A Degraded Quality Service Policy for reducing the transcoding loads in a Transcoding Proxy

Abstract

Transcoding is one of core techniques that implement VoD services according to QoS. But it consumes a lot of CPU resource. A transcoding proxy transcodes multimedia objects to meet requirements of various mobile devices and caches them to reuse later. In this paper, we propose a service policy that reduces the load of transcoding multimedia objects by degrading QoS in a transcoding proxy. Due to the tradeoff between QoS and the load of a proxy system, a transcoding proxy provides lower QoS than a client's requirement so that it can accomodate more clients.

Degraded Quality Service Policy with Bitrate based Segmentation in a Transcoding Proxy

“…This policy was proposed in [21], and we simulated it in [7]. Transcoding is often computing intensive, especially for multimedia content.…”

“…In that paper, they just proposed the "secondary hit". So, we adopted that idea and simulated it [7].…”

“…In general, video transcoding is a computationintensive task. So, we proposed the DQS(degraded quality service) policy to reduce the CPU cost of transcoding, in our second previous paper [7].…”