KR20000033736A - Channel reception interface unit of digital satellite receiver - Google Patents

Abstract

PURPOSE: A channel reception interface unit of a digital satellite receiver is to allow a single satellite receiver to have a compatibility capable of receiving satellite signals having different digital satellite rules. CONSTITUTION: A channel reception interface unit comprises: a PCMCIA(Personal computer memory card international association) slot(200); a channel reception module(100) having a tuner applicable to respective satellite rules, for interfacing a satellite signal tuned by the tuner as a signal capable of being input to the PCMCIA slot; and a satellite processing module(300) for processing a satellite signal provided through the PCMCIA slot as a signal capable of being displayed on screen. The channel reception module a transmission stream interface(120) interfaces a transmission stream data of a broadcasting signal of a channel received through the tuner to be output to the PCMCIA slot.

Description

Channel receiving interface device of digital satellite broadcasting receiver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital satellite broadcast receiver, and more particularly, to a channel receiving interface device of a digital satellite broadcast receiver having an interface function so that a satellite broadcast signal having a different satellite broadcast signal can be received by one satellite broadcast receiver.

Satellite broadcasting transmits broadcast signals from ground stations (broadcasting earth stations) using satellites (communication satellites) located at altitudes of several tens to hundreds of kilometers above the earth's surface, providing broadcast signals to a wider area. It refers to a broadcasting system capable of directly receiving a satellite broadcasting signal transmitted from a satellite housing through a satellite broadcasting antenna. In such a satellite broadcasting system, when a satellite broadcasting signal is received through a satellite broadcasting antenna, the signal is restored to a digital broadcasting signal in the form of a transport stream in a packet unit through a process of conversion to IF (Intemediate Frequency), demodulation, and error correction. The reconstructed digital broadcast signal is extracted from a broadcast signal of a selected channel among the digital broadcast signals received through a transport demultiplexor process, and then the extracted broadcast signal is decoded by a MPEG (Motion Picture Expert Group) method and displayed. It is configured to provide to the device.

The satellite broadcasting receiving system has a different feature from the conventional terrestrial broadcasting, and thus can receive a lot of channel information even in a narrow band, can solve the astigmatism area, and also provide program guide information for each channel. It is provided with a feature that allows the user to more conveniently select the desired broadcast program or channel by referring to the program guide screen for each channel.

1 is a block diagram of a general digital satellite broadcasting receiver, which is provided by a tuner and a demodulator 10, a tuner and a demodulator 10 that tune and demodulate a channel selected by a user and restore and provide a transport stream. A demultiplexer 11 which extracts and provides only a signal of a predetermined channel from a transport stream, an MPEG decoder 12 which decodes and provides a signal of a predetermined channel provided by the demultiplexer 11, and tuning and tuning a predetermined channel Program guide information provided by the digital satellite broadcasting provided by the control unit 13, the menu generation unit 14 storing a predetermined menu screen format, and the control unit 13 to control the overall processing of a signal. Memory 15 for storing, D / A converter 16 for converting the decoded audio signal provided from MPEG decoder 12 into an analog signal and outputting to a speaker, MPEG decoder 12 The NTSC encoder 17 converts the decoded video signal provided by the NTSC signal into the NTSC signal, and the menu screen provided by the menu generator 14 and the video signal provided by the NTSC encoder 17 under the control of the control unit 13. It is composed of an image synthesizing unit 18 which is mixed and provided to the display side.

A detailed operation description of the digital satellite broadcast receiver configured as described above is as follows.

The controller 13 provides a tuner and a demodulator 10 with a tuning control signal for tuning a predetermined channel according to a key operation when a key manipulation signal for tuning a predetermined channel is applied from a user. At this time, the tuner and demodulator 10 tunes a channel corresponding to the tuning control signal provided from the control unit 13 from the satellite broadcast signal received through the antenna and the intermediate frequency IF with respect to the broadcast signal of the tuned channel. After the conversion, demodulation, and error correction process to restore to the transport stream to provide to the demultiplexer (11). The demultiplexer 11 provides program guide information to the controller 13 from the transport stream provided by the tuner and the demodulator 10 under the control of the controller 13, and the video and audio signals of the tuned channel are MPEG. It is provided to the decoder 12.

That is, the control unit 13 stores the program guide information provided by the demultiplexer 11 in the memory 15 and transmits an operation signal for tuning a specific channel by the user based on the stored program guide information. It is used to tune a specific channel selected from the stream, and program guide information corresponding to each channel required by the user is configured on a menu screen and displayed on a monitor.

