Digital Receiver 3D Caption Processing and Disparity Control

The caption data processing is segmented into separate functional modules: a caption data generator that creates caption data based on command codes, a disparity value processor that handles depth information, and a display controller that manages the rendering. This modular segmentation allows 3D caption functionality to be added without overwhelming system complexity, as each module handles a specific aspect of the processing chain.

Command codes are introduced as an intermediary mechanism between the 3D content source and the caption display system. These command codes carry instructions for generating caption data and specifying disparity values, allowing the system to interpret and process 3D caption requirements without requiring complex proprietary protocols. This intermediary layer enables compatibility while supporting advanced 3D functionality.

The system implements dynamic control of disparity values through frame count parameters and smooth transition mechanisms. Instead of applying abrupt disparity changes, the processor gradually adjusts caption depth over multiple frames, allowing the user's visual system to adapt. The dynamics principle is applied by making the disparity adjustment rate variable rather than fixed, enabling smooth transitions that prevent vertigo while maintaining accurate 3D positioning.

The caption disparity adjustment is implemented through periodic frame-based updates rather than continuous or instantaneous changes. By controlling the rate of disparity change through frame counts and using incremental adjustments across multiple display frames, the system creates a rhythmic, controlled progression of depth changes that is visually comfortable for users while achieving precise 3D caption positioning.

The command code structure is designed with universal applicability, where a single set of command codes and processing rules can handle multiple caption windows and multiple 3D content streams. The disparity value processing mechanism works uniformly across all caption windows regardless of their position or content type, eliminating the need for window-specific control logic and simplifying the management of multiple caption data streams.

The system uses parameter-based control where caption window characteristics (position, disparity, size) are defined by adjustable parameters rather than fixed configurations. By changing parameters such as disparity values and frame counts dynamically, the system can efficiently manage multiple caption windows without increasing structural complexity. Each window is controlled through parameter adjustment rather than requiring separate control mechanisms.