KR100209625B1 - Circuit of one body type with integrated receiver & decoder and digital vcr - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcasting satellite receiver (IRD) / DVCR integrated circuit, and more particularly, to a display device for displaying analog audio and video data by decoding and descrambling a bit stream transmitted including illegal viewing and copy protection. And a broadcast receiving means for outputting the scrambled digital audio and video data to a recording medium, and recording the scrambled digital audio and video data output from the broadcast receiving means to a recording medium. Digital recording / reproducing means for reproducing and outputting scrambled digital audio and video data to the broadcast receiving means, and interface means for inputting and outputting data between the broadcast receiving means and digital recording / reproducing means are integrated into one system. By simplifying the hardware configuration and external interface, it is easy to control two systems with one controller, and when the function is expanded, it is possible to process by changing the circuit between the internals to limit the limitations due to internal characteristic interface specifications. It is possible to use the input and output related to analog signal processing in common, thereby preventing confusion during use and sharing the existing processing unit for digital functions, thereby making it the most efficient system for digital broadcasting.

Description

Digital Broadcast Receiver (IRD) / Digital VCR (DVCR) Integrated Circuit

1 is a block diagram showing an embodiment in which a conventional receiver and a DVCR are configured as separate systems.

2 is an overall block diagram of a digital broadcasting receiver / DVCR integrated circuit according to the present invention.

3 is a detailed block diagram of FIG.

Fig. 4 (a) is a head arrangement diagram showing an embodiment in which a digital head and an analog head are used in combination on a rotating drum in the DVCR portion of Fig. 3;

(b) is a dedicated digital head arrangement diagram installed on a rotating drum in the DVCR section of FIG.

* Explanation of symbols for main parts of the drawings

100 receiver 101 low noise block and tuner

102: demodulation and error correction 103: multiplexer

104: demultiplexer 105: copy protection

106: host processor 107: data decoder

108: interface 109: audio decoder

110: digital / analog converter 111: video decoder

112: encoder 200: DVCR unit

201: remote control receiver 202: sheath cone

203: head and deck 204: register

205 playback unit 300 interface unit

301: FIFO memory 302: IRD-TO-DVCR interface

303: formatter 304: deformatter

305: DVCR-TO-IRD interface 306: digital input port

308 digital output port

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated receiver decoder (hereinafter referred to as IRD) / digital video signal (DVCR) integrated circuit for digital broadcasting, and more particularly to a digital broadcast signal. The present invention relates to a digital broadcasting IRD / DVCR integrated circuit that simplifies the configuration and interface of hardware and lowers the cost by integrating IRD and DVCR for receiving and recording and reproducing the recording and reproducing to a recording medium such as a display and a tape.

Recently, as the change from the analog broadcasting system to the digital broadcasting system is further accelerated, there is an increasing demand for a peripheral device capable of processing signals transmitted to meet various purposes.

In order to meet such demands, various peripheral devices have been proposed based on a satellite receiver called a set-top-box or an IRD.

In particular, development of a device capable of a time shift function and complete intellectual property protection for broadcast programs and information data is underway.

However, there is currently no unified standard for digital broadcasting, and in order to satisfy the above basic functions and to have more expanded functions as peripheral devices, such as data service and interactive functions that can be interacted with, between IRD and peripheral devices. Since the internal hardware structure of IRD and interface for signal processing have to be modified considerably, digital VCR is proposed as a function of time shift or data storage.

FIG. 1 is a system in which conventional IRD and DVCR are separately configured, and is disclosed in 'Illegal Viewing and Copy Prevention Method and Apparatus for Digital Broadcasting System' (Applied to Korean Patent Application No. 95-30444) filed by the present applicant. A broadcast signal is transmitted and received through a satellite.

That is, the IRD 10 of FIG. 1 receives a signal transmitted through a satellite and outputs the compressed signal to the DVCR 20 as a bit stream.

