WO2008056424A1

WO2008056424A1 - Streaming data reproduction program and optical disc drive device

Info

Publication number: WO2008056424A1
Application number: PCT/JP2006/322485
Authority: WO
Inventors: Haruyasu Sakata; Takahiro Okoge
Original assignee: Pioneer Corporation
Priority date: 2006-11-10
Filing date: 2006-11-10
Publication date: 2008-05-15
Also published as: JPWO2008056424A1; JP4576460B2; CN101536100B; CN101536100A

Abstract

A streaming data reproduction program is provided with a function for issuing information readout command to an optical disc drive device (READ 12 command issuing function (f1)), a function for saving streaming data received from the optical disc drive device (1) (streaming data saving function (f2)), a function for decoding the saved streaming data (streaming data decoding function (f3)), a function for displaying reproduced streaming data (streaming data displaying function (f4)), a function for monitoring a data amount of the saved streaming data (streaming data amount monitoring function (f5)), and a function for switching a streaming data bit value in response to the data amount of the stream data (streaming data bit switching function (f6)).

Description

Specification

Streaming data playback program and optical disk drive

Technical field

[0001] The present invention relates to a streaming data reproduction technique for reproducing streaming data.

Background art

In recent years, an optical disk (for example, a DVD) mounted on an optical disk drive has a device configuration in which a host computer (for example, a personal computer) and an optical disk drive (for example, a DVD drive) are connected. ) DVD-Video data may be played back and viewed.

[0003] Here, when the interface between the host computer and the optical disk drive is ATAPI (AT attachment packet interface), a READ10 or READ12 command is used as an instruction to read data from the host computer. Specifically, when the optical disk drive receives a READ 10 or READ 12 command issued by the host computer, the optical disk drive reads the data recorded on the optical disk in accordance with various parameters of the READ 10 or READ 12 command. It is supposed to be transferred to.

[0004] In such a READ12 command, a streamer bit is one of the parameters. Streamer davit is a parameter that indicates whether or not to perform real-time playback, and streamer dabit “1” indicates that real-time playback is performed (mainly means streaming data for which real-time performance is required. Indicates video data and audio data), and streamer bit “0” indicates that real-time playback is not performed (meaning other than streaming data).

[0005] Currently, among optical disk drive apparatuses, there are known optical disk drive apparatuses that operate differently at the time of a data read error (hereinafter referred to as a read error) in accordance with the value of the streamer bit. Specifically, when the streamer bit is 0, this optical disc drive device sets a larger number of retries and a longer time-out period at the time of a read error, and rereads data (hereinafter referred to as read retry). )I do. And all the lead tries are errors If this happens, notify the host computer that the READ12 command has failed. On the other hand, if the streamer bit is 1, set a smaller number of retries and a shorter timeout period when a read error occurs, and perform a read retry to shorten the read retry time. Even if all of the read retries become errors, the host computer is not notified that the READ 12 command has become an error, but is notified of normal termination.

[0006] Note that prior art documents related to the above description include the following.

[0007] Patent Document 1: JP 2003-51123 A

Patent Document 2: JP-A-2005-149686

Disclosure of the invention

Problems to be solved by the invention

Conventionally, when playing back DVD-Video data recorded on an optical disc with the above-described device configuration, the playback operation is executed while the value of the streamer bit of the READ12 command is fixed to 0 or 1. It was.

[0009] For this reason, when a read error occurs due to scratches or dirt on the optical disk, there is a problem that the reproduced image stops or the reproduced image is disturbed.

In other words, since the data reading process of the optical disc is usually faster than the data reproduction speed, a technique is used in which the read data is sequentially stored in the memory in the host computer before reproduction. If a read error occurs when the davit value is always 0, even if the DVD-Video data transferred to the host computer is depleted, a larger number of retries and a longer timeout period are set to perform a read retry. Therefore, there is a problem that it takes time to read out data and the reproduced image stops.

[0011] Also, if a read error occurs when the value of the streamer bit is always 1, even if the DVD—Video data transferred to the host computer is sufficiently stored, a smaller number of retries and a shorter timeout Since the read retry is performed after setting the time, there is a problem that the reproduced image is disturbed without reading data that can be read originally.

