Audio Signal Processing for Mixed Format Broadcasting
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Solution Overview
Problem
Existing TV systems struggle to provide high-quality broadcasting when receiving mixed languages and audio formats via a single channel, as they lack the capability to selectively decode and output the appropriate audio signal from multiple formats.
Innovation Solution
An audio signal processing method that prioritizes and selects the appropriate audio format from multiple formats received in a single channel, allowing for decoding and output of the selected audio signal, along with a broadcasting output apparatus that includes a tuner, selection unit, and audio processor to achieve this.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a TV system receives mixed languages and audio formats via a single channel, then broadcasting diversity and language support are improved, but the system complexity increases and the ability to provide high-quality audio broadcasting deteriorates
Solution Approach 1:
The patent segments the audio signal processing by separating different audio formats into distinct processing paths. The audio DSP identifies and processes each audio format (MPEG, Ac3, Ac3+, AAC, HE-AAC) through separate decoding mechanisms, allowing the system to handle multiple languages and formats simultaneously without overwhelming complexity.
Solution Approach 2:
The patent implements dynamic audio format selection where the system can adaptively switch between different audio decoding methods based on the received signal. The audio DSP dynamically determines which format to process based on the broadcast signal characteristics, enabling flexible language and format support while managing system complexity through intelligent adaptation.
2Reliability
If a TV system decodes multiple audio formats from a single channel, then audio quality and language options are improved, but processing time and computational resources increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the audio DSP with knowledge of multiple audio formats and their decoding requirements before receiving the broadcast signal. The system prepares multiple decoding paths in advance and can quickly switch between them based on the received signal, reducing real-time processing time while maintaining high audio quality across different formats.
Solution Approach 2:
The patent implements feedback mechanisms where the audio DSP continuously monitors the received audio signal characteristics and adjusts the decoding process accordingly. This feedback allows the system to identify the most suitable audio format and switch decoding methods dynamically, optimizing processing time and resource utilization while ensuring high audio quality.
3Adaptability or versatility
If a single channel transmits mixed audio formats, then service diversity is improved, but the ability to provide consistent high-quality broadcasting deteriorates
Solution Approach 1:
The patent applies local quality by treating different audio formats and languages with specialized processing tailored to their specific requirements. Each audio format receives dedicated decoding and processing resources, ensuring that each language and format maintains high quality standards appropriate to its characteristics, while the overall system maintains consistent broadcasting quality across all services.
Data Source
AI summary
An audio signal processing method and a broadcasting output apparatus using the audio signal processing method are provided. The audio signal processing method includes selecting an audio signal to be processed from among a plurality of audio signals in which the same audio data is compressed in different formats, when the plurality of audio signals are received; and processing the selected audio signal. Therefore, it is possible to select a high quality audio signal from among audio signals compressed in various audio formats and to provide a user with the high quality sound.