KR20050045171A - Method for remaking and searching screen in the media player - Google Patents

Abstract

 The present invention relates to a multimedia content playback system, and more particularly, to search for and play a desired screen in a media transmitter that decodes video data transmitted in real time from a randomly accessible recording medium-based storage device and outputs it through an audio and visual (AV) device. It is about a method.

Description

Method for remaking and searching screen in the media player}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia content playback system. In particular, the present invention provides a method for retrieving and playing a desired screen from a media transmitter that decodes video data transmitted in real time from a randomly accessible recording medium-based storage device and outputs it through an audio and visual (AV) device. It is about a method.

Recently, with the development of the electric and electronic fields and information and communication fields, each home is equipped with a computer system and can receive various information through the Internet. In particular, computer users can customize audio content files (MP3, WAV, etc.), video content files (MPEC, AVI, etc.), image content files (JPEC, TIFF, BMP, etc.) and text content files (TXT, DOC, etc.). You can choose to be provided according to. On the other hand, homes tend to have high-quality large screen TVs or audio devices that are superior in performance to those of monitors and speakers used in computer systems. Accordingly, users are increasingly tending to enjoy various multimedia contents stored in the computer by connecting the computer and various AV devices.

In response to the above trend, the present applicant can easily access the multimedia data that the user wants through the media transmitter and a media transmitter that receives and decodes the multimedia contents in real time from a computer system and outputs them through an AV (Audio and Visual) device. We developed an application program that can register and edit various multimedia data stored in the computer. Accordingly, when the user registers various data stored in the computer in the memory according to the application program, the user can view the registered multimedia data through the media transmitter through the AV system.

In general, the media transmitter needs a trick mode (eg, fast forward, rewind, etc.) to quickly find a desired screen so that a user can conveniently watch a video. However, the conventional trick mode function can be relatively easily implemented in a device that plays a video stored in a randomly accessible storage medium such as a tape-based VTR, a DVD, or a PC, but a video transmitted by streaming (STREAMING) through a wired or wireless network. It has been difficult to implement in VOD terminals or network type media transmitters that receive and play files.

The present invention has been proposed in the background as described above, and an object of the present invention is to provide a screen search playback method in a media transmitter for outputting real-time video data transmitted from a hard disk (HDD) based storage device through an AV system.

According to an aspect of the present invention for achieving the above object, in the screen search playback method of the media transmitter for outputting video data transmitted in real time from a random-accessible storage medium based storage device to the A / V system,

Displaying first display information corresponding to the entire length of the video and second display information corresponding to a relative position of the video data currently reproduced in the first display information on a predetermined portion of the screen when the trick mode operation command is received; (2) displaying second display information changed by the movement information in the input direction when the movement information for moving the display information in an arbitrary direction by a predetermined interval, and calculating the position of the video data corresponding to the changed second display information; And requesting the storage device for the still picture corresponding to the calculated position, receiving the still picture in response to the storage device, and displaying the changed picture on the screen by a predetermined interval in a predetermined direction. Determining whether the movement information is inputted; and if the movement information is not input, the displayed stop Receiving video data of the face when the received reproduction command to a starting point from the still image by making a request to the storage device as the response to the input video data in real-time comprises the step of displaying on the screen.

According to this aspect, the user can search for a desired screen in a media transmitter that receives and plays video data transmitted in a streaming method from a randomly accessible recording medium-based storage device. I can appreciate it.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

In describing the present embodiment, the navigation screen information refers to graphic user interface information, and the additional information means, for example, a description of a genre and a running time, a director, a leading actor, and a story about a certain movie. In addition, a title means the name given to a content file.

1 is a block diagram schematically showing a multimedia content playback system according to the present invention. As shown in the drawing, the multimedia content reproducing system includes a storage device 10 for transmitting navigation screen information, additional information, and a multimedia content file, and is transmitted from the storage device 10 in real time according to an operation signal input by the remote controller 40. And a media player 20 which receives the navigation screen information, the additional information, and the multimedia content file and outputs the same through the AV system 30.

The storage device 10 preferably compresses and stores multimedia content files such as movies, music, pictures, etc., but preferably uses a hard disk drive (HDD) or the like as a randomly accessible recording medium. Furthermore, the storage device 10 preferably includes a wired / wireless communication unit capable of supporting wired / wireless network communication. In one embodiment, the storage device 10 may be implemented as a computer system or a personal video recorder (PVR).