[0012] The present invention has been made to solve the above-described problem. As an example of the problem, streaming data that can prevent image stoppage and image disturbance when a read error occurs is provided. To provide a reproduction program and an optical disk drive. Means for solving the problem

[0013] In order to achieve the above object, the streaming data reproduction program according to claim 1 transmits an information read command to an optical disc driving apparatus mounted with an optical disc, and is recorded on the optical disc from the optical disc driving apparatus. A computer-readable streaming data reproduction program that receives streaming data and reproduces the streaming data, the data storage step for storing the received streaming data in a predetermined storage unit, and the predetermined storage A data reproduction step for reproducing the streaming data stored in the storage unit, a data amount monitoring step for monitoring the data amount of the streaming data stored in the predetermined storage unit, and the data monitored in the data amount monitoring step Based on quantity A parameter setting step for switching a parameter value indicating whether to perform real-time reproduction of the information read command; and the information read command including the parameter set in the parameter setting step. And a command transmission step of transmitting to the computer.

[0014] Further, the optical disk drive apparatus according to claim 4 reads data recorded on the mounted optical disk based on an information read command transmitted from the computer, and transmits the read data to the computer. An optical disk drive device, wherein a reading error occurs when reading the data, and the value of the parameter indicating whether or not to perform the real-time reproduction of the information reading command. A first retry means for setting the number of retries in advance and a time-out period for the first time set in advance, and a first retry means for performing the data re-read operation, and a read error at the time of reading the data. Parameter value indicating whether or not real-time playback of the information read command is performed If the value is to perform real-time playback, set the number of retries to a second number less than the first number, and set the timeout time to a second time shorter than the first time. And a second retry means for performing a re-reading operation.

Brief Description of Drawings

FIG. 1 is a schematic configuration diagram of an optical disc playback system according to an embodiment of the present invention. FIG. 2 is a functional block diagram showing functions of a control unit of the host computer of the optical disc reproducing system according to the embodiment of the present invention.

FIG. 3 is a sequence diagram showing an operation of the optical disc reproduction system according to the embodiment of the present invention.

FIG. 4 is a flowchart showing in detail a data read instruction process in step S 100 of FIG.

FIG. 5 is a flowchart showing in detail a data read process in step S200 of FIG.

FIG. 6 is a flowchart showing in detail the read error process in step S500 of FIG.

FIG. 7 is a flowchart showing in detail the data reproduction process in step S600 of FIG. Explanation of symbols

1 Optical disk drive

2 Host computer

3 Optical disc

10 Optical disc playback system

101 Pickup section

102 Signal processor

103, 205 Control unit

104 Drive unit

105, 204 IZF

201 Operation unit

202 Display

203 Memory

fl READ 12 command issue function

f2 Streaming data storage function

f3 Streaming data decoding function

Ϊ4 Streaming data display function

f5 Streaming data volume monitoring function

f6 Streamer david switching function BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of an optical disc playback system 10 according to an embodiment of the present invention. An optical disc playback system 10 shown in FIG. 1 is composed of an optical disc drive 1 and a host computer 2, and the optical disc drive 1 reads the streaming data recorded on the optical disc 3 in response to a request from the host computer 2. The host computer 2 plays back the read streaming data. Note that in this embodiment, streaming data refers to video data and audio data that require real-time performance.

The optical disk drive device 1 is specifically assumed to be, for example, a DVD (Digital Versatile Disc) drive device, and includes a pickup unit 101, a signal processing unit 102, a control unit 103, a drive unit 104, and an interface (hereinafter referred to as “optical disc drive device”). , Called IZF) 105.

[0020] The pickup unit 101 is an optical pickup that reads a signal recorded on the mounted optical disc 3, and irradiates the optical disc 3 with a laser beam and converts the reflected light into an electric signal, thereby converting the signal processing unit. Output to 102.

[0021] The signal processing unit 102 performs waveform shaping processing, noise removal processing, digital conversion processing, and the like on the electric signal, and outputs a reproduction signal to the control unit 103.

The control unit 103 is configured to control the entire apparatus in response to an instruction regarding data reproduction from the host computer 2. For example, a drive signal for rotation control of the optical disc 3 and a drive signal for movement control (focus control and tracking control) of the pickup unit 101 are generated and output to the drive unit 104.

The drive unit 104 controls the rotation of the optical disc 3 and moves the pick-up unit 101 based on the drive signal.

[0024] The IZF unit 105 is an interface connected to the host computer 2 that gives instructions regarding data reproduction.

