CN1929011B - Kara OK system - Google Patents

Abstract

The invention provides a karaoke system. The karaoke system includes an optical information storage medium and a playback device. The optical information storage medium stores thereon a plurality of encrypted audio files, at least one encrypted video file, and an encrypted look-up table. The comparison table is used for recording the corresponding relation between the encrypted audio file and a plurality of sorting indexes. When the optical information storage medium is placed into the playing device, the playing device acquires and decrypts the encrypted comparison table from the optical information storage medium, the playing device responds to a demand instruction, acquires and decrypts the encrypted audio file according to the comparison table, acquires and decrypts the encrypted video file or one section of the video file, and synchronously plays the audio file and the video file.

Description

Karaoke system

technical field

The invention relates to a karaoke system, in particular to a karaoke system that allows users to select and play music and movies stored in a CD through a directory presented by a CD drive.

Background technique

High-density optical recording media, such as compact disc-recordable (CD-R) or digital video disc-recordable (DVD-R), have the advantage of being able to record large amounts of data , has been widely used to record a large amount of video and audio data. Among them, the powerful functions of DVD players in audio-visual aspects are being continuously developed, so that there is a strong demand for the application of karaoke systems (Karaoke system). However, currently limited by the capacity of the DVD disc, if the original audio files of the songs are stored, too many songs cannot be stored on the same disc; It is not direct and natural enough, and at the same time, there are many restrictions when choosing songs. And, if every music video (Music TV, MTV) is all stored on the DVD disc, then the number of tunes that can be stored is very few.

In addition, in terms of intellectual property protection, nowadays, the entire disk is mostly handled in a copy-proof manner, and there is a lack of protection for individual files. If the copy protection method is broken, then the protection of all data on the disk becomes very difficult.

Therefore, there is a need to provide an audio-visual player capable of playing multiple songs and having a data protection function, so as to solve the above-mentioned problems.

Contents of the invention

The main scope of the present invention is to provide a karaoke system, and in particular, the karaoke system has large-capacity song storage and information security functions.

According to a preferred embodiment, the karaoke system of the present invention includes an optical information storage medium and a playback apparatus. The optical information storage medium stores multiple encrypted audio files (Audio file), at least one encrypted video file (Video file) and an encrypted look-up table. The comparison table is used to record the correspondence between the encrypted audio file and multiple sorting indexes. The playback device is electrically connected to a display (Display). The display is used for displaying video and audio information sent by the playback device.

When the optical information storage medium is put into the playback device, the playback device decrypts the encrypted lookup table obtained from the optical information storage medium. The playback device receives and responds to a user's demand command, obtains an encrypted audio file in the encrypted audio files according to the decrypted comparison table, and obtains one of the encrypted video files in addition , or a part of encrypted video files, and decrypt these encrypted audio files and video files, and finally play the decrypted audio files and video files synchronously. Wherein, the playback device further includes a memory, which can be used as a buffer device for decoding or playing audio files or video files, and the playback device stores the decrypted audio files in the memory before playing the decrypted audio files . Each audio file in the encrypted audio file has a corresponding lyrics information (Lyric information). Moreover, the encrypted audio file conforms to an OGG Vorbis specification after being decrypted.

In addition, the optical information storage medium stores label information on it, and when the optical information storage medium is placed in the playback device, the playback device first obtains the label information from the optical information storage medium, And identify the optical information storage medium according to the acquired label information.

Therefore, according to a preferred embodiment, by using audio files with better coding efficiency, the karaoke system can store more songs, and by using encrypted files, the karaoke system has a security function, so that the files stored in The information in the optical information storage medium will not have the risk of information leakage due to improper copying, and indirectly protects the intellectual property rights of the information.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram according to a preferred embodiment of the present invention.

Fig. 2 is a flow chart of playing according to the preferred embodiment.

