Pcm 5.1 - High-Def Digest Forums
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Old 05-23-2007, 09:03 AM
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Default Pcm 5.1

Can somewhat explain to me in English and in detail exactly what PCM 5.1 is? Also, if I use this receiver, the Onkyo TX-SR805, it has HDMIv1.3 inputs and decodes DolbyDigital Plus, True HD, and DTS-HD, and I have a Blue Ray player with HDMIv1.3 will this receiver decode PCM 5.1 with the HDMI cable?

Last edited by cardpetree; 05-23-2007 at 09:04 AM. Reason: changed title
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Old 05-23-2007, 10:24 AM
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PCM doesn't really require decoding. It's uncompressed, lossless sound, and is essentially the same soundtrack you'd get in the theaters. Any Blu-ray player will output PCM over any version of HDMI.

HDMI 1.3 (or more accurately 1.3a) would let you output the bitstream to the Onkyo to decode. I don't know of any current players that have this ability, though, so at this point I'd set player's audio output to "PCM", and let the player do the decoding. The PS3, Samsung BDP1200, and Panasonic players can all currently decode DD+, TrueHD, and DTS-HD, and the upcoming Pioneer will do the same. No current players can decode full DTS-HD Master Audio yet.
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Old 05-23-2007, 11:20 AM
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Quote:
Originally Posted by zombieflanders View Post
I don't know of any current players that have this ability
I think this receiver does, the Onkyo TX-SR805 it's coming very soon. I would give you a direct link to check it out, but the site won't let me because I haven't had 10 post yet. Go to us.onkyo.com and check out the receivers obviously. Let me know what you think, because I'm pretty sure I want to buy it as soon as it's available.
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Old 05-23-2007, 02:56 PM
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It's not the receiver's problem receiving the advanced audio codecs, it is the player's inability to output the bitstream of said codecs.
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Old 05-23-2007, 07:55 PM
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Quote:
Originally Posted by zombieflanders View Post
PCM doesn't really require decoding. It's uncompressed, lossless sound, and is essentially the same soundtrack you'd get in the theaters. Any Blu-ray player will output PCM over any version of HDMI.
Actually, Movie theaters use compressed forms of DTS (2.2 Mbps), Dolby Digital (320kbps) or SDDS (2.2 Mbps) for surround sound. These formats are higher bitrate than DVDs but are still lossy. The only time you would get PCM in a movie theater is with 2 channel stereo sound.
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