PATENT CLAIM ANALYSIS

Application Number: 16211563
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-04
Patent Classification: ["381", "099000"]

Abstract:
The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+rΩ 0  is generated on the basis of existing components at Ω and Ω+Ω 0 . The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank, a subband processing unit configurable by control data and a synthesis filter bank.

Claim (Index 4):
A method for generating a time stretched and/or frequency transposed signal from an input signal, the method comprising:\n deriving a number Y\u22652 of analysis subband signals from the input signal, wherein each analysis subband signal comprises a plurality of complex-valued analysis samples, each having a phase and a magnitude; forming Y frames of L input samples, each frame being extracted from said plurality of complex-valued analysis samples in an analysis subband signal and the frame length being L>1; applying a block hop size of h samples to said plurality of analysis samples, prior to deriving a subsequent frame of L input samples, thereby generating a sequence of frames of input samples; generating, on the basis of Y corresponding frames of input samples, a frame of processed samples by determining a phase and a magnitude for each processed sample of the frame, wherein, for at least one processed sample:\n i) the phase of the processed sample is based on the respective phases of the corresponding input sample in each of the Y frames of input samples; and \n ii) the magnitude of the processed sample is determined as a mean value of the magnitude of the corresponding input sample in a first frame of the Y frames of input samples and the magnitude of the corresponding input sample in a second frame of the Y frames of input samples; \n determining the synthesis subband signal by applying a window function of a length which corresponds to the frame length L to the frame of processed samples, and overlapping and adding the samples of a sequence of windowed frames of processed samples; and \n generating the time stretched and/or frequency transposed signal from the synthesis subband signal.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 98.0
- Lexical Diversity: 1.5
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13822601', '14854498', '15904702', '15480859', '13514896']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7493920229782676
- 35 USC 102 Novelty (BERT): 0.573390060381605
- Combined Prediction Score: 0.7317918267186014
- Mean Citation Score: 452.399772
- Max Citation Score: 461.1443
- Similarity Product: 450.1340409355879

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

Dataset: test