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Convention Paper

Intelligent Program Loudness Measurement and Control: What Satisfies Listeners?

Authors: Robinson, Charles; Lyman, Steve; Riedmiller, Jeffrey C.

AES Convention 115 · Paper 5900 · October 2003

Abstract

The broadcast, satellite and cable television industries have been plagued for years by the inability of personnel to accurately interpret and thus consistently control program loudness utilizing traditional measurement devices and methods. As a result, most listeners feel compelled to make adjustments to their television volume controls (in the home). A recent survey of channel-to-channel and/or program-to-program level discrepancies and subjective listening tests confirms that current the practice is unacceptable to listeners. In this paper we describe loudness measurement techniques that improve accuracy, usability, and consistency relative to previous techniques. Accuracy in this application is determined by correlation to listener opinion, with the particular goal of minimizing annoyance resulting from level mismatch. Usability is improved by minimizing the interaction required by the user. Consistency is achieved by minimizing the amount of meter interpretation required. The keys to this method are: providing a single numeric indication of loudness for a given program or segment; and isolating and measuring the portions of the program that are primarily speech, and using speech loudness as the basis for overall program level thereby improving listener satisfaction.

Details

Published in
AES Convention 115
AES Convention
115
Paper number
5900
Publication date
October 6, 2003
Session subject
Instrumentation and Measurement
Affiliation
Dolby Laboratories Inc. San Francisco, CA (See document for exact affiliation information.)
Type
Convention Paper