KR100343668B1 - Data interface method for multimedia system - Google Patents

Abstract

The present invention relates to a data interface technique in a multimedia system that realizes a high speed interface and high reliability by allowing a board to access and import data using a transferable bus control right. Unlike the above-described conventional method of reading required data from a storage medium and transmitting the data to a board through a separate parallel or serial line, a player board for processing a background video and a karaoke board for processing accompaniment are used for bus control. This allows data to be directly imported from a storage medium (CD-ROM, DVD-ROM, etc.) while sending and receiving data, thereby achieving high speed and high reliability of the data interface.

Description

DATA INTERFACE METHOD FOR MULTIMEDIA SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital multimedia system using an optical disc, and more particularly, to effectively perform a data interface in a multimedia system providing an accompaniment sound and a corresponding background video using a storage medium such as a CD-ROM or a DVD-ROM. The present invention relates to a data interface method in a multimedia system.

As is well known, multimedia systems, especially digital karaoke systems (or song accompaniment systems), organically process the accompaniment information, subtitle information, and video information in synchronism, while providing accompaniment accompaniment through the speaker. It is a device that provides an arbitrary video (that is, a background video) mixed with caption information about song lyrics on a monitor. At this time, as a storage means for storing the background video data and the accompaniment sound data, for example, a large-capacity optical disk or the like is used, and these optical disks are reproduced (or read) by a CD-ROM or a DVD-ROM or the like. do.

To this end, multimedia digital karaoke systems process accompaniment sound and background video data after processing signals (e.g., waveform shaping, noise reduction, EFM demodulation, etc.) read from storage media (CD-ROM, DVD-ROM, etc.). It separates and transfers each board through a separate parallel or serial line, that is, MPEG video board or MPEG audio board, and restores the original signal to output accompaniment sound and background video through speakers and monitors. At this time, the accompaniment signal of the selected song is mixed with the user's voice signal input through the external microphone and delivered to the speaker.

Therefore, users can listen to the subtitle information displayed in OSD form on the monitor (for example, the lower side of the monitor) along with the background video displayed on the monitor, that is, sing the music while watching the lyrics of the song selected by the user. Can be.

However, the conventional data interface method as described above has a problem in that its speed is slow because it reads necessary data and transmits it through a separate parallel or serial line, and it has to be closely related to hardware between these devices. This has the disadvantage that the structure is complicated.

Accordingly, the present invention is to solve the above problems of the prior art, by using a transferable bus control right to the board required to access the data in a multimedia system that can realize a high-speed interface and high reliability Its purpose is to provide a data interface method.

In order to achieve the above object, the present invention provides a method for interfacing data in a multimedia system having a player board for processing a background video and a karaoke board for processing accompaniment, wherein the optical disc for karaoke is mounted on a deck. Reading index information of the TOC contained in the optical disk, receiving the index information through a bus, and storing the index information in a memory block in the player board; When the storage of the index information of the TOC is completed, switching an output path of the bus to the karaoke board, and then transferring a bus control right to the karaoke board; Directly accessing through the bus and receiving accompaniment sound data read and drawn from the mounted optical disk and storing the accompaniment sound data in a memory block of the karaoke board; When the storing of the accompaniment sound data is completed, returning the bus control right to the player board; And switching the output path of the bus to the player board in response to the return of the bus control right, and then performing a standby mode for playing a music selection or karaoke.

1 is a block diagram of an example of a karaoke system suitable for applying a data interface method according to the present invention;

FIG. 2 is a schematic block diagram of the player board shown in FIG. 1;

3 is a schematic block diagram of the karaoke board shown in FIG.

4 is a flowchart illustrating a process of performing a data interface in a multimedia system according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

102: external storage device 104: switching board

106: player board 108: karaoke board

202: player control block 204, 302: RF block

206, 304: digital signal processing block 208, 308: memory block

210: MPEG video decoding block 306: Karaoke control block

310: MPEG audio decoding block

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The core technical aspect of the present invention is that the player board for processing the background video and the karaoke board for processing the accompaniment to directly transfer data required from the storage medium (CD-ROM, DVD-ROM, etc.) to the bus control. Through this technical means, it is possible to easily achieve the object of the present invention.

1 is a block diagram of an example of a karaoke system suitable for applying a data interface method according to the present invention. The multimedia karaoke system includes an external storage device 102, a switching board 104, a player board 106, and a karaoke system. Karaoke board 108.

Referring to FIG. 1, the external storage device 102 is a CD-ROM or DVD-ROM or the like including a deck having an optical pickup for optically reading the digital data recorded on the optical disk, and the like. TOC information, accompaniment data, and background video data are delivered to player board 106 or karaoke board 108 via switching board 104 connected via a bus (eg, a standard IDE bus).

