KR20080042534A - Apparatus for providing multimedia data and operating method thereof, digital multimedia system using the same and operating method thereof - Google Patents

Abstract

An apparatus for providing multimedia data, a digital multimedia system using the same, and an operating method thereof are provided to receive multimedia data of various formats stored in a storage, to convert the multimedia data into MPEG-TS(moving picture experts group-transport stream), and to transmit the MPEG-TS to an external digital device so that a user watches the multimedia data through the digital TV. An apparatus for providing multimedia data(200) comprises a storage(210), a decoder(230), an MPEG converting part(240), wireless interface parts(250,310), and a control part. The storage stores multimedia data of various formats. The MPEG converting part converts the data decoded by the decoder into MPEG-TS. The wireless interface parts transmit the converted MPEG-TS to the outside. The wireless interface parts are blue tooth or wireless local area network. A digital image/voice output device(350) stores the MPEG-TS, and image/voice-processes the MPEG-TS for output.

Description

Apparatus for Providing Multimedia Data and Operating Method Thereof, Digital Multimedia System using the same and Operating Method Thereof}

1 is a block diagram showing the configuration of an apparatus for providing multimedia data of the present invention.

2 is a flowchart illustrating a method of operating a multimedia data providing apparatus of the present invention.

Figure 3 is a block diagram showing the configuration of a digital multimedia system using a multimedia data providing apparatus of the present invention.

4 is a flowchart illustrating a method of operating a digital multimedia system using the apparatus for providing multimedia data of the present invention.

Explanation of symbols on the main parts of the drawings

200: multimedia data providing device 210: storage medium

220: first control unit 230: decoder

240: MPEG conversion unit 250: first air interface unit

260: user interface 300: digital television

310: second air interface unit 320: second control unit

330: PVR 340: video / audio processing unit

350: video / audio output unit

The present invention relates to an apparatus for providing multimedia data, a digital multimedia system using the same, and a method of operating the same.

Recently, with the development of digital technologies such as digital image compression and digital modulation / demodulation, the standardization and commercialization of digital television broadcasting is rapidly progressing. In the conventional terrestrial, satellite, and cable broadcasting, MPEG (Moving Picture Experts Group) Based on the trend is becoming digital.

In digital broadcasting, a plurality of broadcast programs encoded on the basis of MPEG are multiplexed and transmitted in the form of a transport stream. The transport stream is received by a digital broadcast receiver such as a set-top box (STB) and inversed. Multiplexed.

Therefore, only one broadcast program desired by a user can be selected. Also, in a digital broadcast receiver such as a set-top box, a general television after restoring the selected broadcast program to an original audio and video signal using an MPEG decoder included in the receiver Output to an audio / video output device such as

In addition to providing a unidirectional broadcast program service, an Internet set-top box is provided to provide an interactive service that enables web search through a television screen.

On the other hand, in the case of a personal computer (PC), the capacity of a storage medium has increased considerably compared to the past, and this large storage medium makes it possible to easily store and play various multimedia files on a PC.

In general, since a movie or a movie such as a movie has a large data capacity, it can be stored on a general personal PC and then viewed using a multimedia player that supports various multimedia formats (for example, avi, mpg, data, divx, etc.). Can be.

As such, watching a variety of multimedia using a PC has advantages in that it can be viewed at a desired time without time constraints, easy to edit a video, and easy to store and manage.

However, watching a variety of multimedia on a personal PC has the disadvantages of sitting in front of a narrow computer desk to view and constraints, depending on the size of the monitor (usually 17 to 21 inches).

Therefore, there is a demand to watch a variety of multimedia that can be played on a PC through a digital television that supports clearer picture quality and higher resolution in a large place such as a living room or a bedroom.

If you are currently watching digital broadcasts, you can install a large-capacity hard disk inside a digital television or set-top box to store the broadcast stream that is broadcast at a specified time, and then play and view the broadcasts stored on the large-capacity hard disk at a desired time. have.

