KR100577369B1 - Card for high definition television broadcasting signal receiving in personal computer - Google Patents

Abstract

According to the present invention, a digital broadcasting receiver capable of receiving digital broadcasting for high definition television (HDTV) can be carded to be coupled to a slot in a computer, and the communication method with the computer is a PCI (Peripheral Component Interconnection) method. The present invention relates to a digital broadcast receiving card for a computer which enables to receive digital broadcast at low cost.

The present invention provides a digital broadcasting reception card mounted on a computer to receive a digital broadcasting signal from a computer, comprising: a tuner for tuning an arbitrary channel selected by a user among digital broadcasting signals for each channel; An intermediate frequency amplifying unit for filtering only an intermediate frequency band of the digital broadcast signals of the analog type tuned by the tuner and then amplifying the intermediate frequency band to a size suitable for signal processing; A first analog / digital converter for digitizing the analog broadcast signal amplified by the intermediate frequency amplifier; A signal restoring unit for restoring an error of the digital broadcasting signal converted by the first analog / digital converter; A demultiplexer for separating the digital broadcast signal recovered by the signal restorer into a video signal, an audio signal, a text signal, and other information; A video signal processor for signal processing the video signal separated by the demultiplexer; An audio signal processor which processes the audio signal separated by the demultiplexer; Supplying a data bus for communicating the video signal processed by the video signal processor, the audio signal processed by the audio signal processor, the text signal, and other information with a computer, and the driving power supplied from the computer to the digital broadcasting receiving card. A bus interface configured between the power bus for interfacing the power bus and the data bus with a computer; The bus interface unit generally controls various functions of the digital broadcast receiving card under control from a computer.

According to the present invention, there is an advantage in that the receiver capable of receiving digital broadcasting is configured in the form of a card that can be mounted on a computer, so that the digital broadcasting can be received at a low price.

Digital broadcasting, HDTV, receiving card, computer, PCI interface

Description

Digital broadcasting reception card for computer {CARD FOR HIGH DEFINITION TELEVISION BROADCASTING SIGNAL RECEIVING IN PERSONAL COMPUTER}             

1 is a schematic block diagram of a digital broadcast receiving card for a computer according to the present invention;

FIG. 2 is a state diagram in which the digital broadcasting reception card shown in FIG. 1 is used in a computer.

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

100: digital broadcast receiving card 101: antenna line

102: connection terminal 103: card pin unit

104: tuner 105: intermediate frequency amplifier

106, 113: analog-to-digital converter 107: channel 1 decoder

108: channel 2 decoder 109: TS-demultiplexer

110: audio decoder 111: amplifier

112: video decoder 114: format converter

115: graphics processor 116: PCI interface unit

200: Computer 201: Slot

The present invention relates to a digital broadcast receiving card for a computer, and more particularly, to digitalize a digital broadcast receiver capable of receiving a digital broadcast for high definition television (HDTV: High Definition Television) to be coupled to a slot in a computer, The present invention relates to a digital broadcasting reception card for a computer that can receive digital broadcasting at low cost by using a Peripheral Component Interconnection (PCI) communication method with a computer.

The present invention also relates to a digital broadcast receiving card for a computer having a data storage and management capability by mounting a digital broadcast receiving card in a computer and storing the received digital broadcast signal in a storage medium such as a hard disk.

Recently, with the advent of the digital age, various digital technologies have been actively introduced into the broadcasting field. In particular, the development of audio / video compression technology that processes data in a digital format has become a direct background to realize digital satellite broadcasting.

In addition, digital satellite broadcasting is greatly helped by the development of communication satellites and broadcasting technologies, and the boundaries between the existing telecommunications industry, the computer industry, and the broadcasting and film industries have been broken down. This is the result of the phenomenon expanding into the field.

Digital Direct Broadcasting Satellite (DBS) broadcasting system technology, the basis of the digital satellite broadcasting system, is based on the MPEG-2 (Moving Picture Experts Group-2) by the MPEG Committee (ISO / IEC JTC / SC2 / WG11) of the International Standard Organization (ISO). Standardization of the system (ISO / IEC 13818-1) and video (ISO / IEC 13818-2) and audio (ISO / IEC 13818-3) is completed, the European Digital Video Broadcasting (DVB) challenge and European Telecommunications (ETSI) Standardization of digital television systems (satellite, terrestrial, cable), including service information, scrambling, channel coding, and modulation by the Standards Institute, has been successfully completed. The realization and sharing of technology is spreading internationally.

