KR0166735B1 - Multimedia compound - Google Patents

Abstract

The present invention relates to a hybrid multimedia device that can be used to integrate the MPEG-based products into a set. The present invention enables common processing of bit string data having a PS or TS structure based on MPEG that is generated externally or internally by using MPEG-related parts in common. Accordingly, the present invention provides an effect of expanding a function as compared to the conventional one, in which a function that can be performed in one product is limited.

Description

Hybrid Multimedia Device

1 is a block diagram showing a hybrid multimedia device according to a preferred embodiment of the present invention.

2 is a view showing the appearance of the hybrid multimedia device of FIG.

* Explanation of symbols for main parts of the drawings

23: Mode selector 24: TS decoder

25, 26: MPEG-2 decoder unit 27: NTSC encoder unit

28: D / A converter 29: RF modulator

30: microcomputer 31: display unit

The present invention is a set-top box (set-) for other media having MPEG standards such as video CD, CD-ROM, Digital Satellite Broadcasting Receiver (DBS), Video On Demand (VOD), Cable TV, etc. The present invention relates to a hybrid multimedia device composed of a top box).

Currently, moving picture expert group (MPEG) technology is attracting attention in the multimedia field and is becoming a standard in the visual field. However, media having conventional MPEG standards can only perform their respective independent functions.

Accordingly, an object of the present invention is to provide a hybrid multimedia device that can perform the functions of media having MPEG standard.

In order to achieve the above object, the hybrid multimedia apparatus of the present invention is a device for integrating and performing functions of media having an MPEG standard, and has a data structure having one of a plurality of signal formats presented in the MPEG standard, The microcomputer controls the operation of each component to perform the function of the media selected by the user among the media, and the media correspond to the media, and under the control of the microcomputer, decoding data based on the MPEG standard is possible. Based on the common decoding part for the signal generating means for generating a signal in the form of a signal and the MPEG standard, decoding for generating and restoring the generated signal in common regardless of the signal format under the control of the microcomputer. Means;

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

1 is a block diagram of a hybrid multimedia device according to an embodiment of the present invention. The hybrid multimedia apparatus shown in FIG. 1 includes a pickup unit 12 and a servo of the pickup unit 12 for reading out signals from the disk 11 of a video CD or an audio CD mounted on a turntable (not shown). The servo unit 13 for controlling the operation, the signal processor 14 for extracting and demodulating the EFM signal from the high frequency signal read out through the pickup unit 12, and the format control unit 15 for outputting the demodulated data according to the format. It is provided.

FIG. 1 also includes a first tuner 16 for tuning a cable broadcast signal received through a CATV antenna and a second tuner for tuning satellite broadcast signals received through a satellite antenna. 18, and a digital modulator 17 for digitally modulating the selected cable broadcast signal. A digital demodulator 19 is connected between the second tuner 18 and the digital modulator 17, which can digitally demodulate the selected satellite broadcast signal and the cable broadcast signal.

The digital demodulator 19 is connected to an FEC decoder 20 for detecting and correcting errors in the demodulated data. Meanwhile, the apparatus of FIG. 1 includes a built-in modem (MODEM) 21 and an ADSL processor 22 for signal processing so as to be provided through a telephone line connecting a VOD service. The mode selector 23 is connected to the ADSL processor 22, the format controller 15, the FEC decoder 20, and the like.

The mode selector 23 is connected to a TS decoder 24 for decoding data of a transport stream (TS) structure based on MPEG. The TS decoder 24 is connected to MPEG-2 decoders 25 and 26 for decoding video and audio signals, respectively, encoded according to the coding scheme presented in MPEG-2, which gives MPEG-1 scalability. The D / A converter 28 connected to the MPEG-2 audio decoder unit 26 converts the decoded audio signal into an analog signal and outputs it through a jack connected to the audio line terminal of the TV or outputs it through a mounted speaker. do.

The NTSC encoder 27 connected to the MPEG-2 video decoder 25 is encoded so that the decoded video signal can be reproduced and viewed through a TV, and then modulated by the RF modulator 29 into an RF signal. The microcomputer 30 interconnected with each component controls the overall operation of each component. The microcomputer 30 is also configured to be connected to a display unit 31 for screen displaying the selected product.

2 is a view showing the external appearance of the hybrid multimedia device of FIG. FIG. 2 (a) is a front view of a set for displaying a selected product function through a remote controller or key metrics so that a user can know and selecting one of a plurality of product functions such as a video CD, a digital DBS, and a VOD. The key matrix portion and the tray portion for mounting the CD are located. FIG. 2 (b) is a rear view of the telephone set jack (RJ-11 JACK) connected to a VOD telephone line for receiving VOD service, a satellite antenna for satellite broadcasting, and a CATV for cable broadcasting reception. A connector connected to each antenna, a bit string input terminal for receiving a bit string of a CD-ROM device, a video and audio L, R jack, and a dedicated channel for connecting a video and audio line terminal on the VCR side. Jacks connected to (CH 3/4) are located.

