Video Bitstream Switching for Split Screen Memory Management

The patent applies local quality by assigning different bit stream types to different split screen configurations. Specifically, high definition bit stream type is used when bandwidth is sufficient, while standard definition or smoothness bit stream types are used when bandwidth is limited. This allows each split screen scenario to receive the appropriate quality level locally, rather than uniformly applying high definition across all scenarios.

The patent changes the bit stream type parameter based on the number of split screens and available bandwidth. The system dynamically adjusts between high definition, standard definition, and smoothness bit stream types according to the playback scenario, thereby optimizing the balance between video quality and bandwidth consumption without requiring manual intervention.

The patent implements preliminary action by pre-establishing a correspondence relationship between different split screen modes and appropriate bit stream types. Before switching split screen modes, the system determines the current mode and proactively selects the corresponding bit stream type from the preset correspondence, ensuring that the bit stream type is appropriately adjusted before playback begins, thereby preventing memory crashes and maintaining system stability.

The patent employs feedback by continuously monitoring the current split screen mode and using this information to determine the appropriate bit stream type. The system receives feedback about the number of split screens and the current playback mode, then uses this feedback to automatically adjust the bit stream type selection, creating a closed-loop control system that maintains both flexibility and stability.