Digital Signal Receiver Clock Stability Control
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Solution Overview
Problem
Conventional digital signal receivers waste power as they operate sections before a stable clock signal is generated and process data even when it's not present, leading to increased power consumption and circuit complexity due to unnecessary operations and header processing.
Innovation Solution
A digital signal receiver with a control section that pauses operations until a stable clock signal is generated and only processes data when present, reducing power consumption by selectively operating sections based on data availability and channel selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sections operate before stable clock signal is generated, then processing can begin earlier, but power is wasted and operations are unstable
Solution Approach 1:
The control section determines in advance whether data is present in the digital AV signal before instructing processing sections to operate. This preliminary check prevents unnecessary operations and power consumption while ensuring processing only occurs when data is actually available, resolving the contradiction between early processing and power efficiency
2Measurement precision
If header separating means and header analyzing means are added to determine encryption, then encryption detection is accurate, but circuit scale increases
Solution Approach 1:
The control section performs multiple functions: it determines data presence, identifies data types (video/audio), and detects encryption status using a single integrated unit. This multi-functional approach eliminates the need for separate header separating and analyzing means, achieving accurate encryption detection without increasing circuit scale
3Duration of action of stationary object
If video data processing section and audio data processing section operate continuously, then data processing is uninterrupted, but power is wasted when no data is present
Solution Approach 1:
The operating state of processing sections is dynamically adjusted based on real-time data presence determination. The control section instructs processing sections to operate only when data is detected and to pause when no data is present, transforming the static continuous operation into a dynamic on-demand operation that eliminates power waste
4Speed
If signal receiving sections for unselected channels are operated, then channel switching is fast, but power is wasted on unnecessary sections
Solution Approach 1:
The receiver is divided into multiple independent signal receiving sections, each capable of independent operation. The control section selectively activates only the receiving section corresponding to the selected channel, while pausing other sections. This segmentation allows fast channel switching while eliminating power waste on unselected channels
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces power consumption without increasing circuit scale by ensuring only necessary components are active, optimizing power usage in digital signal receivers.
Implementation Method 1
The above-described operation clock signal is generated by a phase locked loop provided in the digital signal receiver.
Data Source
AI summary
A digital signal receiver comprises a signal separating section (11), a clock signal generating section (12), a video data processing section (14), an audio data processing section (15), and a control section (17). The clock signal generating section (12) generates an operation clock signal (105) for the signal separating section (11), the video data processing section (14), and the audio data processing section (15). The control section (17) pauses the signal separating section (11), the video data processing section (14), and the audio data processing section (15) until receiving a clock stability signal (108) indicating that the operation clock signal (105) is stable, the clock stability signal (108) being generated by the clock signal generating section (12).