In the history of major digital satellite broadcasting services currently being serviced, in the mid-1994s, PrimeStar Partners of the United States applied Digichipher technology, similar to MPEG, to the conventional DBS. With the launch of PrimeStar DBS), DigitalTV / USSB (DirecTV / United States Satellite Broadcasting Company) also launched digital DBS service using MPEG-1 video technology, and digital satellite broadcasting service has been in full swing.

Since the beginning of 1996, T-Comm's Alphastar and Echostar Comm's DISH Network, which has applied MPEG-2 technology and DVB standards, have been in service. Japan and Europe are actively participating in digital satellite broadcasting services using their respective communication satellites and unique digital satellite broadcasting methods. In addition, Korea Telecommunication (KT) of Korea has begun digital satellite broadcasting service applying MPEG-2 technology and DVB standard through Koreasat in July 1996.

Advances in digital satellite broadcasting technology not only provide advantages in terms of television broadcasting, such as efficient use of repeater bandwidth, improved video and audio quality, and miniaturization of receive antennas, but also enable data services. As a result, it can be easily connected and converged with other communication systems, computer systems, and different digital broadcasting systems, thereby creating a wide range of technological ripple effects.

In other words, because digital satellite broadcasting uses compressed digital video and audio, analog satellite broadcasting can be assigned to a single repeater, unlike existing analog satellite broadcasting, which only allocates one channel per satellite broadcasting repeater. Compared to this, it is possible to use a given bandwidth more efficiently, and also to share information with communication systems and large computer systems, which is prompting the emergence of various new information services.

As described above, digital satellite broadcasting has an environment that can provide additional digital services in addition to providing digital compressed video and audio, and due to the digital signal processing, service flexibility, As it has advantages such as channel scalability, it is selecting potential to create new added value.

In order to receive digital broadcasting (satellite, terrestrial, cable), users can purchase digital broadcasting capable television (HDTV) or use satellite broadcasting receiver terminals (SBR (Satellite Broadcast Receiver), STB (Set Top Box), etc.). It must be purchased separately and connected to an analog broadcasting television.

However, according to such a conventional digital television system, the following problem (s) occur.

That is, since the price of the high-definition television (HDTV) and satellite broadcasting terminal currently being developed and marketed is expensive, the general user feels economical burden to purchase.

In addition, since there is no function for managing various types of information of the received digital broadcast, the function remains simply to watch the broadcast.

Accordingly, the present invention is to solve such a problem (s), the object of the present invention is to configure a receiver capable of receiving digital broadcasting in the form of a card that can be mounted on a computer, it is possible to receive digital broadcasting at a low price In addition, the present invention provides a computer digital broadcasting reception card for storing and managing various types of received digital broadcasting information in a storage medium such as a hard disk.

A feature of the present invention for achieving such an object (s) is a digital broadcast receiving card mounted on a computer to receive a digital broadcast signal from a computer: the digital broadcast receiving card is coupled to a slot of the computer and the computer. A card pin unit connected to the main processor to be in electrical communication; An antenna line for receiving a digital broadcast signal; A tuner for tuning an arbitrary channel selected by a user among digital broadcasting signals for each channel received through an antenna line; An intermediate frequency amplifying unit for filtering only an intermediate frequency band of the digital broadcast signals of the analog type tuned by the tuner and then amplifying the intermediate frequency band to a size suitable for signal processing; A first analog / digital converter for digitizing the analog broadcast signal amplified by the intermediate frequency amplifier; A signal restoring unit for restoring an error of the digital broadcasting signal converted by the first analog / digital converter; A demultiplexer for separating the digital broadcast signal recovered by the signal restorer into a video signal, an audio signal, a text signal, and other information; A video signal processor for signal processing the video signal separated by the demultiplexer; An audio signal processor which processes the audio signal separated by the demultiplexer; Supplying a data bus for communicating the video signal processed by the video signal processing unit, the audio signal processed by the audio signal processing unit, the text signal and other information with a computer, and the driving power supplied from the computer to the digital broadcasting receiving card. A bus interface configured between the power bus for interfacing the power bus and the data bus with a computer; The bus interface unit generally controls various functions of the digital broadcast receiving card under control from a computer.

