ITTC Project

Novel Digital Speech Compression Techniques

Project Award Date: 0000-00-00


The objective of this project is to develop novel medium bit rate speech coding algorithms which are compatible with existing low bit rate coders, and are robust to harsh transmission environments. This project addresses issues associated with the compression of digital speech data for a variety of applications related to the storage and transmission of speech. These applications include storage for intelligence analysis, storage for voice messaging systems, and congestion control in communications systems. The techniques developed here can best be described as "enabling technologies", in that they provide the basis for a substantial expansion of system capabilities, flexibility, and robustness. In particular, the methods discussed here allow speech to be coded and compressed in multiple stages, without interaction with the initial data source. This capability implies that data can initially be received and stored at high bit rates in order to provide high quality, and can later be efficiently converted to lower bit rates with minimal loss of quality. Preliminary work on this multi-stage approach suggests that quality comparable to that of single step coders can be attained. This project extends that work by using more advanced interpolation techniques, and by determining the proper parameters for best performance. In order to determine the performance of these algorithms in actual service, a voice mail application system suitable for wide-spread has been created. This application has text and window based user interfaces, and is portable to a variety of workstation architectures. As part of the development of the voice mail application, protocols for communication between computers running voice mail systems have been developed.


Project Sponsors

Primary Sponsor(s): Rome Laboratories (U.S. Air Force)

Partner with ITTC

The Information and Telecommunication Technology Center at the University of Kansas has developed several assistance policies that enhance interactions between the Center and local, Kansas, or national companies. 

ITTC assistance includes initial free consulting (normally one to five hours). If additional support is needed, ITTC will offer one of the following approaches: 

Sponsored Research Agreement

Individuals and organizations can enter into agreements with KUCR/ITTC and provide funds for sponsored research to be performed at ITTC with the assistance of faculty, staff and students.

Licensing and Royalty/Equity Agreement

An ITTC goal is the development of investment-grade technologies for transfer to, and marketing by, local, Kansas, and national businesses. To enhance this process, the Center has developed flexible policies that allow for licensing, royalty, and equity arrangements to meet both the needs of ITTC and the company.

Commercialization Development

Companies with a technology need that can be satisfied with ITTC's resources can look to us for assistance. We can develop a relationship with interested partners that will provide for the development of a technology suited for commercialization.

ITTC Resource Access

ITTC resources, including computers and software systems, may be made available to Kansas companies in accordance with the Center's mission and applicable Regents and University policies.

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