An H.264/MPEG-4 audio/visual CODEC LSI with module-wise dynamic voltage/frequency scaling

A single-chip H.264/MPEG-4 audio/visual LSI for mobile applications with a module-wise dynamic voltage/frequency scaling architecture is described. This LSI operates even during the voltage/frequency transition with no performance overhead by using a dynamic de-skewing system and an on-chip voltage regulator with slew-rate control. The IC consumes 90mW in decoding QVGA H.264 video at 15f/s and MPEG-4 AAC LC audio simultaneously.