PATENT CLAIM ANALYSIS

Application Number: 15876404
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-06
Patent Classification: ["381", "022000"]

Abstract:
Decoding of Ambisonics representations for a stereo loudspeaker setup is known for first-order Ambisonics audio signals. But such first-order Ambisonics approaches have either high negative side lobes or poor localisation in the frontal region. The invention deals with the processing for stereo decoders for higher-order Ambisonics HOA. The desired panning functions can be derived from a panning law for placement of virtual sources between the loudspeakers. For each loudspeaker a desired panning function for all possible input directions at sampling points is defined. The panning functions are approximated by circular harmonic functions, and with increasing Ambisonics order the desired panning functions are matched with decreasing error. For the frontal region between the loudspeakers, a panning law like the tangent law or vector base amplitude panning (VBAP) are used. For the rear directions panning functions with a slight attenuation of sounds from these directions are defined.

Claim (Index 2):
An apparatus for determining a decoding matrix D for decoding stereo loudspeaker signals from a higher-order Ambisonics audio signal, said apparatus comprising:\n means for determining the order N of the Ambisonics audio signal; means for determining based on azimuth angle values of loudspeakers and a number S of virtual sampling points on a sphere, a matrix G containing desired panning function values for all virtual sampling points; means for determining a matrix \u039e +  based on the number S and the order N; means for determining from said matrices G and \u039e +  a decoding matrix D.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 86.0
- Lexical Diversity: 1.76404
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15479108', '14386784', '15681793', '15245061', '15676843']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.741372270233907
- 35 USC 102 Novelty (BERT): 0.5634730252967052
- Combined Prediction Score: 0.7235823457401869
- Mean Citation Score: 368.940944
- Max Citation Score: 444.41516
- Similarity Product: 408.4498885013032

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