However, in order to enjoy a variety of multimedia stored on the PC, there is a hassle of converting a general video into a digital television using a separate software and watching it, and the design of the digital television becomes complicated and produced. The cost increases.

Accordingly, an object of the present invention is to extract multimedia data of various formats stored in a storage medium, convert the multimedia data into a Moving Picture Experts Group-Transport Stream (MPEG-TS), and then wirelessly transmit the image data to an external digital device and output the video / audio process. An apparatus for providing multimedia data, a digital multimedia system using the same, and a method of operating the same are provided.

According to a preferred embodiment of the present invention, an apparatus for providing multimedia data includes a storage medium for storing multimedia data in various formats, a decoder for decoding multimedia data stored in the storage medium, and data decoded by the decoder. MPEG conversion unit for converting to Moving Picture Experts Group-Transport Stream, wireless interface unit for transmitting MPEG-TS converted by MPEG conversion unit to outside, and decoding multimedia data stored in the storage medium, MPEG- And a control unit for controlling conversion to TS and transmission to the outside.

A preferred embodiment of the digital multimedia system using the multimedia data providing apparatus of the present invention is a multimedia data providing apparatus for converting and transmitting multimedia data of various formats into a Moving Picture Experts Group-Transport Stream (MPEG-TS), and the multimedia data. And a digital video / audio output device for receiving and storing the MPEG-TS transmitted by the providing device or outputting the video / audio process.

The apparatus for providing multimedia data may include a storage medium for storing multimedia data in various formats, a decoder for decoding multimedia data stored in the storage medium, and MPEG-TS (Moving Picture Experts Group) data decoded by the decoder. A MPEG conversion unit for converting to a transport stream, a wireless interface unit for transmitting the MPEG-TS converted by the MPEG conversion unit to the digital video / audio output device, and decoding multimedia data stored in the storage medium, And a control unit for controlling conversion to MPEG-TS and transmission to the digital video / audio output device.

The digital video / audio output apparatus may include a wireless interface unit receiving MPEG-TS transmitted by the multimedia data providing apparatus, a personal video recorder (PVR) storing the MPEG-TS received by the wireless interface unit, A video / audio processor for video / audio processing the MPEG-TS stored in the PVR and the MPEG-TS received by the wireless interface unit, a video / audio output unit for outputting video / audio processed by the video / audio processor; And a controller configured to receive the MPEG-TS transmitted by the multimedia data providing apparatus and to control the output of the received MPEG-TS by storing or video / audio processing.

The wireless interface unit includes a Bluetooth or a wireless local area network, and in particular, the wireless LAN satisfies the IEEE.802.11a standard.

According to an embodiment of the present invention, when the operation command input through the user interface is a file name display command, the controller extracts and displays file names of multimedia data of various formats stored in a storage medium. And extracting, by the controller, multimedia data having a file name selected through the user interface from the storage medium, and decoding, by the decoder, multimedia data extracted from the storage medium under control of the controller; The MPEG converter converts the decoded multimedia data into a Moving Picture Experts Group-Transport Stream (MPEG-TS) under the control of the controller, and the wireless interface unit converts the converted MPEG-TS under the control of the controller. This includes sending to outside It is characterized by being carried.

According to a preferred embodiment of the method of operating a digital multimedia system using a multimedia data providing apparatus of the present invention, the first controller extracts a portion of multimedia data of various formats stored in a storage medium according to a user's selection, A decoder decoding the extracted multimedia data under control, and under the control of the first controller, an MPEG converter converts the decoded multimedia data into a moving picture expert group-transport stream (MPEG-TS), Transmitting, by the first air interface unit, the converted MPEG-TS to the second air interface unit; receiving, by the second control unit, the second air interface unit receiving the transmitted MPEG-TS; If the operation command input through the playback command is a video / sound under the control of the second controller Decoding the video stream of the received MPEG-TS into a video signal, audio stream into a voice signal, and the video / audio output unit is the decoded video signal and audio signal under the control of the second controller It characterized in that it comprises a step of outputting.

