AES E-Library

Envelope-Based Spatial Parameter Estimation in Directional Audio Coding

Directional Audio Coding provides an efficient description of spatial sound in terms of few audio downmix signals and parametric side information, namely the direction-of-arrival (DOA) and diffuseness of the sound. This representation allows an accurate reproduction of the recorded spatial sound with almost arbitrary loudspeaker setups. The DOA information can be efficiently estimated with linear microphone arrays by considering the phase information between the sensors. Due to the microphone spacing, the DOA estimates are corrupted by spatial aliasing at higher frequencies affecting the sound reproduction quality. In this paper we propose to consider the signal envelope for estimating the DOA at higher frequencies to avoid the spatial aliasing problem. Experimental results show that the presented approach has great potential in improving the estimation accuracy and rendering quality.

Authors: Kratschmer, Michael; Thiergart, Oliver; Pulkki, Ville
Affiliations: Fraunhofer Institute for Integrated Circuits IIS, Erlangen, Germany; International Audio Laboratories Erlangen, Erlangen, Germany; Aalto University, Espoo, Finland(See document for exact affiliation information.)
AES Convention:133 (October 2012) Paper Number:8791 Import into BibTeX
Subject:Analysis and Synthesis of Sound

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 133Papers)   /conv/133/8791.pdf

Start a discussion about this paper!