The DVCR 20 has an application interface for recording and reproducing the data of the bit stream on a tape. In this case, the DVCR 20 merely plays a role as a time shift and storage of the data and at the same time the existing analog It also performs the function of VCR in signaling system.

Meanwhile, the television 30 receives the satellite broadcast transmitted through the DVCR 20 or receives and displays a signal reproduced by the DVCR 20.

At this time, since the interface between the IRD and DVCR is considerably restricted, basically only an interface for processing the bit stream exists, so that an additional interface is required when an additional interface is required to expand the function as a DVCR.

In addition, from the point of view of the consumer, it is inconvenient to control two systems for a single purpose by separate remote control or key input.

In particular, VCR cannot operate independently for copy protection of programs, which is one of the most important functions in digital broadcasting, and only conditional access by IRD is possible. It is difficult to have functions such as Pay Per Record (PPR) or Pay Per Play (PPP), and thus serves as a simple data storage.

Here, the PPR is a fee for each recording, and the PPP is a fee for each playback.

In addition, when the IRD and the DVCR are separately configured as shown in FIG. 1, too many signal lines exist between the systems when the system is operated to enable the processing of the current analog signal system and the new digital broadcasting system. It can cause confusion.

As such, when the IRD and the DVCR are separately configured, there is a problem in that the hardware increases, the cost increases due to the interface increase, and the reliability of the system is degraded.

The present invention is to solve the above problems, the object of the present invention is to upgrade the interface for transmitting the signal between the IRD and DVCR by integrating the IRD and DVCR into a single system, as well as simplify the hardware configuration and interface One controller can control two systems easily, and it is possible to change and process the circuit between internals when the function is expanded so that it is not limited by the internal characteristic interface standard, etc. IRD / DVCR integrated circuit for digital broadcasting In providing.

Another object of the present invention is to enable the common input and output related to analog signal processing to avoid confusion during use, and to share the existing processing unit for the digital function to be the most efficient system for digital broadcasting IRD / DVCR integrated type In providing a circuit.

The digital broadcasting IRD / DVCR integrated circuit according to the present invention for achieving the above object, while including illegal viewing and copy protection functions to control the illegal viewing and copy protection by decoding and descrambles the transmitted bit stream Broadcast receiving means for outputting to a display apparatus for displaying analog audio and video data, for outputting scrambled digital audio and video data to a recording medium, and for scrambled digital audio and video data output from the broadcast receiving means. Digital recording / reproducing means for reproducing scrambled digital audio and video data recorded on the recording medium and outputting the scrambled digital audio and video data to the broadcasting receiving means, and data input / output between the broadcasting receiving means and the digital recording / reproducing means. Interpe for There's configuration there is means are integrated into one system.

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

2 is an overall block diagram of a digital broadcasting IRD / DVCR integrated circuit according to the present invention, and FIG. 3 is a detailed block diagram.

2 and 3, a system in which an IRD / DVCR is integrated into one set receives and decodes and descrambles the transmitted bit stream and outputs it to display analog audio and video data, and scrambled digital audio. And an IRD unit 100 for outputting video data to a tape, scrambled digital audio and video data output from the IRD unit 100 to a tape, and scrambled digital audio and video data recorded on a tape. And a DVCR unit 200 for reproducing and outputting the IRD unit 100 to the IRD unit 100, and an interface unit 300 for inputting and outputting data between the IRD unit 100 and the DVCR unit 200.

