Bandwidth compression for digital transmission of hand drawn graphics
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Transmission of handwriting and sketches as a minimal bandwidth extension of conventional telephony has been employed for several years. Although these analog systems are useful, it is digital transmission which shows most promise in resistance to noise and distortion, and in compatibility with computer-generated graphics and PCM telephony. The bandwidth required by digital transmission must be reduced before such systems are viable. In this thesis, the development of several bandwidth reduction schemes based on predictive encoding are discussed. The prediction model coefficients were obtained from experimental picture and handwriting data and this data was used to simulate the encoding algorithms. The compression ratios and the complexity of the various schemes are described.
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This work is available on request. You can request a copy at https://library.carleton.ca/forms/request-pdf-copy-thesis
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Copyright © 1976 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 1976
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