In addition, the switching board 104 switches the data transmitted from the external storage device 102 via the bus, that is, in response to the bus control signal provided from the player board 106 via the line L11, the TOC information and the background video data. And the accompaniment sound data to the karaoke board 108. Here, the TOC information includes, for example, the number of songs recorded on the optical disk, the list of songs, the position information of each song, the song number information, the index information, the playing time information of each song, and the like.

The player board 106 then processes the TOC information and background video data provided through the switching board 104 and generates a bus control signal via line L11 to control the data output path at the switching board 104. As an example, it has a configuration as shown in FIG.

FIG. 2 is a schematic block diagram of the player board 106 shown in FIG. 1, which includes a player control block 202, an RF block 204, a digital signal processing block 206, an MPEG video decoding block 208, and Memory block 210.

Referring to FIG. 2, the player control block 202 includes, for example, a microprocessor for performing overall operation control on the player board 106, based on the servo control signal provided from the RF block 204. To control the drive of the servo mounted in the external storage device 102, and the index information (additional information or sub code) of the TOC for control read in the lead-in area of the optical disk mounted on the deck. And demodulation and reconstruction of digital background video data compression-coded according to the MPEG algorithm.

In addition, when the optical disc for karaoke is mounted on the deck, the player control block 202 reads out the index information of the TOC from the optical disc, and then generates a bus control signal through the line L11 to output the output path from the switching board 104. Switch to the karaoke board 108, notify the karaoke board 108 via line L13 (i.e., notify the transfer of bus control), and when the bus control return notification comes from the karaoke board 108 via line L13, In response, a bus control signal is generated via line L11 to switch the output path from switching board 104 to player board 106.

Next, the RF block 202 generates a server control signal by processing the reproduction signal (that is, the index information of the TOC and the background video data signal) transmitted through the switching board 104 to the player control block 202. The digital signal processing block 206 is processed to perform level amplification, noise reduction, and waveform equalization.

The digital signal processing block 206 then demodulates, for example, the EFM modulated signal into the original signal, passing the index information data of the demodulated TOC to the player control block 202, and demodulating the background video data (i.e., The compressed and encoded background video data is transmitted to the MPEG video decoding block 210.

Next, the MPEG video decoding block 210 reconstructs the original signal before compression encoding provided from the digital signal processing block 206 in the karaoke reproduction mode on the basis of the control signal provided from the player control block 202. Afterwards, transfer to the display side, not shown.

That is, as described above, the player board 206 manages bus control rights for the path switching in the switching board 104 to store data required by the player board 106 and the karaoke board 108 from the storage medium. It directly controls to import, and also performs processing of index information and background video data of the TOC delivered in the initial mode (i.e., the mode when the optical disc is mounted on the deck) or the karaoke playback mode.

Referring back to FIG. 1, the karaoke board 108 processes accompaniment sound data provided through the switching board 104 according to bus control from the player board 108, as shown in FIG. 3 as an example. Have the same configuration.

FIG. 3 is a schematic block diagram of the karaoke board 108 shown in FIG. 1, and includes an RF block 302, a digital signal processing block 304, a karaoke control block 306, a memory block 308, and MPEG audio. And decoding block 310.

Referring to FIG. 3, the RF block 302 processes a digital signal by performing level amplification, noise removal, waveform equalization, and the like on a reproduction signal (that is, an accompaniment data signal) transmitted through the switching board 104. Passed to block 304, the digital signal processing block 304 demodulates, for example, the EFM modulated accompaniment signal into the original signal prior to modulation and forwards it to the karaoke control block 306.

The karaoke control block 306 then includes a microprocessor for performing overall operational control on the karaoke board 108, for example, switching upon receipt of a bus control transfer notification from the player board 106 via line L13. Access the external storage device 102 directly through the board 104 to obtain accompaniment data, process the received accompaniment data, and store the accompaniment data in the memory block 308, and store all the accompaniment data contained in the optical disk. After the withdrawal, the player board 106 is notified of the return of the bus control right through the line L13.

In addition, the karaoke control block 306 extracts the accompaniment sound of the song selected by the user from the memory block 308 in the music selection mode according to an external manipulation or selection signal, and delivers the accompaniment sound data to the MPEG audio decoding block 310. .

On the other hand, the MPEG audio decoding block 310 restores the compression-encoded digital accompaniment sound data provided from the karaoke control block 306 to the original signal before compression encoding in the music selection playback mode. The sound signal is transmitted to the speaker (not shown) and mixed with a user voice signal (ie, a song voice) input through an external microphone and then output through the speaker.

