Welcome Guest ( Log In | Register )

First perceptual lossy codec?
post Dec 29 2012, 02:15
Post #1

Group: Members
Posts: 143
Joined: 14-December 12
Member No.: 105171

Just out of curiosity and interest in history, what was the first lossy compression method that was based upon perceptual/psychoacoustic principles (= not waveform prediction like ADPCM or companding like u-law or NICAM)? Was it MP1, ATRAC or were there codecs like that before?
Go to the top of the page
+Quote Post
Start new topic
Replies (1 - 1)
post Dec 29 2012, 14:35
Post #2

Group: Developer
Posts: 694
Joined: 6-December 08
From: Erlangen Germany
Member No.: 64012

In the scientific literature, the earliest experiments I can recall are by Atal and Schroeder, based on linear predictive coding (LPC):

Predictive Coding of Speech Signals and Subjective Error Criteria (IEEE Trans. ASSP, 1979. Conference paper is from 1978)

For music, developments started only in the mid 80s, I think. There's a paper by Johnston (Woodinville or JJ here on HA):

Transform Coding of Audio Signals Using Perceptual Noise Criteria (IEEE Journal Sel. Areas in Comm., 1988. Paper manuscript is from 1987)

So yes, MPEG 1 Layer 1 with a perceptual encoder according to JJ's paper is what I consider the first perceptual codec. There might also be a CELP speech codec from that time with the Atal/Schroeder perceptual model.


This post has been edited by C.R.Helmrich: Dec 29 2012, 14:44

If I don't reply to your reply, it means I agree with you.
Go to the top of the page
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:


RSS Lo-Fi Version Time is now: 25th December 2014 - 17:32