Matsushita Electric Industrial Co., Ltd.

Nippon Hoso' Kyokai

Sigekazu Togashi

Kunio Sekimoto

Yoshinobu Oba

Tadashi Nakayama

Toshihiro Uehara

Yasunori Kawakami

Kunio Suesada

Mikio Fujiwara

Hotaka Minaguchi

Kunjo Suesada

A recording apparatus of the present invention includes selective guard adding means for predicting, at the time of editing, positions of adjacency of new tracks to previously recorded tracks obtained at the time of completion of new track recording, and adds, at the time of editing, guards to locations where disturbance due to residue of erasing of the same azimuth might occur in order to remove or reduce the disturbance due to residue of erasing of the same azimuth caused at the editing point. When performing reproduction from a recording medium whereon tracks recorded by heads of at least two kinds of azimuth angles are disposed alternately and a plurality of tracks are handled as one recording unit and recorded, a reproducing apparatus of the present invention is so configured that the center of each of heads located at both ends of reproducing heads may be shifted to the inside as compared with each corresponding recording track. When disturbance due to the residue of erasing of the same azimuth occurs at the editing point, therefore, more signals of tracks to be originally reproduced can be reproduced, resulting in a greater resistance to disturbance of the same azimuth.

Magnetic reproducing apparatus and magnetic recording and reproducing

Magnetic reproducing apparatus and magnetic recording apparatus with

A digital signal recording/reproducing system specifically has an adaptive automatic equalizer for performing automatic waveform equalization disposed in a reproducing circuit of an RF system. In order to provide a run-up pattern which enables stable operation settlement of the adaptive automatic equalizer and a clock reproducing PLL at the time of reproduction, the digital signal recording/reproducing system comprises a run-up code generator for producing a run-up pattern composed of a combination of at least two digital value series of different inversion intervals. Thus, since an optimum run-up pattern for the reproducing circuit of the RF system is produced and recorded on a recording medium within a fixed period at the time recording, stable settlement of the operation of the clock reproducing PLL and the adaptive automatic equalizer is attained within a run-up period at the time of reproduction, thereby making it possible to suppress occurrence of a code error to a minimum.

Digital signal recording/reproducing system

Growing community of inventors

Katano, Japan

Sigekazu Togashi