The media transmitter 20 classifies the multimedia content files transmitted in real time from the storage device 10 into file types such as video, audio, and text, and decodes each data through a video / audio decoder. It is desirable to be. In addition, the media transmitter 20 is preferably provided with a remote control receiver for receiving a remote control signal.

2 is a block diagram showing the configuration of a set-top box 200 to receive a multimedia content file in real time from the computer system 100 according to an embodiment of the present invention.

The computer system 100 as an example of the storage device 10 according to the present invention includes a display portion 105 for outputting various display data processed by the controller 130 as a liquid crystal display or LCD display. The operation unit 110 is a user interface device such as a keyboard and a mouse, and is used for inputting additional information of a content file. Here, the additional information of the content file may vary depending on the type of the content file, but basically includes a representative image representing each content file and annotation information for describing each content file. The Internet connection unit 115 is a network connection device such as a modem and interfaces data transmitted and received between the external network and the computer system 100.

The memory 120 includes various control program data for controlling the operation of the system, as well as multimedia such as movies / music / photos stored in the HDD 140 so that the user can easily access desired multimedia data through the set-top box 200. Stores application data that allows you to register and edit files. In addition, the memory 120 stores a plurality of independent background data constituting a navigation screen according to an embodiment of the present invention. In an embodiment of the present invention, the navigation screen may include a background screen and a representative image overlapping the background screen.

The controller 130 controls the overall operation of the computer system 100 based on the control program data stored in the memory 120. For example, the controller 130 synthesizes a representative image of each title selected by a user based on an application program installed to implement the present invention on a background screen, constructs a navigation screen, and converts it into an MPEG2 I-frame format and stores the converted screen. A metadata file is generated that includes content information of each title constituting the navigation screen, access information for accessing the additional information of the title, and the like.

In one embodiment, the metadata file may be composed of only ID information of representative images constituting the navigation screen. The metadata file is transmitted to the set top box 200 through the wired / wireless communication unit 145 together with the navigation screen information. Accordingly, when the user selects any representative image constituting the navigation screen displayed on the TV screen through the set top box 200, the ID of the selected representative image is fed back to the computer system 100, whereby the controller 130 is fed back. The content file corresponding to the ID may be accessed and transmitted from the HDD 140.

According to a characteristic aspect of the present invention, when the screen search request according to the trick mode operation is performed from the set-top box 200 through the wire / wireless communication unit 145, the controller 130 searches for the corresponding content still image and then / or It also performs a control role of transmitting to the set-top box 200 through the wireless communication unit 145. Here, the content still image search may be performed through location information of video data transmitted from the set-top box 200.

The HDD 140, which is an auxiliary memory device, stores various content files registered / edited according to an application program by a user, and a predetermined area is classified into a database under the control of the controller 130 to add additional information on each title. Used for registration.

The wired / wireless communication unit 145 serves to transmit and receive data with the set-top box 200. The wired / wireless communication unit 145 transmits a data access command transmitted from the set-top box 200 to the control unit 130, as well as a content file or additional information and navigation screen information accessed by the control unit 130. To convert to suit the wired / wireless communication protocol transmits to the set-top box (200). Here, the wireless communication unit may be implemented as a wireless LAN using an 802.11-based protocol.

Additionally, the computer system 100 according to the present invention is an external storage medium interface unit 135 for interfacing data transmitted and received between an external flash memory device (not shown) such as a memory stick and the computer system 100. ) May be further included.

Set-top box 200 as an example of a wireless receiver according to an embodiment of the present invention includes a remote control receiver 205 as a user interface means. The remote control receiving unit 205 receives and decodes a remote control radio signal transmitted from a remote control by a user's operation and outputs it to the control unit 230. The user I / F unit 210, which is another user interface means, is a manipulation panel located in front of the set and includes a plurality of buttons and indicator lights. The user I / F unit 210 also outputs a signal generated by a button operation to the controller 230.

The wire / wireless communication unit 215 transmits various access request signals transmitted from the control unit 230 to the computer system 100, and transmits stream information transmitted from the computer system 100 to the control unit 230. State plays a role. Here, the wireless communication unit may be implemented as a wireless LAN using an 802.11-based protocol.