Description of reference symbols

1: Karaoke system 16: Monitor

12: Optical information storage medium 14: Playback device

Detailed ways

Referring to FIG. 1, FIG. 1 is a schematic diagram according to a preferred embodiment of the present invention. The karaoke system 1 of the present invention includes an optical information storage medium 12 and a playback device 14 . The optical information storage medium 12 stores a plurality of encrypted audio files, at least one encrypted video file and an encrypted lookup table. The comparison table is used to record the correspondence between the encrypted audio file and multiple sorting indexes. The playback device includes a memory for temporarily storing the audio file to be decrypted. This is because the background video is also played when the song is played, and the audio file and the video file are usually placed in two different discs. Position, if you want to read two files in different positions at the same time, the servo movement of the playback device will take a long time, which may cause pauses during playback. Therefore, the smaller audio files of the file are stored in the memory of the playback device 14 first, and only the video files in the CD are read when playing songs and movies. The playback device 14 is electrically connected to a display 16 . The display 16 is used for displaying video and audio information transmitted by the playback device 14 .

According to the preferred embodiment, the optical information storage medium 12 is a DVD disc, and a label information is stored thereon for the playback device 14 to identify. Each encrypted audio file conforms to an OGG Vorbis specification after being decrypted, and corresponds to a lyric information.

Please refer to Fig. 2, Fig. 2 is a playing flow chart according to the preferred embodiment. When this DVD disk 12 is put in this playback device 14, this playback device 14 first obtains the label information of this DVD disk 12, and identifies whether this DVD disk 12 is the karaoke disc that this playback device 14 can use piece. If yes, follow-up steps are performed; if no, an error message appears, and even the DVD disk 12 is refused to be read.

After confirming that the DVD disk 12 is correct, the playback device 14 obtains the encrypted lookup table from the DVD disk 12 and decrypts the encrypted lookup table. After interpreting the information of the comparison table, the playback device 14 initializes a user interface (User interface) based on the information of the comparison table, and displays it on the display 16 . The playback device 14 provides a function menu for the user to select a song based on the information in the comparison table. This function menu can provide a variety of selection methods, the commonly used ones are as follows:

1) singers order songs, and the playback device 14 lists the singers recorded in the comparison table according to specific classifications on the display 16 based on the comparison table, such as "Hong Kong and Taiwan male singers" and "chorus groups" or the like, in After selecting one of the singers, the playback device 14 will search its firmware for the songs owned by the singer, and list the singer's songs on the display 16 based on the comparison table. The index in the comparison table can also be the pinyin index of the singer's name, for example, record the first letter of the singer's name from a to z, and then search in any text after clicking;

2) ordering songs by serial number, the playback device 14 provides a numbering input interface, which is displayed on the display 16, and the user can directly input the numbering of the song book;

3) pinyin ordering songs, the playback device 14 provides a pinyin initial letter input interface on the display 16, and the user can directly input the initial letter of the song title to be sought, and the playback device 14 responds to the input initial letter, based on the The comparison table will meet the song title of this input initial letter and list on this display 16;

4) song selection by category, based on the comparison table, the playback device 14 lists the songs recorded in the comparison table according to specific classifications on the display 16, such as "dance music", "folk songs" and "nursery rhymes" or the like;

5) Language song selection, the playback device 14 lists the songs in the DVD disc 12 according to specific classifications on the display 16 based on the comparison table, such as "Chinese", "English" and "French" or the like.

When the user uses the function menu to select a song, the playback device 14 obtains the audio file corresponding to the selected song from the DVD disc 12, decrypts the obtained audio file, and stores it in the memory of the playback device 14 . The playback device 14 then obtains one or a small segment of encrypted video files in the encrypted video files according to the user's designation or randomly, and decrypts the obtained encrypted video files. Subsequently, the playback device 14 decodes and plays the audio file stored in the memory and the video file obtained and decrypted synchronously. At the same time, the playback device 14 obtains the lyrics information from the audio file obtained and decrypted, and displays the lyrics 16 displays and synchronously updates the lyrics of the song being played. After the playing device 14 finishes playing, the user can use the function menu to select a song, or end playing. In addition, if the user selects multiple songs, the playback device 14 will play them sequentially in the aforementioned manner.