The method may further include storing, by the second controller, the received MPEG-TS in a personal video recorder (PVR) when the operation command input through the user interface is a recording command.

Hereinafter, a multimedia data providing apparatus, a digital multimedia system using the same, and a method of operating the same will be described in detail with reference to FIGS. 1 to 4. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing the configuration of an apparatus for providing multimedia data of the present invention.

As shown therein, the storage medium 110 stores multimedia data in various formats, and the controller 120 controls to convert the multimedia data stored in the storage medium 110 into MPEG-TS and transmit the same to an external digital device. And a decoder 130 for decoding the multimedia data stored in the storage medium 110 under the control of the controller 120, and the data decoded by the decoder 130 under the control of the controller 120. To the MPEG-TS (Moving Picture Experts Group-Transport Stream) and the MPEG-TS converted by the MPEG converter 140 under the control of the control unit 120 to the outside A wireless interface unit 150 for transmitting and a user interface 160 for generating a signal corresponding to the control unit 120 by a user's operation.

In the multimedia data providing apparatus configured as described above, the storage medium 110 stores multimedia data in various formats, for example, avi, mpg, mov, divx, asf, wmv, and the like.

The decoder 130 decodes the multimedia data stored in the storage medium 110 under the control of the controller 120.

That is, the decoder 130 decodes the multimedia data stored in the storage medium 110 and encoded in a predetermined format. At this time, the decoded data becomes raw data.

The MPEG converter 140 converts the multimedia data decoded by the decoder 130 into MPEG-TS under the control of the controller 120.

That is, the MPEG converter 140 encodes the multimedia data decoded by the decoder 130 into a moving picture expert group (MPEG) among data compression techniques, and then encodes a transport stream defined by MPEG. To multiplex.

In this case, the MPEG converter 140 preferably encodes the decoded multimedia data to MPEG-2, which is a digital broadcasting standard of most digital devices.

The air interface unit 150 transmits the MPEG-TS converted by the MPEG converter 140 to an external digital device under the control of the controller 120.

The wireless interface unit 150 includes a Bluetooth, a Wireless Local Area Network (UWB), an Ultra Wide Band (UWB), a Home RF, and the like.

In the case of the wireless interface unit 150, it is preferable to use Bluetooth, which is a short-range wireless communication standard, but Bluetooth has a limitation in transmission speed in transmitting HD (1920 × 1088) video.

In other words, in order to transmit HD-class (1920 × 1088) video, when a frame is reproduced at 30 frames per second, a transmission speed of about 20Mbps is required, but the maximum transmission speed of Bluetooth is currently only 1Mbps.

Therefore, it is preferable to use a wireless LAN device that satisfies the IEEE.

2 is a flowchart illustrating a method of operating a multimedia data providing apparatus of the present invention.

As shown therein, the controller 120 first checks whether an operation command is input through the user interface 160 (step S100).

When the operation command is input through the user interface 160 as a result of checking in step S 100, it is checked whether the input operation command is a file name display command, and if the operation command is not a file name display command, the operation The function according to the command is performed (step S 110).

When the input operation command is a file name display command, the controller 120 extracts and displays file names of multimedia data of various formats stored in the storage medium 110 (step S 120).

The controller 120 checks whether the user selects some of the displayed file names through the user interface 160 (step S 130), and when selecting a file name, extracts the corresponding file name from the storage medium 110 (step S 130). 140).

Next, the decoder 130 decodes the multimedia data of the file name extracted from the storage medium 110 under the control of the controller 120 (step S 150).

Subsequently, the MPEG converter 140 converts the decoded multimedia data into MPEG-TS under the control of the controller 120 (step S 160).

Subsequently, the wireless interface unit 150 transmits the MPEG-TS to an external digital device under the control of the controller 120 (step S 170).

