Video Recording Apparatus Selective Data Extraction
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Solution Overview
Problem
Conventional video recording/reproducing apparatuses with large capacity recording media, such as HDDs, quickly run out of space when recording high-definition television signals due to the inclusion of all data in the transport stream, including video, audio, and data broadcasting, which reduces recording capacity unnecessarily.
Innovation Solution
The apparatus selectively records video and audio data while excluding data broadcasting, allowing users to choose between recording modes that include or exclude caption data, thereby optimizing storage capacity and maintaining high picture quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all data in the transport stream (including video, audio, and data broadcasting) is recorded, then complete program information is preserved, but recording space is reduced quickly
Solution Approach 1:
The patent extracts and removes data broadcasting from the transport stream before recording, while preserving video and audio data. This selective extraction resolves the contradiction by eliminating unnecessary data (data broadcasting) that consumes recording space without providing long-term value, thereby extending recording capacity while maintaining essential program information.
Solution Approach 2:
The patent changes the composition parameter of the recorded data by excluding data broadcasting packets from the transport stream. This parameter modification allows the system to record more programs within the same storage capacity by reducing the data volume per program while maintaining the core viewing experience.
2Quantity of substance
If data broadcasting is excluded from recording, then storage capacity is extended, but complete program data is not preserved
Solution Approach 1:
The patent applies different quality standards to different data types within the transport stream. Video and audio data are preserved in full quality as they are essential for program viewing, while data broadcasting is excluded as it provides supplementary information only. This local quality differentiation resolves the contradiction by maintaining necessary program data while extending storage capacity.
3Manufacturing precision
If high-definition television signals are recorded as is, then picture quality is maintained, but recording space is consumed rapidly
Solution Approach 1:
The patent extracts data broadcasting components from the high-definition television signal before recording. This extraction maintains the full quality of video and audio components while removing the space-consuming data broadcasting portion, thereby resolving the contradiction between maintaining picture quality and conserving recording space.
Data Source
AI summary
In a television receiver including a video recording/reproducing apparatus therein, since reduction is quick in a recording space thereof if recording the high-definition television broadcast signal as it is, even including a recording medium, such as, a HDD of large capacity, for example, video, audio and caption data are extracted within a video extract portion 3, an audio extract portion 4, a caption extract portion 5 from a MPEG2-TS (Transport Stream) signal (TS=video+audio+caption data+BML (Broadcast Markup Language)+other data), but except for the BML data. And, those data extracted are recorded in a recording/reproducing portion 7.