A multi stream video editing system using uncompressed video data for real-time rendering performance, and for non real-time rendering acceleration

摘要

An architecture for performing real-time image processing on multiple image data streams using compressed or uncompressed image data includes a switch for forwarding data from multiple input sources to multiple destinations on a video processing device. The video processing device includes two independent processing pipelines for processing two different data streams. The switch may couple one or both input data streams to be multiple different destinations. Multiple video processing devices may be coupled via the switch to increase the number of data streams capable of being processed at any given time. Mixers are coupled in a cascaded fashion using the switch, thereby providing selective keying capability and allowing for multiple keying events to be entered during one phase of processing. Each of the processing pipelines on the video processing device includes dedicated processing logic, compression logic and frame buffer storage. Logic is provided with each frame buffer to support motion effects. By providing two distinct processing pipelines, greater control may be achieved for production of an output image. The architecture may be easily augmented to include a datapath for processing uncompressed image data. Data management techniques allow uncompressed image data to be processed in real time. A simple mechanism is provided to enable switching between processing using compressed data and uncompressed data at any point in the video production process.