PATENT CLAIM ANALYSIS

Application Number: 15761694
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-12
Patent Classification: ["455", "570000"]

Abstract:
An echo time delay detection method, an echo elimination device, and terminal equipment are provided. The echo time delay detection method includes: obtaining an audio signal transmitted through air and acquired by an audio input device of terminal equipment when detecting a call access request, the audio signal corresponding to an audio output by an audio output device of the terminal equipment; converting the audio signal to obtain a signal to be processed; determining a reference signal corresponding to the audio signal; and determining an echo time delay value according to the reference signal and the signal to be processed.

Claim (Index 5):
The echo time delay detection method according to  claim 1 , wherein the reference signal has a plurality of frames, and the signal to be processed has a plurality of frames, and\n wherein the determining the first echo time delay value comprises: determining a binary array of each frame of the reference signal and a binary array of each frame of the signal to be processed, wherein the binary array of each frame of the reference signal comprises binary values of all frequency bins of the frame of the reference signal and the binary array of each frame of the signal to be processed comprises binary values of all frequency bins of the frame of the signal to be processed; performing XOR accumulation processing on binary arrays of a same frame of the reference signal and the signal to be processed, to obtain an XOR accumulation processing result of each frame; selecting a process result that meets a set condition from XOR accumulation processing results of all frames of the reference signal and the signal to be processed, determining a time delay value corresponding to a frame number corresponding to the selected processing result, and determining the time delay value as a candidate time delay value; and determining the candidate time delay value as the first echo time delay value in response to the candidate time delay value meeting a set convergence condition.

Metadata:
- Claim Count in Document: 19.0
- Percentile: 90.0
- Lexical Diversity: 2.27083
- Patent Class: 455.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14060141', '14400289', '15651757', '13933005', '15341520']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7031434395191906
- 35 USC 102 Novelty (BERT): 0.4771808307603435
- Combined Prediction Score: 0.6805471786433058
- Mean Citation Score: 165.783996
- Max Citation Score: 169.41493
- Similarity Product: 122.72802996571124

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