In the memory 220, control program data for controlling the set-top box 200 is stored, and the flash memory controlled by the controller 230 and data generated during the control operation of the set-top box 200 are temporarily stored. And an SDRAM in which various stream information transmitted from the computer system 100, for example, navigation information, a content file, additional information, and the like are stored.

According to a characteristic aspect of the present invention, the flash memory stores viewer program data for outputting navigation screen information, additional information, and multimedia contents stored in the computer system 100 through an AV system such as TV or audio. Further, the flash memory stores the trick mode execution program data which transmits a still picture request signal according to the trick mode command signal to the computer system 100 and shows a still picture input through the TV screen.

The controller 230 controls the overall operation of the set-top box 200 according to a user command input from the remote controller receiver 205 or the user I / F unit 210, as well as the stream information transmitted from the computer system 100. Analyze the control to control the system to be transmitted to each decoder (235, 240, 245).

More specifically, the video decoder 235 decodes and outputs a video content file, navigation screen information, and MPEG 2 I-frame format data as an MPEG-2 decoder.

The OSD processor 240 processes additional information such as text input under the control of the controller 230, outputs the information to the video mixer 250, and the video mixer 250 controls the video decoder 235. Decoded video information and additional information can be mixed and output on one screen. In this way, the video signal output through the video mixer 250 is encoded into a composite video signal according to NTSC or PAL method through a video encoder and applied to the AV system. The video mixer 250 and the video encoder will be defined as a video output unit in the present invention.

The audio decoder 245 decodes and outputs an audio content file (MP3 file) input under the control of the controller 230, and the audio output unit 255 converts the audio decoded data into analog data to perform audio-left and It is applied to the AV system through the light terminal.

FIG. 3A illustrates a multimedia content service process according to an embodiment of the present invention, and FIG. 3B illustrates an example of a screen displayed on an AV system according to a screen search operation of a media transmitter.

3A and 3B illustrate a video output process performed by the set-top box 200 which receives navigation screen information, additional information, and various multimedia content files from the computer system 100 and outputs them to a TV receiver according to a user's manipulation. It is.

Referring to FIG. 3A, first, a user connects a computer system 100, a set-top box 200, a set-top box 200, a TV, and connects power to each device using a wired / wireless LAN and a video terminal. When the system 100 establishes a wired or wireless network connection with the set-top box 200, the set-top box 200 displays a navigation screen for selecting music, video, photo, etc. on the TV set as shown in FIG. 3A.

After that, when the user selects the video menu, a navigation screen for selecting a movie, personal video, or other video is displayed. Then, when the user selects the movie menu, a navigation screen for the movie list is displayed.

Then, when the user selects the image of the mutt in the movie list, the control unit 230 transmits a signal to the computer system 100 to request to play the video data on the mutt through the wire / wireless communication unit 215. Subsequently, when the computer system 100 accesses and transmits the video file related to the mutt, the set top box 200 receives the input and displays it on the TV receiver. As shown, the selected video is played on the main screen of the TV set, and the sub-screen overlaid on a part of the main screen displays the first display information corresponding to the entire length of the selected video and the video data currently played within the first display information. Second display information corresponding to the relative position is displayed. In the present embodiment, the first display information is implemented by the display window 31 and the entire video playback time 32, and the second display information is the playback time of the video data currently being played back on the display bar 51 and the main screen. Although the present invention is implemented at 52, the present invention is not limited thereto and may be implemented as a bar graph.

Referring to FIG. 3B, when a user selects a trick mode while viewing a video while the user is watching a video, the controller (230 of FIG. 2) may display the display window 31 corresponding to the full length of the video. And the display bar 51 corresponding to the relative position of the video data currently being played back and the playback time 52 of the video data currently being played in the video full playback time 32 and the display window 31. After that, when the user moves the position of the display bar 51 forward by a predetermined interval, the controller 230 displays the display bar 51a and the playback time 52a changed according to the moving direction and the moving information. Thereafter, when the still image request signal corresponding to the changed position of the changed display bar 51a is input, the controller 230 calculates the position information of the video data corresponding to the changed position of the changed display bar 51a, and calculates the calculated position information. Requests a still picture corresponding to the location information to the computer system 100 receives the still picture in response to the display and displays it on the screen. Accordingly, the user can check the contents of the still image corresponding to the position of the display bar 51a, so that the user can watch the video from the desired part. Of course, the user may request a still image corresponding to the changed position of the changed display bar by changing the position of the display bar 51a when the displayed still image is not the desired portion.

