Grass Valley Limited

James Edward Pearce

A system and method is provided for rendering key and fill video streams for video processing. The system includes a database that stores video data including a video stream of a sequence of images and alpha data defining transparency levels for each portion of each image. An encoder encodes each frame of the sequence of images to generate encoded composite frames that each contain a fill portion and a key portion, such that each encoded composite frame includes both the fill and key portions that are disposed horizontally and side-by side with respect to each other. A renderer having a single decoder decodes each encoded composite frame to extract pixel values from the fill portion and respective transparency levels from the key portion and in order to generate a proxy of the respective frame to be displayed by a video processing device.

System and method for rendering key and fill video streams for video processing

A system and method is provided for constructing filter graph-based media processing pipelines to render media content. The system includes a web browser running on a client device and for rendering media content, and a main application thread executed by a processor of the client device, The main application thread determines a processing function of media data received by the web browser; constructs a filter graph directly in the web browser that includes filters instantiated as web workers and for executing respective functions for the processing function of the media data; assesses a compatibility between the filters; and connects the filters via message channels upon compatibility. Moreover, one filter transmits media to a second filter after performing the respective function in which the second filter the enters the transmitted media in a queue and renders media content in the browser based on the queued media.

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Hampshire, United Kingdom

James Edward Pearce