PATENT CLAIM ANALYSIS

Application Number: 16114937
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2018-12
Patent Classification: ["381", "001000"]

Abstract:
The invention discloses rendering sound field signals, such as Higher-Order Ambisonics (HOA), for arbitrary loudspeaker setups, where the rendering results in highly improved localization properties and is energy preserving. This is obtained by a new type of decode matrix for sound field data, and a new way to obtain the decode matrix. In a method for rendering an audio sound field representation for arbitrary spatial loudspeaker setups, the decode matrix (D) for the rendering to a given arrangement of target loudspeakers is obtained by steps of obtaining a number (L) of target speakers, their positions ( L ), positions ( S ) of a spherical modeling grid and a HOA order (N), generating ( 141 ) a mix matrix (G) from the positions ( S ) of the modeling grid and the positions ( L ) of the speakers, generating ( 142 ) a mode matrix ({tilde over (Ψ)}) from the positions ( S ) of the spherical modeling grid and the HOA order, calculating ( 143 ) a first decode matrix ({circumflex over (D)}) from the mix matrix (G) and the mode matrix ({tilde over (Ψ)}) and smoothing and scaling ( 144,145 ) the first decode matrix ({circumflex over (D)}) with smoothing and scaling coefficients.

Claim (Index 1):
A method for rendering a Higher-Order Ambisonics (HOA) representation of a sound or sound field for audio playback, comprising:\n determining a mix matrix G based on L speakers and positions of a spherical modelling grid related to a HOA order N; determining a mode matrix {tilde over (\u03a8)} based on the spherical modelling grid and the HOA order N; rendering coefficients of the HOA sound field representation from a frequency domain to a spatial domain based on a smoothed decode matrix {tilde over (D)}; and outputting a spatial signal W for loudspeaker reproduction, wherein the spatial signal W is determined based on the rendering of the coefficients of the HOA sound field representation,\n wherein a compact singular value decomposition of a product of the mode matrix {tilde over (\u03a8)} with a Hermitian transposed mix matrix G H  is determined based on USV H ={tilde over (\u03a8)}G H , \n wherein U,V are based on Unitary matrices and S is based on a diagonal matrix with singular value elements, and a first decode matrix {circumflex over (D)} is determined based on the matrices U,V based on {circumflex over (D)}=V\u015cU H , \n wherein \u015c is a truncated compact singular value decomposition matrix that is either an identity matrix or a modified diagonal matrix, the modified diagonal matrix being determined based on the diagonal matrix with singular value elements by replacing a singular value element that is larger or equal than a threshold by ones, and replacing a singular value element that is smaller than the threshold by zeros, and \n wherein a rendering matrix D is determined based on the smoothed decode matrix {tilde over (D)}.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 96.0
- Lexical Diversity: 2.83333
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15619935', '15920849', '14415561', '15676843', '15039887']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7655824710791054
- 35 USC 102 Novelty (BERT): 0.6530247303147991
- Combined Prediction Score: 0.7543266970026749
- Mean Citation Score: 497.758524
- Max Citation Score: 627.8742
- Similarity Product: 618.6937397702692

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test