JP2017032610A - File size check - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which in a network karaoke system in which a center server distributes music to a karaoke terminal device, if a music file is damaged due to a distribution error, communication failure, or the like, or if a music file is deleted due to some reason after distribution, a user does not notice damage or deletion until they are going to sing, and cannot sing at once.SOLUTION: A network karaoke system verifies a file size between a center server and a karaoke terminal device while a karaoke device is not used, has the center server re-transmit a file if damage of the file is detected, and repairs the damage of the file before a user is going to sing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to karaoke in which music is downloaded from a center and sung.

In recent years, network karaoke, which downloads music files from a center to karaoke equipment, has become common.
Downloading data from the center to karaoke equipment is not limited to music files, but various data files such as background images and firmware update files are downloaded.

  However, when downloading, the download may fail for some reason and the music file may be stored in an incomplete form, or once downloaded, the music file may be damaged or deleted for some reason.

  In such a case, it is generally found when trying to play the music, and then a resend request is made to recover, but in that case, the singing of the music at that time must be abandoned. .

In preparation for such a case, the conventional karaoke apparatus has stored the music file in a redundant manner so as not to hinder the user's singing.
However, the redundancy of all files such as music files consumes a certain amount of disk space, so that even a simple calculation requires twice as much disk space.

JP 2004-151362 A Japanese Patent Laid-Open No. 10-207481

  Patent Document 1 discloses a distribution file and each distribution file on a hard disk in order to detect the damaged information when the information for processing execution in the information storage means such as a hard disk is damaged due to vibration or a momentary power interruption. For example, when the power is turned on once a day or at a predetermined time, the stored distribution data is read into the RAM and the CRC value is calculated. A redistribution request list is created by extracting the calculated CRC value that is different from the stored CRC value. For all the distribution data in the redistribution request list, a redistribution request for the corresponding distribution data is transmitted to the host computer. Then, the redistributed distribution data and CRC value are received and stored in the hard disk again.

  Patent Document 2 provides a karaoke communication system capable of automatically repairing karaoke song data that can no longer be taken out from a central device and playing karaoke song data in a damaged area again on all karaoke terminal devices. Yes, the control personal computer of the central device 1 checks the music data storage unit at regular intervals. If a part of the music data storage unit is damaged, there is a part of the music data storage unit damaged for each performance terminal. And an HDD that is not damaged is designated and notified. Next, each performance terminal receives the notification and stores the karaoke song data stored in each local HDD with time data added to the designated HDD. Next, when the storage of karaoke song data from all the performance terminals to the HDD is completed, the control personal computer organizes the stored karaoke song data of the HDD.

Patent Document 1 is a method that uses CRC (cyclic redundancy check) as a checksum of each file, and is normally performed in the physical layer of data communication, so the same check is performed in the upper layer. There are few merits to perform in the operation scene of karaoke.
In Patent Document 2, the point when the karaoke song data cannot be taken out due to the damage is the point of the patent, and there is no specific reference to the detection method of the damage of the data storage unit.

In order to solve the above-mentioned problem, claim 1 of the present invention is a network karaoke system in which music is distributed from a center server to a karaoke terminal device via a network.
The center server
When transmitting music data etc. to the karaoke terminal device, the data size value including the data size value of the music data, etc., including the music data, etc. is transmitted to the karaoke terminal device, the data size value of the music data already transmitted before the previous time,
The karaoke terminal device detects the damage of the music data by comparing the data size value transmitted above and the data size value such as data held by the karaoke device at an arbitrary time,
When a damage is detected, the network karaoke system is characterized in that the damaged music data is recovered by notifying the center server and retransmitting the music data from the center server to the karaoke terminal device.

  As a result, after the music is downloaded to the karaoke terminal device, the music file can be detected and dealt with before the music file is damaged for some reason and the user cannot sing. Because file redundancy can be avoided, there is no need to increase disk capacity.

Explanatory drawing which showed the Example of Claim 1 of this invention.

An embodiment of the present invention will be described with reference to FIG.
The center server has a music file to be distributed to each karaoke terminal device and music data 3 of the center server including the size (FileSizeS) of each file.
The center server periodically distributes new music files to the karaoke terminal.

Currently, music A, music B, music C, and music D are already distributed to the karaoke terminal device, and are used for singing by users.
Here, since the new music E is added to the center server and becomes the music data 7 of the center server, the center server transmits the music file of the new music E to the karaoke apparatus. At this time, the center server transmits the size (FileSizeS) of the delivered music file simultaneously with the music file of music E. (Transmission data 4)

  The karaoke terminal device that has received the above distribution calculates the file sizes of the music A, the music B, the music C, and the music D that have already been distributed at an arbitrary timing (FileSizeA) and the size of the transmitted music file (FileSizeS) Compare with. (File size comparison data 5) Here, since the file size of the music D is different from the music file size transmitted from the center server, it is considered that the file is damaged, and the music is not sent to the center server. Request the server to resend the music file of D.

  The center server requested to retransmit the music file transmits the music file of the music D to the karaoke terminal apparatus at an arbitrary timing. (Resending data 6 of music data D)

  Thereby, when damage to a music file, a background image file, etc. occurs, the karaoke terminal apparatus detects this promptly, and the possibility that the user can cope before using the file increases.

DESCRIPTION OF SYMBOLS 1 ... Center server 2 ... Karaoke terminal device 3 ... Music data of center server 4 ... Transmission data 5 ... Comparison data of file size 6 ... Retransmission data of music data D 7. -Music data of the center server after adding music E

Claims (1)

In the network karaoke system in which music is distributed from the center server to the karaoke terminal device via the network,
The center server
When sending music data etc. to the karaoke terminal device,
Along with the music data etc., including the data size value of the music data etc., the data size value of the music data etc. transmitted before the previous time is transmitted to the karaoke terminal device,
Karaoke terminal device
At any time, with the data size value sent above,
By comparing data size values such as data held by karaoke devices, it detects damage to music data,
A network karaoke system characterized in that when a damage is detected, the center server is notified of the fact and the music data is retransmitted from the center server to the karaoke terminal device, thereby recovering the damaged music data.

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