DV Format Recording Device Data Segmentation for Frame Editing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices face challenges in efficiently recording and editing video and audio signals in the DV format, as converting DV format signals to MPEG format for storage on disk recording media complicates post-recording processes and hinders frame editing.
Innovation Solution
A recording and reproducing device and method that extracts audio and video data from DIF streams, reconstructs system data by eliminating unnecessary information, and records these in separate areas on a disk medium, allowing for error detection and correction, thereby optimizing data structure for editing and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If video and audio signals in DV format are converted into MPEG format for recording on disk, then storage capacity is saved through higher compression efficiency, but frame editing capability is lost and post-recording processes become impossible
Solution Approach 1:
The patent segments the recorded data into distinct areas: a file allocation area containing file management information and a data area containing the DIF stream data. This segmentation allows the system to maintain the original DV format data structure while adding disk-optimized file allocation mechanisms, enabling both efficient storage and frame editing capability.
Solution Approach 2:
The patent performs preliminary actions by pre-calculating and storing file allocation information in the file allocation area before actual data recording. This includes pre-allocating data blocks and storing allocation maps, which enables efficient data retrieval and editing operations without compromising the original DV format structure.
2Ease of operation
If DIF stream is recorded without conversion to MPEG format, then frame editing capability is maintained, but data structure is not optimized for disc recording resulting in complicated post-recording processes
Solution Approach 1:
The patent introduces a file allocation area as an intermediary layer between the DIF stream data and the disk storage structure. This intermediary contains file allocation information that mediates between the linear DIF stream format and the random access requirements of disk storage, simplifying post-recording processes while maintaining frame editing capability.
Solution Approach 2:
The patent changes the organizational parameters of the data structure by separating file allocation information from the actual DIF stream data. This parameter change transforms the data organization from a monolithic DIF stream into a structured format with distinct allocation and data areas, optimizing it for disk recording without altering the underlying DV format.
3Reliability
If DV format data is directly recorded on disk without reorganization, then original data integrity is maintained, but system information management becomes non-uniform and editing operations become complicated
Solution Approach 1:
The patent segments the recording structure into a file allocation area and a data area, where the file allocation area uniformly manages system information while the data area preserves the original DIF stream integrity. This segmentation enables uniform information management for editing operations while maintaining the reliability of the original DV format data.
Data Source
AI summary
Audio DIF blocks containing audio data and video DIF blocks containing video data are extracted by an audio/video extracting unit and respectively recorded in separate storage areas of an HDD. System data and audio auxiliary data are extracted by a system data reconstruction unit and thereafter recorded in a system data storage area of the HDD together with frame information generated by a frame information generating unit. The respective data items are recorded in these separate areas, while the audio auxiliary data is recorded together with the system data, and therefore it is easy to rewrite the data during an editing operation.