Uninformed: Informative Information for the Uninformed

Vol 8» 2007.Sep

Media Gateway Audio Modifications

RTP, as a protocol being potentially routed across multiple networks by its underlying transport, network, and data-link protocols, may also be routed or gatewayed along its path by other intermediary telephony devices like Media Gateways or Back-to-Back User Agent (B2BUA) devices. At such transition points, the media being transported may undergo potential modification. Some of these modifications include translation from one audio Codec to another, down-sampling, normalization, or mixing with other audio streams. Invasive changes such as these can potentially impact the integrity of any message data embedded within the stego-medium.