Recording and Reconstruction of AV Signal

Course guarantor:

Lecturer:

Tutor:

Supervisor:

Department of Radioelectronics

Synopsis:

The course provides a comprehensive overview of methods of analog and digital recording of sound and images, modern procedures for digitizing historical media and algorithms for the restoration of degraded audiovisual recordings. Emphasis is placed on the description of advanced algorithms and practical knowledge related to the digitization and restoration of records, including scanning film material, digitizing magnetic tapes, removing artifacts and noise. The graduate will also be familiar with standards for archiving and formats for long-term preservation. The acquired knowledge will be applied in the field of AV media production, radio, television and film studios, as well as in memory institutions (archives).

Requirements:

Syllabus of lectures:

1. Consequences of signal discretization on sound perception. Psychoacoustic optimization of sound signals, dithering, noiseshaping.

2. Digital sound recording - physical principles, error protection, source coding.

3. Digital recording formats for sound.

4. Magnetic analog sound recording.

5. Mechanical and optical analog sound recording.

6. Analog recording artifacts, global degradation, broadband noise removal methods.

7. Impulse interference, algorithms for detecting impulse interference, their removal.

8. Methods of reconstruction and restoration of archival audio recordings, digitization.

9. Analog and digital video formats, magnetic and optical recording.

10. Recording images on film, types of emulsions, types of degradation.

11. Digitization of analog video and film, scanners, resolution, dynamic range, correction during digitization.

12. Digital methods of reconstruction and restoration of archival recordings, stabilization, scratch removal, noise reduction.

13. Advanced reconstruction methods, increasing dynamic range, super resolution.

14. Preservation audio and video formats.

Syllabus of tutorials:

1. Úvod, pravidla předmětu

2. Analýza vlivu diskretizace zvukových signálů, signál nízké úrovně - Matlab

3. Analýza metod psychoakustické optimalizace zvukových signálů (dithering, noiseshaping) - Matlab

4. Noiseshaping vyšších řádů, sigma-delta modulace - Matlab

5. Měření základních charakteristik záznamu zvukových signálů na CD, DVD a SACD

6. Parametry analogového záznamu zvuku, analýza a měření

7. Restaurování archivních nahrávek, odstranění typických artefaktů - zvukový editor

8. Implementace algoritmů detekce a odstraňování impluzního rušení - Matlab

9. Implementace algoritmů odstraňování širokopásmového šumu - Matlab

10. Exkurze - výroba hudebních nosičů

11. Měření parametrů záznamu obrazu

12. Digitalizace a restaurace obrazových záznamů

13. Workshop archeologie AV záznamů

14. Prezentace výsledků, zápočet

Study Objective:

Students acquire knowledge on fundamentals and applications of AV signal processing, recording and restoration

Study materials:

Recommended literature:

[1] Godsill, S.J. - Rayner P. J. W.: Digital Audio Restoration, Springer London, 1998.

[2] Eargle, J.: Handbook of recording engineering, Springer, 2005.

[3] Kokaram, A.: Motion Picture Restoration - Digital Algorithms for Artefact Suppression, Springer, 2004.

[4] Enticknap, L.: Film Restoration: The Culture and Science of Audiovisual Heritage, Palgrave Macmillan, 2013.

[5] Tekalp, M.: Deep Learning for Image/Video Restoration and Super-Resolution, Now Publishers, 2022.

[6] Read, P., Meyer M-P.: Restoration of Motion Picture Film, Butterworth-Heinemann, 2005

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: