JP2000339843A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a data transfer rate by performing efficient buffering processing. SOLUTION: This is an optical disk device provided with a plural optical pickups for detecting information signals from an optical disk, decoders 5 for decoding and reproducing the information, a data temporary storage area 14 for temporarily storing information a CPU. This device includes a data address data size detecting means 12 for detecting the leading address and the data size of the reproduced information, and a data transfer means 13 for transferring the reproduced information to a pre-secured normal storage area 15, and has an address calculating means 18 for calculating the address on an optical disk where the reproduced information has been recorded based on the data address data size, and stores the reproduced information in the data temporary storage area 14 and also transfers the information to the normal storage area 15 by the means 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device which is connected to a computer or the like and records / reproduces data using light.

[0002]

2. Description of the Related Art In a conventional optical disk apparatus having a plurality of optical pickups, in order to store data read independently from each optical pickup at an appropriate absolute address in a buffer memory, the data is read from each optical pickup. After calculating the absolute address corresponding to the obtained data, buffering processing to the buffer memory has been performed.

FIG. 3 is a configuration diagram of a conventional optical disk device. Here, in order to simplify the description, a system having two optical pickups will be described as an example. In FIG. 3, reference numeral 1 denotes an optical disk on which information is recorded, 2 denotes an optical pickup, and an objective lens for condensing a laser beam on the recording surface of the optical disk 1 and a direction perpendicular to the surface of the optical disk 1 (see FIG. 3). A focus actuator for moving in the focus direction (hereinafter referred to as a focus direction), a track actuator for moving in the radial direction of the optical disc 1 (hereinafter referred to as a tracking direction), various prisms including a semiconductor laser, and a signal detection detector are integrally formed. Have been. Reference numeral 3 denotes an RF signal detector that generates an analog RF signal or a servo signal from the output of the optical pickup 2, 4 denotes an RF signal slicer that generates a digital RF signal (data signal) from the analog RF signal, and 5 denotes an output of the RF slicer 4. A decoder 6 for demodulating data, 6 is a data control unit for controlling reading and writing of decoded data from each optical pickup 2 to the buffer memory 9, and 7 is a head movement control for controlling movement of each optical head. Unit 10 is host computer 1
1 is a central control unit (CPU) for controlling the entire system in response to a request from

Next, a reading method in the case of using two optical pickups will be described. First, in response to a data read request from the host computer 11, the CPU 10 moves each optical pickup to each read start position by the head movement control unit 7, and starts reading signals after synchronization is established. Each signal read independently is detected by the RF signal detector 3 as an analog RF signal. The analog RF signal is converted into a digital RF signal by the RF signal slicer 4 to generate a data signal. The digital RF signal is demodulated by the decoder 5 and passed to the data controller 6. The data control unit 6 receives data signals read from each head independently, calculates an absolute address in the buffer memory 9 that is a temporary storage location corresponding to each data, and then stores the data in the buffer memory 9 in ascending order.
The data is stored in. The CPU 10 transmits the stored data to the host computer 11 as a host.

[0005]

However, in the conventional configuration as described above, it takes time to calculate the absolute address, which is the storage location of each data input in parallel from each optical head. Has been interrupted, and the process of storing data in the buffer memory 9 has not been performed efficiently.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide an optical disk apparatus capable of performing an efficient buffering process in data transfer to a buffer memory and securing a data transfer rate. Aim.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and irradiates a laser beam to an optical recording medium, detects reflected light, and transmits an information signal from the optical recording medium. Optical pickup for detection, decoding means for demodulating the information signal to reproduce the information, buffer storage means for temporarily storing the reproduced information, flow of the reproduced information corresponding to the host computer and the entire apparatus An optical disc apparatus having control means for controlling the operation of the data processing apparatus, wherein the control means comprises: a data address data size detection means for detecting a head address and a data size of reproduced information; And a transfer unit for transferring the reproduced information to the storage area of No. 2 in which the reproduced information is recorded based on the detection result of the data address data size detecting unit. Address calculation means for calculating an address on the dynamic recording medium, the control means stores the reproduced information in the buffer storage means, and stores the information reproduced by the transfer means based on the calculation result of the address calculation means. 2 is an optical disk device characterized in that the data is transferred to a second storage area.

The data read from the optical pickup is immediately stored in the buffer storage means, the absolute address is calculated, transferred to the second storage area, and transmitted to the host computer from the second storage area. In addition, the present invention eliminates interruption of data transfer to the host computer due to the absolute address calculation processing, so that efficient buffering processing can be performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides an optical pickup for irradiating an optical recording medium with a laser beam and detecting reflected light to detect an information signal from the optical recording medium; Decoding means for demodulating a signal and reproducing information;
An optical disc device having buffer storage means for temporarily storing reproduced information and control means for controlling a flow of reproduced information and an operation of the entire apparatus corresponding to a host computer, wherein the control means comprises: A data address data size detecting means for detecting a head address and a data size of the reproduced information; and a transfer means for transferring the reproduced information to a second storage area secured in advance in the buffer storage means. An address calculation unit for calculating an address on the optical recording medium on which the reproduced information is recorded based on the detection result of the detection unit, and the control unit stores the reproduced information in the buffer storage unit. The information reproduced by the transfer means based on the calculation result of the address calculation means is transferred to the second storage area. An optical disk apparatus.

The data read from the optical pickup is immediately stored in the buffer storage means, the absolute address is calculated, transferred to the second storage area, and transmitted to the host computer from the second storage area. In addition, the present invention eliminates interruption of data transfer to the host computer due to the absolute address calculation processing, so that efficient buffering processing can be performed.

