{"id":4334,"date":"2019-06-14T01:46:29","date_gmt":"2019-06-13T23:46:29","guid":{"rendered":"https:\/\/demdlx704as001.ad.harman.com\/?p=4334"},"modified":"2020-10-14T15:12:36","modified_gmt":"2020-10-14T13:12:36","slug":"automatic-level-adaptation-ala","status":"publish","type":"post","link":"https:\/\/audioworx.transfunnel.co\/old\/?p=4334","title":{"rendered":"Automatic Level Adaptation (ALA)"},"content":{"rendered":"

The goal of the ALA is to support the VNC operation by slightly boosting weak signals. This also helps in
\ncompensating the level difference of the input signal from CD and radio. Normally, the radio signal is much
\nweaker than the CD input level, so when users switch between them, there is an audible difference. For this
\nreason, the ALA in needed.<\/p>\n

The range of this adjustment is dictated by the current MNR, speed, volume and users’
\nVNC amount (user element). In the worst-case scenario, where the MNR is minimal and the VNC amount is
\nmaximal, the ALA should have maximum sensitivity to the input level. When the environment conditions start to
\nget better, meaning that the MNR is increasing, the ALA should become less sensitive to the input level. Users\u2018
\nVNC amount should also directly affect the ALA sensitivity.<\/p>\n

The ALA is meant to be applied to the Entertainment channels only. However, it should only react if there is a
\nchange in the defined parameters, evaluated at the loudest source and at MID range.<\/p>\n

The core of the ALA implementation is the Compander. Some parameters can be overwritten according to the
\nVNC level amount that users set, MNR, speed, and volume. For the remainder of this document, they will be
\nreferred to as DTP. The DTP are sent to the DSP from the Tuning Tool through
\nthe Global Parameters.<\/p>\n

The ALA consists of the following submodules:<\/p>\n