Audio Bitrates

[nitinblurayfan]

I recently checked the audio bitrates of Indian releases of various movies and I found the bitrates a little low.
For example -

Iron Man 2 - Avg 4.7 mbps during the action sequence at Stark Expo never crossing 5 mbps

SPider-man 3 - Avg 3.5 mbps during the Harry/Peter air battle never crossing 4.5 mbps

Casino Royale - Average bitrate of 2.4mbps never crossing 3.4mbps during any action sequence.



These are bitrates of US releases-

Captain America - Avg 5.7mbps during any action sequence sometimes touch 6.7mbps



Are the bitrates really low for Indian releases or am I over-reacting? How much difference is 1mbps going to make?

[Kryptonic]

Those bitrates are pretty average among most releases. 3-4 mbps is the norm.

[42041]

The bitrate of lossless audio has nothing to do with quality, aside from indicating the compressibility of the source.

[HD Goofnut]

Originally Posted by Kryptonic

Those bitrates are pretty average among most releases. 3-4 mbps is the norm.

Right, 3-6 is about normal. Sometimes you'll see 7 or 8 if it's a loud action scene.

[nitinblurayfan]

Originally Posted by HD Goofnut

Right, 3-6 is about normal. Sometimes you'll see 7 or 8 if it's a loud action scene.

I never really saw the bitrates go over 6mbps. But lossless is lossless right?There is no such thing as one country having higher quality lossless audio than the other, right? I was worried I was gonna have to buy my blu-rays again.

[sonyfanboy]

Like the above poster said 3-4 is the average. Sometimes the bitrate might be in the low end because its encoded in a 16 bit track as opposed to 24 bit. Captain America has larger bitrate because its a 7.1 surround.

[42041]

Originally Posted by nitinblurayfan

I never really saw the bitrates go over 6mbps. But lossless is lossless right?There is no such thing as one country having higher quality lossless audio than the other, right? I was worried I was gonna have to buy my blu-rays again.

I don't know much about Indian discs, but it's possible that a disc released by one distributor might have 24bit audio, another might have 16bit, etc...

[nitinblurayfan]

I'm actually worried about Avengers which someone told me has an average bitrate of 5.4 mbps(24bit). But as 42041 said, it doesn't determine the quality, only the compressibility, right?