JP2000101975A - Video reproducing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video reproducing system capable of reproducing video by selectively using a digital satellite broadcasting receiving system, a DVD video reproduction system and a VOD video reproduction system. SOLUTION: A digital satellite broadcasting receiving system, a DVD video reproduction system and a VOD video reproduction system share an MPEG2 decoder 4, which is connected to the signal control part 3 of the digital satellite broadcasting receiving system, a video display device showing video data from the decoder 4 and a sound output device outputting sound based on sound data from the decoder 4. A CPU 16 controls the part 3, the DVD video reproduction system and the VOD video reproduction system. With the above configuration, it is possible to reproduce video by selectively using the digital satellite broadcasting receiving system, the DVD video reproduction system and the VOD video reproduction system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reproducing system for reproducing an image.

[0002]

2. Description of the Related Art At present, digital broadcasting has a service called digital satellite broadcasting, and a technology of compressing audio and video called MPEG2 is used. In the digital satellite broadcasting service, transmission is performed by a packet method called a transport stream (Transport Stream [TS]) using an MPEG2 compression technique. On the other hand, there is a DVD video reproduction system as a digital storage medium, and the DVD video reproduction system also uses an MPEG2 compression technique. In the DVD video reproduction system, the data is stored in a system called PS (Program Stream), and the PS is read and reproduced. Also, in video reproduction in multimedia communication such as a video-on-demand (Video On Demand [VOD]) video reproduction system, an MPEG2 compression technique is used.

The above-mentioned digital satellite broadcast receiving system and D
Although both the VD video reproduction system and the VOD video reproduction system use the same compression technology called MPEG2, a dedicated receiver called IRD is required for digital satellite broadcasting.
A VD player is required, and a dedicated playback device is required for video playback even in VOD video playback.

[0004] As a conventional digital satellite broadcast receiver, for example, a receiver disclosed in Japanese Patent Application Laid-Open No. 8-265746 is known. As shown in FIG. 15, in this digital satellite broadcast receiver, the TS packet transmitted from the tuner passes through the decryption unit 101 and is input to the PID filter 102. In the PID filter 102,
The video and audio packets selected and received are transmitted to the decoder interface unit 103. The decoder interface unit 103 outputs video and audio data in response to a request from the MPEG2 decoder 104.

[0005] The PID filter 102 transfers program information and the like to the system memory 105 via the bus memory control unit 106. The bus memory control unit 106
Only transfer to the system memory 105 can be performed from the D filter 102. The CPU 107 includes a system memory 105
Analyze the information stored in the
It controls the D filter 102, the MPEG2 decoder 104, and the entire system.

[0006]

However, since the conventional digital satellite broadcast receiver as a video reproduction system is closed as a system for receiving digital satellite broadcasts, it is difficult to use DVD video or D-VHS (Digital Video Broadcasting).
tal VHS) and the like, and cannot reproduce video content sent from a network.

An object of the present invention is to provide a video reproducing system capable of reproducing a video by selectively using a digital satellite broadcast receiving system, a DVD video reproducing system, and a VOD video reproducing system.

[0008]

According to one aspect of the present invention, there is provided an image reproducing system comprising a digital satellite broadcast receiving system, a DVD image reproducing system, and a VOD image reproducing system. The broadcast receiving system, the DVD video reproducing system, and the VOD video reproducing system include an MPEG2 decoder connected to a signal control unit of the digital satellite broadcast receiving system, and an MPE.
A video display device that displays video data from the G2 decoder and an audio output device that outputs audio based on audio data from the MPEG2 decoder are shared, and the signal control unit and the D
It is characterized by having a signal control unit connected to the VD playback system and the VOD video playback system, and control means for controlling the DVD playback system and the VOD video playback system.

According to a second aspect of the present invention, in the first aspect, the signal control unit has a PID filter, and the control unit transmits the transport stream from the digital satellite broadcast receiving system via the PID filter. MPEG
2 decoder, and a stream from the DVD playback system to the MPE directly without passing through a PID filter.
The present invention is characterized in that it has means for giving to a G2 decoder and means for giving a stream from a VOD video reproduction system directly to an MPEG2 decoder without passing through a PID filter.

