What is lossless audio? - Blu-ray Forum

Atreyu · 03-23-2010, 10:23 PM

There may have been an earlier thread devoted to this but I'm not sure.
What is Lossless/HD Master Audio? What are the differences and what makes it better than say Dolby 5.1?

Big Daddy · 03-23-2010, 10:32 PM

Read https://forum.blu-ray.com/audio-theo...io-codecs.html .

42041 · 03-23-2010, 11:08 PM

a CD is lossless (well, uncompressed)
an MP3 is lossy
perceptual codecs throw out audio information you ear is unlikely to hear, but it's not a perfect copy.

Big Daddy · 03-23-2010, 11:29 PM

Quote:

Originally Posted by 42041

a CD is lossless (well, uncompressed)
an MP3 is lossy
perceptual codecs throw out audio information you ear is unlikely to hear, but it's not a perfect copy.

Be careful about using the word "uncompressed". Compression is not the same thing as lossy and lossless. We can have lossy compression and lossless compression. Dolby Digital and DTS surround are examples of lossy compression and Dolby TrueHD and DTS-HD MA are examples of lossless compression. PCM (or LPCM) is lossless and uncompressed.

Atreyu · 03-24-2010, 12:04 AM

Thanks this info sure clears up alot for me I really appreciate it.

Damage Inc. · 03-24-2010, 01:12 AM

I think you could also roughly compare homevideo-audio to separate music-audio.
As in, DVD-quality would be like MP3-quality and BD-quality would be like CD-quality.
Except you of course have the different codecs, but quality-wise it's pretty similar.

03-23-2010, 10:23 PM	#1
Atreyu Blu-ray Knight Member since:Dec 2008 Location:North Carolina 4K collection:370 Blu-ray collection:1876 DVD collection:619 Digital collection:1 Blu-ray reviews: 293 Trading Score:4	What is lossless audio? There may have been an earlier thread devoted to this but I'm not sure. What is Lossless/HD Master Audio? What are the differences and what makes it better than say Dolby 5.1?

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03-23-2010, 10:32 PM	#2
Big Daddy Blu-ray Champion Top ranked HT gallery Member since:Jan 2008 Location:Southern California Home Theater Gallery:79 Blu-ray collection:122 Trading Score:1	Read https://forum.blu-ray.com/audio-theo...io-codecs.html .

03-23-2010, 11:08 PM	#3
42041 Blu-ray Ninja Member since:Oct 2008	a CD is lossless (well, uncompressed) an MP3 is lossy perceptual codecs throw out audio information you ear is unlikely to hear, but it's not a perfect copy.

03-24-2010, 12:04 AM	#5
Atreyu Blu-ray Knight Member since:Dec 2008 Location:North Carolina 4K collection:370 Blu-ray collection:1876 DVD collection:619 Digital collection:1 Blu-ray reviews: 293 Trading Score:4	Thanks this info sure clears up alot for me I really appreciate it.

03-24-2010, 01:12 AM	#6
Damage Inc. Blu-ray Guru Top contributor Member since:Jan 2009 Location:The Netherlands 4K collection:3 Blu-ray collection:384 DVD collection:5	I think you could also roughly compare homevideo-audio to separate music-audio. As in, DVD-quality would be like MP3-quality and BD-quality would be like CD-quality. Except you of course have the different codecs, but quality-wise it's pretty similar.

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