In this case, the IRD unit 100 digitally selects a channel selected through a low noise block (LNB) and a tuner 101, an LNB, and a tuner 101 to select one channel from a signal received through an antenna. Demodulation and error correction 102 for correcting errors occurring during transmission after converting to a stream, and demodulation and error correction unit 102 selects and outputs data for demodulation and error correction, reproduction data, or external data; A multiplexer (103), a transport demultiplexer (104) for selecting only one program from among multiplexed bit streams and converting the multiple programs output through the multiplexer (103) into a decodable bit stream, and a general credit card As a size, an IC is built in, and illegal viewing is obtained by decrypting a bit stream output from the demultiplexer 104. And a smart card 105 for performing limited reception (CA) and copy protection by outputting signals for controlling copying to the demultiplexer 104, and compressed data output from the demultiplexer 104, for example, a catalog. After decompressing the data such as shopping information and outputting the compressed audio signal output from the data decoder 107 and the demultiplexer 104 through the interface 108 and outputting the digital home network, etc., the digital / analog An audio decoder 109 for converting an analog signal through an analog / digital converter (DAC) 110 and outputting the analog signal to the TV 30, and a video decoder 111 for extending the compressed video signal output from the demultiplexer 104. ), And convert the digital video data extended by the video decoder 111 into an analog NTSC format and insert an analog copy protection signal. It consists of the encoder 112 which outputs to TV30.

In this case, the smart card 105 used for protecting intellectual property, which is an important element required for digital broadcasting, employs a CA system, and the demultiplexer 104 includes a descrambler.

In addition, the DVCR unit 20 for recording and reproducing the scrambled digital signal simultaneously while operating the existing recording and reproducing system of the analog signal has a remote control receiver 201, a tuner, Record, play, rewind video, audio signal systems, servos, and mechanisms. It controls in order according to the mode, etc., and monitors the operation status of the video by various sensors and stops the tape running immediately when there is a problem to prevent damage to the tape or mechanism. The head and deck 203 disposed on the rotating drum for use as a dual use, or the analog head and the digital dedicated head is disposed on the rotating drum, the scrambled audio and video data output from the IRD unit 100, the head And a recording unit 204 for recording to tape through the deck 203, and a reproducing unit 205 for reproducing digital audio and video data from the head and the deck 203 and outputting the digital audio and video data to the IRD unit 100. It is composed.

Here, the head and the deck 203 is a wide standard mode having azimuth inversely with each other as shown in FIG. 4 (a). Extend Play; EP) A pair of dedicated heads A 'B' are arranged at right angles on a rotating drum to take charge of recording and reproduction of analog signals, and the digital head pairs A 'and B' are also used for digital use. It is responsible for recording and reproducing signals. In addition, the head and the deck 203 is a pair of narrow EP dedicated heads A 'and B' besides a pair of wide SP dedicated heads A and B having azimuths in reverse with each other as shown in FIG. 4 (b). Is arranged at right angles on the rotating drum to be responsible for recording and reproducing analog signals, and has a digital angle head DA having a phase angle of a predetermined angle (for example, 60 degrees) on the same rotational surface as the SP dedicated head pairs A and B, Place a DB to handle the recording and playback of digital signals.

In Figs. 4A and 4B, the rotating heads L and R, which are in charge of recording and reproducing the hi-fi audio signal, are disposed on the rotating drum at a constant angle with the SP dedicated heads A and B.

At this time, the analog head combined method as shown in FIG. 4 (a) and the digital dedicated head system as shown in FIG. 4 (b) may be compatible by servo control.

The interface unit 300 also includes a first input first output (FIFO) memory 301 and a FOFO memory 301 for temporarily storing scrambled audio and video data having a variable data rate output from the demultiplexer 104. IRD-TO-DVCR interface 302 for selecting data or external data stored therein) and transmitting it to the DVCR unit 200, and a fixed data transfer rate suitable for recording data output through the interface 302 on a tape. The formatter 303 converts the data and adds error correction parity, a synchronization signal, and the like to the recording unit 204 of the DVCR unit 200, and the scrambled fixed output from the reproduction unit 205 of the DVCR unit 200. The deformatter 304 and the deformatter 30 perform error correction processing and convert the audio and video data at a data rate into audio and video data at a variable data rate. DVCR-TO-IRD interface 305 for outputting the output of 4) to the multiplexer 103 of the IRD unit 100 or external data, and receives the external digital data and the multiplexer 103 of the IRD unit 100. And a digital input port 306 output to the interface 302 of the interface unit 300, and an input signal processor 307 for processing when the external digital data input to the digital input port 306 has a very large data rate. A digital output port 308 for outputting the signal output from the interface 305 to the outside, an output signal processing unit 309 for processing when the data output from the interface 305 has a very high burn rate; The formatter 303, the deformatter 304, the host processor 106 of the IRD unit 100, and the functional microcomputer 310 for controlling additional functions of the ciscone of the DVCR unit 200.

