diy "memory recording unit" using adc and motion jpeg algorithm

specification:

1.high speed ADC > 200M sps.
2.two channel ADC for Y-C signal.
3.low speed ADC for sound recording.
4.DSP or high speed CPU for audio/video data stream compress algorithm.
5.using large capacity SDRAM (>16G) for pre-record.
6.using high speed CF card for mass storage devide.