At this time, the menu generating unit 14 pre-stores various types of menu screen format information for configuring the program guide information as a menu screen, and the program guide information read from the memory 15 by the control unit 13. Is configured as a menu screen corresponding to a predetermined format and provided to the image synthesizing unit 18.

Meanwhile, the MPEG decoder 12 may perform variable length decoding on the compressed coded video signal and the audio signal provided by the demultiplexer 11, for example, in consideration of the spatial and spatial correlation of the video signal. The digital audio signal is provided to the D / A converter 16 and the digital video signal is provided to the NTSC encoder 17 by reconstructing the original signal before encoding using decoding techniques such as inverse DCT, inverse quantization, and motion compensation. do. That is, the D / A converter 16 converts the digital audio signal provided from the MPEG decoder 12 into an analog audio signal and outputs the analog audio signal to the speaker, and the NTSC encoder 17 uses the digital image provided from the MPEG decoder 12. The signal is converted into an NTSC signal and provided to the image synthesizer 18.

Accordingly, the image synthesizing unit 180 mixes the image signal provided from the NTSC encoder 17, that is, the NTSC signal and the menu screen provided from the menu generator 14, to the display side under the control of the controller 13. .

The satellite broadcast signal received by the digital satellite broadcast receiver operating as described above has channels of different frequencies according to the digital satellite broadcast standard. That is, the reception channel has a different frequency according to the DSS method, which is an American-oriented digital satellite broadcasting standard, or the DVB method, which is a domestic digital satellite broadcasting standard. Accordingly, there is a problem in that a satellite broadcast receiver corresponding to the satellite broadcast signal according to the DSS method is required, and a satellite broadcast receiver corresponding to the satellite broadcast signal according to the DVB method is required.

On the other hand, PCMCIA (Personal Computer Memory Card International Association) is an interface of the Personal Computer Memory International Association, which is an optimal peripheral device that can be used in portable computers such as laptops. It is a new system. Peripherals currently allowed by the PCMCIA standard are used in most computer peripherals such as memory, hard disks, drives (HDDs), fax modems, LAN cards, music cards, data modems, emulators, controllers, and wireless modems.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to separate a channel receiving portion from a satellite broadcast receiver and to interface with a PCMCIA slot, so that a satellite broadcast signal having a different satellite broadcast signal can be connected to one satellite broadcast receiver. The present invention provides a channel receiving interface device of a satellite broadcasting receiver to have compatibility that can be received.

The present invention provides a digital satellite broadcast receiver for recovering and demultiplexing a transport stream from a tuned channel broadcast signal and performing MPEG decoding to display on a screen, comprising: a PCMCIA slot; A channel receiving module having a built-in tuner according to each digital satellite broadcasting method and interfacing the satellite broadcast signal tuned by the tuner into a signal inputtable to the PCMCIA slot; And a satellite broadcast signal processing module for processing the satellite broadcast signal provided through the PCMCIA slot into a displayable signal.

1 is a block diagram showing the configuration of a general digital satellite broadcast receiver,

2 is a block diagram illustrating a digital satellite broadcast receiver for a channel receiving interface according to the present invention.

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

100: channel receiving module 200: PCMCIA slot

300: satellite broadcast signal processing module

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the preferred embodiment according to the present invention.

FIG. 2 is a block diagram of a digital satellite broadcast receiver for interfacing a channel receiving part according to the present invention, and is comprised of a channel receiving module 100, a PCMCIA slot 200, and a satellite broadcast signal processing module 300.

At this time, the channel receiving module 100 is a transport stream interface for interfacing the transport stream data provided from the tuner and demodulator 110, the tuner and demodulator 110 for tuning and demodulating the satellite broadcast signal to restore the transport stream. 120, the microcomputer 130 controls the transport stream data provided from the transport stream interface to interface with the satellite broadcast signal processing module 300 through the PCMCIA slot 200.

In addition, the satellite broadcast signal processing module 300 may transmit / receive with the transport stream interface 310 and the channel receiving module 100 to interface with each other to demultiplex transport stream data provided through the PCMCIA slot 200. A control signal generator 320 for generating a control signal for controlling the slot 200 and a demultiplexer for providing a video signal and an audio signal of a channel tuned from transport stream data provided through the transport stream interface 310. 330, a control unit 340 for controlling display of the tuning control signal and the satellite broadcasting signal, an MPEG decoder 350 and an MPEG decoder 350 which provide MPEG decoding of the broadcast signal provided by the demultiplexer 330. The audio signal among the broadcast signals provided by the broadcast signal provided by the D / A converter 360 and the MPEG decoder 350 converted into an analog signal and provided to the speaker. An NTSC encoder 370 converts a video signal into an NTSC signal.

