Broadcast Receiver Adaptive Switching for Analog Digital Transitions
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Solution Overview
Problem
Existing broadcast receivers face challenges in smoothly switching between analog and digital broadcasts due to varying receiving characteristics, leading to potential hearing discomfort for users, as they rely on fixed reference values rather than adaptive matching based on the received radio wave state.
Innovation Solution
A broadcast receiver with a switching mechanism, detection means, and adjusting components that dynamically match the frequency characteristics and channel separation of digital broadcasts to those of analog broadcasts, ensuring seamless transitions by adjusting the reproduced frequency band and left-right separation based on the detected radio wave state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed reference values are used for matching receiving characteristics, then the switching between analog and digital broadcast can be simplified, but the switching cannot be carried out smoothly except under fixed optimized conditions
Solution Approach 1:
The patent applies dynamics by making the frequency characteristic and channel separation of digital broadcast adjustable and adaptive to the analog broadcast receiving state. Instead of fixed reference values, the system dynamically adjusts these parameters based on detected analog signal conditions, allowing smooth switching across varying radio wave states. The control unit modifies digital broadcast characteristics in real-time to match the currently received analog broadcast quality.
2Adaptability or versatility
If the frequency characteristic and channel separation are adjusted adaptively, then smooth switching can be achieved, but the complexity of the device increases
Solution Approach 1:
The patent applies universality by using a single control unit that performs multiple functions: detecting analog broadcast receiving state, determining matching ranges for frequency characteristic and channel separation, and adjusting digital broadcast parameters. This multi-functional approach achieves adaptive switching without proportionally increasing device complexity, as one unit handles what would otherwise require multiple separate components.
3Device complexity
If matching is based on preset reference levels, then the control process is simplified, but hearing discomfort occurs during switching under varying reception conditions
Solution Approach 1:
The patent applies feedback by using the detecting unit to continuously monitor the analog broadcast receiving state and using this information to adjust the digital broadcast characteristics through the control unit. This closed-loop feedback mechanism ensures that the frequency characteristic and channel separation are continuously adapted to match current reception conditions, preventing hearing discomfort during switching while maintaining manageable control complexity.
Data Source
AI summary
When switching from a digital broadcast to a analog broadcast, a broadcast receiver switches to the analog broadcast after adjusting the reproduced frequency band and the degree of left-right separation of the digital broadcast to be equal to the values of the analog broadcast specified from the receiving state of the analog broadcast respectively, and, when switching from the analog broadcast to the digital broadcast, after adjusting the reproduced frequency band and the degree of left-right separation of the digital broadcast to be equal to the specified values of the analog broadcast respectively and then switching to the digital broadcast, adjusts the reproduced frequency band and the degree of left-right separation of the digital broadcast to be equal to values set for the digital broadcast respectively.