Disc reproduction device and method

Abstract

There are provided a disc reproduction device and a reproduction method capable of promptly reproducing a sound at an arbitrary position on the disc when the reproduction is requested, without providing complicated switching means. The disc reproduction device includes access means for accessing a disc and access control means for controlling the access means to an arbitrary position on the disc. The disc reproduction device further includes: storage means divided into a first area for storing at least one audio data of a particular length of at least one track and a second area for storing remaining audio data of the one track; write-in means for accessing the disc, writing the audio data of the particular length starting at an arbitrary position of the one track in the first area, and writing the remaining audio data in the second area during reproduction of the audio data of the particular length; and read-out means for continuously reading out the audio data of the particular length and the remaining audio data.

Description

technical field [0001] The present invention relates to a disc playback device and a method for playing back a disc. Background technique [0002] Next, a technique for playing back audio data recorded in a conventional optical disc will be described. figure 1 A structural block diagram of a conventional optical disc playback device is shown. [0003] exist figure 1 In this case, the laser beam irradiated on the optical disc 1 is reflected by the optical disc 1 and reaches an optical pickup 3 via a lens 2 . The laser beam that has arrived is converted into an electrical signal by the optical pickup 3; and the converted electrical signal is amplified by a head amplifier 4 to be synthesized into a focus error signal and a tracking error signal. [0004] The focus error signal and the tracking error signal are input to the servo and signal processing LSI 5 . The servo and signal processing LSI 5 performs focus servo processing according to the focus error signal. The contr...

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Problems solved by technology

[0010] However, the above-mentioned optical disc playback device with the conventional structure has such a problem that a jump operation of the optical pickup to the target position is required every time a request for searching the head of a specific track is issued; and, when the current position and the target position are separated, , the skip operation is time consuming, thereby generally causing a delay from issuing a head seek request until outputting the audio data for such a head seek

[0012] However, the track head search according to JP-A-2002-100123 also involves a problem: although the audio data used for head search in a plurality of channels is stored in the memory, when a head search for a specific track is issued, audio data different from that used in the head search for a specific track is erased when requesting a head search

Therefore, the disc playback apparatus is complicated in terms of arranging the switching means; and in fact, difficulty has been encountered in performing switching of sound playback while maintaining high audio quality.

[0014] Furthermore, since each of the techniques described in JP-A-2002-100123 and JP-A-7-176174 is limited to the head search of the audio track, audio data at an arbitrary position, such as an AB repeating pattern, is to be output therein. Difficulties have been encountered using the above method in cases such as

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