PATENT CLAIM ANALYSIS

Application Number: 15988135
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["704", "500000"]

Abstract:
The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computational complexity. This is accomplished by means of frequency translation or folding in the subband domain, preferably integrated with spectral envelope adjustment in the same domain. The concept of dissonance guard-band filtering is further presented. The proposed invention offers a low-complexity, intermediate quality HFR method useful in speech and natural audio coding applications.

Claim (Index 7):
A method for reconstructing a high frequency portion of an audio signal, the method comprising:\n filtering a low frequency portion of the audio signal with a complex exponential modulated analysis filterbank to produce a plurality of low frequency complex-valued subband signals, wherein the filtering includes decimating the plurality of low frequency subband signals; reconstructing the high frequency portion of the audio signal by patching both a real and an imaginary part of a consecutive number of the plurality of low frequency complex-valued subband signals to consecutive subbands of the high frequency portion; and generating a wideband audio signal with a complex exponential modulated synthesis filterbank by combining the reconstructed high frequency portion of the audio signal with the low frequency portion of the audio signal, wherein the generating includes interpolating the plurality of low frequency subband signals.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 93.0
- Lexical Diversity: 1.50725
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15677454', '15446553', '15446535', '15446524', '15446562']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3445284187760872
- 35 USC 102 Novelty (BERT): 0.5981795742073169
- Combined Prediction Score: 0.3698935343192102
- Mean Citation Score: 478.4055139999999
- Max Citation Score: 498.73273
- Similarity Product: 484.94586226724994

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