INFORMATION RECORDING AND REPRODUCING DEVICE

摘要

An information recording and reproducing device has a first recording clock generation circuit (106) which generates a clock based on pre-recorded information on a magneto-optical disk (101), a second recording clock generation circuit (107) and a switching circuit (117). The switching circuit (117) selects a first recording clock (e) when recording information is of discrete information (j) and selects a second recording clock (f) when recording information is of successive information (i). Moreover, in the present device, a first reading clock (fr) is used as well as a second clock (fr min ) as a clock for reading out the reproduced data from the magneto-optical disk (1), which had been once stored in memory (15). The second reading clock having a reference frequency is generated by a second clock generation circuit (11) and is used for reading out successive information such as music information. The first reading clock in synchronisation with the reproduced signal is generated by a first reading clock generation circuit (9) and is used for reading out discrete information such as computer-use data. In addition, in the case of discrete information, it is possible to start the recording/reproducing operation immediately after an optical head reaches a desired position, thereby permitting a shortened access time.