The operation of the hybrid multimedia apparatus according to the present invention configured as described above will be described in more detail.

All of the products presented in this embodiment are based on MPEG, and a compression method for encoding video and audio signals is used. For example, currently commercially available video CD (MPEG-1 player) products are largely composed of a servo unit, pickup unit, microcomputer, video and audio decoding unit, and output processing unit. These products simply play CDs created in MPEG-1 and can only watch video and listen to audio.

On the other hand, the Digital DBS (Digital DBS), which has been recently launched mainly in the United States, has superior image quality and bit rate than MPEG-1, and receives several weak radio waves from satellites in the air. It is a product enjoyed by users through the system such as digital demodulation unit, FEC decoder, TS decoder, video and audio MPEG decoder, digital NTSC encoder, audio D / A converter, RF modulator and so on.

However, these two products not only include the decoding part for decoding video and audio based on the MPEG standard, but also the MPEG-2 video / audio decoder part used in the digital satellite broadcasting receiver also has the MPEG-1 bit stream. This makes it possible to embed MPEG-1 CD players in video CDs that are now completely separate products into digital satellite broadcast receivers. Thus, the present invention has shown a composite multimedia device using the advantages.

In FIG. 1, when the user selects one of a plurality of product functions through the remote controller or the keymex, the microcomputer 30 recognizing this key input controls the operations of each component to perform the selected product function. The microcomputer 30 also displays the selected product on the display unit 31 so that the user can recognize it. If the user selects to watch CATV, the first tuner unit 16 tunes a desired broadcast signal from among cable broadcast signals received through a connector connected to the CATV antenna.

The tuned cable broadcast signal is input to the digital modulator 17 and digitally modulated. The digitally modulated cable broadcast signal is input to the digital demodulation unit 19. On the other hand, when the user wants to receive satellite broadcasting through the satellite antenna, the second tuner 18 tunes a desired broadcast signal among satellite broadcast signals received through a connector connected to the satellite antenna. The tuned satellite broadcast signal is directly input to the digital demodulation unit 19. The digital demodulator 19 receives a broadcast signal of one of the cable broadcast signal modulated by the digital modulator 17 and the satellite broadcast signal tuned by the second tuner 18 according to the control of the microcomputer 30 to receive the digital signal. Perform demodulation.

The demodulated broadcast signal is input to the FEC decoder 20. The FEC decoder 20 detects an error in the input signal and corrects the error. The error corrected signal is input to the mode selector 23. The mode selector 23 can also input bit string data applied from a CD-ROM device which is an external device. That is, as shown in FIG. 2 (b) located at the rear of the set, a CD-ROM device, which is an external device, is connected to the bit string terminal, and bit string data supplied through the bit string terminal from the connected CD-ROM device. It is input to the mode selector 23. This bit string data has a program stream (PS) of MPEG-1 (ISO11172) or a TS (Transport Stream) structure of MPEG-2 (ISO13818).

On the other hand, when the user wants to receive the VOD service, the contents are received by the internal modem (MODEM) 21 through the connected telephone line. The contents downloaded through the modem 21 are signal-processed by the ADSL processor 22 for signal processing and then input to the mode selector 23. It also has a data structure of PS or TS.

In addition, when playing a CD to view a desired image or to listen to audio, the pickup unit 12 operates to shoot a laser beam in a corresponding area of the disk 11 rotating at a predetermined speed as an electrical signal. It converts and outputs a high frequency signal. At this time, the servo unit 13 controlling the servo operation of the pickup unit 12 performs a servo control operation while interfacing information with the microcomputer 30.

The signal processor 14 extracts and demodulates the EFM signal from the high frequency signal read out through the pickup unit 12. The demodulated data is input to the format control unit 15. The format controller 15 controls the demodulated data applied from the signal processor 14 according to the format of the mode selector 23, the MPEG-2 video decoder 25, and the D / A converter 28. Output to one of That is, the format controller 15 outputs to the mode selector 23 if the input data is an MPEG-based PS structure, and if the MPEG-based PES (Packetized Elementary) structure is the MPEG-2 video decoder ( 25).

The format controller 15 immediately outputs the input data to the D / A converter 28 when the input data is PCM audio data. The mode selector 23 is one of a CD-ROM device, a format controller 15, an FEC decoder 20, and an ADSL processor 22, which are external devices connected to the bit string terminal (see FIG. 2 (b)). Is selected according to the control of the microcomputer 30, and outputs data having a PS or TS structure based on MPEG input from the selected component block to the TS decoder 24.

The TS decoder 24 decodes the data input from the mode selector 23 and outputs it. Data having a PS structure can also be processed by the TS decoder 24. That is, since MPEG-2 is an international standard established as a higher concept of MPEG-1, processing of the PS structure of MPEG-1 is possible. The video data decoded by the TS decoder 24 is input to the MPEG-2 video decoder 25 and the audio data is input to the MPEG-2 audio decoder 26.

