Low Rate Speech Coding

Presentations:

• Motorola Open Day, 30 April, 1998
  • Overhead Slides
    • Slides in Postscipt format
    • Slides (4 per page) in Postscipt format
  • Demos

    The slides describe two speech coders operating at 1.9kbps and 2.4kbps. Below the reproduced speech achieved from these two speech coders are compared with a few speech coding standards.

    The original speech waveform. Together with the MELP coder and the FS1016 CELP coder this speech file can be found at the DDVPC site which gives details about the recent selection of the new 2.4kbps speech coder. Click to hear demo.

    The MELP coder, which was selected as the new 2.4kbps standard. Click to hear demo.

    The FS1016 4.8kbps CELP speech coder. One of the aims of the new 2.4kbps standard was that it perform better than the FS1016. Click to hear demo.

    The LPC-10e 2.4kbps speech coder. This is the speech coder the new 2.4kbps standard is designed to replace. The source code for the speech coder can be found at http://www.arl.wustl.edu/~jaf/lpc/.
    Click to hear demo.

    The 1.9kbps PWI-ZFE speech coder. Click to hear demo.

    The 2.35kbps MMBE speech coder. Click to hear demo.

• Overhead Slides for the Motorola Open Day, 24 April, 1997
  • Slides in Postscipt format
  • Slides (4 per page) in Postscipt format

Publications:

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

Papers are provided in HTML format for viewing online, and in postscript for printing. All the postscript files are complete, but not all papers have been fully converted to HTML. For all papers the abstract can be viewed online. The papers can be read online by clicking on the paper's title.

Pre-Prints of Papers submitted for publication

• A 1.9 kbps Zinc Function Excited, Waveform Interpolated Speech Codec
  F.C.A. Brooks and L. Hanzo, submitted to 1998 IEEE Vehicular Technology Conference, Ottawa, Canada, May 18-21, 1998
• A 2.4 kbps Waveform Interpolation Speech Codec Incorporating Wavelet-Based Techniques
  F.C.A.Brooks, L. Hanzo, Submitted to IEEE Trans. on Audio and Speech Processing, 1998