By the above configuration, an interface process between the channel receiving module 100, the PCMCIA slot 200, and the satellite broadcast signal processing module 300 will be described in detail.

The channel receiving module 100 is a PCMCIA card module configured separately from the satellite broadcasting signal processing module 300 so as to be interchangeable according to each digital satellite broadcasting method, and a tuner and a demodulator built in the channel receiving module 100. In 110, the tuners are tuners according to satellite broadcasting, respectively. For example, as a tuner according to each of the DSS or DVB schemes, the tuner according to the DSS scheme is configured to receive satellite broadcast signals according to the DSS scheme, and the tuner according to the DVS scheme to receive satellite broadcast signals according to the DVB scheme. It is composed. That is, the tuner and demodulator 110 tunes the satellite broadcast signal according to each satellite broadcast method, and tunes the satellite broadcast signal of the channel according to the tuning control signal of the microcomputer 130 and intermediates the broadcast signal of the tuned channel. After converting to a frequency (IF), it is restored to a transport stream by demodulation and error correction, and provided to the transport stream interface block 120.

The transport stream interface block 120 performs an interface so that the transport stream data provided from the tuner and the demodulator 110 can be input to the PCMCIA slot 200. At this time, the microcomputer 130 in the tuning and demodulation unit 110 to perform a tuning operation according to the tuning control signal of the control unit 340 of the satellite broadcasting signal processing module 300 provided through the PCMCIA slot 200. The tuning operation is controlled, and the PCMCIA slot 200 controls the transport stream data provided from the transport stream interface 120 to the satellite broadcast signal processing module 300.

As described above, when the transport stream data is provided through the PCMCIA slot 200, the satellite broadcast signal processing module 300 may interface the transport stream data to display on the screen. That is, the transport stream interface 310 interfaces to demultiplex the transport stream data input through the PCMCIA slot 200, and the demultiplexer 330 inverts the transport stream data provided from the transport stream interface 310. Multiplexing is provided to the MPEG decoder 350.

And, the control signal generator 320 generates a control signal for transmission and reception with the channel receiving module 100 through the PCMCIA slot 200, if it is detected that the PCMCIA card is mounted in the PCMCIA slot 200 The result is provided to the controller 340. When the control signal generator 320 provides the PCMCIA card detection result signal, the control unit 340 provides the tuning control signal to the channel receiving module 100 through the PCMCIA slot 200 and is provided by the transport stream interface 310. Control to demultiplex transport stream data and MPEG decoding.

At this time, the MPEG decoder 350 MPEG-decodes the broadcast signal provided from the demultiplexer 330 under the control of the controller 340, and provides an audio signal to the audio signal processor 360, and the image signal is an image. Provided to the signal processing stage 370 to display on the screen.

As described above, the present invention implements an interface for inputting a tuned satellite broadcast signal into a PCMCIA slot by embedding a tuner according to each digital satellite broadcast method and displaying a satellite broadcast signal provided through the PCMCIA slot. By performing the interface, the digital satellite broadcasting standard has an effect of being able to receive different satellite broadcasting signals with one satellite broadcasting receiver.

Claims (2)

A digital satellite broadcast receiver for recovering and demultiplexing a transport stream from a broadcast signal of a tuned channel and MPEG decoding to display on a screen. PCMCIA slot; A channel receiving module having a built-in tuner according to each digital satellite broadcasting method and interfacing the satellite broadcast signal tuned by the tuner into a signal inputtable to the PCMCIA slot; And a satellite broadcast signal processing module for processing the satellite broadcast signal provided through the PCMCIA slot into a displayable signal. The apparatus of claim 1, wherein the channel receiving module comprises: a transport stream interface configured to interface transport stream data of a broadcast signal of a channel received by the tuner to the PCMCIA slot; And a microcomputer for controlling a tuning operation according to a tuning control signal provided through the PCMCIA slot and controlling the PCMCIA slot to provide transport stream data provided from the transport stream interface to the satellite broadcasting signal processing module. A channel receiving interface device of a satellite broadcasting receiver.