PATENT CLAIM ANALYSIS

Application Number: 16377661
Application Type: Utility
Filing Date: 2019-04
Publication Date: 2019-09
Patent Classification: ["381", "002000"]

Abstract:
When compressing an HOA data frame representation, a gain control ( 15, 151 ) is applied for each channel signal before it is perceptually encoded ( 16 ). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number (β e ) of bits the HOA data frame representation (C(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalisation of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to β e =┌ log 2 (┌ log 2 (√{square root over (K MAX )}·O)┐+1)┐.

Claim (Index 1):
A method of decoding a compressed Higher Order Ambisonics (HOA) sound representation of a sound or sound field, the method comprising:\n receiving a bit stream containing the compressed HOA representation and decoding the compressed HOA representation to determine perceptually decoded signals {circumflex over (z)} i (k), i=1, . . . , I, associated gain correction exponent e i (k) and gain correction exception flag \u03b2 i (k); re-distributing gain corrected signal frames \u0177 i (k), i=1, . . . , I, during channel reassignment, in order to reconstruct a frame {circumflex over (X)} PS (k) of predominant sound signals and a frame C I,AMB (k) of an intermediate representation of an ambient HOA component, wherein a lowest integer number \u03b2 e  of bits applied to a signal of a transport channel in a previous frame is based on\n \u03b2 e =\u250c log 2 (\u250c log 2 (\u221a{square root over ( K MAX )}\u00b7 O )\u2510+1)\u2510, \n \n wherein K MAX =max 1\u2264N\u2264N MAX K(N, \u03a9 1 (N) , . . . , \u03a9 O (N) ), N is the order, N MAX  is a maximum order of interest, \u03a9 1 (N) , . . . , \u03a9 O (N)  are directions of said virtual loudspeakers, O=(N+1) 2  is the number of HOA coefficient sequences, and K is a ratio between the squared Euclidean norm \u2225\u03a8\u2225 2 2  of said mode matrix and O.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 100.0
- Lexical Diversity: 1.74468
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15702418', '16019288', '15319699', '15319707', '15891066']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7777584669755228
- 35 USC 102 Novelty (BERT): 0.5529920920228464
- Combined Prediction Score: 0.7552818294802551
- Mean Citation Score: 405.528608
- Max Citation Score: 414.73508
- Similarity Product: 405.0973907010268

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