Due to the isochronous nature of multimedia streams, jitter management; represents a major challenge to synchronized and timely presentation of multimedia documents. For controlling jitter, we propose the Initial Delay Regulator (IDR). This regulator is based on a network model which abstracts jitter parameters inside a data network. As a result of employing such a regulator, jitter at the destination node can be reduced. and possibly eliminated. depending on resource availability. The IDR is simple enough to be implemented wing specialized hardware. Since IDR is memory intensive, two dynamic resource allocation schemes are presented for hard and soft QoS requirements. The memory allocation schemes have low time complexity to accomodate the highly dynamic nature of multimedia documents. IDR is further evaluated through simulation. Results show that IDR can reduce jitter even for unbounded stocastic traffic.