Here, the digital broadcast receiving card further includes an antenna line connecting portion for coupling the antenna line and the tuner.

The signal restoration unit may further include: a channel 1 decoder configured to correct an error of a digital broadcast signal converted by the first analog / digital converter; And a channel 2 decoder for removing interference between data of the digital broadcast signal converted by the first analog / digital converter.

In addition, the audio signal processing unit processes the audio signal separated from the demultiplexer in a Dolby manner so that the stereo (L-CH, R-CH), surround (RL-CH, RR-CH), center (C), woofer, etc. An audio decoder for separating audio signals into 5.1 channel audio signals; It includes an amplifier for amplifying the audio signal for each channel separated by the audio decoder to a predetermined size so that the user can identify.

The video signal processor may further include a video decoder configured to release a compressed state of the video signal separated from the demultiplexer; And a format converter configured to set a display form including at least a broadcast method set by a user and a resolution and color.

The bus interface unit is a PCI bus interface unit.

The apparatus may further include a second analog / digital converter for converting an analog broadcast signal input from an external device into a digital form and outputting the digital broadcast signal to the video signal processor.

The apparatus may further include a graphic processor configured to process the video signal processed by the video signal processor into a color signal and a luminance signal that can be displayed on a monitor.

Hereinafter, exemplary embodiment (s) of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description there are shown a number of specific details, such as components of the specific circuit, which are provided only to help a more general understanding of the present invention that the present invention may be practiced without these specific details. It is self-evident to those of ordinary knowledge in Esau. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

FIG. 1 is a schematic block diagram of a digital broadcasting reception card for a computer according to the present invention, and FIG. 2 is a state diagram of using the digital broadcasting reception card shown in FIG.

1 and 2, the digital broadcasting reception card 100 is provided with a connection terminal 102 for connecting the antenna line 101, and can be electrically coupled to the slot 201 in the computer 200. The card pin portion 103 is formed to be.

In addition, referring to the configuration block inside the digital broadcast receiving card 100, the tuner 104 tunes the analog broadcast signal of a specific channel desired by the user among the analog broadcast signals for each channel received through the antenna line 101. Then, it outputs to the intermediate frequency amplifier 105.

The intermediate frequency amplifier 105 amplifies the intermediate frequency band of the analog broadcast signal tuned by the tuner 104 to a size suitable for signal processing, and then outputs it to the first analog / digital converter 106.

The first analog-to-digital converter 106 converts the analog broadcast signal amplified by the intermediate frequency amplifier 105 into a digital form and then outputs the digital broadcast signal to the channel 1 decoder 107.

The channel 1 decoder 107 processes various signal restoration operations on the digital broadcast signal converted by the first analog / digital converter 106. That is, the channel 1 decoder 107 is responsible for restoring the original signal by performing error correction and restoration of a digital broadcast signal damaged by transmission error and interference.

The channel 2 decoder 108 works with the channel 1 decoder 107 to restore the damaged digital broadcast signal to the original signal. In this case, the channel 2 decoder 108 performs an interference (ISI) between each symbol of the data packet. It consists of an equalizer that eliminates Inter Symbol Interference.

The TS-demultiplexer 109 separates a video signal, an audio signal, and a text signal among the digital broadcast signals reconstructed by the channel 1 decoder 107 and the channel 2 decoder 108, respectively, and configures the respective component blocks. Optionally output to

The audio decoder 110 processes an audio signal by using an AC-3 method (Doolby method) to generate stereo (L-CH, R-CH), surround (RL-CH, RR-CH), center (C), and the like. Outputs 5.1-channel audio signals, such as woofers.

The amplifier 111 amplifies the 5.1-channel audio signal output from the audio decoder 110 to a predetermined size that can be identified by the user, and then plays the final output through the speaker so as to be recognized by the user. .

The video decoder 112 releases the compressed state of the video data separated by the TS-demultiplexer 109.

The second analog-to-digital converter 113 converts an analog broadcast signal input from an external television or a video camera into a digital form and then outputs it to the format converter 114.

