DMB/DAB Audio Mixing Unit for Simultaneous Service Output
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Solution Overview
Problem
Conventional DMB/DAB systems can only output a single audio signal at a time, limiting user experience as they cannot simultaneously play multiple audio signals without stopping one broadcast.
Innovation Solution
A method and apparatus for mixing and outputting multiple audio signals in a DMB/DAB device, which includes a broadcast receiving unit, a mixing unit, and an output unit to combine and play audio signals from different services, allowing users to listen to multiple audio streams without interrupting video broadcasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single audio signal is output at a time in conventional DMB/DAB systems, then the system complexity is low, but the user convenience and versatility are limited
Solution Approach 1:
The patent combines multiple audio signals (first audio signal from first service and second audio signal from second service) into a mixed audio signal that is output simultaneously. The mixing unit merges these signals while maintaining their individual identities, enabling users to listen to multiple audio streams at once without stopping any broadcast.
Solution Approach 2:
The patent segments the audio output into distinct channels or streams, allowing the first audio signal and second audio signal to be processed and output independently while maintaining their separate identities. This segmentation enables selective output of different audio services without interference.
2Ease of operation
If multiple audio signals are output simultaneously, then user convenience is improved, but the device complexity increases
Solution Approach 1:
The mixing unit automatically mixes the first audio signal and second audio signal without requiring manual intervention or complex user control. The system self-manages the audio signal processing, combining multiple inputs into a unified output stream while maintaining ease of operation for the user.
Solution Approach 2:
The mixing unit acts as an intermediary component between the multiple audio signal sources and the output device. It receives the first audio signal and second audio signal, processes and combines them, then outputs the mixed signal, simplifying the overall system architecture while enabling multi-audio output.
3Adaptability or versatility
If audio signals from different services are mixed, then versatility is enhanced, but signal processing complexity increases
Solution Approach 1:
The mixing unit is designed with multi-functionality to handle audio signals from different services (first service and second service). It can process various audio formats and service types, making the system universally applicable to different broadcast services without requiring service-specific processing for each type.
Data Source
AI summary
A method and an apparatus are provided for mixing and outputting plural audio signals included in plural services of a DMB/DAB device. The method includes receiving a DMB/DAB broadcast signal, outputting audio of a first service by extracting the first service from the received broadcast signal, selecting audio of a second service by extracting information of the second service from the received broadcast signal, mixing audio signals of the first and second services, and outputting the mixed signal.