Digital Broadcasting Receiver Automatic Channel Setting
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Solution Overview
Problem
Current digital broadcasting technologies lack a method to automatically set and switch between digital broadcasting channels using different transmission technologies, such as VSB and QAM, in a single receiver, limiting the ability to seamlessly receive and decode both ground wave and cable digital TV broadcasting signals.
Innovation Solution
A method for a digital broadcasting receiver that performs channel selection and switching by detecting the modulation technology of incoming signals, allowing it to automatically set and switch between channels using VSB and QAM technologies, enabling the receiver to identify and process channels based on synchronization signals and construct a channel map for storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a receiver is designed to receive both cable digital TV broadcasting (QAM) and ground wave digital TV broadcasting (VSB), then the adaptability of the receiver is improved, but the device complexity increases due to the need to support multiple transmission technologies
Solution Approach 1:
The receiver is designed with multi-functional capability to receive both cable digital TV broadcasting (QAM) and ground wave digital TV broadcasting (VSB) signals. The channel setting method enables a single receiver to automatically adapt to different transmission technologies by detecting signal types and applying appropriate decoding parameters, making the device universal without requiring separate receivers for different broadcasting standards.
Solution Approach 2:
The receiver performs automatic channel setting by autonomously detecting whether incoming signals are cable or ground wave broadcasting types. The system automatically selects appropriate receiving parameters and decoding methods based on signal detection results, eliminating the need for manual configuration and reducing user burden while handling multiple transmission technologies.
2Ease of operation
If manual channel setting is performed for each transmission technology, then the ease of operation is maintained, but the loss of time increases due to the need to separately set channels for VSB and QAM technologies
Solution Approach 1:
The receiver performs preliminary automatic channel setting by detecting signal types and pre-configuring receiving parameters before actual signal reception. By automatically identifying whether signals are cable or ground wave broadcasting and pre-setting appropriate decoding parameters, the system prepares the receiver in advance, eliminating the need for time-consuming manual channel exploration and setup for each transmission technology.
Solution Approach 2:
The system automatically performs channel setting operations without user intervention. The receiver autonomously detects signal types, selects appropriate receiving parameters, and completes channel configuration independently, significantly reducing both the time required and the operational complexity compared to manual channel setting methods.
3Measurement precision
If separate channel exploration is performed for VSB and QAM technologies, then the measurement precision of channel detection is improved, but the productivity decreases due to the extended channel exploration time
Solution Approach 1:
The patent merges the channel setting processes for VSB and QAM technologies into a single unified automatic setting operation. Instead of performing separate channel explorations for each transmission technology, the system combines signal detection, type identification, and parameter configuration into one integrated process, maintaining detection accuracy while significantly improving channel setting speed and productivity.
Solution Approach 2:
The receiver performs preliminary signal type detection and parameter selection before actual channel reception. By pre-identifying whether signals are cable or ground wave broadcasting and pre-configuring appropriate receiving parameters, the system eliminates the need for extended channel exploration time while maintaining precise channel detection accuracy.
Data Source
AI summary
Provided is a method for setting a digital broadcasting channel in a digital broadcasting receiver having a tuner and a demodulator. According to the method, when an automatic channel setting command is input by a user, a channel is selected using a tuner, and whether an NS flag is detected in each channel is judged. When the NS flag is not detected as a result of the judgment, a mode of each selected channel of the digital broadcasting receiver where signals are detected is judged from a VSB mode and a QAM mode. A channel map is constructed according to the judgment result. Accordingly, the method allows a subscriber or a manufacturer to automatically detect signals and store a corresponding channel in a channel map without separately setting cable broadcasting in cable digital TV broadcasting environment where VSB and QAM modes are provided.