The format converter 114 converts the video data decompressed by the video decoder 112 or the digital broadcast signal converted by the second analog / digital converter 113 into a predetermined specific format. That is, the format converter 114 converts the video data into a broadcast format that can be displayed on the monitor in the NTSC or PAL method, and also converts various states that can be expressed on the monitor such as resolution and color according to preset values.

The graphic processor (0SGM: On Screen Graphic Module) 115 converts the video data processed by the format converter 114 or the text information separated by the TS-demultiplexer 109 into R, G, and B that can be displayed on the monitor. To the final output.

The PCI (Peripheral Component Interconnection Interface Device) 116 transmits the date information separated by the TS-demultiplexer 109 to the computer 200 when the computer 200 desires data information among the received broadcast signals. Interfacing to the main processor and the PCI method, where the PCI method is briefly described, the PCI method is a specification of an I / O bus for a personal computer, and the protocol is simple. Designed by Intel, the next-generation local bus with greater data latency and scalability that VESA local buses had, the current VESA local bus supports up to three peripherals, up to 10 PCIs simultaneously. The concept of "Plug-in Display" to connect peripherals allows the connected peripherals to be arranged automatically. With mastering, even if the speed of the peripheral device does not keep up with the speed of the central processing unit, you can continue to work independently of the operation of the peripheral device. Therefore, the PCI interface unit 116 interfaces with the provision of the driving power provided from the computer 200 to the digital broadcasting reception card 100.

In particular, the digital broadcast receiving card 100 is generally controlled by a main processor (CPU) in the computer.

When the digital broadcasting reception card 100 having such a configuration is mounted in the slot 201 of the computer 200 as shown in FIG. 2, the main processor of the computer 200 is the PCI in the digital broadcasting reception card 100. While communicating with the interface unit 116, various functions for receiving digital broadcasting or storing received information are performed.

Referring to the operation of the present invention having such a configuration as follows.

As shown in FIG. 2, when the user mounts the digital broadcasting reception card 100 in the slot 201 of the computer 200, the slot 201 and the card pin 103 of the digital broadcasting reception card 100 are electrically connected. Is connected to the main processor of the computer 200 and the central processing unit 117 of the digital broadcast receiving card 100 is in a state capable of communication.

Then, when the user enters a mode for receiving a digital broadcast signal by driving a predetermined application program, the computer 200 displays a digital broadcast reception state control window on the monitor so that the user can select an arbitrary channel. .

Accordingly, when a user selects a broadcast signal of a specific channel, the broadcast signal of a specific channel among the broadcast signals of various channels received through the antenna line 101 is tuned by impedance matching of the tuner 104. The received analog broadcast signal is converted into a digital broadcast signal by the first analog / digital converter 106 and then provided to the channel 1 decoder 107.

The channel 1 decoder 107 processes various signal restoration operations on the digital broadcast signal converted by the first analog / digital converter 106. That is, the channel 1 decoder 107 performs an error correction and restoration operation of the digital broadcast signal damaged by transmission error and interference, and restores the original signal to the channel 2 decoder 108. In this case, the channel 2 decoder 108 is configured with an equalizer to perform restoration of the damaged digital broadcast signal to the original signal together with the channel 1 decoder 107. In this case, the channel 2 decoder 108 performs an operation of each data packet. Eliminate interference between symbols.

Subsequently, when the TS-demultiplexer 109 separates and demultiplexes the video signal, the audio signal, and the text signal from the digital broadcast signal with reference to the head of the digital broadcast signal on which error correction is performed, the separated video signal is decoded by the video decoder 112. Compressed state is released by the user, and is converted into the broadcasting method, resolution and various forms set by the user through the format converter 114, and converted into R, G, and B forms by the graphic processor 115 and then displayed on the monitor. The final output.

In addition, the audio signal separated by the TS-demultiplexer 109 is separated into respective channels such as stereo, surround, center and woofer by the audio decoder 110, and has a predetermined size that can be recognized by the user by the amplifier 111. After amplified, it is finally output to the speaker.

The text signal separated by the TS-demultiplexer 109 is converted into an on-screen display character form by the graphic processing unit 115 and overlaid on the monitor.

