Signal Tagging via Adaptive Windowing in Time-Variant Data

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Solution Overview

Problem

Current methods for identifying signals of interest in time-variant data, such as voice signals, face disruptions when interrupted and struggle to accurately tag signals amidst multiple signals, requiring pre-segmented data and multiple passes for accurate identification.

Innovation Solution

A system that converts time domain input signals to the frequency domain, uses a classifier to identify and tag signals of interest by collapsing non-relevant data, and employs a signal tagger to efficiently tag signals of interest in real-time without needing multiple passes through the data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional smoothing methods (moving averages, least squares, convolution) are used to identify signals of interest, then the signal is smoothed over time, but the system experiences disruptions when the signal is interrupted and cannot properly identify signals among multiple signals

Engineering Contradiction:
Improvesignal identification accuracyVSAvoidsystem stability during interruption
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The patent applies dynamics by making the smoothing window adaptive rather than fixed. The window dynamically adjusts its boundaries based on detected signal transitions and interruptions. When a signal interruption is detected, the window resets or adjusts to exclude the interruption period, maintaining smoothing accuracy without being disrupted by temporary signal gaps. This dynamic adaptation allows the system to maintain reliability during interruptions while preserving measurement precision.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of the smoothing window from a fixed time-based approach to a signal-state-based approach. By monitoring signal characteristics and adjusting the window parameters (start and end points) based on detected signal presence and transitions, the system adapts the smoothing process to current signal conditions. This parameter change enables the system to handle interruptions and multiple signals effectively while maintaining accurate signal identification.

Inventive Principle:
Principle #35Parameter changes

2Measurement precision

If pre-segmented data and multiple passes are used to generate accurate signal identification, then signal identification accuracy improves, but processing time and system complexity increase

Engineering Contradiction:
Improvesignal identification accuracyVSAvoidprocessing time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by performing signal classification and identifying potential signals of interest in a first pass through the data. During this initial scan, the system pre-identifies candidate signals and their time ranges, then uses this preliminary information to guide the second pass where actual smoothing and identification occur. This preliminary classification reduces the computational burden of the second pass and eliminates the need for multiple additional passes, thereby maintaining high accuracy while reducing total processing time.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent segments the signal processing task into distinct phases: a first pass for classification and candidate identification, and a second pass for detailed smoothing and signal confirmation. By dividing the processing into these segments with different objectives, the system achieves accurate signal identification in the second pass while the first pass prepares the data structure to minimize the need for further re-processing, thus reducing overall processing time compared to traditional multiple-pass approaches.

Inventive Principle:
Principle #1Segmentation

3Ease of manufacture

If a fixed time window is used for smoothing the classifier output, then the smoothing process is simple to implement, but the system cannot adapt to variable signal conditions and interruptions

Engineering Contradiction:
Improveimplementation simplicityVSAvoidadaptability to signal variations
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent transforms the fixed time window into a dynamic window that automatically adjusts its boundaries based on signal conditions. The window starts at detected signal transitions and ends at subsequent transitions or interruptions, making it adaptable to variable signal lengths and gaps. This dynamic approach maintains relative implementation simplicity while dramatically improving adaptability to different signal conditions, interruptions, and multiple concurrent signals.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The smoothing system performs self-service by automatically detecting signal transitions and using them to define the smoothing window boundaries without requiring external configuration or manual adjustment. The system monitors its own input signal, identifies transitions autonomously, and adjusts the window parameters accordingly. This self-adjusting capability provides high adaptability to varying signal conditions while keeping the implementation relatively simple, as the system configures itself based on observed signal characteristics.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS8635181B2System and method for tagging signals of interest in time variant data
Publication Date: 2014.01.21 AT&T INTELLECTUAL PROPERTY I L P
  • US8635181B2 patent drawing
  • US8635181B2 patent drawing
  • US8635181B2 patent drawing

AI summary

Disclosed herein are systems, computer-implemented methods, and computer-readable storage media for tagging a known signal of interest. Initially, the system classifies the data from an input signal using a short-term classifier, wherein there are at least two classifications available, a first classification of the data as having no identified outputs and a second classification of the data as at least one potential signal of interest, wherein the short-term classifier also bypasses data that is known to be of no interest. After the short-term classifier classifies the inputs, it collapses the input data that is classified as having no identified outputs. This allows the short-term classifier to create time-variant data. Finally, the system will tag a known signal of interest in the time-variant data that was classified as having at least one potential signal of interest. Therefore, a system for tagging a known signal of interest is described.