4 is a flowchart of a screen search reproduction operation of a set-top box receiving a multimedia content file from a computer system according to an embodiment of the present invention.

First, the user connects the computer system 100, the set-top box 200 and the A / V system, sets up a wired / wireless network between the computer system 100 and the set-top box 200, as described above with reference to FIG. 3A. Follow the selection menu displayed on the navigation screen to select the video you want to watch. The controller 230 requests the computer system 100 to play the video file selected by the user and displays the video data transmitted in response to the video data through the A / V system (S41). Thereafter, the controller 230 determines whether a trick mode operation command is input during video playback (S42), and when a trick mode operation command is input, the first display information and the first display corresponding to the entire length of the video are displayed on a predetermined portion of the screen. In operation S43, the second display information corresponding to the relative position of the video data currently being reproduced is displayed. At this time, in one embodiment, the control unit 230 may be implemented so that the user can watch the video through the main screen by continuing to output the video data transmitted from the computer system 100 to the A / V system. In an exemplary embodiment, the controller 230 may be configured to output only the still image output at the time when the trick mode command is input, without outputting the moving image data transmitted from the computer system 100 to the A / V system.

Subsequently, the controller 230 determines whether movement information for moving the second display information by a predetermined interval in a predetermined direction is input (S44), and when the movement information is input, the second display information changed by the movement information in the input direction. (S45). Here, if the movement information is not input within a predetermined time, the controller 230 displays the moving image data transmitted from the computer system 100 through the A / V system. Thereafter, the controller 230 calculates the position of the moving image data corresponding to the changed second display information (S46), requests the still image of the calculated position from the computer system (S47), and receives the still image in response. This is displayed on the screen (S48).

Here, since the still image displayed on the TV receiver may not be a part desired by the user, the controller 230 determines whether movement information for moving the second display information changed by the user in a predetermined direction by a predetermined interval is input. (S49). As a result of determination, when the movement information is input, the controller 230 performs steps 45 to 48 to display a still image corresponding to the changed position of the second display information on the screen. Subsequently, if the movement information is not input, the controller 230 determines whether a video reproducing command having the displayed still image as a starting point is input (S50). As a result of determination, when a moving picture playback command is inputted as the starting point of the displayed still picture, the controller 230 requests the moving picture data from the still picture to the computer system (S51) and receives the corresponding moving picture data in response thereto and displays it on the screen. (S52).

As described above, the media transmitter according to the present invention can search for a desired still image while displaying video data transmitted from a randomly accessible recording medium-based storage device through an AV system, thereby allowing a user to enjoy a video more conveniently. That has a useful effect.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, it should be interpreted by the claims described to include many such variations.

1 is a block diagram schematically showing a multimedia content playback system according to the present invention.

2 is a block diagram illustrating a configuration of a set-top box that receives a multimedia content file in real time from a computer system according to an embodiment of the present invention.

3A illustrates a multimedia content service process according to an embodiment of the present invention.

3B is a flowchart of a screen search play operation of a media transmitter receiving a multimedia content file from a computer system according to an embodiment of the present invention.

4 illustrates an example of a screen displayed on an AV system according to a screen search operation of a media transmitter.

Claims (3)

In the screen search playback method of a media transmitter for outputting video data transmitted in real time from a storage medium based storage device that is randomly accessible to the A / V system, Displaying first display information corresponding to an entire length of a video and second display information corresponding to a relative position of video data currently being reproduced in the first display information when a trick mode operation command is received; Displaying second display information changed by movement information in a direction inputted when movement information for moving the second display information by a predetermined interval in an arbitrary direction; Calculating position information of the video data corresponding to the changed second display information; Requesting the storage device for the still image corresponding to the calculated position information, receiving the still image in response to the storage device, and displaying the still image on the screen; Determining whether movement information for moving the changed second display information by a predetermined interval in an arbitrary direction is input; If moving information is not input, determining that the moving picture is received as a starting point from the displayed still picture and requesting the moving picture data from the still picture to the storage device and receiving the moving picture data in response to the moving picture; Screen search playback method of the media transmitter comprising a. The method of claim 1, wherein the first display information includes a display window and an entire video playing time. The method of claim 1 or 2, wherein the second display information includes a display bar and a playing time of video data currently being played.