At this time, the digital broadcast receiving card 100 interfaces with the PCI method through the PCI interface unit 116 when communicating with the main processor in the computer 200. That is, since there is no data initially or because it is not initialized to perform a function, no operation is performed, but initialization is started by the main processor of the computer 200. When the main processor of the computer 200 causes the PCI interface unit 116 to perform the necessary control through the PCI bus, the PCI interface unit 116 switches each component in the digital broadcasting reception card 100 to a ready state. Let's do it. Subsequently, when a signal is input, the digital broadcast screen is displayed on the screen by processing the video signal, the audio signal, and the text signal according to the aforementioned procedure.

Here, the change of the input signal, the change of the format of the broadcast signal to be output, the selection of information to be output, and the like are achieved by the main processor of the computer 200 controlled by the PCI interface unit 116. At this time, the important point is that the process of processing the digital broadcast signal is processed mostly through the hardware, it is almost independent of the performance of the main processor of the computer 200. That is, the part related to the information processing such as video and audio is operated irrespective of the main processor, but the general data related part (program information, various control information, etc.) must be processed in association with the main processor.

In addition, since such information is stored in a hard disk or other storage medium under the control of the main processor of the computer 200, and is read and provided to the user as needed, data management capability related to digital broadcasting is added to the computer 200. It becomes the form that becomes. Therefore, the digital broadcasting reception function can be improved.

As described above, although the specific embodiment (s) have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiment (s) but should be defined by the claims below and equivalents thereof.

As a result, according to the digital broadcast receiving card for a computer according to the present invention, the following advantages occur.

That is, by configuring a receiver capable of receiving digital broadcasting in the form of a card that can be mounted on a computer, it is possible to receive digital broadcasting at a low price.

In addition, various types of received digital broadcasting information may be stored in a storage medium such as a hard disk and then managed.

Claims (7)

In a digital broadcast receiving card mounted on the computer to receive a digital broadcast signal from a computer: A tuner for tuning an arbitrary channel selected by a user among the digital broadcast signals for each received channel; An intermediate frequency amplifying unit which filters only an intermediate frequency band of the digital broadcasting signals of the analog type tuned by the tuner and then amplifies the signal to a size suitable for signal processing; A first analog / digital converter for digitizing the digital broadcast signal in analog form amplified by the intermediate frequency amplifier; A signal restoring unit for restoring an error of the digital broadcasting signal converted by the first analog / digital converter; A demultiplexer for separating the digital broadcast signal recovered by the signal restorer into a video signal, an audio signal, a text signal, and other information; A video signal processor which processes the video signal separated by the demultiplexer; An audio signal processor which processes the audio signal separated by the demultiplexer; And A data bus for communicating the video signal processed by the video signal processing unit, the audio signal processed by the audio signal processing unit, the text signal, and the other information with the computer, and a driving power supply supplied from the computer; A bus interface configured between a power bus for supplying the digital broadcast reception card to the power bus and the data bus and the computer; And the bus interface unit controls the various functions of the digital broadcasting reception card as a whole according to the control from the computer. The method of claim 1, wherein the signal recovery unit, A channel 1 decoder configured to correct an error of the digital broadcast signal converted by the first analog / digital converter; And And a channel 2 decoder for removing interference between data of the digital broadcast signal converted by the first analog / digital converter. The method of claim 1, wherein the audio signal processor, The audio signal separated from the demultiplexer is processed in a Dolby manner to provide 5.1 channels such as stereo (L-CH, R-CH), surround (RL-CH, RR-CH), center (C), and woofer. An audio decoder separating the audio signal; And And an amplifier for amplifying the audio signal for each channel separated by the audio decoder to a predetermined size so that a user can identify the same. The method of claim 1, wherein the video signal processing unit, A video decoder which decompresses the compressed state of the video signal separated by the demultiplexer; And A digital broadcast receiving card for a computer, comprising a format converter for setting a display format including at least a broadcast method set by a user and a resolution and color. The method of claim 1, wherein the bus interface unit, Digital broadcast receiving card for a computer, characterized in that the PCI bus interface. According to claim 1, wherein the digital broadcast receiving card, And a second analog / digital converter for converting an analog broadcast signal input from an external device into a digital form and outputting the digital broadcast signal to the video signal processor. According to claim 1, wherein the digital broadcast receiving card, And a graphic processing unit which processes the video signal processed by the video signal processing unit into a color signal and a luminance signal that can be displayed on a monitor.

Images