DTV Receiver Interface for Multi-Format Packet Transmission
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Solution Overview
Problem
Existing receiver devices require dedicated terminals and lines to transmit both transport stream (TS) and variable-length packets, leading to increased costs and circuit size, as well as potential changes in backend processor specifications.
Innovation Solution
An interface device that performs demodulation and error correction on incoming carrier waves, extracts TS and variable-length packets, and selectively outputs them as a data signal in sync with a clock signal, allowing both packet types to be transmitted through the same terminal and line without increasing the number of terminals or lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dedicated terminals and lines are provided to transmit variable-length packets, then the ability to transmit both TS packets and variable-length packets is improved, but the cost and circuit size increase
Solution Approach 1:
The existing terminal and line designed for TS packet transmission are made multi-functional by enabling them to transmit both TS packets and variable-length packets. The interface device detects packet type and selectively outputs appropriate packets through the same transmission path, eliminating the need for dedicated terminals while maintaining full transmission capability
Solution Approach 2:
The transmission paths for TS packets and variable-length packets are merged into a single shared terminal and line. The interface device combines multiple packet types into one output stream, allowing both packet formats to be transmitted through the same physical connection without requiring separate dedicated lines
2Adaptability or versatility
If dedicated terminals and lines are provided to transmit variable-length packets, then the transmission capability is improved, but the circuit size increases
Solution Approach 1:
The transmission interface is designed as a universal channel that can handle both TS packets and variable-length packets. The interface device includes packet type detection and selective output functionality that allows a single terminal to serve multiple transmission purposes, reducing the circuit area required for additional dedicated terminals
3Adaptability or versatility
If the number of terminals is increased to transmit variable-length packets, then the transmission flexibility is improved, but the backend processor specifications must change
Solution Approach 1:
The interface device creates a universal transmission channel that maintains compatibility with existing backend processor specifications. By detecting packet types and selectively outputting through the same terminal used for TS packets, the system provides enhanced transmission flexibility without requiring changes to backend processor terminal configurations
Data Source
AI summary
A method of transmitting a data signal in sync with a clock signal in a DTV receiver. The method includes performing demodulation processing and error correction processing on an input carrier wave and outputting signals resulting from these types of processing; acquiring a transport stream (TS) packet included in the signals; acquiring a variable-length packet included in the signals; and selecting either the TS packet or the variable-length packet and outputting the selected packet as the data signal, where to variable-length packet is either a type length value (TLV) packet or an Internet protocol (IP) packet.