PATENT CLAIM ANALYSIS

Application Number: 15989618
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["704", "203000"]

Abstract:
A frame error concealment method based on frames including transform coefficient vectors including the following steps: It tracks sign changes between corresponding transform coefficients of predetermined sub-vectors of consecutive good stationary frames. It accumulates the number of sign changes in corresponding sub-vectors of a predetermined number of consecutive good stationary frames. It reconstructs an erroneous frame with the latest good stationary frame, but with reversed signs of transform coefficients in sub-vectors having an accumulated number of sign changes that exceeds a predetermined threshold.

Claim (Index 13):
An audio frame loss concealment method for improving audio quality, the method being performed by a decoder and comprising:\n receiving a first audio frame, the first audio frame comprising a plurality of bands comprising a first band and a second band, each of the plurality of bands of the first audio frame comprising a plurality of transform coefficients; storing a first sign switch value that is associated with the first band of the first audio frame and that indicates a first number of transform coefficient sign switches; storing a second sign switch value that is associated with the second band of the first audio frame and that indicates a second number of transform coefficient sign switches; determining that a next audio frame immediately following the first audio frame is lost; and as a result of determining that the next audio frame is lost, constructing a replacement audio frame such that: the replacement audio frame comprises a plurality of bands comprising a first band and a second band, wherein the first band of the replacement audio frame corresponds to the first band of the first audio frame and the second band of the replacement audio frame corresponds to the second band of the first audio frame, the first band of the replacement audio frame comprises a plurality of transform coefficients, each of which corresponds to one of the transform coefficients included in the first band of the first audio frame, for each transform coefficient included in the first band of the replacement audio frame, the absolute value of the transform coefficient is identical to the absolute value of its corresponding transform coefficient included in the first band of the first audio frame, for each transform coefficient included in the first band of the replacement audio frame, the sign of the transform coefficient is determined based on the first sign switch value, the second band of the replacement audio frame comprises a plurality of transform coefficients, each of which corresponds to one of the transform coefficients included in the second band of the first audio frame, for each transform coefficient included in the second band of the replacement audio frame, the absolute value of the transform coefficient is identical to the absolute value of its corresponding transform coefficient included in the second band of the first audio frame, and for each transform coefficient included in the second band of the replacement audio frame, the sign of the transform coefficient is determined based on the second sign switch value.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 93.0
- Lexical Diversity: 1.83333
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15271930', '14767499', '14427778', '14977207', '15844004']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2273082139026025
- 35 USC 102 Novelty (BERT): 0.515877544986498
- Combined Prediction Score: 0.2561651470109921
- Mean Citation Score: 217.358276
- Max Citation Score: 323.74716
- Similarity Product: 313.73933922359697

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