According to a third aspect of the present invention, in the first aspect of the present invention, there is further provided a means for recording a transport stream from a digital satellite broadcast receiving system in a DVD video reproducing system.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the signal control section has a PID filter, and the control means transmits the transport stream from the digital satellite broadcast receiving system via the PID filter. MPEG
2 decoder, and the stream from the DVD video reproduction system is directly transmitted to the M
Means for giving to the PEG2 decoder, and when the stream from the VOD video playback system is a transport stream, the stream from the VOD video playback system
Means for providing to the MPEG2 decoder via the D filter, and means for directly supplying the stream from the VOD video playback system to the MPEG2 decoder without passing through the PID filter when the stream from the VOD video playback system is not a transport stream It is characterized by the following.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, when the transport stream from the digital satellite broadcast receiving system is encrypted, the transport stream is decrypted and transmitted to the signal control unit. It is characterized by having a decryption means for giving.

According to a sixth aspect of the present invention, in the fourth aspect, when the transport stream from the digital satellite broadcast receiving system is encrypted and the transport stream is recorded in the DVD video reproducing system, Means for recording a transport stream in a DVD playback system without decrypting the transport stream, and decryption means for decrypting the transport stream when reproducing the transport stream recorded in the DVD video playback system. ,
It is characterized by having.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. A video playback system according to a first embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, the digital satellite broadcast receiving antenna 1 transmits a received radio wave to the tuner unit 2. The tuner unit 2 extracts a digital signal from the received radio wave and performs QPSK (Quadrature Phase Shift K).
eying) Performs demodulation and error correction to obtain the MPEG2 T
The S packet is extracted and sent to the signal control unit 3.

As shown in FIG. 2, the signal control unit 3 refers to the PID indicating the ID of the packet from the TS packet sent from the tuner unit 2 and controls the PID filter 20 for separating a necessary TS packet. Have. The PID filter 20 extracts only the video and audio information portions to be received and transfers them to the video FIFO 24 and the audio FIFO 25, respectively. The video FIFO 24 and the audio FIFO 25 are trans-stream buffers defined by the MPEG2 system standard (ISO / IEC 13818-1), and both smooth the transfer speed of video and audio streams sent in packet format. Needed to do so.

The selector switch 27 is a stream switch for selecting which of the stream in the video FIFO 24 and the stream in the audio FIFO 25 is transferred to the MPEG2 decoder 4 in response to a request from the MPEG2 decoder 4. , MPEG2
Switching is performed according to a request from the decoder 4. The selector switch 28 receives the data from the selector switch 27 and the
Which of the data from O22 and the MPEG2 decoder 4
The I / O control unit 26 has a function of switching whether to output the data.

The PID filter 20 extracts only the information part of the video and audio to be received, and
24 and the audio FIFO 25,
It also has a function of separating TS packets such as program information. PI
The TS packet separated by the D filter 20 is
Sent to FO21. The FIFO 21 burst-transfers data from the bus interface 23 to the bus memory control unit 14 via the system bus 10. FIFO21
Is used to reduce the bus occupation time of the system bus 10 and improve system performance when transferring data to the system memory 15.

As shown in FIG. 1, the MPEG2 decoder 4
Is, using the memory 5, the M received from the signal control unit 3.
PEG2 data is decoded to restore video and audio data. The TV encoder 6 converts the video information output from the MPEG2 decoder 4 into an analog NTSC signal and displays it on the TV 7. Audio DAC8 is M
The audio data output from the PEG2 decoder 4 is converted into an analog audio signal, and audio is output from the speaker 9 with the amplifier. The bus memory control unit 14 includes the CPU 1
6, access to each part of the system, writing and reading from the signal control unit 3 to and from the system memory 15, and adjustment of writing and reading from the digital storage bus interface 11 to and from the system memory 15. The system memory 15 stores a program for operating the CPU 16 and various data. The CPU 16 controls the entire system, analyzes information and provides it to information users.
It controls writing and reading of data to and from a digital storage such as the VD-ROM / RAM drive 12.

