Captioned Telephone Language Switching for Accurate Multilingual Calls

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Solution Overview

Problem

Hearing-impaired individuals in multilingual regions face challenges with captioned telephone services due to slow and inaccurate language detection, requiring manual selection from extensive language lists and delays when switching caption languages, leading to inefficiencies.

Innovation Solution

A CTS system with user interfaces for setting primary and secondary languages, allowing quick changes during calls, and automatically detecting or recommending contact languages, with interfaces for seamless language switching and pre-registration of native languages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual language selection from extensive language lists is implemented, then language detection accuracy is improved, but time consumption and operation complexity increase

Engineering Contradiction:
Improvelanguage detection accuracyVSAvoidtime for language selection
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system pre-registers the user's native languages in the device settings before the phone call occurs. During the call, the system automatically detects the peer's language and selects the appropriate pre-registered language without requiring manual intervention, thus resolving the contradiction between accurate language detection and time consumption.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system performs automatic language detection and selection without requiring manual intervention from the user. The CTS application autonomously identifies the peer's language and switches to the appropriate pre-registered language, eliminating the time-consuming manual selection process while maintaining accurate language detection.

Inventive Principle:
Principle #25Self-service

2Measurement precision

If manual language selection from extensive language lists is implemented, then language detection accuracy is improved, but operation complexity increases

Engineering Contradiction:
Improvelanguage detection accuracyVSAvoidease of language selection
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The system performs automatic language detection and selection without requiring manual intervention from the user. The CTS application autonomously identifies the peer's language and switches to the appropriate pre-registered language, eliminating the complex manual selection process while maintaining accurate language detection.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system pre-registers the user's native languages in the device settings before the phone call occurs. During the call, the system automatically detects the peer's language and selects the appropriate pre-registered language without requiring manual intervention, thus resolving the contradiction between accurate language detection and operation complexity.

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If language switching during phone call is enabled, then adaptability is improved, but system complexity increases

Engineering Contradiction:
Improvelanguage switching capabilityVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system pre-registers the user's native languages in the device settings before the phone call occurs. This preliminary configuration enables quick language switching during calls without requiring complex real-time processing, thus improving adaptability while minimizing system complexity.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system uses pre-registered language profiles as intermediaries between the user and the language switching process. When language switching is needed, the system refers to these pre-configured profiles rather than creating new language configurations in real-time, simplifying the switching mechanism while maintaining high adaptability.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Measurement precision

If call agent switching is required for language changes, then language accuracy is improved, but call continuity and time efficiency deteriorate

Engineering Contradiction:
Improvelanguage transcription accuracyVSAvoidcall delay time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system changes the language parameter of the existing ASR engine rather than switching to a different call agent. By adjusting the language parameter within the current ASR engine, the system maintains call continuity and eliminates delays associated with agent switching, while still achieving accurate language transcription through the engine's multi-language capability.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS12581011B2User interface to select or change caption language for captioned telephone service system
Publication Date: 2026.03.17 MEZMO CORP
  • US12581011B2 patent drawing
  • US12581011B2 patent drawing
  • US12581011B2 patent drawing

AI summary

A Captioned Telephone Service (“CTS”) system, equipped with a CTS application, offers several user interfaces. These interfaces are designed to set the primary and secondary languages of the user, as well as the caption language of a contact. This configuration ensures that the caption language of a phone call matches the caption language assigned to the contact if the call is made with that contact. Additionally, if the caption language during a phone call is found to be incorrect, the system allows for a swift change to another language. This could be either the primary or secondary language of the user, or a completely different language, as required during the call.