[0025] For example, the host computer 2 is specifically assumed to be a personal computer (hereinafter referred to as a personal computer) or the like, and includes an operation unit 201, a display unit 202, a storage unit 203, an interface (hereinafter referred to as IZF). 204 and a control unit 205. The operation unit 201 includes a plurality of keys for inputting numbers, characters, operation instructions, and the like, and outputs an operation signal corresponding to these key operations to the control unit 205.

The display unit 202 includes a display medium that displays information such as a liquid crystal display panel and a CRT display, and a drive circuit that performs display control of the display medium.

[0028] The storage unit 203 is specifically composed of ROM and RAM, a hard disk drive (hereinafter referred to as HDD), and the like, and stores various programs executed by the control unit 205, various data, and the like. Yes. For example, in the present embodiment, there is stored a streaming data reproduction program for controlling the optical disk driving device 1 to read the streaming data recorded on the optical disk 3 and reproduce the read streaming data. In addition to being stored in the storage unit 203, this streaming data playback program can be recorded on a computer-readable recording medium such as a flash memory, CD-ROM, MO, DVD-ROM, etc. via a communication network. Distribution is also possible.

[0029] The IZF 204 controls communication performed between the host computer 2 and the optical disc recording apparatus 1.

[0030] The control unit 205 is configured to control each unit of the apparatus, transmit data, perform various operations, temporarily store data, and the like. The control unit 205 of the present embodiment realizes a streaming data playback function by executing the above-described streaming data playback program. Here, the streaming data playback function will be described with reference to FIG. FIG. 2 is a functional block diagram showing in detail the streaming data playback function of the present embodiment.

[0031] READ12 command issue function fl is a function for issuing an information read command (referred to as a READ12 command) to the optical disk drive 1, and when the optical disk drive 1 receives the REA D12 command, it follows the contents of the READ12 command. The streaming data recorded on the optical disc 3 is read. Here, the parameters of the READ12 command include the start address of the data to be read, the length of the data to be read, and the streamer bit. Streamminder bit is a parameter indicating whether or not to perform real-time playback, and streamminder bit “1” indicates that real-time playback is performed (mainly means streaming data that requires real-time performance, and is concrete. Includes video and audio data. Streamminder bit “0” indicates that real-time playback is not performed (meaning other than streaming data).

[0032] The streaming data storage function f2 is a function for issuing a READ12 command and temporarily storing the streaming data received from the optical disc drive device 1 in the storage unit 203 (for example, RAM).

[0033] Streaming data decoding function f3 refers to a function of decoding streaming data stored in the storage unit 203.

Streaming data display function f4 is a function for displaying the decoded streaming data (image data) on the display unit 202.

Streaming data amount monitoring function f5 is a function for monitoring the data amount of streaming data stored in the storage unit 203.

[0036] The streamer bit switching function f6 is a function that receives information related to the data amount of the streaming data monitored by the streaming data amount monitoring function f5, and switches the value of the streaming bit. When the amount of data is less than or equal to a predetermined threshold, the streamer bit value is set to 1, and when the data amount exceeds the predetermined threshold, the streamer bit value is set to 0. That is, in the present embodiment, the value of the streamer bit is not dynamically set, but is set dynamically according to the amount of stored streaming data. Further, as will be described later, when the streamer bit is 0, the optical disk drive 1 of the present embodiment sets a larger number of retries and a longer time-out period at the time of a read error, and reads the data. On the other hand, if the streamer bit is 1, a smaller number of retries and a shorter timeout time are set at the time of a read error, so that read retries are performed, so the amount of stored data is small When a read error occurs, the optical disc drive 1 is instructed to perform a retry retry in a short time, and when there is a sufficient amount of stored data (for example, streaming data for several tens of seconds is stored). When a read error occurs, the read re-trigger takes a longer time than when the streamer bit is 1. The optical disk drive 1 is instructed to perform the operation.

Next, using FIG. 3 to FIG. 7, the operation of the optical disc playback system 10 according to the present embodiment Will be described. Here, FIG. 3 is a sequence diagram showing an operation in which the optical disc reproducing system 10 reproduces the streaming data recorded on the optical disc 3. 4 is a flowchart showing in detail the data read instruction process in step S100 in FIG. 3, FIG. 5 is a flowchart showing in detail the data read process in step S200 in FIG. 3, and FIG. 6 is a flowchart of step S500 in FIG. FIG. 7 is a flowchart showing in detail the read error process, and FIG. 7 is a flowchart showing in detail the data reproduction process in step S600 of FIG. When the streaming data playback of the optical disc playback system 10 is started, the optical disc driving device 1 reads the streaming data for several seconds and stores it on the host computer 2 to start playback. The operation of the optical disc playback system 10 to be described is for explaining the operation in the steady state after the streaming data playback start state has elapsed.

