PATENT CLAIM ANALYSIS

Application Number: 16268448
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-06
Patent Classification: ["704", "500000"]

Abstract:
According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal. The method further includes generating a noise component based on a noise parameter. Finally, the method includes adjusting a phase of the high-frequency reconstructed signal and obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal to obtain a time-domain reconstructed audio signal.

Claim (Index 1):
A method for generating a reconstructed audio signal having a baseband portion and a highband portion, the method comprising:\n deformatting an encoded audio signal into a first part and a second part; extracting, from the first part, temporal envelope information;\n extracting, from the first part, spectral components of the baseband portion, wherein the spectral components of the baseband portion do not include spectral components of the highband portion and the number of the spectral components of the baseband portion may vary dynamically; \n decoding the first part to obtain a decoded baseband audio signal, wherein the decoding includes filtering in a frequency domain at least some of the spectral components of the baseband portion based on the temporal envelope information to shape a temporal envelope of the baseband portion; \n extracting, from the second part, a noise parameter and an estimated spectral envelope of the highband portion;\n obtaining a plurality of subband signals by filtering the decoded baseband audio signal, wherein the plurality of subband signals are generated with one or more Quadrature Mirror Filters (QMF); \n generating a high-frequency reconstructed signal by copying in a circular manner a number of consecutive subband signals of the plurality of subband signals; \n obtaining an envelope adjusted high-frequency signal by adjusting, based on the estimated spectral envelope of the highband portion, a spectral envelope of the high-frequency reconstructed signal, wherein a frequency resolution of the estimated spectral envelope is adaptive, and wherein the obtaining the envelope adjusted high-frequency signal includes determining and applying a gain;\n generating a noise component based on the noise parameter, wherein the noise parameter indicates a level of noise contained in the highband portion; \n obtaining a combined high-frequency signal by adding the noise component to the envelope adjusted high-frequency signal; and \n obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal; wherein the method is implemented by an audio decoding device comprising one or more hardware elements.

Metadata:
- Claim Count in Document: 6.0
- Percentile: 99.0
- Lexical Diversity: 2.58182
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15702451', '15921859', '15258415', '15203528', '15425827']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3701238776886069
- 35 USC 102 Novelty (BERT): 0.6509748278746174
- Combined Prediction Score: 0.398208972707208
- Mean Citation Score: 550.422646
- Max Citation Score: 561.16254
- Similarity Product: 557.958900726285

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