Table of Contents
Advertisement
APTO™ Processing
Dialog Normalization
The Dialog Normalization control (10-1H) enables dialog detection and measurement. When enabled, APTO's
Compliance processing stage uses long-term speech-only measurements rather than the overall input program
loudness to ensure the output target level is achieved.
The use of dialog-based measurement is normally determined by regional regulations. For example, ATSC A/85
relies upon anchor-based normalization, specifically dialog, while EBU R128 recommends the use of overall
measurements. This is reflected in their respective factory profiles.
Average Hold
When the Average Hold control (10-1I) is enabled and the output audio of the Dynamic Range processing
stage falls below the level set in the Average Hold Threshold control (located in the Advanced menu), APTO's
Compliance stage of processing becomes inactive until the level once again rises above the threshold. This helps
prevent noise and low-level background audio from being increased unnecessarily.
Figure 10-1 – Basic APTO controls
Chapter 10 | 58
Advertisement
Table of Contents
