Partial Transport Stream Extraction for Digital Satellite Tuners

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Solution Overview

Problem

Conventional digital satellite broadcast tuners outputting through IEEE 1394 interfaces transfer unnecessary TS packets, leading to wasted record capacity and integrity issues, as they cannot transmit information from sections like EIT and SDT on partial transport streams, limiting their use in connected devices such as personal computers.

Innovation Solution

An information processing system that extracts permitted TS packets, inserts necessary sections as private sections, and outputs the stream as a partial transport stream, allowing forbidden sections like EIT and SDT to be transmitted as private sections, enabling their use on connected devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If all TS packets are transferred through the interface, then no information is lost, but record capacity is wasted and integrity issues occur

Engineering Contradiction:

Improveinformation completenessVSAvoidrecord capacity waste

Core Design Contradiction:

Loss of informationVSLoss of substance

Solution Approach 1:

The patent extracts only the necessary TS packets (video, audio, and selected PSI/SI sections) from the complete transport stream, excluding unnecessary packets such as NIT and certain SI sections. This selective extraction maintains information completeness for essential content while eliminating record capacity waste from transferring all packets.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The transport stream is segmented into different packet categories (video, audio, PSI, SI) with different transfer policies. Essential packets are transferred while non-essential ones are excluded, creating a optimized partial transport stream that balances information completeness with efficient resource utilization.

Inventive Principle:

Principle #1Segmentation

2Loss of substance

If a partial transport stream is output, then record capacity is saved, but sections like EIT and SDT cannot be transmitted

Engineering Contradiction:

Improverecord capacity efficiencyVSAvoidmissing section information

Core Design Contradiction:

Loss of substanceVSLoss of information

Solution Approach 1:

The patent introduces a selective packet filtering mechanism that acts as an intermediary between the complete transport stream and the output interface. This mediator selectively permits or blocks specific packet types based on predefined criteria, enabling efficient partial stream output while preserving access to essential information sections like EIT and SDT when needed.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of information

If NIT packets are recorded, then network information is complete, but integrity of information is compromised

Engineering Contradiction:

Improvenetwork information completenessVSAvoidinformation integrity

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The patent extracts and excludes NIT packets from the transferable stream, recognizing that while network information completeness might seem beneficial, the presence of NIT packets actually compromises information integrity. This extraction prevents the integrity issue while maintaining access to essential network information through other means.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS7908639B2Information transfer apparatus and method, information processing apparatus and method, and information processing system

Publication Date: 2011.03.15 SATURN LICENSING LLC

AI summary

When a transport stream is transmitted between each unit connected through an interface, if any data which is not permitted to be transmitted on a partial transport stream is transmitted, information of this section is transmitted as a private section or a user private. As a result, information of a section of an EIT can be transmitted from for example a digital satellite broadcast tuner to a personal computer and an original program schedule list can be created on the personal computer.