DVB-T2 Reception Apparatus PLP Buffering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing decoding processes for DVB-T2 signals are inefficient due to the need to search for PLP information across multiple T2 frames, leading to prolonged decoding times when PLP information is not arranged contiguously within a single frame.
Innovation Solution
A reception apparatus and method that includes acquisition and search means to rapidly identify and decode OFDM signals by storing and searching for common packet sequences within received OFDM signals, allowing for faster decoding by identifying necessary PLP information within a single T2 frame or across adjacent frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PLP information is arranged non-contiguously across multiple T2 frames, then the reception apparatus can handle diverse transmission scenarios, but the decoding time increases significantly
Solution Approach 1:
The reception apparatus performs preliminary actions by storing PLP information from previous T2 frames in a buffer before it is needed. This allows the apparatus to have advance knowledge of PLP configurations, enabling faster decoding when PLP information is scattered across multiple frames. The buffer stores necessary PLP parameters so they are ready for immediate use when the corresponding data appears in subsequent frames.
Solution Approach 2:
A buffer acts as an intermediary between the PLP information search process and the decoding process. The buffer stores PLP information temporarily, mediating between the need to search across multiple frames and the requirement for fast decoding. This intermediary structure allows the apparatus to separate the search operation from the decoding operation, improving overall efficiency.
2Reliability
If the reception apparatus searches for PLP information across multiple T2 frames, then complete PLP information can be found, but the decoding process becomes prolonged
Solution Approach 1:
The apparatus performs preliminary search and storage of PLP information across multiple T2 frames before the actual decoding begins. By conducting the search in advance and storing results in a buffer, the apparatus ensures complete PLP information is retrieved while preparing it for rapid decoding operations.
Solution Approach 2:
The reception apparatus creates a copy of PLP information from multiple T2 frames and stores it in a buffer. This copying process allows the original PLP information to be retained across frame boundaries while creating a readily accessible copy for the decoding process, separating the search function from the decoding function.
3Productivity
If PLP information is stored in a buffer for rapid access, then decoding speed improves, but memory requirements increase
Solution Approach 1:
The buffer stores PLP information with local quality optimization, maintaining only the specific parameters and data needed for decoding at each location in the buffer. Rather than storing all possible PLP information universally, the system stores only the locally relevant PLP parameters for the current decoding context, reducing overall memory requirements.
Solution Approach 2:
The system implements partial action by storing only the necessary PLP information in the buffer rather than all possible PLP data. This selective storage approach ensures sufficient information for decoding while minimizing memory consumption, avoiding excessive storage of unnecessary data.
Data Source
AI summary
A reception apparatus is disclosed which includes: a reception section configured to receive an orthogonal frequency division multiplexing signal known as an OFDM signal formed by modulating common packet sequences and data packet sequences, the common packet sequences being made up of packets common to a plurality of streams, the data packet sequences being constituted by packets unique to each of the plurality of streams; an acquisition section configured to acquire decoding information for decoding the original streams from the common packet sequences and the data packet sequences obtained by demodulating the received OFDM signal; and a search section configured to search for the common packet sequence needed to decode the original streams from the designated data packet sequence on the basis of the acquired decoding information.