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Proceedings Paper

Impairment of picture quality by signal format transitions and cascading of bit rate reduction algorithms in contribution, post-processing, and distribution of television picture signals
Author(s): Alexander Schertz
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Paper Abstract

In the foreseeable future the application of digital techniques in production, transmission, storage and processing as well as in distribution of television signals will involve the coexistence of various signal formats including analog ones and the increasing use of bit rate reduction procedures. The possible impairment of the picture quality by the application of various and possibly cascaded data rate reduction procedures in the framework of this development has not yet been clarified sufficiently. In order to support the public broadcasters of Germany, Austria, and Switzerland in introducing and utilizing digital techniques, the IRT carried out studies on this question in close cooperation with the broadcasters. For this purpose, a scenario of all relevant television chains from production to transmission was drawn up, a source tape including a selection of suitable test sequences was produced and these sequences were fed in all the selected chains. The results were recorded and subjective tests were carried out to evaluate the impairment of the picture quality. This paper includes the results of a quality assessment by experts at an intermediate stage of the project. The results of subjective tests are presented.

Paper Details

Date Published: 17 February 1995
PDF: 9 pages
Proc. SPIE 2451, Advanced Image and Video Communications and Storage Technologies, (17 February 1995); doi: 10.1117/12.201187
Show Author Affiliations
Alexander Schertz, Institut fuer Rundfunktechnik GmbH (Germany)

Published in SPIE Proceedings Vol. 2451:
Advanced Image and Video Communications and Storage Technologies
Naohisa Ohta; Heinz U. Lemke; Jean Claude Lehureau, Editor(s)

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