First, with reference to FIG. 3, an operation of reproducing the streaming data recorded on the optical disc 3 by the optical disc reproduction system 10 will be described.

[0039] The host computer 2 instructs the optical disk drive device 1 to read the streaming data recorded on the optical disk 3 (step S100). Here, the data read instruction process in step S100 will be described in detail with reference to FIG.

[0040] The host computer 2 detects the amount of streaming data stored in the storage unit 203 (step S110), and determines whether the amount of streaming data is equal to or less than a predetermined threshold (step S110). Step S 120). When the amount of streaming data is less than or equal to a predetermined threshold, the streamer bit is set to 1 (step S130), and when the amount of streaming data exceeds the predetermined threshold, the streamer bit is set. Is set to 0 (step S 140).

[0041] Next, the host computer 2 transmits a READ 12 command including the value of the streamer bit set in step S130 or step S140 to the optical disc drive 1 (step S150). Note that the start address (read location) of the data to be read included in the READ12 command is set to the location next to the read location instructed last time.

Next, returning to FIG. 3, the optical disk drive 1 receives the R transmitted from the host computer 2. When the EAD12 command is received, the streaming data recorded on the mounted optical disk 3 is read according to the READ12 command (step S200). Here, the data read process in step S200 will be described in detail with reference to FIG.

[0043] The optical disk drive 1 receives the READ12 command from the host computer 2 (Step S210), and determines whether or not the force 1 is the value SO of the streamer bit included in the READ12 command (Step S210). S220). If the value of the streamer bit is 1, the read retry parameters (retry count A1 and timeout time T1) when the streaming bit is 1 are acquired (step S230). On the other hand, if the value of the stream minddabit is ^, the read retry parameters (retry count A2 (> A1) and timeout time T2 (> T1)) when the stream minddabit is 0 are acquired (step S240). . As described above, the optical disk drive 1 sets different parameters for the read retry depending on the value of the streamer bit. When the streamer bit is 0, the time required for the read retry is set longer. When the streammindabit is 1, the time required for retry is set shorter. As a result, when the streamer bit is 0, the optical disk drive 1 tries to read the accurate streaming data even if it takes a long time for the read retry. It works to let you.

Next, the optical disk drive 1 reads the streaming data according to the READ12 command (step S250).

Next, referring back to FIG. 3, the optical disc driving apparatus 1 determines whether or not the read error has occurred (step S 300). If a read error does not occur, the optical disk drive 1 sends the read streaming data to the host computer 2 (step S400). If a read error occurs, the optical disk drive 1 performs read error processing. (Step S500). Here, the read error processing in step S500 will be described in detail with reference to FIG.

[0046] The optical disk drive 1 determines whether or not the force 1 has a streamminder bit value of 0.

(Step S510). When the streamer bit value is 1, a retry is performed using basic parameters of the reading speed (for example, specifically, only 16 × speed and 8 × speed among the readable speeds) (step S520). ), When the value of streamer david is 0, Retry is performed using all the parameters (all readable speeds, specifically, for example, 16 × speed, 8 × speed, 5 × speed, and 2 × speed) (step S560).

