Abstract
Compensated amplitude panning (CAP) is a spatial audio reproduction method for loudspeakers that takes the listener head orientation into account. It can produce stable images in any direction using only two loudspeakers. In its original form, CAP is inherently an object-based method, with each image produced separately. An exact and efficient method is presented here for dynamically decoding a first order Ambisonic encoding, which is equivalent to using CAP to separately reproduce the constituents of the encoding. Both the stereo and multichannel cases are considered.
Highlights
A MBISONIC encoding enables complex scenes to be represented and decoded efficiently using a fixed number of channels, and is used widely for 360◦ video, and other applications
The head tracking allows images to be produced in any 3D direction using as few as 2 loudspeakers, which is of great value in many practical applications
In this article a new reproduction method is derived that decodes Ambisonic input to produce loudspeaker outputs that are the same as those produced by Compensated Amplitude Panning (CAP) for individual plane wave images
Summary
A MBISONIC encoding enables complex scenes to be represented and decoded efficiently using a fixed number of channels, and is used widely for 360◦ video, and other applications. An extension to Stereo-CAP for near-field images has been made by matching the low frequency ILD (Inter-aural Level Difference) to that of a near source This is possible using complex panning gains realized with a 1st order filter [12]. For a plane wave arriving from a target image direction rI , there are, in general, a range of possible incident fields that produce the same ITD an ILD cues for the head model, and so the same image. It was shown [1] that this can be formulated as a vector condition, rA · (rI − rV ) = 0. A decoding method is derived that converts a channel-based Ambisonic signal directly to stereo loudspeaker signals, which are equivalent to those produced by summing stereo-CAP signals
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
