Non Contact Phonographic Disks Digitisation Using Structured Colour Illumination

Chenot JH, Laborelli L, Perrier A. Non Contact Phonographic Disks Digitisation Using Structured Colour Illumination. In: AES Convention 122. Audio Engineering Society; 2007. Paper 7009. Available from: https://aes.org/publications/elibrary-page/?id=13994

@inproceedings{Chenot2007_13994,
  author = {Chenot, Jean-Hugues and Laborelli, Louis and Perrier, Alain},
  title = {{Non Contact Phonographic Disks Digitisation Using Structured Colour Illumination}},
  booktitle = {AES Convention 122},
  note = {Paper 7009},
  year = {2007},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13994}
}

TY  - CPAPER
TI  - Non Contact Phonographic Disks Digitisation Using Structured Colour Illumination
AU  - Chenot, Jean-Hugues
AU  - Laborelli, Louis
AU  - Perrier, Alain
T2  - AES Convention 122
M1  - Paper 7009
PY  - 2007
DA  - 2007/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13994
PB  - Audio Engineering Society
LA  - en
AB  - We propose an innovative contactless optical playing device for 78rpm and 33rpm lateral modulation phonographic disks, using structured colour illumination. An area of the disk is illuminated by a beam of rays, with colour depending on the direction of incidence, that are reflected by the groove wall towards a camera image. In contrast with standard methods, that measure the velocity of the groove at a single location, direct access to the audio signal value is obtained here directly from pictures through colour decoding, and the whole height of the groove wall is exploited. This colour coding allows for the detection of occluding dust, and automated interpolation of missing audio signal. Results on distortion, S/N ratio, and bandwidth are presented.
ER  -