Patent ID: 6052744
Filing Date: 2000-04-18
Classification: G06F,H04N

Abstract:
A multi-media controller adapted for operation in a computer system including a processor, an input/output (I/O) bus and system memory operably coupled together, the controller comprising:a video direct memory access (DMA) channel and an audio direct memory access (DMA) channel, each of which are operably coupled to the input/output bus;a video request channel operably coupled to fetch a video request packet from the system memory to effectuate transfer of a video data stream from the system memory through the video DMA channel;an audio request channel operably coupled to fetch an audio request packet from the system memory to effectuate transfer of an audio data stream from the system memory through the audio DMA channel, wherein said video DMA channel is operable to transfer said video data stream independent of and concurrent with said audio DMA channel transferring said audio data stream;a video sub-picture DMA channel operably coupled to the input/output bus; anda video sub-picture request channel operably coupled to fetch a video sub-picture request packet from the system memory to effectuate transfer of a video sub-picture data stream from the system memory through the video sub-picture DMA channel.