JPWO2008056424A1 - Streaming data playback program and optical disk drive - Google Patents

Abstract

The streaming data reproduction program stores a function for issuing an information read command to the optical disk drive (READ12 command issue function f1), a function for storing streaming data received from the optical disk drive 1 (streaming data storage function f2), and the like. A function for decoding the streaming data (streaming data decoding function f3), a function for displaying the reproduced streaming data (streaming data display function f4), and a function for monitoring the amount of stored streaming data (streaming data amount monitoring) A function f5) and a function of switching the value of the streaming bit according to the amount of streaming data (streaming bit switching function f6).

Description

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

  In recent years, DVD-Video data of an optical disk (for example, DVD) mounted on an optical disk driving apparatus in a device configuration in which a host computer (for example, a personal computer) and an optical disk driving apparatus (for example, a DVD drive apparatus) are connected. May play and watch.

  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 READ10 or READ12 command issued by the host computer, the optical disk drive reads data recorded on the optical disk according to various parameters of the READ10 or READ12 command and transfers the data to the host computer. ing.

  In such a READ12 command, one of the parameters is a streaming bit. The streaming bit is a parameter indicating whether or not to perform real-time playback, and the streaming bit “1” indicates that real-time playback is performed (meaning mainly streaming data that requires real-time performance, specifically, Streaming bit “0” indicates that real-time playback is not performed (meaning other than streaming data).

  Currently, among optical disk drive apparatuses, there are known optical disk drive apparatuses that operate differently in response to a data read error (hereinafter referred to as a read error) according to the value of the streaming bit described above. Specifically, when the streaming bit is 0, this optical disc drive device sets a larger number of retries and a longer time-out time at the time of a read error, and rereads data (hereinafter referred to as read retry). . If all the read tries are in error, the host computer is notified that the READ12 command has become an error. On the other hand, when the streaming bit is 1, at the time of a read error, a smaller number of retries and a shorter timeout time are set, read retry is performed, and the read retry time is shortened. Even if all the read retries become errors, the host computer is not notified that the READ12 command has become an error, but is notified of normal termination.

  As prior art documents related to the above description, there are the following.

JP 2003-51123 A JP 2005-149686 A

  Conventionally, when reproducing DVD-Video data recorded on an optical disk with the above-described device configuration, the reproduction operation is executed while the streaming bit value of the READ12 command is fixed to 0 or 1.

  Therefore, when a read error occurs due to scratches or dirt on the optical disc, the reproduced image stops or the reproduced image is disturbed.

  That is, since the data reading process of the optical disk is usually faster than the data reproduction speed, a method of sequentially storing the read data in the memory in the host computer before reproduction is used. If a read error occurs when the value is always 0, even if the DVD-Video data transferred to the host computer is exhausted, a larger number of retries and a longer timeout time are set to perform a read retry. There was a problem that it took time to read out and the reproduced image stopped.

  If a read error occurs when the value of the streaming 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 time are set. Since read retry is performed, there is a problem in that the reproduced image is disturbed without reading data that can be read originally.

  The present invention has been made in order to solve the above-mentioned problems. As an example of the problem, a streaming data reproduction program and an optical disk drive capable of preventing image stoppage and image disturbance when a read error occurs are provided. To provide an apparatus.

  In order to achieve the above object, a streaming data reproduction program according to claim 1 transmits an information read command to an optical disc driving apparatus loaded with an optical disc, and the streaming data recorded on the optical disc is transmitted from the optical disc driving apparatus. A computer-readable streaming data reproduction program that receives and reproduces the streaming data, the data accumulation step for storing the streaming data received from the optical disc drive device in a predetermined storage unit, and the storage in the predetermined storage unit Based on the data reproduction step for reproducing the streaming data, the data amount monitoring step for monitoring the data amount of the streaming data stored in the predetermined storage unit, and the data amount monitored in the data amount monitoring step, in front A parameter setting step for switching a parameter value indicating whether or not to perform real-time reproduction of an information read command; and a command transmission step for transmitting the information read command including the parameter set in the parameter setting step to the optical disc drive device; Are executed by the computer.

  The optical disk drive apparatus according to claim 4 is an optical disk drive apparatus that reads data recorded on a loaded optical disk and transmits the read data to the computer based on an information read command transmitted from the computer. When a read error occurs when reading the data and the value of the parameter indicating whether to perform real-time reproduction of the information read command is a value that does not perform real-time reproduction, the number of retries is determined in advance. A first retry means for setting the first number of times and a time-out time to a predetermined first time, and a re-reading operation of the data; a reading error occurs during the data reading; and the information The parameter value indicating whether to perform real-time playback of the read command is When the value is to perform the im-replay, the data re-read operation is performed by setting the number of retries to a second number smaller than the first number and the timeout time to a second time shorter than the first time. And a second retry means for performing the above.

