A GPU may help with media. GPUs tend to be SIMD / Stream processors. So some problems map well to that architecture, some less so. Lots of GPUs tend to work on

A GPU may help with media. GPUs tend to be SIMD / Stream processors. So some problems map well to that architecture, some less so. Lots of GPUs tend to work on four pixel quads of RGBA data with very specialised instruction sets, which are not really CISC or RISC but are maybe more RISC like. This is good for graphics rendering both 2D and 3D, video and audio encoders and decoders are trickier, some parts like motion estimation can be implemented on a GPUs SIMD architecture but the bitstream process is very serial by design so fits badly to a SIMD architecture and is not great on CPU either, having a custom piece of hardware or FPGA maybe a better solution.