Portable Terminal Audio Routing for Call Interruption
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Solution Overview
Problem
Conventional portable terminals stop outputting audio data when a call connection is received, disrupting services like DMB programs or music playback, and fail to seamlessly handle call connections while multiple users are watching a DMB program or listening to music.
Innovation Solution
An audio output apparatus and method that utilize a communication module, audio processor, and controller to detect call connection events and redirect speech signals to a secondary audio output device, such as an external earphone, without interrupting the primary audio output, ensuring continuous audio data output during call connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the portable terminal stops outputting audio data when a call connection is received, then the call connection service can be provided, but the audio data output (DMB program, music, etc.) is interrupted
Solution Approach 1:
The patent divides the audio output function into two separate audio output devices: a first audio output device for outputting audio data (DMB, music) and a second audio output device for outputting speech signals during calls. This segmentation allows both functions to operate simultaneously without interference, resolving the contradiction between maintaining call service reliability and ensuring audio output continuity.
Solution Approach 2:
The patent introduces an audio processor as an intermediary component that manages the routing of different audio streams to appropriate output devices. The audio processor receives audio data and speech signals, determines which output device should handle each stream, and routes them accordingly, enabling simultaneous operation without conflict.
2Duration of action of stationary object
If the portable terminal continues to output video data of DMB program during call connection, then video output is maintained, but audio data output is stopped
Solution Approach 1:
The patent segments the audio output function by introducing a second audio output device specifically for speech signals, while the first audio output device continues outputting audio data for video content. This allows video output continuity to be maintained while preventing audio data loss during call connections.
3Device complexity
If the portable terminal uses the same audio output device for both audio data and speech signals, then device simplicity is maintained, but audio output must be stopped for call connections
Solution Approach 1:
The patent applies segmentation by dividing the audio output function into two separate devices: a first audio output device for audio data and a second audio output device for speech signals. This increases device complexity slightly but enables continuous audio output during call connections, resolving the contradiction between device simplicity and audio continuity.
Solution Approach 2:
The patent implements dynamic switching capability where the audio processor can flexibly route different audio streams to appropriate output devices based on the current operational state. This dynamic routing allows the system to adapt to different scenarios (video playback, call connection, etc.) while maintaining optimal performance.
Data Source
AI summary
An apparatus and method for outputting audio in a portable terminal are provided. The apparatus includes a communication module for transmitting/receiving a call connection request and speech signals during a call connection service; an audio processor connected to at least one audio output device, for controlling the output audio data/speech signals through the audio output device, which is a first audio output device, and checking whether another audio output device is connected; and a controller for checking at the audio processor whether there is another audio device, which is a second audio output device, for outputting the speech signals received while outputting the audio data of an application service through the first audio output device, and when there is the second audio output device, for controlling the output of the speech signals through the second audio output device.