Digital storage bus interface 1
1 stores the data stored in the system memory 15 as a DV
It has a function of writing to the DVD medium 13 through the D-ROM / RAM drive 12 or reading from the DVD medium 13 and transferring it to the system memory 15. DVD-R
The OM / RAM drive 12 writes and reads data to and from the DVD medium 13 and transmits and receives data to and from the digital storage bus interface 11.

The network board 17 has a function of connecting to the network 18, writing an MPEG2 stream flowing from the network 18 to the system memory 15, and transmitting a request from a user to the VOD server 19 or the like via the network 18. is there. The VOD server 19 has a function of transferring an MPEG2 stream corresponding to a user request to the network board 17 via the network 18.

Next, the operation of the video reproduction system according to the first embodiment of the present invention shown in FIGS. 1 and 2 will be described.
In the video reproduction system of the present invention, a case where digital satellite broadcasting is received, a case where MPEG2 data recorded in digital storage such as a DVD video is reproduced, and a case where video is reproduced in a multimedia communication system such as a VOD system. Are selectively (exclusively) performed.

First, the operation of the video reproduction system when receiving a digital satellite broadcast and when recording on a digital storage medium will be described with reference to FIGS.

The radio wave received from the digital satellite broadcast receiving antenna 1 is sent to the tuner 2. The tuner unit 2 extracts digital data from the received radio wave,
After performing PSK demodulation and error correction, an MPEG2 TS packet is extracted. The extracted TS packet is sent to the signal control unit 3. The TS packet received from the tuner unit 2 has a structure as shown in FIG.
There is an identification ID called an ID (Packetized ID).
The PID filter 20 performs an operation of extracting only a specific packet using the PID. FIG. 3 shows a portion for extracting only the information portion from the video and audio packets of the received program.

First, the CPU 16 sets the value of the PID of the packet storing the video information in the video PID register 29 through the I / O control unit 26. CPU
A user inputs an operation signal to the operation input device 16 via the operation input device 16a. The comparator 30 compares the PID with the PID of the TS packet sent from the tuner unit 2, extracts a payload portion when the PID matches, and outputs the payload portion to the video FIFO 24. Similarly, the audio PID register 31
Then, the PID value of the packet in which the audio information is stored is set, and the comparator 32 compares the PID value with each other. If they match, the payload portion is extracted and output to the audio FIFO 25. FIG. 4 shows that the TS packet of the video information and the audio information is extracted only from the information part and the video FIFO 24
And an audio FIFO 25. Video information and audio information are stored in PES (Packetiz
A stream called an "ed Elementary Stream" is stored in units of packets, and the information portion is extracted and restored to return to the original PES. Therefore,
Video FIFO 24 and Audio FIFO 25
In the PES (Video PES) of video information and P of audio information
ES (Audio PES) is flowing.

In the case of receiving a digital satellite broadcast, the selector switch 28 is controlled by the CPU 16 by the I / O control unit 26.
Is set to pass the data output from the selector switch 27 to the MPEG2 decoder 4 via the. The selector switch 27 is provided with a video FIFO 24 and an audio FIFO 24 in response to a request from the MPEG2 decoder 4.
25 is selected. MPEG2 decoder 4
Is, using the memory 5, the M received from the signal control unit 3.
The PEG 2 stream is decoded, the decoded video data is passed to the TV encoder 6, and the decoded audio data is passed to the audio DAC 8. The TV encoder 6 converts the received video data into an analog NTSC signal, and performs display on the TV 7. Audio DAC8
Then, the received audio data is converted into an analog audio signal and output from the speaker 9 with the amplifier.

The PID filter 20 has a function of extracting video information and audio information and transferring them to the video FIFO 24 and the audio FIFO 25, as well as a TS packet in which program information is described and a tuner unit 2. It also has a function of separating packets and the like in which information stored in each transferred TS packet is described.
The PID filter 20 compares the PID information with the PID information as in the case of the above-described filter for video information and audio information.
However, in this case, unlike the case of the video information and the audio information, the PID filter 20 extracts the entire TS packet and sends it to the FIFO 21. PID filter 20
If video and audio packets of a currently received program or a program to be recorded are designated, the video and audio TS packets are also transferred to the FIFO 21.

