Skip to main content

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: Intensity Stereo (Read 3177 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Intensity Stereo

Hi,

Does anyone actually have a good explanation of what intensity stereo is?

Ruairi
rc55.com - nothing going on

 

Intensity Stereo

Reply #1
Joint Stereo/JS

Joint stereo coding methods try to increase the coding efficiency when encoding stereo signals by exploiting commonalties between the left and right signal. There are two usual joint stereo coding algorithms, namely Mid-Side (MS) stereo coding and Intensity stereo coding. MS stereo applies a matrix to the left and right channel signals, computing sum and difference of the two original signals. Whenever a signal is concentrated in the middle of the stereo image, MS stereo can achieve a significant saving in bitrate. Even more important is the fact that by applying the inverse matrix in the decoder the quantization noise becomes correlated and falls in the middle of the stereo image where it is masked by the signal.
Intensity stereo coding is a method that achieves a saving in bitrate by replacing the left and the right signal by a single representing signal plus directional information. This replacement is psychoacoustically justified in the higher frequency range since the human auditory system is insensitive to the signal phase at frequencies above approximately 2kHz.
Intensity stereo is by definition a lossy coding method thus it is primarily useful at low bitrates. For coding at higher bitrates only MS stereo should be used.


Text © Menno Bakker - Audiocoding.com

 
SimplePortal 1.0.0 RC1 © 2008-2021