1 is a schematic configuration diagram of an optical disc reproduction system according to an embodiment of the present invention. It is a functional block diagram which shows the function of the control part of the host computer of the optical disk reproducing | regenerating system which concerns on embodiment of this invention. It is a sequence diagram which shows operation | movement of the optical disk reproduction | regeneration system based on Embodiment of this invention. It is a flowchart which shows in detail the data read instruction | indication process of FIG.3 S100. It is a flowchart which shows the data read process of step S200 of FIG. 3 in detail. It is a flowchart which shows in detail the read error process of step S500 of FIG. It is a flowchart which shows the data reproduction process of step S600 of FIG. 3 in detail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk drive device 2 Host computer 3 Optical disk 10 Optical disk reproduction system 101 Pickup part 102 Signal processing part 103,205 Control part 104 Drive part 105,204 I / F part 201 Operation part 202 Display part 203 Storage part f1 READ12 Command issue function f2 Streaming data storage function f3 Streaming data decoding function f4 Streaming data display function f5 Streaming data amount monitoring function f6 Streaming bit switching function

  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 reproduction 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 device 1 and a host computer 2, and the optical disc drive device 1 reads streaming data recorded on the optical disc 3 in response to a request from the host computer 2. The host computer 2 reproduces the read streaming data. Note that in this embodiment, streaming data refers to video data and audio data that require real-time performance.

  For example, the optical disc drive device 1 is specifically assumed to be 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 I / F). 105).

  The pickup unit 101 is an optical pickup that reads a signal recorded on the mounted optical disc 3, irradiates the optical disc 3 with laser light, converts the reflected light into an electrical signal, and outputs the electrical signal to the signal processing unit 102. It is like that.

  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 receives an instruction regarding data reproduction from the host computer 2 and controls the entire apparatus. 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 performs rotation control of the optical disc 3 or moves the pickup unit 101 based on the drive signal.

  The I / F unit 105 is an interface connected to the host computer 2 that gives instructions regarding data reproduction.

  The host computer 2 is specifically assumed to be a personal computer (hereinafter referred to as a personal computer), for example, and includes an operation unit 201, a display unit 202, a storage unit 203, an interface (hereinafter referred to as I / F) 204, and A control unit 205 is provided.

  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.

  Specifically, the storage unit 203 includes a ROM and a RAM, a hard disk drive (hereinafter referred to as HDD), and stores various programs executed by the control unit 205, various data, and the like. For example, in the present embodiment, a streaming data reproduction program for controlling the optical disk drive device 1 to read streaming data recorded on the optical disk 3 and reproduce the read streaming data is stored. In addition to being stored in the storage unit 203, the streaming data reproduction program can be recorded on a computer-readable recording medium such as a flash memory, CD-ROM, MO, DVD-ROM, or distributed via a communication network. It is also possible.

  The I / F 204 controls communication performed between the host computer 2 and the optical disc recording apparatus 1.

  The control unit 205 is configured to control each part of the apparatus, transmit data, perform various calculations, temporarily store data, and the like. The control unit 205 according to the present embodiment realizes a streaming data reproduction function by executing the above-described streaming data reproduction program. Here, the streaming data reproduction 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.

  The READ12 command issuance function f1 is a function for issuing an information read command (referred to as a READ12 command) to the optical disc drive apparatus 1. When the optical disc drive apparatus 1 receives the READ12 command, it records on the optical disc 3 according to the content of the READ12 command. Read streaming data. Here, the parameters of the READ12 command include the head address of the data to be read, the length of the data to be read, streaming bits, and the like. The streaming bit is a parameter indicating whether or not to perform real-time playback, and the streaming bit “1” indicates that real-time playback is performed (meaning mainly streaming data that requires real-time performance, specifically, Streaming bit “0” indicates that real-time playback is not performed (meaning other than streaming data).

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

  The streaming data decoding function f3 refers to a function of decoding streaming data stored in the storage unit 203.

