Packet Identifier Table Generation in Digital TV Receivers
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Solution Overview
Problem
Conventional digital television receiver devices are unable to process transport stream packets effectively when program information tables are not correctly recovered, leading to failure in restoring audio and video content.
Innovation Solution
A method and system that enables a receiver device to generate a packet identifier table by reading and mapping packet identifier values from transport stream packets, allowing it to identify and filter data types even without program information tables, by entering a PID scan mode and constructing a packet identifier table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional receiver devices rely on program information tables for processing transport stream packets, then the device can correctly identify and restore audio and video content, but the device fails to operate when program information tables are not recovered
Solution Approach 1:
The receiver device performs self-service by automatically generating a packet identifier table through scanning and analyzing transport stream packets when conventional program information tables are unavailable. The device independently identifies packet identifier values and data types without external assistance, enabling continuous operation despite missing program information tables.
Solution Approach 2:
The patent introduces an intermediary packet identifier table that bridges the gap between unavailable program information tables and the need for packet identification. This intermediate structure allows the receiver to function by providing alternative mapping information between packet identifiers and data types when the original program information tables cannot be recovered.
2Adaptability or versatility
If the receiver device enters PID scan mode to generate a packet identifier table, then it can operate without program information tables, but the processing complexity increases
Solution Approach 1:
The patent segments the transport stream processing into distinct phases: normal processing using program information tables, and fallback PID scan mode when tables are unavailable. The scanning process itself is segmented into reading packet identifiers, identifying data types, and generating the alternative table. This segmentation makes the complex fallback process manageable and organized.
Solution Approach 2:
The receiver device dynamically switches between two operational modes: normal mode using program information tables and PID scan mode when tables are missing. The system adapts its processing complexity based on the availability of program information tables, using simple table-based lookup when possible and more complex scanning only when necessary.
Data Source
AI summary
One embodiment of the present invention sets forth a method of generating a packet identifier table that comprises reading a packet identifier value from a received transport stream packet, identifying a type of data contained in the received transport stream packet, and generating a table with mapping information between the packet identifier value and the identified type of data.