3 is a block diagram showing the configuration of a digital multimedia system using the apparatus for providing multimedia data of the present invention.

As shown in the drawing, the digital multimedia system 400 of the present invention largely includes a multimedia data providing apparatus 200 and an external digital device 300. Here, although the digital television is taken as the external digital device 300 as an example, various digital devices including an MPEG decoder may be used.

The multimedia data providing apparatus 200 may include a storage medium 210 that stores multimedia data in various formats, and converts the multimedia data stored in the storage medium 210 into MPEG-TS for transmission to the digital television 300. A first control unit 220 for controlling the control, a decoder 230 for decoding the multimedia data stored in the storage medium 210 under the control of the first control unit 220, and a control of the first control unit 220. MPEG converting unit 240 for converting the data decoded by the decoder 230 to a Moving Picture Experts Group-Transport Stream (MPEG-TS) according to the control, and the MPEG conversion under the control of the first control unit 220 A first air interface unit 250 for transmitting the MPEG-TS converted by the unit 240 to the digital television 300, and a corresponding signal to the first control unit 220 by a user's operation User interface It consists of 260.

The digital television 300 includes a second air interface unit 310 for receiving an MPEG-TS transmitted by the first air interface unit 250 and an MPEG- received by the second air interface unit 310. A second control unit 320 that controls storing or outputting TS or video / audio processing, and a PVR (PVR) storing MPEG-TS received by the second air interface unit under the control of the second control unit 320. Video / Audio for video / audio processing MPEG-TS stored in the PVR 330 and MPEG-TS received by the second air interface unit under the control of the video recorder 330 and the second controller 320. And a video / audio output unit 350 for outputting a video / audio processed by the video / audio processor.

In the digital multimedia system configured as described above, the first controller 220 extracts a part of the multimedia data stored in the storage medium 210 according to the signal generated by the user interface 260 and transmits it to the decoder 230.

The decoder 230 decodes the transmitted multimedia data. That is, the multimedia data stored in the storage medium 210 is decoded because it is encoded in a predetermined format.

The decoded multimedia data is input to the MPEG converter 240, and the MPEG converter 240 converts the decoded multimedia data into MPEG-TS under the control of the first controller 220, and then, Transfer to the wireless interface unit 250.

The first air interface unit 250 transmits the MPEG-TS to the second air interface unit 310 under the control of the first controller 220.

The second wireless interface unit 310 receives the MPEG-TS transmitted by the first wireless interface unit 250 under the control of the second control unit 320.

Here, the first and second wireless interface unit 250, 310 is made of Bluetooth (Blue Tooth), Wireless Local Area Network (WLAN), Ultra Wide Band (UWB), Home RF, etc., in particular IEEE. It is preferable to use a wireless LAN that satisfies the 802.11a standard.

That is, a transmission speed of about 20 Mbps is required to transmit an HD (1920 × 1088) video that is played back at 30 frames per second. Therefore, it is preferable to use a wireless LAN of IEEE.802.11a standard that guarantees a transmission speed of up to 54 Mbps. Do.

The second wireless interface unit 310 transmits the received MPEG-TS to the video / audio processor 340 or the personal video recorder (PVR) 330 under the control of the second controller 320.

The PVR 330 stores the MPEG-TS transmitted from the second air interface 310 under the control of the second controller 320.

In this case, the second control unit 320 generates a file name of MPEG-TS, and then records the MPEG-TS in the PVR 330 using the generated file name.

The video / audio processor 340 includes an MPEG decoder, and under the control of the second controller 320, the video stream of the MPEG-TS input from the second air interface 310 or the PVR 330 is As a video signal, the audio stream is decoded into an audio signal.

The video / audio output unit 350 outputs a video signal among the signals decoded by the video / audio processor 340 to a screen and a voice signal to a speaker so that the user can view it.

4 is a flowchart illustrating a method of operating a digital multimedia system using the apparatus for providing multimedia data of the present invention.

