Audio Decoding Device External Parameter Override
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Solution Overview
Problem
Audio decoding devices for digital television broadcasting struggle to appropriately adjust loudness and control sound localization when parameters in stream data become inappropriate, leading to uncomfortable listening experiences.
Innovation Solution
An audio decoding device that receives and decodes two types of stream data, using external settings to override inappropriate parameters for loudness adjustment and sound localization control, ensuring appropriate audio processing even when internal parameters are incorrect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If parameters in stream data are used for loudness adjustment and sound localization control, then audio processing can be performed according to broadcast content, but the parameters may become inappropriate depending on reception conditions, leading to incorrect loudness adjustment and sound localization
Solution Approach 1:
The patent introduces an external setting section as an intermediary between the stream data parameters and the audio data processing section. This external setting allows operators to input alternative parameter values that override the stream data parameters when they are found to be inappropriate, thereby mediating the conflict between adapting to broadcast content and ensuring reliable audio processing under varying reception conditions
Solution Approach 2:
The patent enables dynamic parameter changes by allowing the system to switch between using parameters from stream data and parameters from external settings. When reception conditions change or stream data parameters are found inappropriate, the system can change the parameter values used for audio processing through the external setting section, thus adapting to different operational scenarios while maintaining reliability
2Ease of manufacture
If main audio data and auxiliary audio data are simply combined, then decoding process is simple, but the loudness becomes larger than necessary which is not comfortable for listening
Solution Approach 1:
The patent applies parameter changes by introducing a loudness adjustment parameter that controls the mixing level between main audio data and auxiliary audio data. Instead of simply combining the audio data with equal weight, the system uses adjustable parameters to control the contribution of each audio source, thereby reducing excessive loudness while maintaining decoding simplicity
3Ease of operation
If parameters for processing are included in stream data, then loudness adjustment and sound localization control can be performed, but the device complexity increases due to the need for external setting section and parameter validation
Solution Approach 1:
The patent extracts the parameter setting function from the core decoding process and places it in a separate external setting section. This extraction allows the main decoding path to remain simple while providing enhanced control capabilities through an optional external parameter input mechanism, thus reducing the perceived device complexity while maintaining ease of operation
Data Source
AI summary
An audio decoding device comprises an audio decoding section for decoding first stream data and second stream data to generate two pieces of audio data and a data processing parameter, an external setting section in which a parameter corresponding to the data processing parameter is set, and an audio data processing section for processing the two pieces of audio data. When the data processing parameter contained in the second stream data is inappropriate, the audio data processing section performs data processing using the parameter set in the external setting section. When the data processing parameter contained in the second stream data is appropriate, the audio data processing section performs data processing using the data processing parameter generated by the audio decoding section.