The FIFO 21 has an upper threshold value and a lower threshold value, which can be set to predetermined values by the CPU 16 via the I / O control unit 26. The FIFO 21 stores up to the data amount determined by the upper threshold,
At the time when the upper limit threshold value is exceeded, a prompt to transfer data to the bus interface 23 is started. When a request to receive data from the FIFO 21 is started, the bus interface 23 requests the bus memory control unit 14 to permit writing to the system memory 15. Write the data output from. The FIFO 21 starts outputting data when the bus interface 23 responds to the data transfer request, and continues outputting until the amount of data remaining in the FIFO 21 reaches the data amount determined by the lower threshold.

The bus memory control unit 14 writes and reads from the bus interface 23 to the system memory 15, reads and writes from a digital storage medium such as the digital storage bus interface 11 to the system memory 15, and accesses the CPU 16 to each system unit. To adjust. The program information and the like written in the system memory 15 are analyzed by the CPU 16 and provided to the user. When the video and audio TS packets are transferred to the system memory 15 for the purpose of recording, only the video and audio TS packets are transferred to another area in the system memory 15 by the CPU 16 and are transmitted through the digital storage bus interface 11. , DVD-ROM / RA
A writable DVD medium 13 using an M drive 12
Can be accumulated.

Next, the operation of the video reproduction system when reproducing a digital storage medium such as a DVD video will be described with reference to FIGS. When reproducing a DVD video, the CPU 16 first sets the DVD-ROM / RA
The M drive 12 is controlled to read MPEG2 data recorded on the DVD medium 13. As a result, the DVD-ROM / RAM drive 12 transmits the MPEG
2 are read and passed to the digital storage bus interface 11. The digital storage bus interface 11 transfers the received MPEG2 stream to the system memory 15. The MPEG2 stream in the system memory 15 is transferred to the signal control unit 3. In order to increase the use efficiency of the system bus 10 during this transfer, the occupation time of the system bus 10 is shortened by using the FIFO 22 and the transfer data is burst-transferred, thereby increasing the use efficiency of the system bus 10.

The FIFO 22 has, similarly to the FIFO 21, a register for an upper threshold value and a lower threshold value.
A predetermined value can be set by the PU 16 via the I / O control unit 26. The FIFO 22 keeps requesting data until the data amount in the FIFO 22 reaches the data amount set by the upper threshold. The bus interface 23
In response to a request from the FIFO 22, the system memory 15
More data is received and sent to the FIFO 22. F
The IFO 22 stops requesting data when the upper threshold is reached. The FIFO 22 outputs an MPEG2 stream in response to a request from the MPEG2 decoder 4. When the remaining amount of the remaining data becomes smaller than the lower threshold value, the FIFO 22 starts requesting the data to the bus interface 23 again. In this manner, the system performance is improved by continuously receiving data and reducing the occupation time of the system bus 10.

The MPEG2 decoder 4 uses the memory 5 to decode the MPEG2 stream received from the signal control unit 3, passes video decoded data to the TV encoder 6, and decodes audio data to the audio DAC 8. hand over. The TV encoder 6 converts the received video data into an analog NTSC signal,
7 is displayed. The audio DAC 8 converts the received audio data into an analog audio signal, and outputs the analog audio signal from the speaker 9 with amplifier. By the above operation, DV
A function of reproducing from a digital storage medium such as D-video is realized.

Next, the operation of the video reproduction system when reproducing a video in a multimedia communication system such as a VOD system will be described with reference to FIGS. When the user selects the desired content by operating the operation input device 16a, the CPU 16 transmits the desired content to the VOD server 19 at the end of the network 18 from the CPU 16 via the network board 17. To make a request. In response to the request, the VOD server 19 sends the MPEG2 stream to the network 18. The network board 17 receives the transmitted MPEG2 stream and transfers it to the system memory 15.