Therefore, the user can listen to a song in which the voice and the accompaniment sound are mixed through the speaker.

Next, a process of interfacing data according to the present invention using the karaoke system for multimedia having the above-described configuration will be described.

4 is a flowchart illustrating a process of performing a data interface in a multimedia system according to a preferred embodiment of the present invention.

Referring to FIG. 4, the multimedia karaoke system performs a standby mode in a power-on state (step 402), and an optical disc (ie, CD, DVD) is placed on a deck in the external storage device 102 while performing the standby mode. Etc.), i.e., the player control block 202 of FIG. 2 checks whether or not a mount detection signal is input from a mount detection sensor not shown in the optical disk (step 404). At this time, the output path of the switching board 104 is set to the player board 106 unless the bus control right is transferred from the player board 106 to the karaoke board 108.

If the check in step 404 determines that the optical disc is mounted on the deck, the player control block 202 drives the deck in the external storage device 102 to index the TOC contained in the lead-in area of the optical disc. The information is read, and the index information of the TOC thus read and reproduced is stored in the memory block 208 of FIG. 2 (step 406).

Next, when all of the TOC index information is stored, the player control block 202 checks whether the optical disc mounted on the deck is a normal optical disc or a karaoke optical disc (step 408). If it is determined that the mounted optical disc is a normal optical disc, the player control block 202 performs a standby mode and waits for user input from the outside, and a corresponding normal mode when an external user input is applied. (E.g., playback mode, repeat playback mode, search mode, etc.) (step 410).

Here, the classification of the general optical disk or the optical disk for karaoke can be recognized through a mark marked separately on the optical disk, and this mark is detected by the sensor for detecting the mark and transmitted to the player control block 202.

On the other hand, if the check in the step 408 determines that the mounted optical disk is an optical disk for karaoke, the player control block 202 generates a bus control signal via the line L11 to output the switching board 104. After switching the path to the karaoke board 108, the karaoke control block 306 in the karaoke board 108 is notified of the bus control transfer via the line L13 (step 412).

Accordingly, the karaoke control block 306 directly accesses the external storage device 102 through the switching board 104 to bring accompaniment data contained in the optical disk. That is, the accompaniment data read from the mounted optical disk is transferred via the switching board 104 and demodulated to the original signal before modulation through the RF block 302 and the digital signal processing block 304, and then the memory block 308. (Step 414).

Then, when the withdrawal and storage of the accompaniment sound data is completed (step 416), the karaoke control block 306 notifies the bus control right return to the player control block 202 in the player board 106 via the line L13 (step 418).

Subsequently, when the player control block 202 is notified of the bus control right return from the karaoke control block 306 via the line L13, a bus control signal is generated on the line L11 in response to the output path from the switching board 104. Switching to the player board 106 and then performing a standby mode for user selection (step 420).

Accordingly, the player control block 202 in the player board 106 checks whether or not the selection signal according to the user's operation is input while performing the standby mode (step 422), where the user selection signal is input as a result of the check. If it is determined, the karaoke system performs a corresponding karaoke playback mode, i.e., the player board 106 reads the background video corresponding to the song selected by the user from the external storage device 102 and restores the original video to display the original signal. The karaoke board 108 extracts the accompaniment sound data of the song selected by the user from the memory block 308 and restores the original signal to the speaker signal (step 422).

In this way, the user may listen to a song in which a voice and an accompaniment are mixed through a speaker while watching a background video (ie, a background video including lyrics subtitles) through a monitor.

As described above, according to the present invention, unlike the above-described conventional method of reading the necessary data from the storage medium and transmitting the data to each board through a separate parallel or serial line, the player board and accompaniment sound for processing the background video By allowing the processing karaoke board to directly transfer data required from the storage medium (CD-ROM, DVD-ROM, etc.) while exchanging bus control rights, it is possible to realize high speed and high reliability of the data interface.

Claims (2)

In a method for interfacing data in a multimedia system having a player board for processing a background video and a karaoke board for processing accompaniment, When the optical disk for karaoke is mounted on the deck, reading the index information of the TOC contained in the mounted optical disk, receiving the index information through a bus, and storing the index information in a memory block in the player board; When the storage of the index information of the TOC is completed, switching an output path of the bus to the karaoke board, and then transferring a bus control right to the karaoke board; Directly accessing through the bus and receiving accompaniment sound data read and drawn from the mounted optical disk and storing the accompaniment sound data in a memory block of the karaoke board; When the storing of the accompaniment sound data is completed, returning the bus control right to the player board; And Switching the output path of the bus to the player board in response to the return of the bus control right, and then performing a standby mode for playing music or karaoke. The method of claim 1, wherein the bus is a standard IDE bus.