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

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

  The streaming 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. Specifically, the stored data amount is stored in advance. When the value is equal to or less than the predetermined threshold, the value of the streaming bit is set to 1, and when the value exceeds the predetermined threshold, the value of the streaming bit is set to 0. That is, in this embodiment, the value of the streaming bit is not set fixedly, but is dynamically set according to the amount of stored streaming data. Further, as will be described later, when the streaming bit is 0, the optical disc drive apparatus 1 according to the present embodiment sets a larger number of retries and a longer timeout time at the time of a read error, and performs a data read retry. On the other hand, when the streaming bit is 1, when a read error occurs, a smaller number of retries and a shorter timeout time are set to perform read retries, so when the amount of stored data is small When an instruction is given to the optical disk drive device 1 to perform a read retry in a short time when a read error occurs, and the amount of stored data is sufficient (for example, when streaming data for several tens of seconds is stored) When a read error occurs, read retry will take longer than when the streaming bit is 1. It adapted to provide an indication to the optical disk drive 1 to perform.

  Next, the operation of the optical disk reproduction system 10 according to the present embodiment will be described with reference to FIGS. Here, FIG. 3 is a sequence diagram showing an operation in which the optical disc playback system 10 plays back 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 read in step S500 in FIG. FIG. 7 is a flowchart showing in detail the error processing, and FIG. 7 is a flowchart showing in detail the data reproduction processing in step S600 of FIG. At the start of streaming data playback of the optical disk playback system 10, playback is started after the optical disk drive device 1 reads streaming data for several seconds and stores it on the host computer 2. 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 in which the optical disc reproduction system 10 reproduces streaming data recorded on the optical disc 3 will be described.

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

  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 S120). When the data amount of the streaming data is equal to or smaller than the predetermined threshold, the streaming bit is set to 1 (step S130), and when the data amount of the streaming data exceeds the predetermined threshold, the streaming bit is set to 0. Set (step S140).

  Next, the host computer 2 transmits a READ12 command including the value of the streaming bit set in step S130 or step S140 to the optical disc drive apparatus 1 (step S150). It should be noted that the next address of the read location instructed last time is set as the head address (read location) of the read data included in the READ12 command.

  Next, returning to FIG. 3, when the optical disk drive device 1 receives the READ12 command transmitted from the host computer 2, it reads out the streaming data recorded on the loaded optical disk 3 in accordance with the READ12 command (step S200). Here, the data read process in step S200 will be described in detail with reference to FIG.

  The optical disc drive apparatus 1 receives the READ12 command from the host computer 2 (step S210), and determines whether the value of the streaming bit included in the READ12 command is 0 or 1 (step S220). When the value of the streaming 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, when the value of the streaming bit is 0, the read retry parameters (retry count A2 (> A1) and timeout time T2 (> T1)) when the streaming bit is 0 are acquired (step S240). As described above, the optical disk drive device 1 sets the read retry parameter differently according to the value of the streaming bit. When the streaming bit is 0, the time required for the read retry is set longer. When the streaming bit is 1, the time required for retry is set shorter. As a result, when the streaming bit is 0, the optical disc drive apparatus 1 tries to read the accurate streaming data even if it takes a long time for the read retry. When the streaming bit is 1, the optical disc drive apparatus 1 tries to finish the read retry as quickly as possible. Operate.

  Next, the optical disk drive 1 reads the streaming data in accordance with the READ12 command (step S250).

  Next, returning to FIG. 3, the optical disk drive 1 determines whether or not a read error has occurred (step S300). If no read error has occurred, the optical disk drive 1 transmits the read streaming data to the host computer 2 (step S400). If a read error has occurred, 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.

  The optical disc drive device 1 determines whether the value of the streaming bit is 0 or 1 (step S510). When the value of the streaming bit is 1, a retry is performed using a basic parameter of the reading speed (for example, specifically, only 16 × speed and 8 × speed among the readable speeds) (step S520). When the value of the streaming bit is 0, retry is performed using all parameters (all readable speeds, specifically, for example, 16 × speed, 8 × speed, 5 × speed, and 2 × speed) ( Step S560).

  When the retry is performed using the basic parameter of the reading speed, the optical disc driving apparatus 1 determines whether or not the reading is successful (step S530). Here, the determination as to whether or not the read is possible is to determine whether or not the read is possible with the above-described read retry parameters (the retry count A1 and the timeout time T1) as the upper limit. That is, 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 could not be performed. When the read is successful, the optical disk drive 1 transmits the read streaming data to the optical disk drive 1 (step S540), and the retry count A1 and the timeout time T1 at the streaming bit 1 from the initial values in step S550 described later. If it has been reset to a small value, the number of retries A1 and the timeout time T1 for the streaming 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, the next retry count A1 is set to 7 times. If the read-ready state continues, the host computer 2 sets the streaming bit to 0 and issues it in step S120 of 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 after the read retry, the optical disc drive 1 resets the retry count A1 and the timeout time T1 when the streaming value is 1 to smaller values. (Step S550). For example, if the retry count A1 is currently set to 8 times, the next retry count A1 is set to 6 times. Thus, in the present embodiment, when the streaming bit is 1 and the read retry fails, the read retry parameter value when the streaming bit is 1 is further reduced and set. As a result, when a read error occurs continuously (usually, the location of scratches or dirt is often continuous), the read retry is terminated more quickly.

