PATENT CLAIM ANALYSIS

Application Number: 15985635
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["704", "500000"]

Abstract:
An encoding system ( 400 ) encodes an N-channel audio signal (X), wherein N≥3, as a single-channel downmix signal (Y) together with dry and wet upmix parameters ({tilde over (C)}, {tilde over (P)}). In a decoding system ( 200 ), a decorrelating section ( 101 ) outputs, based on the downmix signal, an (N−1)-channel decorrelated signal (Z); a dry upmix section ( 102 ) maps the downmix signal linearly in accordance with dry upmix coefficients (C) determined based on the dry upmix parameters; a wet upmix section ( 103 ) populates an intermediate matrix based on the wet upmix parameters and knowing that the intermediate matrix belongs to a predefined matrix class, obtains wet upmix coefficients (P) by multiplying the intermediate matrix by a predefined matrix, and maps the decorrelated signal linearly in accordance with the wet upmix coefficients; and a combining section ( 104 ) combines outputs from the upmix sections to obtain a reconstructed signal ({circumflex over (X)}) corresponding to the signal to be reconstructed.

Claim (Index 1):
A method for reconstructing an N-channel audio signal (X), wherein N\u22653, the method comprising:\n receiving a single-channel downmix signal (Y) together with associated dry and wet upmix parameters ({tilde over (C)}, {tilde over (P)}); computing a dry upmix signal as a linear mapping of the downmix signal, wherein a set of dry upmix coefficients (C) is applied to the downmix signal; generating an (N\u22121)-channel decorrelated signal (Z) based on the downmix signal; computing a wet upmix signal as a linear mapping of the decorrelated signal, wherein a set of wet upmix coefficients (P) is applied to the channels of the decorrelated signal; and combining the dry and wet upmix signals to obtain a multidimensional reconstructed signal ({circumflex over (X)}) corresponding to the N-channel audio signal to be reconstructed, wherein the method further comprises: determining the set of dry upmix coefficients based on the received dry upmix parameters; populating an intermediate matrix having more elements than the number of received wet upmix parameters, based on the received wet upmix parameters and knowing that the intermediate matrix belongs to a predefined matrix class; and obtaining the set of wet upmix coefficients by multiplying the intermediate matrix by a predefined matrix, wherein the set of wet upmix coefficients corresponds to the matrix resulting from the multiplication and includes more coefficients than the number of elements in the intermediate matrix.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 93.0
- Lexical Diversity: 2.64557
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15031130', '15521157', '15029023', '15522255', '14781232']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3000610854157637
- 35 USC 102 Novelty (BERT): 0.5587511368940551
- Combined Prediction Score: 0.3259300905635928
- Mean Citation Score: 354.370536
- Max Citation Score: 430.963
- Similarity Product: 403.6716567471624

Labels:
- Claim Label 101: 0
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 0

Dataset: test