Sound field playback space decoding method based on sparse plane wave decomposition

• Main Authors: ZENG XIANGYANG, LU DONGDONG, DU BOKAI, HONG XI
• Format: Patent
• Language: Chinese; English
• Published: 19.08.2022
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS; STEREOPHONIC SYSTEMS

The invention belongs to the technical field of space sound field playback, and particularly relates to a high-order Ambisonics sound field playback space decoding method based on sparse plane wave decomposition. According to the method, sound field replay is realized through two stages, in the first stage, a driving function of a loudspeaker system for replaying plane waves in different directions is obtained in advance, and the first stage is called as a pre-calculation stage; and in the second stage, sparse plane wave decomposition is performed on the target sound field to calculate a playback driving function, which is called as a playback decoding stage. According to the method, the sound field is replayed by using the spherical harmonic domain sparse plane wave decomposition method, and the sound field replaying precision is effectively improved under the condition that the target sound field is generated by a small number of sound sources. The method is simple and convenient, the cost is low, and highe