Receiving Device Analog Digital Audio Synchronization
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Solution Overview
Problem
Conventional receiving devices face challenges in maintaining constant processing times for analog and digital broadcast waves, leading to difficulties in adjusting the output time difference between digital and analog audio due to differences in demodulation processing times and communication timing between electronic components.
Innovation Solution
A receiving device with separate electronic components for demodulating digital and analog broadcast waves, where one component transmits a communication signal including the received signal and analog audio to another component, allowing for adjustment of the output time difference by using delay times and flags or reception times to synchronize the audio outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If demodulation of digital and analog broadcast waves is performed in different electronic components, then device functionality is improved, but processing time consistency deteriorates
Solution Approach 1:
The receiving device is divided into separate electronic components: a first electronic component for analog broadcast wave demodulation and a second electronic component for digital broadcast wave demodulation. This segmentation allows each component to be optimized independently while maintaining overall system functionality, resolving the contradiction between enhanced adaptability and processing time consistency.
2Adaptability or versatility
If separate electronic components are used for analog and digital demodulation, then system flexibility is improved, but output time difference adjustment becomes difficult
Solution Approach 1:
The analog broadcast wave is deliberately delayed by a preset time in advance, before the actual output stage. This preliminary timing adjustment compensates for the processing time differences between separate electronic components, making output time difference adjustment straightforward despite system flexibility improvements.
3Reliability
If processing times are kept constant, then synchronization is improved, but communication timing gaps cause adjustment difficulties
Solution Approach 1:
A communication signal is introduced as an intermediary between the first and second electronic components. This communication signal carries timing information that coordinates the demodulation processes, allowing synchronization to be maintained while managing the complexity of communication timing gaps between separate components.
Data Source
AI summary
A receiving device including a first electronic component and a second electronic component. The first electronic component includes: an analog audio demodulator that demodulates a received signal including a digital broadcast wave and an analog broadcast wave to output an analog audio, the analog broadcast wave being broadcast later by a preset first delay time than the digital broadcast wave; and a transmitter that transmits a communication signal including the analog audio and the received signal to the second electronic component. The second electronic component includes: a receiver that receives the communication signal from the transmitter; a digital audio demodulator that demodulates the received signal included in the communication signal to output a digital audio; and a selector that selects at least one of the digital audio and the analog audio as an output sound signal.