Patent ID: 6694091
Filing Date: 2004-02-17
Classification: H04N

Abstract:
An optical recording and reproducing apparatus to record and reproduce an optical signal on/from a disk, comprising:a pick-up unit to pick up the optical signal from the disk; an RF AMP to convert optical signal generated by the pick-up unit into an electrical signal and extract a servo signal and modulated data therefrom; a digital signal processor to output a compressed A/V data stream by demodulating the modulated data; a servo unit to receive information from the RF AMP required for controlling a servo, to control the servo; an AV codec to decode the compressed A/V data stream, to output an A/V data stream including a plurality of audio data streams; a key input unit to input a key input of a user to change recording and reproducing of programs having sub-audio data streams on/from the disk; and a system controller to perform user interfacing through the key input unit and to control the pick-up unit, the RF AMP, the digital signal processor, the servo unit and the AV codec; wherein the system controller searches whether there is a sub-audio data stream having a same channel ID as a channel ID assigned to a sub-audio data stream of one program which was reproduced before the program was changed in the changed program when the one program is changed to another program, and selects the sub-audio data stream having the same channel ID as the channel ID assigned to the sub-audio data stream of the one program which was reproduced before the program was changed in the changed program upon a successful search.