Audio Processing Device for Simultaneous Main and Description Output
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Solution Overview
Problem
Current digital television (DTV) services cannot simultaneously satisfy the needs of both normal and visually impaired users to watch video programs, as they lack a method to differentiate audio outputs for main channel audio and audio descriptions, leading to an incomplete perceptual experience for visually impaired individuals.
Innovation Solution
An audio processing method and electronic device that acquire decoding results for main channel audio and audio descriptions in audio and video files, allowing these to be output through different audio devices, enabling normal users and visually impaired users to select their preferred audio outputs without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If audio description is added to DTV service to improve visually impaired users' perception experience, then the perceptual experience for visually impaired people is improved, but normal users cannot watch video programs without interference
Solution Approach 1:
The audio output is segmented into separate channels: main channel audio and audio description. The system divides the audio processing into distinct paths, allowing independent control and routing of different audio streams to different output devices, thus enabling visually impaired users to access audio description without interfering with normal users' viewing experience
Solution Approach 2:
The system introduces an intermediary mechanism (audio processing module) that detects user needs and routes appropriate audio streams to appropriate output devices. This intermediary layer manages the complexity of multiple audio streams and ensures that normal users receive only main channel audio while visually impaired users receive both main channel audio and audio description
2Device complexity
If main channel audio and audio description are output through the same audio device, then device complexity is reduced, but visually impaired users cannot perceive video content effectively while normal users may be disturbed
Solution Approach 1:
The audio processing system is designed with multi-functionality to handle different user scenarios. It can automatically detect whether a headphone is connected and switch between two modes: (1) when headphone is connected, route main channel audio to speaker and audio description to headphone; (2) when no headphone is connected, route both audio streams to speaker. This universal design allows the same system to serve both normal users and visually impaired users effectively
3Adaptability or versatility
If different audio devices are used for main channel audio and audio description, then user needs are satisfied simultaneously, but the system complexity and control difficulty increase
Solution Approach 1:
The system implements self-service by automatically detecting whether a headphone is connected and autonomously routing audio streams accordingly. The audio processing module monitors the audio output interface and automatically switches between different output configurations without requiring manual user intervention, thus reducing control complexity while maintaining adaptability
Data Source
AI summary
Embodiments of the present application disclose a method for audio and video processing and an electronic device. A first decoding result corresponding to main channel audio and a second decoding result corresponding to audio description are acquired according to audio data in an audio and video file; and the first decoding result as well as an audio mixed result of the first decoding result and the second decoding result are output respectively through different audio output devices, so that in a scenario where a normal user and a visually impaired user watch audio and video at the same time, the normal user and the visually impaired user can select different audio output devices for audio listening to ensure that the two do not affect each other, which satisfies the needs of the normal user and the visually impaired user to watch at the same time.