[0047] When the retry is performed using the basic parameter of the reading speed, the optical disc driving device 1 determines whether or not the force has been read (step S530). Here, the determination as to whether or not the read has been possible is performed by determining whether or not the read is possible with the above-described read retry parameters (the number of retries A1 and timeout time T1) as the upper limit. In other words, in the read retry operation, when the number of retries reaches A1 or when the timeout time reaches T1, it is determined that the read cannot be performed. If the read is successful, the optical disk drive 1 sends the read streaming data to the optical disk drive 1 (step S540), and in step S550, which will be described later, the number of retries A1 and the timeout time T1 Is reset to a value smaller than the initial value, the number of retries A1 and the time-out time T1 for streamer bit 1 are reset to a larger value within a range not exceeding the initial value (step S545). ). For example, if the initial value of the retry count A1 is 8 and the retry count A1 is currently set to 6, set the next retry count A1 to 7 times. If the read-ready state continues, host computer 2 issues the streamer bit set to 0 in step S120 in Fig. 4, so that it is reset to a value smaller than the initial value in anticipation of this. It is also possible to keep the number of retries A1 and timeout time T1 from increasing. On the other hand, when the read cannot be performed, that is, when the read cannot be performed even if the read is retried, the optical disc drive 1 further reduces the retry count A1 and the timeout time T1 when the streaming value is 1. (Step S550). For example, if the retry count A1 is currently set to 8, the next retry count A1 is set to 6. Thus, in this embodiment, when the stream minder bit is 1 and the read retry fails, the read retry parameter value when the stream minder bit is 1 is set to be further reduced. It has become. As a result, when read errors occur continuously (usually, the location of scratches and dirt is often continuous), the reread retry is completed more quickly.

[0048] On the other hand, when retry is performed using all parameters of the reading speed, the optical disc driving device 1 determines whether or not the force has been read (step S570). Where did you lead? The determination as to whether or not is a determination as to whether or not the read could be performed with the above-described read retry parameters (retry count A2 and timeout time T2) as upper limits. In other words, in the read retry operation, when the number of retries reaches A2 or the timeout time reaches T2, it is determined that the read cannot be performed. If the read is successful, the optical disk drive 1 sends the read streaming data to the optical disk drive 1 (step S580). When the read is not possible, that is, when the read cannot be performed even if the read is retried. Ends read error processing.

Next, returning to FIG. 3, the host computer 2 reproduces the streaming data transmitted from the optical disk drive 1 (step S600). Here, the data reproduction processing in step S600 will be described in detail with reference to FIG.

[0050] The host computer 2 receives the streaming data transmitted from the optical disc driving device 1 (step S610), and stores the received streaming data in the storage unit 203 (step S620).

[0051] Next, the host computer 2 decodes the streaming data stored in the storage unit 203, and displays the streaming data via the display unit 202 (steps S630 and S640).

) o

Next, returning to FIG. 3, the host computer 2 determines whether or not the streaming data to be played back has ended (step S700). If the streaming data to be played back has not ended, the host computer 2 Returning to S100, the reproduction process is continued, and when the streaming data to be reproduced is completed, the process is terminated.

From the above, according to the optical disc reproduction system 10 according to the present embodiment, the value of the streamer bit is dynamically switched according to the data amount of the streaming data stored in the host computer 2. Since the READ12 command is issued, an appropriate reproduction process can be performed even if a read error occurs due to scratches or dirt on the optical disk 3. In other words, when the amount of stored streaming data is almost exhausted, the stream minder bit is set to 1 so that the optical disk drive 1 does not spend time on read retry. The image does not stop for a long time. In addition, there is streaming data up to several tens of seconds ahead because the amount of stored streaming data is large. In some cases, the streamminder bit is set to 0, and the optical disk drive 1 is allowed to spend enough time for read retry to acquire accurate streaming data, so that the reproduced image is not disturbed.

[0054] Although the embodiments and examples of the present invention have been described above, they do not depart from the gist of the present invention! Within the scope, various modifications and changes can be made to the embodiments and examples of the present invention.

[0055] For example, in the above embodiment, the power of the system configuration is such that the streaming data recorded on the optical disc 3 (eg, DVD, BD, HDDVD, etc.) is reproduced using the optical disc drive apparatus 1. The streaming data playback system to which is applied is not necessarily the one that requires the optical disk drive 1, and may be a streaming data playback system that also includes a streaming server for delivering streaming data and the power of a computer (personal computer). . In other words, the system may be such that the computer receives streaming data via a communication network and plays back the streaming server. In this case, the computer knows the amount of streaming data stored in the memory, and uses a flag corresponding to the streamer bit (the number of data retransmissions and timeout time, such as when there is a communication failure, depending on the flag value). And switch the command corresponding to the READ12 command including this flag (command to send data to the streaming server) to the streaming server.

