DCC Digital Curation Manual- File Formats

This chapter from the Digital Curation Manual, File Formats, begins with a conceptual framework for format and then goes on to discuss different aspects of format description, validation and characterization. It explains how format relates to the long term curation and usability of digital data and includes overviews of related projects and developments in the field as well as describing …

TRAC: Trustworthy Repositories Audit & Certification: Criteria and checklist

This document contains the current best practice on the organisational and technical infrastructure for reliable storage of digital collections, or trusted repositories. The document discusses the criteria trusted repositories should comply with, giving examples. The checklist – that begins with self assessment – can be used to get a picture of an orgaznisation’s own skill and the threats and risks …

Evaluation of the maximal modulation frequency for wow and flutter detection

Author of this paper participated in the development of several algorithms for wow and flutter characteristic determination. The algorithms were found useful in some real-life restoration procedures, however, there was no study of their capabilities in terms of the maximal determined modulation frequency. This paper presents such a study for three algorithms, i.e. the power-line hum tracker, high frequency bias …

Determining techniques for “wow”distortion

Algorithms for determining the wow distortion characteristic are proposed. These are the power-line-hum tracking algorithm, the high-frequency-bias tracking algorithm, and the algorithm based on an adaptive analysis of the center of gravity of the spectrum of the distorted signal. All of the algorithms presented allow a hardware- or software-based implementation.