KR200140952Y1 - Digital video disc player having set top box - Google Patents

Abstract

The present invention relates to a set top box built-in digital video disc player (DVDP). The present invention includes a set-top box for receiving a video and control signal transmitted from the supplier side of the video on demand (VOD), and transmits the service request signal of the viewer to the supplier side. Accordingly, the present invention integrates the terminal function of the video on demand into the digital video disc player, thereby bringing the effect of implementing a low-cost integrated multimedia system.

Description

Digital Video Disc Player with Built-in Set Top Box

1 is a block diagram showing a set-top box built-in digital video disc player according to the present invention.

* Explanation of symbols for main parts of the drawings

40: set top box 41: interface unit

42: S / P conversion unit 44: interface control unit

46: FIFO Memory 48: Demultiplexer

The present invention relates to a digital video disc player (DVDP). In particular, a built-in set top box function enables a low cost integrated system to implement a low cost integrated system. It is about.

In general, home multimedia equipment includes a 'package-based multimedia system' that reads and processes data from a storage system of a package system such as a compact disc (CD) or a digital video disc (DVD), and data received through a communication line. It can be broadly classified into 'communication multimedia system' that processes.

Digital video disc player (DVDP) among packaged multimedia systems has been in the spotlight as the next generation of optical disc player, and each electronic company is speeding up development. This is because the digital video disc player has 6 to 8 times larger memory capacity per side than the compact disc player, the data transfer speed is more than 5 times faster, and it is possible to play high quality and high quality video for more than 2 hours. This is because it is expected to replace the A / V devices being used.

On the other hand, Video On Demand (VOD), which is the core of communication-based multimedia equipment, receives high-quality and high-quality video and control signals transmitted from a server side through a communication line, and viewers receive service request information and the like. By transmitting to the side, viewers can watch a movie or home shopping at a desired time.

An object of the present invention is to provide a digital video disc player with a built-in set top box to implement an integrated multimedia system by embedding a set top box to serve as a home terminal for a video on demand.

The digital video disc player with a built-in set top box according to the present invention for achieving the above object includes a signal processing unit for reproducing data read from a predetermined disc, and receiving data transmitted from a supplier of an on-demand video through a communication line. A system memory for storing data output from the set top box, the signal processing unit or the set top box, decoders for demodulating video / sub-image and audio data by receiving data from the system memory, and mode selection from a user A microprocessor for controlling the system memory and decoders to determine a key and output data output from the signal processor in the normal DVDP mode and data output from the set top box in the set top box mode. Include.

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

Figure 1 shows the configuration of a set-top box built-in digital video disc player according to the present invention. FIG. 1 first includes a configuration of a general digital video disc player. That is, the present invention includes a signal reproducing unit 10 for reproducing image data read out from the disc. The signal reproducing unit 10 is connected with a decoder 12 for demodulating and error correcting a signal to be reproduced, and a buffer memory 14 for temporarily storing the demodulated data is connected to the decoder 12. In addition, the present invention includes a servo 18 and a system controller 16 for controlling the servo 18.

Meanwhile, the present invention includes system memories of a ROM and a RAM 32. And a video decoder 34 for demodulating MPEG2 video data, a subpicture decoder 36 for demodulating subpicture data, and an audio decoder 38 for demodulating audio data. And a microprocessor 20 for controlling each of these components.

The present invention further includes a set top box 40 as shown by a dotted line in such a general digital image disc player. First, the set top box 40 includes an interface unit 41 for receiving a signal supplied from a supplier. The interface unit 41 controls the S / P conversion unit 42 by receiving S / P conversion unit 42 for converting the received serial data into parallel data, and receiving various commands by an interface protocol. The interface control unit 44 for transmitting the service request signal from the viewer to the provider side is connected in parallel. The S / P conversion unit 42 is connected with a FIFO memory 46 for temporarily storing and outputting the converted data, and the FIFO memory 46 has an MPEG stream desired by the user from among the input transport streams. Demultiplexer 48 for selecting and outputting to the system memory 32 and decoders 34 to 38 is connected.

Referring to the operation of the present invention configured in this way in more detail as follows.