As described above, the streaming data reproduction program according to an embodiment of the present invention transmits an information read command to the optical disc drive device on which the optical disc is mounted, and is recorded on the optical disc from the optical disc drive device. A computer-readable streaming data reproduction program that receives streaming data and reproduces the streaming data, the data storage step for storing the received streaming data in a predetermined storage unit, and the predetermined storage A data reproduction step for reproducing the streaming data stored in the storage unit, a data amount monitoring step for monitoring the data amount of the streaming data stored in the predetermined storage unit, and the data monitored in the data amount monitoring step Based on quantity A parameter setting step of switching a parameter value indicating whether or not to perform real-time reproduction of the information read command; Since the computer executes the command transmission step of transmitting the information read command including the parameter set in the parameter setting step to the optical disc drive device, even if a streaming data read error occurs, the image Stopping and image disturbance can be prevented.

In addition, the optical disc driving apparatus according to the embodiment of the present invention reads data recorded on the loaded optical disc based on an information read command transmitted from the computer, and transmits the read data to the computer. An optical disk drive device, wherein a reading error occurs when reading the data, and the value of the parameter indicating whether or not real-time reproduction of the information reading command is performed. Are set to the first predetermined number of times and the time-out period is set to the first predetermined time, and the first retry means for performing the data re-reading operation, and a reading error occurs when reading the data, And the value of the parameter indicating whether or not to perform real-time playback of the information read command When the value for performing real-time playback is set, the number of retries is set to a second number less than the first number, the timeout time is set to a second time shorter than the first time, and the data is reread. Second retry means for performing an operation. Therefore, by using this mechanism, even if streaming data read errors occur, it is possible to prevent image suspension and image disturbance.

Claims

The scope of the claims

[1] Streaming data that can be read by a computer that transmits an information read command to an optical disc driving device on which an optical disc is mounted, receives streaming data recorded on the optical disc from the optical disc driving device, and reproduces the streaming data A playback program,

A data storage step of storing the received streaming data in a predetermined storage unit;

A data reproduction step for reproducing the streaming data stored in the predetermined storage unit;

A data amount monitoring step of monitoring a data amount of streaming data stored in the predetermined storage unit;

A parameter setting step for switching a value of a parameter indicating whether to perform real-time reproduction of the information read command based on the data amount monitored in the data amount monitoring step;

A command transmission step of transmitting the information read command including the parameter set in the parameter setting step to the optical disc driving device;

The streaming data reproduction program characterized by causing the computer to execute

[2] The parameter setting step includes:

When the data amount of the streaming data stored in the predetermined storage unit is equal to or less than a predetermined threshold value, a parameter value for performing real-time playback is set,

2. The streaming data reproduction program according to claim 1, wherein when a data amount of the streaming data stored in the predetermined storage unit is larger than a predetermined threshold value, a parameter value that does not perform real-time reproduction is set.

[3] The information read command is a READ12 command,

The parameter indicating whether to perform the real-time playback is a streamer bit, and the parameter setting step includes:

A predetermined threshold value for the amount of streaming data stored in the predetermined storage unit In the following cases, the value of the streamer david is set to 1,

3. The streaming data reproduction program according to claim 2, wherein when the amount of streaming data stored in the predetermined storage unit is larger than a predetermined threshold value, the value of the streamer bit is set to zero.

[4] An optical disk drive device that reads data recorded on an attached optical disk based on an information read command that is also transmitted by a computer, and transmits the read data to the computer,

When a reading error occurs when reading the data, and the value of the parameter indicating whether or not to perform real-time playback of the information read command, when the value does not perform real-time playback, the number of retries is set to a predetermined first The number of times and the time-out time are set to a predetermined first time, a first retry means for re-reading the data, a read error occurs when the data is read, and the information read command The value of the parameter indicating whether or not to perform real-time playback When the value is to perform real-time playback, the number of retries is a second number less than the first number, and the timeout time is a second number shorter than the first time. A second retry means for performing the data re-reading operation,

An optical disk drive device comprising:

[5] The second retry means includes

When the data cannot be read by the re-reading operation, the next second number is set to be smaller and the next second time is set shorter, and when the data is read, the initial value is exceeded. 5. The optical disk drive device according to claim 4, wherein the second number of times for the next time is set to be larger and the second time for the next time is set to be longer in a range that does not exist.

[6] The information read command is a READ12 command,

The parameter indicating whether or not to perform the real-time playback is a streamer bit, and the first retry means includes

When the value of the stream minder bit is 0, a re-read operation is performed at the first number of times and the first time, The second retry means includes

6. The optical disk drive device according to claim 4, wherein when the value of the streamer bit is high, the re-reading operation is performed at the second number of times and the second time.