MPE written to system memory 15
The data of G2 is transmitted from the system memory 15 to the signal control unit 3.
Is forwarded to In order to increase the use efficiency of the system bus 10 during this transfer, the occupation time of the system bus 10 is reduced by using the FIFO 22 and performing burst transfer of the transfer data, thereby increasing the use efficiency of the system bus 10.

The operation of the FIFO 22 is the same as that for reproducing a digital storage medium such as the DVD video described above. At the time of video reproduction in the VOD system, the selector switch 28 transmits the MPEG2 stream from the FIFO 22 to the MPU by the CPU 16 via the I / O control unit 26.
It is set to output to the PEG2 decoder 4. FI
The MPEG2 stream transferred to the FO 22 is an MP2
Output to the MPEG2 decoder 4 in response to a request from the EG2 decoder 4.

The MPEG2 decoder 4 uses the memory 5 to decode the MPEG2 stream received from the signal control unit 3, passes the decoded video data to the TV encoder 6, and the decoded audio data to the audio DAC 8. hand over. The TV encoder 6 converts the received video data into an analog NTSC signal,
7 is displayed. The audio DAC 8 converts the received audio data into an analog audio signal, and outputs the analog audio signal from the speaker 9 with amplifier. By the above operation, VO
A function of reproducing a video in a multimedia communication system such as a D system is realized.

Next, another embodiment of the present invention will be described with reference to FIGS. A pay broadcast receiving system in digital satellite broadcasting will be described with reference to FIGS. FIG. 5 shows a pay broadcast receiving system for digital satellite broadcasting.

The pay-broadcast receiving system is such that a decryption section 33 is arranged between the tuner section 2 and the signal control section 3 in the digital satellite broadcast receiving system of FIG. The CPU 16 sets the key for decryption in the decryption unit 33 via the I / O control unit 26, thereby decrypting the TS stream from the tuner unit 2.

FIG. 6 shows a flow for decrypting a pay broadcast or the like currently performed in digital satellite broadcasting. When recording and playing back with this system, DV
Data recorded on a digital storage medium such as a D medium is recorded in a decrypted state. As shown in FIG. 6, when decrypting a pay broadcast or the like,
Perform the initial setting of the pay broadcast receiving system (step S
1) Receive data (ECM) for generating a key for decrypting (step S2). Next, ECM
Data is written (step S3), and a decryption key is taken from the IC card (step S4). Next, the key is written into the decryption unit (step S5), and it is determined whether or not to continue decryption (step S6). When the decryption is continued, the process returns to step S2. If the decryption is not to be continued, the decryption process is terminated.

Next, a receiving system for digital terrestrial broadcasting will be described with reference to FIG. FIG. 7 shows the reception of digital terrestrial broadcasting scheduled in the future among digital satellite broadcasting,
1 shows a recording and playback system. In this receiving system, the same components as those in the above-described video reproducing system are denoted by the same reference numerals. The digital terrestrial broadcasting antenna 35 receives the radio wave and transmits the radio wave to the tuner unit 2. Digital terrestrial broadcasting also uses the MPEG2 video and audio compression technology, so that the MPEG2 decoder 4 can be shared. The recording and playback system uses a digital video recorder 36,
Recording is performed on the recording medium 37. The reproduction is also performed by reading the MPEG2 stream from the recording medium 37.

Next, a description will be given, with reference to FIGS. 8 to 10, of a video reproducing system in which a FIFO used for recording and reproducing is shared.

FIG. 8 shows the configuration of the signal control unit 3 when the FIFO is shared. The output of the tuner unit 2 is input to the switching unit 38 without directly entering the PID filter 20. The switching unit 38 is controlled by the CPU 16 via the I / O control unit 26, and receives data from the tuner unit 2 and
One of the data from the shared FIFO 40 is sent to the PID filter 20. The TS packet output from the PID filter 20 to the system memory 15 enters the switching unit 39.
The switching unit 39 is controlled by the CPU 16 via the I / O control unit 26, and receives data from the PID filter 20 and
One of the data from the bus interface 23 is shared F
Send to IFO40. The shared FIFO 40 has an upper threshold register and a lower threshold register.
6, a predetermined value can be set via the I / O control unit 26. With this configuration, by switching the switching units 38 and 39 and the selector switches 27 and 28, reception, recording, and reproduction of digital satellite broadcasting and reproduction of a digital storage medium can be selectively (exclusively) realized.

