands if I want something that will have Dolby Digital/DTS (5.1, 6.1, or 7.1), and support for DVD-A (either 96/24 or 192/24) when it comes out (I also need component switching at at least 50MHz for HDTV 1080i). And what do people recommend. I've been looking at the SONY STR-DE995, but I'm concerned that it will not support DVD-A. |
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