Demultiplexing Apparatus with Pre-Header Synchronization for UHDTV
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Solution Overview
Problem
The increasing data requirements for Ultra-High Definition Television (UHDTV) services exceed the physical channel capacity of existing digital broadcasting systems, necessitating the separation and transmission of MPEG-2 Transport Streams across multiple channels, while maintaining packet order and timing synchronization.
Innovation Solution
The implementation of a demultiplexing apparatus and method that uses pre-headers with packet number and timestamp fields to rearrange and synchronize MPEG-2 TS packets across multiple channels, allowing for efficient multi-channel transmission and reception of UHDTV data, minimizing transmission jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one TS is separated into multiple channels for transmission, then the data transmission capacity is improved, but the packet order and timing synchronization deteriorate
Solution Approach 1:
The patent applies preliminary action by inserting pre-headers containing packet number fields and timestamp fields into TS packets before distribution across multiple channels. This pre-marking enables the receiving end to restore packet order and timing synchronization without requiring complex real-time processing, thus resolving the contradiction between improved transmission capacity and maintained reliability
2Productivity
If multiple channels are used to transmit UHDTV data, then the data throughput is improved, but the transmission jitter increases
Solution Approach 1:
The patent implements feedback mechanisms through timestamp fields in pre-headers that provide timing information to the receiving end. This enables the receiver to synchronize packet reconstruction based on original transmission timing, reducing transmission jitter while maintaining high throughput across multiple channels
3Adaptability or versatility
If pre-headers with packet number and timestamp fields are added, then the packet rearrangement capability is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the pre-header into distinct functional fields (packet number field, timestamp field, sync byte field) that can be independently processed. This modular structure improves packet rearrangement capability while keeping the implementation complexity manageable through field-by-field processing at the receiving end
Data Source
AI summary
A demultiplexing apparatus, a multiplexing apparatus, and a multi-channel transmission and reception method using the same are provided. The demultiplexing apparatus includes a broadcasting data reception unit for separating a broadcasting data stream into N input packets, an output packet generation unit for generating (N+1) output packets by connecting a pre-header, including a field for multi-channel transmission, with each of the N input packets, and a packet distribution unit for distributing the (N+1) output packets over at least two channels. The multiplexing apparatus includes a packet restoration unit for detecting first field information for restoration and second field information for synchronization from each of pre-headers included in (N+1) output packets received through at least two channels and generating N restoration packets using the first field information and an output synchronization unit for performing output timing synchronization between the N restoration packets using the second field information.