Reliable real-time video/audio communications through a wireless channel is of great importance in modern information warfare. Robust low bit rate video transmission has been examined throughly in our Phase I study. Recommendation II.263 with a subband decomposition was adopted as the baseline coding scheme, fast motion vector search algorithms were developed and error control and recovery mechanism for data protection was incorporated in Phase I, while system simulation for various wireless noisy channels is to be carried out in Phase I Option. One major contribution in Phase I is the development of a scalable video transmission method. This proposal consists of work plans for both Phase II and Phase II Option. We will focus on three key areas in Phase II: (1) robust audio transmission and audio/video synchronization, (2) multiple access and call setup for wireless communication, (3) scalable audio/video transmission through heterogeneous and dynamically changing wired networks such as the Internet. Even though the type of noise in the source/channel coding are common and can be conveniently tested with existing infrastructures. In Phase II Option, we will work on system integration, prototyping, and simulators. The new technology finds many military and commercial applications including multimedia personal communication systems (MPCS), teleconferencing, videophone, etc. We plan to utilize the work in Phases I and II to develop a software/hardware integrated system for handling real audio/video test data and demonstrate the developed system in existing Navy tactical aircraft and transfer the technology to commercial applications such as mobile multimedia communication and cellualr videophone in Phase III.
Benefits: Military: TV camera with remote viewing for guidance, communications, reconnaisance, surveillance and other uses with sensors that are ground-based or mounted on UAV, missiles, guided bombs, aircraft, ships, submarines, and other platforms. Commercial: mobile multimedia transmission, cellular videophone, teleconferencing, wireless ATM (asynchronous transfer mode) networks and interactive video through internets.
Keywords: Wireless Video CDMA Internets Call Setup Multimedia Communications Wireless Audio Scalable Coding Error-Resilient Coding