Tandeming/Transcoding Issues Between MPEG-4 and H.263

摘要

Transcoding implies the translation and mapping of the syntax of one standard onto the other without the need of any further decoding and re-encoding processes. It is distinctively important for the real life scenarios where two different standards are run, such as terrestrial and mobile-satellite links. In the light of this fact, this paper presents a novel and challenging study and implementation of mapping process between the MPEG-4 bitstream syntax and the H.263 bitstream syntax. Since the transcoding process does not embrace the very time consuming decoding and encoding schemes in already significant time elapsed satellite communications, the main goal to be achieved is to keep the processing power and time as low and short as possible. It also helps improve the QoS (Quality of Service) supported by the link operators.