In this case, the input and output signal processing units 307 and 309 include an ECL-TO-TTL gate and an external interface (EXT IF).

In addition, the IRD unit 100 includes a remote controller receiver 201, a sheath 202, and a function micom 310 of the interface unit 300 in order to unify the control of the IRD and the DVCR. A host processor 106 having a communication of is included.

In the present invention configured as described above, when receiving a bit stream, that is, a program through a satellite broadcasting antenna, the received audio and video data are scrambled digital audio and video data.

That is, the LNB and the tuner 101 select one channel from the signals received through the antenna, and the demodulation and error correction unit 102 converts the selected channel into a digital bit stream to correct an error occurring during transmission. Output to the transport demultiplexer 104 through the multiplexer 103.

At this time, a great advantage of digital transmission is that it is possible to transmit several programs in the same bandwidth as the existing analog transmission channel, and at present, four or more programs are allocated to one transmission channel (for example, a transponder) and transmitted. have.

Thus, the data rate for this is several tens of Mbps, currently 40-50 Mbps. In addition, the program sends compressed signals divided into high and low rates according to the program for efficient transmission. The data stream standard currently used for transmission is MPEG2 (Moving Picture Experts Group 2). ), Movies and general information related programs are generally transmitted at 5 Mbps or less, and sports and events are generally transmitted at 9 Mbps or less.

Even in a system separate from these standards, the transmission speed is not exceeded.

Accordingly, the signal transmitted in this form is input to the demultiplexer 104, and the demultiplexer 104 selects only one program among the multiplexed multiplexed bit streams and decodes the bit stream of the selected program to decode the smart card 105. Will output The smart card 105 decrypts the decoded bit stream and outputs a signal for controlling illegal viewing and copy protection to the demultiplexer 104.

Accordingly, the demultiplexer 104 descrambles the decoded bit stream using signals for controlling illegal viewing and copy protection output from the smart card 105 to decode the data decoder 107, the audio decoder 109, and Output to the video decoder 111.

In this case, since digital broadcasting generally transmits data such as catalog or shopping information in addition to audio and video data, such data is extended by the data decoder 107 and then, through a separate interface 108, such as a digital home network. Output to external device.

At the same time, the compressed audio signal output from the demultiplexer 104 is extended by the audio decoder 109 and then converted into an analog signal by the DAC 110 and output to the TV 30, which is output from the demultiplexer 104. The compressed video signal is extended by the video decoder 111 and then converted into an analog NTSC format by the encoder 112, and an analog copy protection signal of a macro vision method is inserted and output to the TV 30 as an analog composite video signal for display. .

On the other hand, the DVCR unit 200 is configured to operate the existing analog signal recording and reproducing system in the same manner, and should be configured to record and reproduce digital signals. At this time, the DVCR unit 200 records and reproduces one channel of the broadcasted digital signal for recording and reproducing the digital signal, and protects intellectual property rights and additional functions such as index search and skip play. It is possible by control.

In addition, the demultiplexer 104 includes a channel selector to record while watching a program or record a second tone, that is, view one channel and record another channel, for signal processing and control with an actual DVCR.

In addition, the host processor 106 may control the IRD unit 100 and the DVCR unit 200 to unify the control unit 302, the remote control receiver 201, and the formatter 303 of the DVCR unit 200. It has communication with the deformatter 304 and the function micom 310 that controls the additional functions. Accordingly, the demultiplexer 104 outputs scrambled audio and video data to the DVCR unit 200 through the interface unit 300 for recording on a tape.

