Headroom Extension for Slow-Speed Magnetic Recording of Audio

Gundry KJ. Headroom Extension for Slow-Speed Magnetic Recording of Audio. In: AES Convention 64. Audio Engineering Society; 1979. Paper 1534. Available from: https://aes.org/publications/elibrary-page/?id=2820

@inproceedings{Gundry1979_2820,
  author = {Gundry, Kenneth J.},
  title = {{Headroom Extension for Slow-Speed Magnetic Recording of Audio}},
  booktitle = {AES Convention 64},
  note = {Paper 1534},
  year = {1979},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=2820}
}

TY  - CPAPER
TI  - Headroom Extension for Slow-Speed Magnetic Recording of Audio
AU  - Gundry, Kenneth J.
T2  - AES Convention 64
M1  - Paper 1534
PY  - 1979
DA  - 1979/11/06
UR  - https://aes.org/publications/elibrary-page/?id=2820
PB  - Audio Engineering Society
LA  - en
AB  - Slow-speed recording (e.g., cassette) has a poor overload level at high frequencies relative to middle frequencies. The recording bias current and equalization are compromises between high frequency saturation and other aspects of performance (distortion, drop-outs, modulation noise, etc.). This paper describes a system, called headroom extension, which continuously adapts the recording bias and equalization to suit the high frequency spectrum of the input signal, as determined by the control circuitry of the Dolby B-Type noise reduction processor. An optimum type of controlled equalization for this purpose is presented. Application of the headroom extension system to cassette recording results in a high frequency signal handling capability improvement on the order of 10 dB above 10 kHz.
ER  -