Broadcast Stream Interleaving with Dummy Insertion for Packet Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digital broadcasting technologies face challenges in efficiently and stably processing streams, particularly in ensuring reliable transmission and reception of digital broadcasting signals across diverse standards like ATSC VSB and DVB-T, which can lead to instability and packet loss.
Innovation Solution
A device and method for processing streams that includes a stream rearranging unit for vertical stacking and perpendicular rotation, a dummy inserting unit to add a dummy corresponding to the interleaver's memory size, and a convolutional interleaver, along with a dummy removing unit and burst generating unit, to enhance interleaving performance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional stream processing is used in digital broadcasting, then transmission can be implemented, but packet loss and instability occur during transmission and reception
Solution Approach 1:
The stream is divided into multiple packets and arranged in a two-dimensional array structure (N rows by M columns). This segmentation allows for systematic interleaving where packets are distributed across different rows and columns, ensuring that burst errors affect only limited portions of the original stream rather than causing widespread packet loss.
Solution Approach 2:
The patent introduces a two-dimensional arrangement of packets (rows and columns) instead of conventional one-dimensional processing. By interleaving packets across both dimensions and inserting dummy packets strategically, the system creates spatial separation between originally adjacent packets, thereby increasing interleaving intervals and improving resistance to burst errors.
2Reliability
If stream interleaving is performed to reduce packet loss, then transmission reliability improves, but processing complexity increases
Solution Approach 1:
Dummy packets are inserted into the stream at predetermined positions before the actual transmission occurs. This preliminary action ensures that when packets are arranged in the two-dimensional structure, the interleaving intervals are automatically optimized without requiring complex real-time calculations during transmission, thereby simplifying the processing complexity while maintaining reliability.
Solution Approach 2:
The patent optimizes the dimensions of the two-dimensional array (N rows and M columns) and the positions of dummy packets based on specific transmission conditions. By adjusting these parameters, the system achieves effective interleaving with controlled processing complexity, balancing reliability improvement against device complexity.
Data Source
AI summary
A device for processing streams is disclosed. The device includes a stream arranging unit which stacks and rearranges a stream, and a dummy inserting unit which inserts a dummy into the rearranged stream. The device may further include a convolutional interleaver which interleaves the stream with a dummy or an RS encoder and a CRC encoder.