Funai Electric Company Ltd.

Shunsuke Sehara

Yasunori Kuwayama

A DSP of the DVD recorder includes a balance value setting portion for determining an appropriate value of a focus balance value &#x3b1; when information is reproduced from an optical disc so as to record the determined focus balance value &#x3b1;in a balance value storing portion and to set the same in a first amplifier of a focus error signal generating circuit, and a correction executing portion for reading the focus balance value &#x3b1;stored in the balance value storing portion when information is recorded in the optical discso as to correct the read value to be a focus balance value &#x3b1;, which is set in the first amplifier of the focus error signal generating circuit.

Optical disc recording and reproducing apparatus

A DSP of a DVD recorder includes: a gain setting portion determining appropriate values of a first gain &#x3b1; and a second gain &#x3b2; when playback of an optical disc is performed, recording the first gain &#x3b1; and the second gain &#x3b2; thus determined in a gain storing portion, and setting them in a main differential amplifier and a sub differential amplifier, respectively; and a correction performing portion reading, when recording on the optical disc is performed, the first gain &#x3b1; and the second gain &#x3b2; stored in the gain storing portion, correcting at least one of them, and setting them in the main differential amplifier and the sub differential amplifier, respectively.

Growing community of inventors

Osaka, Japan

Shunsuke Sehara