Digital Broadcast Receiver Ignoring Signal Portions for Scanning
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Solution Overview
Problem
Digital broadcast receiver devices require additional resources to scan for other services during the time slots of the desired service, which is costly in terms of silicon area and power consumption, especially when handling time-multiplexed signals with error correcting codes.
Innovation Solution
A receiver node that actively ignores a portion of the signal during designated ignore periods, using error correcting codes to reconstruct the missed data and perform background scanning for other services, allowing a single receiver to receive a desired service while scanning for available services from other transmitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single receiver is used to receive the desired service, then the device complexity is reduced, but the ability to scan for other services is compromised
Solution Approach 1:
The receiver periodically switches between receiving the desired service and scanning for other services by creating ignore periods within the service reception time periods. During these ignore periods, the receiver tunes to other frequencies to scan for available services, then returns to receive the desired service. This periodic switching enables both service reception and scanning capabilities with a single receiver.
Solution Approach 2:
The receiver performs scanning actions during ignore periods that are predetermined within the service reception schedule. By planning these scan periods in advance and using error correcting codes to reconstruct missed data, the system prepares for service switching needs without requiring continuous dual-receiver operation.
2Adaptability or versatility
If two receivers are provided for scanning and receiving services, then the service scanning capability is improved, but the device complexity and cost increase
Solution Approach 1:
A single receiver is designed to perform multiple functions: receiving the desired service, scanning for other services, and reconstructing missed data using error correcting codes. The receiver can switch between these functions by creating ignore periods during service reception to perform scanning operations, eliminating the need for separate dedicated receivers for each function.
Solution Approach 2:
The patent combines the functions of service reception and service scanning into a single receiver unit. By merging these previously separate functions and using error correcting codes to handle the intermittent reception, the system reduces hardware complexity while maintaining both capabilities.
3Adaptability or versatility
If the receiver scans for other services during time slots, then the service awareness is improved, but the power consumption increases
Solution Approach 1:
The receiver performs scanning operations periodically during predetermined ignore periods rather than continuously. This allows the receiver to remain in low-power mode during service reception and only activate full scanning functionality during scheduled intervals, reducing overall power consumption while maintaining service awareness.
Solution Approach 2:
The error correcting code system automatically reconstructs missed service data without requiring continuous active reception. This self-service capability allows the receiver to enter lower power states during ignore periods while still maintaining service quality through automatic data reconstruction.
4Adaptability or versatility
If the receiver ignores part of the signal to perform scanning, then the scanning capability is improved, but the signal reception quality may deteriorate
Solution Approach 1:
The signal is pre-encoded with error correcting codes that provide a cushion against data loss. This beforehand protection enables the receiver to ignore portions of the signal during scanning periods while still being able to reconstruct the complete service data accurately, maintaining reliability despite intermittent reception.
Solution Approach 2:
The system changes the reception parameter by selectively ignoring specific time periods within the service signal. By controlling which portions of the signal are received and which are ignored, the system optimizes between scanning capability and reception quality, using error correcting codes to ensure reliable reconstruction.
Data Source
AI summary
A receiver node for use in a digital broadcast system, comprising a receiver configured to receive a signal containing a service encoded with an error correcting code for decoding and wherein said receiver is further configured to ignore the signal during an ignore period, the node configured to use said error correcting code and the encoded service received outside the ignore period to reconstruct the part of the service ignored by the receiver.