As shown therein, first, the first controller 220 checks whether an operation command is input through the user interface 260 (step S 201).

When the operation command is input through the user interface 260 as a result of the checking of step S 201, it is checked whether the input operation command is a file name display command, and when the operation command is not a file name display command, the operation The function according to the command is performed (step S202).

When the input operation command is a file name display command, the first controller 220 extracts and displays file names of multimedia data of various formats stored in the storage medium 210 (step S203).

Next, the first controller 220 confirms whether the user selects some of the displayed file names through the user interface 260 (step S204), and selects the file name from the storage medium 210 when the file name is selected. Extraction (step S205).

Subsequently, the decoder 230 decodes the multimedia data of the file name extracted from the storage medium 110 under the control of the first controller 220 (step S206).

Subsequently, the MPEG converter 240 converts the decoded multimedia data into MPEG-TS under the control of the first controller 220 and transmits the decoded multimedia data to the first air interface 250 (step S207). .

In this case, the MPEG converter 240 encodes the decoded multimedia data into MPEG-2, which is a digital broadcasting standard of most digital devices, and then multiplexes the data using a transport stream defined by MPEG.

When the MPEG-TS is transmitted, the first air interface 250 calls the digital television 300 under the control of the first controller 220 (step S208), and the second radio of the digital television 300 is transmitted. The interface unit 310 transmits a response signal thereto according to the control of the second control unit 320 (step S209).

When the response signal is received, the first air interface unit 250 transmits the MPEG-TS to the second air interface unit 310 (step S 210).

Here, the first and second wireless interface unit 250, 310 is made of Bluetooth (Blue Tooth), Wireless Local Area Network (WLAN), Ultra Wide Band (UWB), Home RF, etc., in particular IEEE. It is preferable to use a wireless LAN device that satisfies the 802.11a standard.

When the second air interface unit 310 receives the MPEG-TS transmitted by the first air interface unit 250, the second controller 320 indicates to the user that the MPEG-TS has been received. Wait for the user's operation command (step S 211).

When an operation command is input through a user interface (not shown), the second controller 320 checks whether the input operation command is a reproduction command (step S 212), and when the operation command is a reproduction command, The MPEG-TS received by the second air interface unit 310 is transmitted to the video / audio processor 340 (step S213).

The video / audio processor 340 decodes the video stream of the MPEG-TS transmitted from the second air interface 310 into a video signal and the audio stream into an audio signal, and then sends the video / audio output unit 350 to the video / audio output unit 350. Transfer (step S214).

The video / audio output unit 350 outputs a video signal among the signals transmitted from the video / audio processor 340 to the screen and the audio signal to the speaker so that the user can view it (step S 215).

On the other hand, if the operation command input in the step S 212 is not a playback command, the second controller 320 checks whether it is a recording command (step S 216), and when the operation command is a recording command, the second air interface. The MPEG 310 stores the received MPEG-TS in the PVR (Personal Video Recorder) 330 (step S 217).

In this case, the second control unit 320 generates a file name of MPEG-TS, and then records the MPEG-TS in the PVR 330 using the generated file name.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications to the above-described embodiments without departing from the scope of the present invention. I will understand.

For example, in the above-described embodiment, a method of viewing multimedia in various formats stored in a multimedia data providing apparatus on a digital television has been described, but the image / audio stream received by the digital television is stored in a storage medium of the multimedia data providing apparatus. It can be recorded and stored semi-permanently.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

As described above, according to the present invention, multimedia data of various formats stored in a storage medium of the multimedia data providing apparatus is extracted, converted into a Moving Picture Experts Group-Transport Stream (MPEG-TS), and then wirelessly transmitted to an external digital device. By doing so, it is possible to watch the multimedia of various formats stored in the multimedia data providing apparatus on a digital television without any additional software or hardware.

