DVD Subpicture Decoder for MPEG Data Stream Graphics
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Solution Overview
Problem
MPEG-based television systems have limited capabilities for displaying complex graphics and animation, and lack interactivity in data channel information, restricting the display of non-text information and user interaction.
Innovation Solution
Incorporating DVD subpicture formatted information into the MPEG data stream, allowing for enhanced graphics functionality and interactivity by using a DVD subpicture decoder to process and overlay graphics on the video program, enabling the transmission and display of data channel information such as stock quotes, program guides, and advertisements, and supporting interactive menu selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MPEG decoder OSD functions are used to display data channel information, then text information can be displayed, but complex graphics and animation cannot be decoded and displayed
Solution Approach 1:
The patent combines MPEG video decoding with DVD subpicture decoding in a single receiver system. The DVD subpicture decoder processes graphics and animation data that are multiplexed with the MPEG video stream, allowing both video and enhanced graphics to be displayed simultaneously through overlay composition.
Solution Approach 2:
The receiver is designed to handle multiple data formats and display requirements through a single system. The DVD subpicture decoder can process various graphics formats, animation sequences, and interactive data, making the system versatile for different data channel information display needs beyond simple text OSD.
2Adaptability or versatility
If MPEG decoder OSD functions are used for data display, then data channel information can be transmitted, but interactivity with the viewer is not facilitated
Solution Approach 1:
The DVD subpicture format includes interactive features that enable feedback between the viewer and the displayed information. Users can interact with menu structures, select different data channel information, and navigate through content using remote control inputs, creating an interactive experience rather than passive display.
3Adaptability or versatility
If DVD subpicture decoder is added to the receiver, then enhanced graphics functionality is achieved, but device complexity increases
Solution Approach 1:
The patent segments the decoding functionality by separating MPEG video decoding from DVD subpicture graphics decoding into distinct processing paths. This modular approach allows each decoder to be optimized independently while sharing common control and output composition resources, managing overall system complexity.
Data Source
AI summary
A method and apparatus for using DVD subpicture formatted information within a MPEG data stream to provide data channel information to a television receiver. More particularly, the television receiver comprises a MPEG decoder and a DVD subpicture processor. The MPEG decoder decodes the MPEG stream and extracts the DVD subpicture formatted signal and the DVD subpicture decoder processes one or more DVD subpicture bitstreams to produce DVD graphics. The DVD subpicture bitstream is used to carry and display data channel information such as stock quotes, electronic program guide information, advertisement information, and the like as well as provide interactive menuing functions.