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 11):
The echo time delay detection method according to  claim 5 , wherein the performing the XOR accumulation processing comprises:\n making i the frame number, wherein i is an integer in a range of 0 to n\u22121, and n is a total number of frames of the reference signal, and performing the XOR accumulation processing on the binary arrays of an i th  frame of the reference signal and an i th  frame of the signal to be processed according to a formula CoxrR \ue8a0 ( i ) = \u2211 j = m \ue89e \ue89e 1 m \ue89e \ue89e 2 \ue89e \ue89e [ Capb \ue8a0 ( j ) \ue89e \ue89e Xor \ue89e \ue89e Refbbur \ue8a0 ( i ) \ue89e ( j ) ] , wherein\n Capb(j) represents a binary value of a j th  frequency bin of the i th  frame of the signal to be processed, Refbbum(i)(j) represents a binary value of the j th  frequency bin of the i th  frame of the reference signal, CoxrR(i) represents an XOR accumulation processing result corresponding to the i th  frame, Xor represents XOR processing, j is an integer in a range of m1 to m2, m1 is obtained by rounding down a calculation result of (M*a)/(fs*c), m2 is obtained by rounding down a calculation result of (M*b)/(fs*c), a is a first set value, b is a second set value, c is a third set value, and fs is an acquisition frequency of the audio signal.

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): 0.7007085929150406
- 35 USC 102 Novelty (BERT): 0.4882675497931703
- Combined Prediction Score: 0.6794644886028536
- Mean Citation Score: 165.783996
- Max Citation Score: 169.41493
- Similarity Product: 110.77420703110576

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