Claims (12)

A storage medium for storing multimedia data in various formats; A decoder for decoding multimedia data stored in the storage medium; An MPEG converter for converting the data decoded by the decoder into a Moving Picture Experts Group-Transport Stream (MPEG-TS); An air interface unit for transmitting the MPEG-TS converted by the MPEG converter to the outside; And And a control unit which controls decoding of multimedia data stored in the storage medium, conversion to MPEG-TS, and transmission to the outside. The method of claim 1, The wireless interface unit is a Bluetooth (Blue Tooth) or wireless local area network (WLAN). The method of claim 2, The wireless LAN is a multimedia data providing apparatus, characterized in that the IEEE.802.11a standard. A multimedia data providing apparatus for converting and transmitting multimedia data of various formats into a Moving Picture Experts Group-Transport Stream (MPEG-TS); And And a digital video / audio output device configured to receive and store MPEG-TS transmitted by the multimedia data providing device, or to output a video / audio process. The method of claim 4, wherein The multimedia data providing apparatus, A storage medium for storing multimedia data in various formats; A decoder for decoding multimedia data stored in the storage medium; An MPEG converter for converting the data decoded by the decoder into a Moving Picture Experts Group-Transport Stream (MPEG-TS); A wireless interface unit for transmitting the MPEG-TS converted by the MPEG converter to the digital video / audio output device; And And a control unit which controls decoding of multimedia data stored in the storage medium, conversion of the multimedia data into MPEG-TS, and transmission to the digital video / audio output device. The method of claim 4, wherein The digital video / audio output device, A wireless interface unit for receiving the MPEG-TS transmitted by the multimedia data providing apparatus; A personal video recorder (PVR) for storing the MPEG-TS received by the air interface unit; A video / audio processor for video / audio processing the MPEG-TS stored in the PVR and the MPEG-TS received by the air interface unit; An image / audio output unit configured to output an image / audio processed by the image / audio processor; And And a control unit which receives the MPEG-TS transmitted by the multimedia data providing apparatus and controls to store or output the received MPEG-TS by processing the video / audio. The method according to claim 5 or 6, The wireless interface unit is a digital multimedia system, characterized in that the wireless LAN (Wireless Local Area Network) that satisfies the IEEE.802.11a standard. If the operation command input through the user interface is a file name display command, extracting and displaying file names of multimedia data of various formats stored in a storage medium by the control unit; Extracting, by the controller, multimedia data having a file name selected through the user interface from the storage medium; Decoding, by the decoder, the multimedia data extracted from the storage medium under the control of the controller; Converting, by the MPEG converter, the decoded multimedia data into a Moving Picture Experts Group-Transport Stream (MPEG-TS) under the control of the controller; And And transmitting, by the wireless interface unit, the converted MPEG-TS to the outside under the control of the controller. The method of claim 8, The wireless interface unit is a wireless local area network (WLAN) that satisfies the IEEE.802.11a standard. Extracting, by a first controller, a part of multimedia data of various formats stored in a storage medium according to a user's selection, and decoding the extracted multimedia data by a decoder under control of the first controller; Under the control of the first controller, the MPEG converter converts the decoded multimedia data into a Moving Picture Experts Group-Transport Stream (MPEG-TS), and the first air interface unit converts the converted MPEG-TS into a second air interface. Transmitting to the negative; Receiving, by the second air interface unit, the transmitted MPEG-TS under the control of a second controller; When the operation command input through the user interface is a playback command, the video / audio processor decodes the video stream of the received MPEG-TS into a video signal and the audio stream into a voice signal under the control of the second controller. ; And a video / audio output unit outputting the decoded video signal and an audio signal under the control of the second controller. The method of claim 10, If the operation command input through the user interface is a recording command, the second control unit further comprises storing the received MPEG-TS in a personal video recorder (PVR). Way. The method according to claim 10 or 11, wherein The first and second wireless interface unit is a wireless local area network (WLAN) that satisfies the IEEE.802.11a standard.

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