The invention relates to a
system and method for frequency channel packaging background
processing. The method comprises the following steps of rendering
delay image unit number obtaining, collecting
delay buffering by arranging an I / O
delay collecting card, image-text material loading, program
signal entering, delay
processing, judging, image-text
subtitle rendering, background video DVE rendering and outputting. According to the
system and method for frequency channel packaging background
processing,
delay time is rendered in real time according to an image-text rendering broadcast
server; collection delay is set inside the I / O delay collecting card; buffering processing is conducted on an input
signal source video; under the condition that image-text subtitles need to be overlapped on a background video, each background
video image unit undergoes delay buffering control inside the I / O delay collecting card and is overlapped with a GPU rendering result and directly output; under the condition that DVE processing is needed, each background
video image unit enters the I / O delay collecting card to undergo delay processing and is collected into a memory immediately, and then returns to the I / O delay collecting card after undergoing GPU rendering, and therefore seamless connection is realized.