FIGS. 9 to 11 are connection diagrams after setting the switches in the case of realizing each of the above-described video reproduction systems. FIG. 9 is a connection diagram at the time of receiving a digital satellite broadcast. The TS packet output from the tuner unit 2 enters the PID filter 20, and the PID filter 2
The TS packet output from 0 enters the shared FIFO 40 and is transmitted to the bus interface 23.

FIG. 10 is a connection diagram for reproducing a digital storage medium such as a DVD video. The MPEG2 stream output from the bus interface 23 enters the shared FIFO 40, and the output of the FIFO 40 enters the selector switch 28. FIFO40 is MPEG2
It outputs an internal MPEG2 stream in response to a request from the decoder 4.

FIG. 11 is a connection diagram for reproducing recorded data. FIG. 11 is characterized in that the PID filter 20 is used when reproducing recorded data. The data output from the bus interface 23 is
It enters the shared FIFO 40, and the output of the FIFO 40 is P
Enter the ID filter 20. After that, the data flow
It operates in the same way as a digital satellite broadcast receiving system.

Next, in the above-described video reproduction system,
A system for decrypting data at the time of reproduction without decrypting the data at the time of recording will be described with reference to FIGS. This video reproduction system is a digital satellite broadcast reception, recording and reproduction system, which does not decrypt an encrypted program such as a pay broadcast at the time of recording, but decrypts the program at the time of reproduction. Therefore, the present system has an advantage that it can cope with the duplication problem which is a problem in digital satellite broadcasting to some extent.

In FIG. 12, the output of the tuner unit 2 is
It does not directly enter the decryption unit 33 but once enters the signal control unit 3. FIG. 13 shows a detailed configuration of the signal control unit 3. Output data from tuner unit 2 and shared FIFO
This can be realized by switching the output data of 40 by the switching unit 38 and putting the output data into the decryption unit 33.

In the present video reproduction system, when recording,
It is also necessary to record a key for decryption or data necessary for generating the key together with the recording medium.
In current digital satellite broadcasting, ECM (Entitlement Ma
It is only necessary to write a TS packet called “nagement message” together on a recording medium.

FIG. 14 is a connection diagram after setting of each switching unit when decrypting recorded data that has not been decrypted during reproduction. The data output from the bus interface 23 is data read from the digital storage medium and is not decrypted. The unencrypted data that has entered the shared FIFO 40 enters the decryption unit 33, where the decryption is performed and the PID
Enter the filter 20. Subsequent processing is the same operation as when digital satellite broadcasting is received.

[0049]

As apparent from the above description, according to the video reproducing system of the present invention, the video is reproduced by selectively using the digital satellite broadcast receiving system, the DVD video reproducing system and the VOD video reproducing system. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a video reproduction system according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a signal control unit of the video reproduction system of FIG. 1;

FIG. 3 is a diagram for explaining an operation of the video reproduction system of FIG. 1;

FIG. 4 is another diagram for explaining the operation of the video reproduction system in FIG. 1;

FIG. 5 is a block diagram showing a video reproduction system as another embodiment of the present invention.

FIG. 6 is a flowchart for explaining the operation of the video reproduction system in FIG. 5;

FIG. 7 is a block diagram showing a video reproduction system as another embodiment of the present invention.

FIG. 8 is a block diagram showing a signal control unit of a video reproduction system as another embodiment of the present invention.

9 is a block diagram illustrating one connection state of a signal control unit of the video reproduction system in FIG. 8;

FIG. 10 is a block diagram showing another connection state of the signal control unit of the video reproduction system of FIG.

11 is a block diagram showing another connection state of the signal control unit of the video reproduction system of FIG.