It should be noted that the comparison table of the present invention can be stored on the DVD disc 12 in the form of multiple index files or combined into a single associated file. The comparison table is based on the storage content of the DVD disc 12 and records information that can be used for the playback device 14 to initialize the song selection function menu. For example, according to the preferred specific embodiment, the index included in the comparison table can represent a correspondence between a song internal code and an audio file, a correspondence between a song title and a song internal number, a correspondence between a song title and a singer, a The corresponding relationship between singers and singer classifications, the corresponding relationship between a songbook number and the internal number of a song, the corresponding relationship between a song name and an initial letter, the corresponding relationship between a song name and a song category, the corresponding relationship between a song name and a language type, and other necessary correspondences. Each song selection method will use at least one corresponding relationship, so the selection methods provided by the function menu of the song selection must be determined according to the corresponding relationship included in the comparison table. According to this preferred specific embodiment, several commonly used song selection methods are only cited, but not limited thereto. For example, common selection methods include song selection by song name and song selection by singer and region. Therefore, when the comparison table contains fewer types of correspondences, the playback device 14 can provide fewer song selection methods, and it can be known when the user interface is initialized. In addition, the formats of these index files can be similar, for example, start with the file length, and then record various information and offset addresses in a certain order. After the content of the index file is read by the playback device 14, it will be processed to extract useful information, arranged and integrated, and stored in the memory for later use.

In addition, for randomly playing one of the encrypted video files, or randomly playing a section of video in the middle of the encrypted video file, the playback device 14 can also increase random access restrictions, such as not continuously obtaining the same video file for more than three times Etc., or classify the video files, and cooperate with the appropriate corresponding relationship, based on the selected song and the appropriate corresponding relationship, obtain the video files, so as to increase the practicability of the karaoke system 1 of the present invention. In addition, if the memory of the playback device 14 has sufficient capacity, the acquired video file can also be stored in the memory before playing, so as to increase the performance of playing.

In summary, according to the preferred embodiment, by using compressed audio files, the karaoke system can store more songs, and by using encrypted files, the karaoke system has a security function, so that the files stored in The information in the optical information storage medium will not have the risk of information leakage due to improper copying, and indirectly protects the intellectual property rights of the information.

Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the appended claims of the present invention. Therefore, the scope of the claims of the present invention should be interpreted on the basis of the above description in the broadest way so as to cover all possible changes and arrangements having equivalents.

Claims (9)

1. A karaoke system, comprising: An optical information storage medium storing thereon a plurality of encrypted audio files, at least one encrypted video file, and an encrypted look-up table for recording the encrypted audio files and a plurality of sorting indexes Correspondence between; and A playback device, when the optical information storage medium is placed in the playback device, the playback device obtains the encrypted comparison table from the optical information storage medium, decrypts the encrypted comparison table, and responds to a demand command according to The decrypted comparison table obtains an encrypted audio file among the encrypted audio files, obtains one or a segment of encrypted video files, decrypts the obtained encrypted audio files and video files, and plays the encrypted audio files synchronously. The obtained and decrypted audio file and the obtained and decrypted video file. 2. The karaoke system of claim 1, wherein each of the encrypted audio files includes a lyric information. 3. The karaoke system as claimed in claim 1, wherein the playing device further comprises a memory, and the playing device stores the obtained and decrypted audio file in the memory before playing the obtained and decrypted audio file. 4. The karaoke system as claimed in claim 3, wherein the memory is also used to store the obtained and decrypted video file. 5. The karaoke system as claimed in claim 1, wherein each of the encrypted audio files in the encrypted audio files conforms to an OGG Vorbis specification after being decrypted. 6. The karaoke system as claimed in claim 1, wherein a label information is stored on the optical information storage medium, and when the optical information storage medium is installed in the playback device, the playback device starts from the optical information storage medium The information storage medium acquires the label information, and identifies the optical information storage medium according to the acquired label information. 7. The karaoke system as claimed in claim 1, wherein the playback device randomly plays one or a section of encrypted video files. 8. The karaoke system as claimed in claim 7, wherein the playback device limits the number of consecutive acquisitions of the same video file or the same video file. 9. The karaoke system as claimed in claim 1, wherein the playback device classifies the video files, and cooperates with an appropriate corresponding relationship, based on the obtained song and the appropriate corresponding relationship, obtains one or a section of video document.

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