  On the other hand, when the retry is performed using all parameters of the reading speed, the optical disc driving apparatus 1 determines whether or not the reading is successful (step S570). Here, the determination as to whether or not the read is possible is to determine whether or not the read is possible with the above-described read retry parameters (the retry count A2 and the timeout time T2) as the upper limit. That is, in the read retry operation, when the number of retries reaches A2 or when the timeout time reaches T2, it is determined that the read could not be performed. If the read is successful, the optical disc drive 1 transmits the read streaming data to the optical disc drive 1 (step S580). If the read cannot be performed, that is, if the read cannot be performed even after the read retry, the read is performed. End 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.

  The host computer 2 receives the streaming data transmitted from the optical disk drive device 1 (step S610), and stores the received streaming data in the storage unit 203 (step S620).

  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).

  Next, returning to FIG. 3, the host computer 2 determines whether or not the streaming data to be reproduced has been completed (step S700). If the streaming data to be reproduced has not been completed, the host computer 2 returns to step 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 playback system 10 according to the present embodiment, the value of the streaming bit is dynamically switched according to the data amount of the streaming data stored in the host computer 2 and the READ12 command is issued. Therefore, even if a read error occurs due to scratches or dirt on the optical disk 3, an appropriate reproduction process can be performed. That is, when the amount of stored streaming data is small and it is about to be exhausted, the streaming bit is set to 1 so that the optical disk drive 1 does not spend time on read retry, so that the reproduced image is long. There is no such thing as stopping. In addition, when the amount of stored streaming data is large and there is streaming data up to several tens of seconds ahead, the streaming bit is set to 0, and the optical disk drive 1 is allowed to spend enough time for read retry. Since the streaming data is acquired, the reproduced image is not disturbed.

  While the embodiments and examples of the present invention have been described above, various modifications and changes can be made to the embodiments and examples of the present invention without departing from the spirit of the present invention.

  For example, in the above embodiment, the system configuration is such that the streaming data recorded on the optical disc 3 (for example, DVD, BD, HDDVD, etc.) is reproduced using the optical disc driving apparatus 1, but the present invention is applied. The streaming data reproduction system that does not necessarily require the optical disc drive device 1 may be a streaming data reproduction system that includes a streaming server that distributes streaming data and a computer (personal computer). That is, a system in which a computer receives streaming data from a streaming server via a communication network and plays it back may be used. In this case, the computer grasps the data amount of the streaming data stored in the memory, and sets a flag corresponding to the streaming bit (the number of times of data retransmission and the time-out time differ depending on the flag value). A command corresponding to the READ12 command including the flag and a command (command for instructing the streaming server to transmit data) is transmitted to the streaming server.

  As described above, the streaming data reproduction program according to the embodiment of the present invention transmits an information read command to the optical disk drive device on which the optical disk is mounted, and the streaming data recorded on the optical disk is transmitted from the optical disk drive device. A computer-readable streaming data reproduction program that receives and reproduces the streaming data, the data accumulation step for storing the streaming data received from the optical disc drive device in a predetermined storage unit, and the storage in the predetermined storage unit Based on the data reproduction step for reproducing the streaming data, the data amount monitoring step for monitoring the data amount of the streaming data stored in the predetermined storage unit, and the data amount monitored in the data amount monitoring step, in front A parameter setting step for switching a parameter value indicating whether or not to perform real-time reproduction of an information read command; and a command transmission step for transmitting the information read command including the parameter set in the parameter setting step to the optical disc drive device; Are executed by the computer, and even when a streaming data read error occurs, it is possible to prevent the image from being stopped or disturbed.

  An optical disk drive apparatus according to an embodiment of the present invention reads an image recorded on an attached optical disk based on an information read command transmitted from a computer, and transmits the read data to the computer. If a read error occurs when reading the data and the parameter value indicating whether or not to perform real-time reproduction of the information read command is a value that does not perform real-time reproduction, the number of retries is set in advance. A predetermined first number of times, a timeout time is set to a predetermined first time, a first retry means for performing the data re-reading operation, a reading error occurs during the data reading, and The value of a parameter indicating whether to perform real-time reproduction of the information read command is When the value is to perform real-time playback, the number of retries is set to a second number less than the first number, and 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 when a streaming data read error occurs, it is possible to prevent the image from being stopped or disturbed.