FIG. 12 is a block diagram showing a video reproduction system as another embodiment of the present invention.

13 is a block diagram illustrating a signal control unit and a decryption unit of the video reproduction system in FIG.

14 is a block diagram showing one connection state of a signal control unit and a decryption unit of the video reproduction system of FIG.

FIG. 15 is a block diagram showing a conventional digital satellite broadcast receiving system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Digital satellite broadcast receiving antenna 2 Tuner part 3 Signal control part 4 MPEG2 decoder 5 Memory 6 TV encoder 7 TV 8 Audio DAC 9 Speaker with amplifier 10 System bus 11 Digital storage bus interface 12 DVD-ROM / RAM drive 13 DVD medium 14 Bus Memory control unit 15 System memory 16 CPU 17 Network board 18 Network 19 VOD server 20 PID filter 21, 22 FIFO 23 Bus interface 24 Video FIFO 25 Audio FIFO 26 I / O control unit 27, 28 Selector switch 29 Video PID register 30, 32 Comparator 31 Audio PID Register 33 Decryption Unit 35 Digital Terrestrial Broadcasting Reception Antenna 36 Digital Video Orekoda 37 recording medium 38, 39 switching section 40 FIFO

Continued on front page F-term (reference) 5C053 FA13 FA20 FA23 FA24 FA25 FA28 GB11 GB15 GB21 GB38 JA21 KA05 KA08 KA11 KA24 LA06 LA07 LA14 5C059 KK43 MA00 PP14 SS09 SS13 SS30 UA05 UA11 UA31 5C064 DA06 DA07 DA08 DA12

Claims (6)

[Claims] 1. Digital satellite broadcast receiving system and DVD
In a video playback system including a video playback system and a VOD video playback system, the digital satellite broadcast reception system, the DVD video playback system, and the VOD video playback system are connected to a signal control unit of the digital satellite broadcast reception system. An MPEG2 decoder, a video display device that displays video data from the MPEG2 decoder, and an audio output device that outputs audio based on audio data from the MPEG2 decoder. The signal control unit and the DVD playback System and the VOD
A video playback system connected to a video playback system, comprising control means for controlling the signal control unit, the DVD playback system, and the VOD video playback system. 2. The video reproduction system according to claim 1, wherein the signal control unit has a PID filter, and the control unit transmits a transport stream from the digital satellite broadcast receiving system via the PID filter. Means for providing to the MPEG2 decoder by means of
Means for directly providing to the MPEG2 decoder without a filter, and a stream from the VOD video reproduction system
Means for directly providing the signal to the MPEG2 decoder without passing through an ID filter. 3. The video reproduction system according to claim 1, further comprising means for recording a transport stream from the digital satellite broadcast reception system in the DVD video reproduction system. 4. The video reproduction system according to claim 3, wherein the signal control unit has a PID filter, and the control unit transmits a transport stream from a digital satellite broadcast reception system via the PID filter. Means for providing to the MPEG2 decoder, and a stream from the DVD video playback system
Means for directly supplying the MPEG2 decoder to the MPEG2 decoder without passing through an ID filter; and when the stream from the VOD video playback system is a transport stream, the stream from the VOD video playback system via the PID filter to the MPEG2 decoder. And a means for directly supplying the stream from the VOD video reproduction system to the MPEG2 decoder without passing through the PID filter when the stream from the VOD video reproduction system is not a transport stream. Characteristic video playback system. 5. The video reproduction system according to claim 4, wherein when the transport stream from the digital satellite broadcast receiving system is encrypted, the transport stream is decrypted and transmitted to the signal control unit. A video reproduction system, comprising: a decryption means for providing the video data. 6. The video reproduction system according to claim 4, wherein when the transport stream from the digital satellite broadcast receiving system is encrypted, the transport stream is recorded in the DVD video reproduction system. Means for recording the transport stream in the DVD playback system without decrypting the transport stream; and encrypting the transport stream when reproducing the transport stream recorded in the DVD video playback system. A video reproduction system comprising: a decryption unit for decrypting.