New MPEG2 decoder architecture using frequency scaling
Jeong‐Min Kim, Soo‐Ik Chae · 1996
In this paper, we present a new clocking scheme in digital systems, called frequency scaling. It makes the system clock adjust to the lowest possible level, while maintaining the minimal processing capability for the current work-load. Therefore, the data-dependent algorithm, which requires simpler hardware and lower power consumption than the data-independent algorithm, can be used in real-time applications. We applied frequency scaling to two key function blocks of the MPEG2 decoder, that is VLD and IQ-IDCT, which have work-load with large variance in time.