| EPSRC Reference: |
GR/K78072/01 |
| Title: |
VARIABLE BIT RATE TIME ENVELOPE VOCODER USING SOURCE DEPENDENT RATE SWITCHING |
| Principal Investigator: |
Kondoz, Professor A |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Electronics & Physical Sciences |
| Organisation: |
University of Surrey |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 1996 |
Ends: |
30 June 1998 |
Value (£): |
114,549
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| EPSRC Research Topic Classifications: |
| Digital Signal Processing |
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Summary on Grant Application Form |
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This project involves an investigation into a novel speech coder design. In this so called (recently invented at University of Surrey) Time Envelope Vocoder, speech is compressed down to 1.6 kb/s. Although the speech quality at such a low bit rate is considered to be good, we found it to be variable. The main reason for this is the variations in the speech synal characteristics. It is therefore very important to make the speech analysis block size variable so to allow adaptability to the changing sound characteristics. This, we fell, will improve the speech quality significantly. Although it will lead to a variable bit rate coder, the overall average bit rate is expected to be well below 2.4 kb/s. This will then be further enhanced by flexible coding structure and switchable parameter quantisation schemes.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.surrey.ac.uk |