That is, since the scrambled audio and video data are variable data rates, the scrambled audio and video data are stored in the FIFO memory 301 of the interface unit 300 to be converted to a fixed data rate, and the previously stored data is output to the interface 302.

The interface 302 selects data output from the FIFO memory 301 or external digital data and outputs the data to the formatter 303. The formatter 303 writes data output through the interface 302 to a tape. The data can be arranged in accordance with the four modes described below on the tape while performing error correction coding so as to process the data by converting the data into an appropriate fixed data rate and correcting an error occurring during reproduction of the DVCR unit 200. The data synchronization, identifier (ID), subcode, etc. are divided by a predetermined size so as to be output to the recording unit 204 of the DVCR unit 200.

At this time, the recording unit 204 is used in the existing tape materials as it is, while operating the existing mechanism as it is specified in Table 1 to enable the one-channel recording and playback of the digital signal, intellectual property protection, additional functions It handles four modes.

In particular, the drum speed must be capable of operating at 3600 rpm in order to record data input at 10 Mbps on a VHS tape as shown in mode 2, in order to do so in the head and deck 203 as shown in FIG. The EP dedicated head for recording and reproducing analog signals can be used in combination with the digital head for recording and reproducing digital signals or for recording and reproducing digital signals in addition to the SP and EP dedicated heads for recording and reproducing analog signals as shown in FIG. Digital head is used on the rotating drum. In this case, the analog head combined method and the digital dedicated head method may be compatible by the servo control.

On the other hand, the sheath 202 controls the operation of the tuner, the video, the audio signal system and the servo and the mechanism system in order according to the modes such as recording, playback, rewinding, etc., and monitors the operation state of the video by various sensors. If a problem arises, stop the tape running immediately to prevent damage to the tape or mechanism.

At this time, the external digital input data is output to the multiplexer 103 of the IRD unit 100 through the digital input port 306 and to the interface 302 of the interface unit 300, if the digital input port ( When the external digital input data input to the 306 is high speed, the signal is processed by the input signal processing unit 307 and then output to the multiplexer 103 of the IRD unit 100 and the interface 302 of the interface unit 300. .

Accordingly, the external digital data input to the multiplexer 103 undergoes the same process as the broadcast signal processing. The demultiplexer 104 decodes the external input data bit stream input through the multiplexer 103 to decode the smart card 105. The decoded bit stream is decoded by the smart card 105 to output a signal for controlling illegal viewing and copy protection to the demultiplexer 104, and the demultiplexer 104 outputs a signal from the smart card 105. The decoded bit stream is descrambled using signals for controlling viewing and copy protection and output to the data decoder 107, the audio decoder 109, and the video decoder 111 to display analog audio and video data. .

On the other hand, the scrambled audio and video data recorded on the tape is reproduced through the head as shown in FIGS. 4A and 4B and input to the deformatter 304, and the deformatter 304 is the formatter 303. On the contrary, the data of fixed data rate is converted into data of variable data rate and output to the multiplexer 103 of the IRD unit 100 through the interface 305 or selectively through the digital input port 308. Output to the outside. In this case, when the output data is high speed, the output signal is processed by the output signal processor 309 and then output to the outside through the digital output port 308.

The signal output to the outside exchanges a digital signal with the same external VCR. In addition, the scrambled audio and video data reproduced by the DVCR unit 200 and input to the multiplexer 103 also undergo the same process as the broadcast signal processing. In the demultiplexer 104, the scrambling input through the multiplexer 103 is performed. Decoded audio and video data bit streams and output them to the smart card 105, and the smart card 105 decodes the decoded bit streams and outputs signals to the demultiplexer 104 to control illegal viewing and copy protection. The demultiplexer 104 descrambles the decoded bit stream using signals for controlling illegal viewing and copy protection output from the smart card 105 to display analog audio and video data on the TV 30. Output to the decoder 107, the audio decoder 109, and the video decoder 111. Or outputted to the DVCR unit 200 through the interface unit 300 and re-copyed.

