Data Placement for Multi-user Interactive DTV

Raju Rangaswami, Edward Chang, Chen Li, and Milton Chen

Appears in IEEE International Conference on Multimedia and Expo, 2001


In this paper, we propose a novel digital VCR design, which can enable non-interactive broadcast DTV streams into interactive ones for supporting multiple playback devices simultaneously.To enable viewing interactivity (such as fast-forward and instant replay) for multiple users, we show that it is critical to organize data effectively for improving IO resolution, reducing disk latency and minimizing storage cost. We propose three data placement schemes that are built on a real-time memory management module. These schemes make different tradeoffs between IO resolution, disk latency and storage to maximize system throughput under different resource constraints.