Digital Video Recording Apparatus Without Transcoding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for recording digital video information signals on disc-like carriers, such as MPEG Transport Streams, require transcoding, which can lead to loss of auxiliary data and quality issues, making them unsuitable for editing and incompatible with certain software formats.
Innovation Solution
An apparatus and method that detect data blocks in data packets, separate them, generate allocation information from headers, and allocate consecutive data blocks to logical units of a predetermined size, preserving the original format and allowing for efficient storage and editing without transcoding, and optionally providing copy protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transcoding is used to record digital video information signals on disc-like carriers, then recording compatibility is improved, but auxiliary data is lost and quality deteriorates
Solution Approach 1:
The patent extracts the data blocks from the MPEG Transport Stream packets and stores them directly in the Logical Unit structure without transcoding. This extraction approach preserves the original auxiliary data while achieving disc-like carrier compatibility through the LU structure mapping.
Solution Approach 2:
The patent introduces an intermediary processing layer that converts MPEG packet structure to Logical Unit structure without altering the actual video data blocks. This intermediary mapping enables compatibility with disc-like carriers while preserving the original data format and auxiliary information.
2Adaptability or versatility
If transcoding is used to record digital video information signals, then format compatibility is improved, but editing capability deteriorates
Solution Approach 1:
By extracting data blocks from the packet structure and storing them in Logical Units with direct addressing, the patent maintains the original data format integrity. This enables easy editing operations while achieving format compatibility through the LU structure that maps to disc sectors.
3Productivity
If data blocks are allocated to logical units of predetermined size, then storage efficiency is improved, but data structure complexity increases
Solution Approach 1:
The patent segments the continuous video data stream into fixed-size Logical Units that correspond to disc sectors. Each LU contains a header and data blocks, creating a segmented structure that improves storage efficiency while the systematic segmentation pattern actually simplifies the overall data management complexity.
Solution Approach 2:
The patent changes the data organization parameter from variable-size packets to fixed-size Logical Units with predetermined sector alignment. This parameter change improves storage efficiency and simplifies the mapping process to physical media, reducing the complexity of data management operations.
Data Source
AI summary
An apparatus for recording a real time stream of digital information signals on a disc like record carrier has been proposed. The stream of information signals represent information arranged in a sequence of video frames, each video frame arranged in separate, consecutive data blocks comprised in separate, consecutive data packets. The apparatus comprises input means (1) for receiving the stream of digital signals, processing means (100) for processing the stream of digital information signals to obtain digital information signals and writing means (102) for writing the digital information signals into the units of recording on the disc like record carrier. The processing means (102) are adopted to detect the data blocks in the data packets and to allocate consecutive data blocks comprised in multiple data packets into consecutive logical units, a size of each logical unit corresponding to the predetermined size of the unit of recording. This apparatus is specifically suitable for recording digital video (DV).