PATENT CLAIM ANALYSIS

Application Number: 15761895
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["381", "022000"]

Abstract:
A method and system are implemented in a stereo sound signal encoding system for time domain down mixing right and left channels of an input stereo sound signal into primary and secondary channels. Correlation of the primary and secondary channels of previous frames is determined, and an out-of-phase condition of the left and right channels is detected based on the correlation of the primary and secondary channels of the previous frames. The left and right channels are time domain down mixed, as a function of the detection, to produce the primary and secondary channels using a factor β, wherein the factor β determines respective contributions of the left and right channels upon production of the primary and secondary channels.

Claim (Index 4):
A time domain down mixing method as defined in  claim 1 , wherein:\n the correlation of the primary and secondary channels is an open loop correlation and detecting the out-of-phase condition comprises:\n (a) calculating in the frames an energy difference between side and mono signals determined from the left and right channels, and (b) calculating a long term energy difference between the side and mono signals using the calculated energy differences; \n calculating a pitch open loop maximum correlation of the primary channel of a previous frame; and \n calculating a pitch open loop maximum correlation of the secondary channel of the previous frame; \n wherein the out-of-phase condition is detected when (a) the long term energy difference is above a given threshold, and (b) the pitch open loop maximum correlations are located within a predetermined range.

Metadata:
- Claim Count in Document: 101.0
- Percentile: 90.0
- Lexical Diversity: 2.25
- Patent Class: 381.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15761868', '15761858', '15761900', '14460074', '12811419']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7096348103230119
- 35 USC 102 Novelty (BERT): 0.5801689883081632
- Combined Prediction Score: 0.696688228121527
- Mean Citation Score: 338.348224
- Max Citation Score: 485.60724000000016
- Similarity Product: 384.5741004935933

Labels:
- Claim Label 101: 0
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 0

Dataset: test