According to a second aspect of the present invention, there is provided the optical disk apparatus according to the first aspect, wherein the optical disk apparatus has a plurality of sets of optical pickups and decoding means. More efficient buffering processing can be performed using a plurality of optical pickups.

According to a third aspect of the present invention, the control means sends information from the second storage area to the host computer while the transfer means transfers the reproduced information. An optical disc device according to claim 1 or claim 2. Since the data read from the optical pickup is immediately stored in the buffer storage means, the absolute address is calculated and transmitted to the host computer from the transferred second storage area to the host computer by the absolute address calculation processing. This eliminates the interruption of data transfer, and enables efficient buffering processing.

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an optical disk device according to Embodiment 1 of the present invention. 1 is an optical disk, 2 is an optical pickup, 3 is an RF signal detector, 4 is an RF signal slicer, 5 is a decoder, 7 is a head movement control unit, 9 is a buffer memory, 10 is a central processing unit (CPU), and 11 is The host computer. The above circuit blocks have the same block configuration as the conventional one, and the same reference numerals are given to omit redundant description.

Further, reference numeral 16 denotes a data control unit, and reference numeral 18 denotes an address calculating means, which are constituent elements of the present invention. Next, features of the present invention will be described with reference to FIG.
FIG. 2 is a configuration diagram of the data control unit and the address calculation unit of FIG. 1, wherein 16 is a data control unit, and 18 is an address calculation unit.

The operation of the data control section 16 and the address calculation means 18 will be described below. Reference numeral 12 denotes a data address and data size detection unit, which detects the head address and data size of data sent from each optical head. Reference numeral 13 denotes a data transfer unit, and the address calculation unit 1
After obtaining the absolute address obtained in step 8, the data temporarily stored in the buffer memory 9 is transferred to the normal storage area 15 in the buffer memory 9. Here, the absolute address refers to an address in which data is arranged in the order of addresses in the memory space of the medium. Therefore, the normal storage area 15 is stored in the order of the media data addresses. That is, the data transfer means 13, the data temporary storage area 14, and the normal storage area 15 have a FIFO function as a whole.

The data input to the data control unit 16 is written to a temporary data storage area 14 corresponding to each optical pickup 2. While the data write operation to the data temporary storage area 14 is being performed, the data address and data size detection unit 12 extracts the data address information and the data size of each data sent from each optical pickup 2, and The data address information and the data size information are passed to the calculating means 18.

The address calculating means 18 calculates from the data address information and the data size information which address in the normal storage area 15 in the buffer memory 9 to start storing (calculation of the absolute address), and the data transfer means 13
Performs a data transfer process from the temporary data storage area 14 to the normal storage area 15. Here, the processing time required for the transfer processing will be examined. Generally, optical pickup 2
The time required to write the data obtained from the data into the temporary data storage area 14 is much shorter than the time required to calculate the absolute address and transfer the data from the temporary data storage area 14 to the normal storage area 15. Accordingly, the data obtained from the optical pickup 2 can be transferred from the temporary data storage area 14 to the normal storage area 15 in parallel while writing the data to the temporary data storage area 14.

Further, the time required for the transfer to the normal storage area 15 is much shorter than the time required for calculating the absolute address and the memory size from the normal storage area 15 and transmitting the calculated address to the host computer 11. Therefore, the normal storage area 15
, And can be transmitted to the host computer 11 in parallel.

In this way, writing, transfer, and transmission can be performed in parallel, and efficient buffering processing can be performed. Incidentally, even if the number of optical pickups is three or more, it is possible to easily cope with the same method by increasing the memory capacity, that is, the number of FIFO stages.

[0020]

As described above, according to the present invention, in a disk device having a plurality of optical pickups, a temporary data storage area corresponding to a plurality of optical pickups is provided in a buffer memory in advance. The data read from the optical pickup is immediately stored in the data storage area, this transfer time is allocated to the address calculation processing, and after the absolute address is determined, the data is transferred from the temporary data storage area to the absolute address of the normal storage area. In this way, it is possible to realize an optical disk apparatus that can eliminate the interruption of data transfer due to the absolute address calculation processing, perform efficient buffering processing, and secure a data transfer rate.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an optical disk device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a data control unit and an address calculation unit of FIG. 1;

FIG. 3 is a configuration diagram of a conventional optical disk device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 optical disk 2 optical pickup 3 RF signal detector 4 RF signal slicer 5 decoder 6, 16 data control unit 7 head movement control unit 8, 18 address calculation means 9 buffer memory 10 CPU (central processing unit) 11 host computer 12 data address , Data size detector 13 data transfer means 14 data temporary storage area 15 normal storage area

Claims (3)

[Claims] 1. An optical pickup for irradiating a laser beam onto an optical recording medium and detecting reflected light to detect an information signal from the optical recording medium, and decoding means for demodulating the information signal and reproducing information. An optical disk device comprising: buffer storage means for temporarily storing reproduced information; and control means for controlling a flow of reproduced information and an operation of the entire apparatus corresponding to a host computer, wherein the control means Comprises a data address data size detecting means for detecting a head address and a data size of the reproduced information, and a transferring means for transferring the reproduced information to a second storage area previously secured in the buffer storage means, Address calculation for calculating an address on the optical recording medium on which information reproduced on the basis of a detection result of the data address data size detection means is recorded. Has a step, said control means stores the reproduction information in the buffer memory means, said address calculation means and the second information reproduced by said transfer means based on the calculation result of
An optical disc device, wherein the data is transferred to a storage area. 2. An optical disk device according to claim 1, wherein said optical pickup device comprises a plurality of sets of said optical pickup and said decoding means. 3. The control unit according to claim 1, wherein the control unit sends information from the second storage area to a host computer while the transfer unit transfers the reproduced information. 2. The optical disc device according to 2.