The MPEG-2 video decoder 25 decodes the video data of the PES structure reproduced from the input CD to the video data decoded by the TS decoder 24 according to the MPEG-2 standard. The MPEG-2 audio decoder 26 decodes the input audio data according to the MPEG-2 standard and converts the audio data into an analog signal by the D / A converter 28.

The NTSC encoder 27, which receives the video data decoded by the MPEG-2 video decoder 25, encodes in the NTSC format, which is a broadcast method that can be displayed on a TV. The RF modulator 29 which receives the encoded video signal and the audio signal converted into an analog form outputs the RF signal through the video terminal connected to an external TV terminal.

The D / A converter 28 outputs an audio signal converted into an analog form through an audio terminal connected to a built-in speaker or a TV side terminal so that the audio signal can be listened to. The NTSC encoder 27 also outputs the encoded video signal directly through the TV-side connection terminal without RF modulation.

As described above, the present invention relates to a hybrid multimedia device, and a video CD device or a digital DBS receiver has limited functions to perform while the price of various MPEG-related ICs used therein is quite high. Thus, the present invention uses MPEG-related parts in common and makes various products capable of performing functions on one set.

Claims (10)

An apparatus for integrating and performing functions of media having an MPEG standard, the apparatus comprising: media having a data structure in one of a plurality of signal formats presented in the MPEG standard; A microcomputer controlling the operation of each component to perform a function of a medium selected by a user among the media; Signal generating means corresponding to the media, and generating the data of the media under the control of the microcomputer as a signal capable of decoding processing based on the MPEG standard; And decoding means for commonly decoding and restoring the generated signal irrespective of the signal format, based on the fact that the decoding part is common to the signal formats presented in the MPEG standard. The hybrid multimedia medium according to claim 1, wherein the media are at least two media having MPEG-1 standard program stream (PS), PES, and MPEG-2 standard transport stream (TS) structures. device. 3. The signal generating means according to claim 2, characterized in that the signal generating means has a bit string terminal for directly connecting an external CD-ROM device and the decoding means to transfer bit string data generated in the CD-ROM device to the decoding means. Hybrid Multimedia Device. 4. The apparatus according to claim 2 or 3, wherein if the medium is a video CD or an audio CD, the signal generating means comprises: a pickup section for detecting a signal recorded on the CD; A servo unit for controlling the servo operation of the pickup unit; A signal processor for demodulating the signal detected by the pickup unit; And a format control unit for outputting the demodulated signal to the decoding unit in accordance with a signal format. The apparatus of claim 2 or 3, wherein the signal generating means comprises: a plurality of connectors connected to each of a CATV antenna and a satellite antenna; A first tuner unit for tuning a desired broadcast signal among cable broadcast signals received through the connector; A second tuner unit for tuning a desired broadcast signal among satellite broadcast signals received through the connector; A digital modulator for digitally modulating the cable broadcast signal tuned by the first tuner; And a digital demodulator for digital demodulating one broadcast signal selected from the satellite broadcast signal tuned by the second tuner and the cable broadcast signal modulated by the digital modulator under the control of the microcomputer. . 6. The hybrid multimedia apparatus of claim 5, wherein the digital demodulator is connected to an FEC decoder for detecting an error in the digital demodulated signal and correcting the error. 4. The apparatus according to claim 2 or 3, wherein if the medium is video on demand, the signal generating means comprises: a jack connected to a telephone line for VOD; A modem receiving a VOD service through the telephone line jack; And an ADSL processing unit for processing contents input through the modem. The apparatus of claim 5 or 7, wherein the decoding means comprises: a TS decoder for receiving and decoding a signal having a TS structure of the MPEG-1 standard to the PS-1 of the MPEG-1 standard generated by the signal generation unit; An MPEG-2 video decoder unit for receiving a signal having an MPEG-1 standard PES structure generated by the signal generation unit and video data decoded by the TS decoder unit and decoding the MPEG-2 standard; An MPEG-2 audio decoder for receiving audio data decoded by the TS decoder and decoding the audio data according to MPEG-2 standards; An encoder for converting the video data decoded by the MPGE-2 video decoder into a television broadcast format; A D / A converter for converting video data decoded by the MPEG-2 audio decoder into an analog signal; And an RF modulator for modulating and outputting the video signal output from the encoder and the audio signal output from the D / A converter. The hybrid multimedia apparatus as claimed in claim 8, wherein a mode selection unit for outputting a signal generated from a media selected outside of at least two media to the decoding means is connected between the signal generating means and the decoding means. The hybrid multimedia apparatus as claimed in claim 1, wherein the micom is connected with a display unit for displaying a screen so that a user can know the media type of the selected MPEG standard.