On the other hand, the present invention corresponds to a device for recording and reproducing digital signals as well as DVCR, and also corresponds to an IRD broadcast signal receiver.

As described above, according to the IRD / DVCR integrated circuit according to the present invention, by integrating the IRD and DVCR into one system in response to digital broadcasting, the hardware configuration and the external interface can be simplified, and the two systems can be controlled by one controller. It can be easily controlled, and when the function is extended, it is possible to change and process the circuit between the internal parts so that it is not restricted by the internal characteristic interface standard.

In addition, the input and output associated with analog signal processing can also be used in common, thereby preventing confusion during use, and sharing the existing processing unit for digital functions, thereby making it the most efficient system for digital broadcasting.

In addition, since the hardware can be efficiently operated in order to perform various functions of the tape device, the cost is reduced.

Claims (5)

Bit stream transmitted with illegal viewing and copy protection function is descrambled according to signals for controlling illegal viewing and copy protection and output to the display device for displaying analog audio and video data, and scrambled digital audio and video data Broadcast receiving means for outputting the data to a recording medium, scrambled digital audio and video data output from the broadcast receiving means on a recording medium, and reproducing scrambled digital audio and video data recorded on the recording medium. Digital recording / reproducing means for outputting to a broadcast receiving means, and converting data of scrambled variable data rate or external data output from the broadcast receiving means into data having a fixed data rate suitable for recording on a recording medium, A digital means for converting the data of the scrambled fixed data rate output from the digital recording / reproducing means into data having a variable data rate and outputting the broadcast receiving means or an external means integrated into one system. Broadcast receiver / digital VR integrated circuit. The method of claim 1, wherein the broadcast receiving means comprises a low noise block and a tuner for selecting one channel among signals received through an antenna, and a channel generated through the low noise block and tuner after converting the selected channel into a digital bit stream. A demodulation and error correction unit for correcting an error, data for which demodulation and error correction has been performed in the demodulation and error correction unit, reproduction data reproduced in the digital recording / reproducing means, and external digital data as input signals. A bit stream of a program selected using an input selector for selecting and outputting a signal and a signal for controlling illegal viewing and copy protection by selecting only one program from among a bit stream of one channel multiplexed by multiple programs output through the input selector A demultiplexer for descrambling Smart card which decodes the output bit stream and outputs signals for controlling illegal viewing and copying back to the demultiplexer to perform limited reception and copy protection, and descrambled audio and video data output from the demultiplexer Digital broadcasting receiver / digital broadcasting unit comprising an audio and video decoding unit for converting the analog audio and video data into an output unit and outputting the same to the display device, and a host processor for unifying control of the broadcast receiving unit and the digital recording / reproducing unit. VRC integrated circuit. 3. The demultiplexer of claim 2, wherein the demultiplexer includes a channel selector to record while watching a program or to record another channel while viewing one channel for signal processing and control with a digital recording / reproducing means. Digital broadcast receiver / digital V-al integrated circuit. The digital broadcasting receiver / digital broadcasting receiver as claimed in claim 1 or 2, wherein the broadcast receiving means comprises a data decoder for expanding information data output from the demultiplexer and outputting the information data to an external device through an interface. VRC integrated circuit. The FIFO memory of claim 1, wherein the interface means temporarily stores scrambled audio and video data output from the demultiplexer at variable data rates, and selects data or external data stored in the FIFO memory to record / reproduce the digital data. An input interface for transmitting to the apparatus, a formatter for converting the data output through the input interface into data having a fixed data rate suitable for recording on a recording medium and outputting the data to the digital recording / reproducing means, and the digital recording / reproducing means. A deformatter for converting the scrambled fixed data rate audio and video data output from to a variable data rate audio and video data, and outputting the output of the deformatter to an input selector of the broadcast receiving means or other digital recording / play An output interface for outputting to a digital signal, an input selector for receiving the external digital data and outputting the signal to the input interface, and a digital signal output for externally outputting a signal output from the output interface. Digital broadcast receiver / digital V-al integrated circuit composed of negative parts.