Method and apparatus for generating from a multi-channel 2D audio input signal a 3D sound representation signal

US10341802B2 · kind B2 · utility

Assignee

• Dolby Laboratories Licensing Corporation · US

Inventors

• Alexander Krueger · Burgdorf, DE
• Johannes Boehm · Göttingen, DE
• Sven Kordon · Wunstorf, DE
• Xiaoming Chen · Xi'an, CN
• Stefan Abeling · Winsen (Aller), DE
• Florian Keiler · Hannover, DE
• Holger Kropp · Großburgwedel, DE

Key dates

• Filing date: Nov 11, 2016
• Grant date: Jul 2, 2019
• Expiry date: Nov 11, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04S2420/11
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Currently there is no simple and satisfying way to create 3D audio from existing 2D content. The conversion from 2D to 3D sound should spatially redistribute the sound from existing channels. From a multi-channel 2D audio input signal (x(k)(t)) a 3D sound representation is generated which includes an HOA representation Formula (I) and channel object signals Formula (II) scaled from channels of the 2D audio input signal. Additional signals Formula (III) placed in the 3D space are generated by scaling (21, 222; 41, 422; Formula (IV)) channels from the 2D audio input signal and by decorrelating (24, 25; 44, 45, 451; Formula (V)) a scaled version of a mix of channels from the 2D audio input signal, whereby spatial positions for the additional signals are predetermined. The additional signals Formula (III) are converted (27; 47) to a HOA representation Formula (I).