A ready solution can be found from one of our partners, microLEX Systems. They provide Mixed-Signal, Audio and Functional test systems. Please let me refer you to their website:
The products you may be interested in include:
VideoMASTER - a Video Analyzer for Component Video (HDTV), S-Video & Composite Video
HearMaster - Audio Measurements for Hearing aids, Loudspeakers, and Audiometers
SequenTEST - Test sequencing in LabVIEW
...and maybe more.
Let me know if you have further questions or if this does not resolve your issue!