[0003]
Means for Solving the Problems [0013]
In order to achieve the above object, a streaming data reproduction program according to claim 1 transmits an information read command to an optical disc driving apparatus loaded with an optical disc, and the streaming data recorded on the optical disc is transmitted from the optical disc driving apparatus. A computer-readable streaming data reproduction program that receives and reproduces the streaming data, the data accumulation step for storing the streaming data received from the optical disc drive device in a predetermined storage unit, and the storage in the predetermined storage unit Based on the data reproduction step for reproducing the streaming data, the data amount monitoring step for monitoring the data amount of the streaming data stored in the predetermined storage unit, and the data amount monitored in the data amount monitoring step, in front A parameter setting step for switching a parameter value indicating whether or not to perform real-time reproduction of an information read command; and a command transmission step for transmitting the information read command including the parameter set in the parameter setting step to the optical disc drive device; Are executed by the computer.
[0014]
The optical disk drive apparatus according to claim 4 is an optical disk drive apparatus that reads data recorded on a loaded optical disk and transmits the read data to the computer based on an information read command transmitted from the computer. When a read error occurs when reading the data and the parameter value indicating whether or not to perform real-time reproduction of the information read command is a value that does not perform real-time reproduction, the number of retries is determined in advance. A first retry means for performing the data re-reading operation by setting the number of times of 1 and a time-out period to a predetermined first time; a read error when reading the data; and the information read command The value of the parameter indicating whether or not to perform real-time playback of In the case of a value for performing imreplay, the data re-reading operation is performed by setting the number of retries to a second number smaller than the first number and the timeout time to a second time shorter than the first time. Second retry means for performing the second retry means, when the second retry means cannot read the data by the rereading operation, the second number of times for the next time is reduced, and the second time for the next time. When the data can be read, the next number of times is set to be larger and the next time is set to be longer within a range not exceeding the initial value. Features.
BRIEF DESCRIPTION OF THE DRAWINGS [0015]
FIG. 1 is a schematic configuration diagram of an optical disk reproduction system according to an embodiment of the present invention.

  The optical disk drive apparatus according to claim 4 is an optical disk drive apparatus that reads data recorded on a loaded optical disk and transmits the read data to the computer based on an information read command transmitted from the computer. When a read error occurs when reading the data and the value of the parameter indicating whether to perform real-time reproduction of the information read command is a value that does not perform real-time reproduction, the number of retries is determined in advance. A first retry means for setting the first number of times and a time-out time to a predetermined first time, and a re-reading operation of the data; a reading error occurs during the data reading; and the information The parameter value indicating whether to perform real-time playback of the read command is In the case of a value for performing an im-replay, the data re-reading operation is performed by setting the number of retries to a second number smaller than the first number and the timeout time to a second time shorter than the first time. And a second retry means for performing.

Claims (6)

A computer-readable streaming data playback program that transmits an information read command to an optical disk drive mounted with an optical disk, receives streaming data recorded on the optical disk from the optical disk drive, and plays back the streaming data. There,
A data storage step of storing the streaming data received from the optical disk drive in a predetermined storage unit;
A data reproduction step of 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 parameter value indicating whether or not 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;
A streaming data reproduction program characterized by causing the computer to execute. 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. The information read command is a READ12 command,
The parameter indicating whether to perform the real-time reproduction is a streaming bit,
The parameter setting step includes:
When the amount of streaming data stored in the predetermined storage unit is equal to or less than a predetermined threshold, the value of the streaming bit is set to 1,
3. The streaming data reproducing program according to claim 2, wherein when the amount of streaming data stored in the predetermined storage unit is larger than a predetermined threshold, the value of the streaming bit is set to zero. Based on an information read command transmitted from a computer, an optical disk drive device that reads data recorded on a mounted optical disk and transmits the read data to the computer,
When a read error occurs when reading the data and the value of the parameter indicating whether or not to perform real-time reproduction of the information read command is a value that does not perform real-time reproduction, a first number of retries determined in advance is set. A first retry means for performing the data re-reading operation by setting the number of times and the timeout time to a predetermined first time;
When 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 read command is a value for performing the real-time reproduction, the number of retries is set from the first number. A second retry means for setting the time-out time to a second time shorter than the first time and performing a re-reading operation of the data,
An optical disk drive device comprising: 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 to be shorter, and when the data can be 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 within a range that does not exist. The information read command is a READ12 command,
The parameter indicating whether to perform the real-time reproduction is a streaming bit,
The first retry means includes
When the value of the streaming 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 streaming bit is 1, the re-reading operation is performed at the second number of times and the second time.

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