I haven't jumped into the Hi-Def race yet but love to catch the in store demos.

Ironically I was at a demo in Best Buy where they were playing HOUSE OF FLYING DAGGERS and while I won't say the video was that great, the audio--- OMG!!! Now that was incredible the realism!!

I've have DVD-Audio so i'm familiar with uncompressed multi-channel with music only but this was incredible!!

Anyone know what the bit resolution rate is on that one?

LPCM 5.1 4608Kbps 16-bit/48kHz.

I was really impressed with LPCM 5.1 as well the first time I heard it... it's absolutely amazing!

For LPCM, is it supposed to fluctuate the bitrate? PowerDVD shows a constant bitrate for LPCM. For DD TrueHD, DTS-HD it fluctuates the bitrate.

My first taste of PCM was with my PS3 on Monday, Pearl Harbour :D :D :D , awesome stuff.
But seeing as you auditioned this at BB I doubt it actually was connected properly for PCM, was probably just DD over toslink. Still quite good on that movie I would guess.

For LPCM, is it supposed to fluctuate the bitrate? PowerDVD shows a constant bitrate for LPCM. For DD TrueHD, DTS-HD it fluctuates the bitrate.

I believe it is supposed to stay constant because it is uncompressed... which is why PCM tracks take so much space... even in silence they are still taking up a lot of space. But that is just the way I think it is... somebody correct me if I am wrong :\.

Also... if you want a SWEET sounding PCM track... WATCH REIGN OF FIRE NOW... that movie sounds AWESOME!

My first taste of PCM was with my PS3 on Monday, Pearl Harbour :D :D :D , awesome stuff.
But seeing as you auditioned this at BB I doubt it actually was connected properly for PCM, was probably just DD over toslink. Still quite good on that movie I would guess.

According to the receiver it was playing through it said HDMI.

I believe it is supposed to stay constant because it is uncompressed... which is why PCM tracks take so much space... even in silence they are still taking up a lot of space. But that is just the way I think it is... somebody correct me if I am wrong :\.
That is the way I understood it to be as well.

So is LPCM lossless or no?

So is LPCM lossless or no?

Lossless and uncompressed

According to the receiver it was playing through it said HDMI.

Nice! Most I have seen connected for demo, at BB/FS, are component/toslink. Good to hear some of the stores do it right.

My first taste of LPCM was Silent Hill on the Sammy. Although the PQ left something to be desired, I was blown away by the audio.

My first taste of LPCM was Silent Hill on the Sammy. Although the PQ left something to be desired, I was blown away by the audio.

The siren = mass amounts of awesomeness.

The siren = mass amounts of awesomeness.

Heck yeah! I replayed that part at least 6 times :D

My first taste of LPCM was Silent Hill on the Sammy. Although the PQ left something to be desired, I was blown away by the audio.

I don't have this on BD yet, but on the DVD I remember jumping out of my seat when the jeep crashed through the gate at the beginning of the movie. Gotta hear that on PCM.

The bitrate should be constant. I've always preferred constant bitrate audo.

I just thought that lossless audio would fluctuate the bitrate. But if not, that's just fine :)

Black.Hawk.Down.

:eek:


I thought I liked Blu-ray before... then I got my Denon and some speakers worthy of it...


:D :D :D


HD nirvana!

I just thought that lossless audio would fluctuate the bitrate. But if not, that's just fine :)
Technically, LPCM isn't actually a lossless codec because it isn't compressed to begin with. A lossless audio codec is something that compresses the audio into a smaller file that sounds just as good as an equivalent PCM track. In short, PCM is what a lossless codec imitates.

Thanks for the info :)

Underworld Evolution was the first lossless disc I played when I received my new receiver a couple of weeks ago. BHD, Crank and Superman Returns (HD DVD) sound amazing as well.

I'm VERY excited for Casino Royale!

There is absolutely no reason for Sony not to make Casino Royale their first 24 bit PCM track. It's a BD50 with AVC compression for godsake!

Dan

I was really impressed with LPCM 5.1 as well the first time I heard it... it's absolutely amazing!

LPCM is a direct uncompressed pulse coded digitization of the audio. According to the Sampling Theory, this must be done at a fixed repition rate, equal to at least twice the highest frequency in the analogue signal. For music, the bandwidth is 20,000 Hz or less, so it requires at least a 40,000Hz sampling rate to be faithfully digitized and reproduced. Here, the rep rate is set at 48,000 Hz. This is 1.2 times the minimum demanded by the Sampling theorem. Good. There can be no fluctuation in this, the analogue to Digital converter must run at this fixed frequency, taking a sample of the audio once every (1/48000) seconds. That's 20 microseconds. When you quantize analogue data in this way, the original signal is easily obtained by merely passing the digtial data to a fast Digital to Analogue Converter running at the same rate. The reconstructed analogue signal is a perfect replica, with, perhaps a tiny amount of quantization noise. with 16 bit samples, this Q noise is (2^-16) relative to the normalized signal. So on a DB scale this LPCM channel produces a Signal to noise ration 0f 20LOG(2^16) =96 DB.
Now for N channels, clearly, these A/D conversions must be N times faster, so that each channel can be revisited and sampled at the appropriate time. This should help to remove some of the mystery from at least one of these very advanced concepts we often wave our hands at here.

I equate my first experience with PCM with my first experience with dolby digital 5.1.

That was The Matrix. I kept replaying bullet time when the bullets shot past my head over either shoulder.

Then I watched Twister and I remember feeling like I was inside the tornado. Man I hope these come out soon.