Peter Monta

A real-time implementation of the improved MBE speech coder

A real-time, single digital signal processing (DSP) chip implementation of a 2.4-, 4.8-, and 8.0-kb/s improved multiband excitation (IMBE) vocoder is presented. The IMBE vocoder is based on the MBE speech model, and it is shown to generate high-quality speech under both clean and noisy conditions. In addition, the IMBE vocoder is well suited for real-time implementation since it does not require excessive computation or storage. Full-duplex operation is demonstrated using a single AT&T WE DSP 32. Aspects of the hardware architecture, algorithm implementation, and system performance are addressed.<<ETX>>

Designing a video compression system for high definition television

There has been significant interest in the design of a digital television system for terrestrial HDTV broadcasting. The authors discuss various issues related to the design of a HDTV system. They examine the design of a video compression system for the efficient delivery of digital television signals. A number of considerations that arise when designing the video compression system are discussed, and a sample system which meets most of these requirements is presented. It is shown that the video compression principles and system issues can be integrated into a framework for designing a high-performance digital HDTV system.<<ETX>>