PATENT CLAIM ANALYSIS

Application Number: 16158500
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-02
Patent Classification: ["381", "098000"]

Abstract:
The present technique relates to a frequency band extension apparatus, a frequency band extension method, and a program which are configured to more easily obtain a high quality sound signal. An input signal may be divided into sub-band signals of a plurality of sub-bands, powers of high frequency sub-bands of the input signal may be estimated based on feature values extracted from the input signal to obtain high frequency sub-band power estimation values, the high frequency sub-band powers obtained from the sub-band signals of high-frequency sub-bands of the input signal may be compared with the high frequency sub-band power estimation values, and a high-frequency signal of the input signal may be generated based on a result of the comparison and the sub-band signals.

Claim (Index 1):
A frequency band extension apparatus comprising:\n a signal dividing unit configured to divide an input signal, having a predetermined bandwidth, into a plurality of sub-band signals of a plurality of sub-bands within the predetermined bandwidth; a feature value calculation unit configured to calculate, for each of the plurality of sub-bands, a low frequency sub-band power of the input signal as a feature value; a high frequency sub-band power estimation unit configured to estimate, for each high frequency sub-band of the plurality of sub-bands, a power of a high frequency sub-band of the input signal based on the feature values to obtain high frequency sub-band power estimation values; a comparison unit configured to compare, for each of the high frequency sub-bands, a respective high frequency sub-band power and a respective high-frequency sub-band power estimation value associated with a respective high frequency sub-band; and a high-frequency signal generation unit configured to generate a high-frequency signal of the input signal, for each of the high frequency sub-bands, using the respective high frequency sub-band power when a result of the comparison indicates that the respective high frequency sub-band power is larger than the respective high-frequency sub-band power estimation value or using the respective high-frequency sub-band power estimation value when the result of the comparison indicates that the respective high-frequency sub-band power estimation value is larger than the respective high frequency sub-band power, wherein the signal dividing unit, the feature value calculation unit, the high frequency sub-band power estimation unit, the comparison unit, and the high-frequency signal generation unit are each implemented via at least one processor.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 97.0
- Lexical Diversity: 2.40741
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14412037', '13640500', '13639338', '13499559', '14870268']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7409037031985152
- 35 USC 102 Novelty (BERT): 0.5386873571138474
- Combined Prediction Score: 0.7206820685900484
- Mean Citation Score: 306.6825540000001
- Max Citation Score: 385.9859
- Similarity Product: 377.8418565085649

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