First, the viewer enters a key for selecting an operation mode of the system. At this time, the input key is for the general DVDP mode, and when a playback key for reproducing the image is input again from the viewer, the head (not shown) starts reading data recorded on the disc. The information on the image / song contained in the disc is recorded as a sub-picture, and the head first reads this information data and outputs it to the signal processor 10. The information data is signal-processed through a predetermined path (hereinafter described) and then output on the screen. The viewer views the screen and inputs a key for selecting a video title or a song to be watched. The system controller 16 generates a servo control signal to read data at a position based on a key input from the viewer under the control of the microprocessor 20. The servo 18 receives a control signal from the system controller 16 to control focusing / tracking / CLV servo.

When the pickup apparatus is moved to the designated position on the disc by the servo control, the signal reproducing unit 10 receives the data read out from the designated position and reproduces it. The decoder 12 receives digital data reproduced from the signal reproducing unit 10 and demodulates EFM (Eight to Fourteen Modulation) to restore the original data. Then, the error of the restored data is corrected and stored in the buffer memory 14. The data of the buffer memory 14 is stored in the system memory 32 when a request signal is generated from the microprocessor 20. The microprocessor 20 analyzes the data stored in the system memory 32 and controls the video data to be transmitted to the video decoder 34 and the audio decoder 38 according to the type of data.

The video decoder 34 receives the video data compressed by the MPEG2 algorithm from the system controller 32 in this way. The video decoder 34 decompresses the compressed data and outputs the compressed data to the sub-picture decoder 36. On the other hand, the sub-image decoder 36 receives the sub-image data to extend. The sub-image decoder 36 synthesizes the sub-image data into the image data applied from the image decoder 34 and outputs it on the screen. The audio decoder 38 expands and outputs audio data compressed by MPEG2 or DOLBY AC-3 or the like.

The operation in the case of using the general DVDP mode and a key for selecting the set top box mode from the viewer is as follows. When the T1 chip is used, the interface unit 41 receives MPEG image data and general data transmitted in an Asymmetric Digital Subscriber Line (ADSL) method through a twisted pair telephone line. In addition, the interface unit 41 detects a header signal in the MPEG transport stream. The interface unit 41 should be redesigned appropriately when the communication cable or protocol to be connected is changed. In the beginning of the set top box mode, when menu information is transmitted from the supplier side, the menu information is displayed on the screen through a predetermined path. The viewer inputs a key for selecting a desired video title or service information from a menu displayed on the screen. The key input from the viewer is supplied to the interface controller 44 through the microprocessor 20. The S / P converter 42 converts serial data from the interface 41 into 8-bit parallel data under the control of the interface controller 44. The FIFO memory 46 receives parallel data from the S / P converter 42 and temporarily stores the parallel data. The stored data is output to the demultiplexer 48 under the control of the microprocessor 20. The demultiplexer 48 outputs an MPEG stream selected by the user. The data output from the demultiplexer 48 is then output to the system memory 32 and the decoders 34 to 38, where it is output on the screen through a process as described in the DVDP mode.

As such, the present invention integrates a terminal function of a video on demand into a digital video disc player, thereby bringing the effect of implementing a low-cost integrated multimedia system.

Claims (2)

A digital video disc player (DVDP), comprising: a signal processor for reproducing data read from a predetermined disc; A set top box configured to receive data transmitted from a supplier side of a video on demand through a communication line; A system memory for storing data output from the signal processor or the set top box; Decoders for demodulating video / sub-video and audio data by receiving data from the system memory; And determining the mode selection key input from the user, so that the data output from the signal processor in the DVDP mode and the data output from the set top box in the set top box mode are output on the screen. And a microprocessor for controlling the decoders. The apparatus of claim 1, wherein the set top box comprises: a communication cable; A serial / parallel converter for converting serial data received through the communication cable into parallel data; A FIFO memory for temporarily storing parallel data from the serial / parallel converter; A demultiplexer receiving data from the FIFO memory and outputting an MPEG stream selected from a dual user; And an interface controller configured to control the serial / parallel conversion unit by receiving a system control surface string from the supplier side and to transmit a signal for a service request of a user transmitted from the microprocessor to the supplier side. Top box built-in digital video disc player.