Bidirectional talkback processing system

By using an audio echo cancellation chip and power amplifier module in the subway train broadcast intercom system, combined with a transformer and a bidirectional audio bus, the echo and howling problems were solved, and high-quality two-way intercom communication was achieved.

CN224178254UActive Publication Date: 2026-04-28WAYCOM TECH CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202520596803.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-01
Publication Date
2026-04-28
Estimated Expiration
2035-04-01

AI Technical Summary

Technical Problem

Traditional analog bus intercom systems suffer from echo and audio feedback problems, which are particularly difficult to suppress effectively at high-power audio output, affecting communication quality and train operation.

Method used

The system employs the ML7037-003TB audio echo cancellation chip and the LM4950TS audio power amplifier module, combined with a transformer and a bidirectional audio bus, to achieve echo cancellation and feedback suppression through frequency and time domain filtering, dynamic noise suppression, and gain adjustment.

Benefits of technology

It significantly improves audio signal quality, avoids echo and feedback, ensures voice clarity, adapts to complex noise environments, and is suitable for driver-passenger intercom and emergency alarm signal processing.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses a two-way talkback processing system, and belongs to the field of voice signal processing. The system combines an advanced audio processing technology, and particularly uses an audio echo processing chip and an audio power amplifier module. Through an accurate echo cancellation algorithm (including frequency domain and time domain filtering), dynamic noise suppression and real-time gain adjustment, the system can significantly improve audio signal quality, avoid echo and self-excitation squeal phenomena, and ensure voice definition. The two-way audio signal stream design and the modular structure of the system enable the system to adapt to complex noise environments and various audio application scenarios, including talkback between drivers and passengers and processing of emergency alarm signals. In addition, through the design of audio bus transmission, audio power amplifier module amplification, transformer isolation and the like, stable transmission and high-quality output of audio signals are ensured. On the whole, the stability, definition and adaptability of the audio communication system are improved, and the echo problem in a traditional system is solved.
Need to check novelty before this filing date? Find Prior Art