Broadcast Signal Demodulation Using Preamble-Based Frame Selection
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Solution Overview
Problem
The high cost and large circuit size, as well as power consumption, of devices that require separate processors for processing DVB-T2 and FEF frames, necessitate a solution for efficiently processing multiplexed signals from different broadcast standards.
Innovation Solution
A signal processing device with a detector to identify preamble signals, a demodulator to process signals based on discrimination information, and a controller to continue or stop demodulation accordingly, allowing the same device to process DVB-T2 and DVB-NGH signals by interpreting signals as either standard, thereby reducing hardware requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate processors are used for processing T2-frames and FEFs, then processing reliability is improved, but device cost and circuit size increase
Solution Approach 1:
The patent implements a universal signal processing device that can handle both T2-frames and FEFs through a single integrated processor. The device uses a frame type detection unit to identify the frame type and dynamically adjusts its processing mode accordingly, eliminating the need for separate dedicated processors while maintaining processing reliability for both frame types
2Reliability
If separate processors are used for processing T2-frames and FEFs, then processing reliability is improved, but power consumption increases
Solution Approach 1:
The patent employs dynamic processing where the signal processing device detects the frame type and adaptively switches between different processing modes. This dynamic approach allows a single processor to handle both T2-frames and FEFs efficiently, reducing power consumption compared to having two always-active dedicated processors while maintaining reliable processing for both frame types
3Device complexity
If a single processor processes both T2-frames and FEFs, then device cost and circuit size are reduced, but processing capability may be compromised
Solution Approach 1:
The patent segments the signal processing into distinct phases: frame type detection, conditional processing decision, and execution of appropriate demodulation. By dividing the processing workflow and using discrimination information from the preamble signal to guide processing, the single processor maintains full processing capability for both frame types while avoiding the need for separate hardware processors
Data Source
AI summary
The present technology relates to a signal processing device, a signal processing method, and a program capable of appropriately demodulating a desired signal from a multiplexed signal obtained by multiplexing a plurality of signals. A preamble signal is detected from a multiplexed signal obtained by multiplexing a plurality of signals. When information for discriminating each of the signals that is contained in the preamble signal indicates a first signal, demodulation by a demodulator is continued and the first signal is demodulated. When information for discriminating each of the signals that is contained in the preamble signal indicates a second signal, demodulation is not performed by stopping the demodulation by the demodulator. The present technology can be applied to a signal processing device that processes signals for digital broadcasting.