Improvements to the matching projection decoding method for Ambisonic system with irregular loudspeaker layouts

Citation:

Ge Z, Wu X, Qu T. Improvements to the matching projection decoding method for Ambisonic system with irregular loudspeaker layouts, in international conference on acoustics speech and signal processing. Brighton, United Kingdom; 2019:121-125.

摘要:

The Ambisonic technique has been widely used for soundfield recording and reproduction recently. However, the basicAmbisonic decoding method will break down when the play-back loudspeakers distribute unevenly. Various methods havebeen proposed to solve this problem. This paper introducesseveral improvements to a recently proposed Ambisonic de-coding method, the matching projection method, for unevenloudspeaker layouts. The first improvement is energy preserv-ing; the second is introducing the “in-phase” weight, and thethird is introducing partial projection coefficients. To eval-uate the improved method, we compared it with the origi-nal one and the all-round Ambisonic decoding method witha 2-dimension unevenly arranged loudspeaker array. The re-sult shows our method greatly improves the original methodwhere the loudspeaker arranges very sparsely or densely.