Data recording and repoducing device

Abstract

Abstract PURPOSE:To increase the width of a main track in order to improve the sound quality and to facilitate easy production of a fixed head, by recording alternately the 1st and 2nd data groups containing auxiliary data different in bit rate to a single piece of auxiliary track in time division. CONSTITUTION:The 1st auxiliary signal S-AMS which must be reproduced in both fixed speed and high speed modes is supplied to a generator 9 for the 1st auxiliarty data AMS via a terminal 7. While the 2nd auxiliary signal S-SUB which must be reproduced only in a fixed speed mode is supplied to a generator 11 for the 2nd auxiliary data SUB which is converted in a bit rate shorter than the data AMS via a terminal 8. These obtained data AMS and SUB are encoded by a common encoder 12 and then applied with the digital modulation through a digital modulator 13. The 1st and 2nd auxiliary data groups D-AMS and D-SUB are recorded to an auxiliary track with relationship to a main digital code signal. In this cases, both data groups undergo previously the digital modulation and signal processing. A reproduction system 10B has a reverse signal operation to a record system 10a.

Inventors

• 👤 Jun Nakai
• 👤 中井　純
• 👤 Hidekazu Osawa
• 👤 大沢　英一
• 👤 Mamoru Yoshizawa
• 👤 吉沢　護

Bibliographic Details