JP2001339676A - Information processing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method to decrease a capacity of a large scale storage device that is necessary to a whole information processing equipment and reduce cost of the equipment. SOLUTION: A MPEG decode control 16 enables to access directly a system memory 22 and a HDD 25 of a personal computer 3 through a memory switch 34 and a HDD switch 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus provided with a so-called computer such as a personal computer and a digital television broadcast receiving section.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a block diagram showing a conventional information processing apparatus described in FIG. In the figure, reference numeral 1 denotes a parabolic antenna for sensing radio waves of digital television broadcasting from artificial satellites;
Is a digital television broadcast receiving unit that receives a digital television broadcast signal, executes various reception processes, and extracts image data and audio data of the digital television broadcast.

[0003] In the digital television broadcast receiving section 2, a reference numeral 11 executes transponder selection, demodulation, error correction and the like, and performs MPEG (Moving Picture Exposure) processing on the received signal.
(ertsGroup) 2 is a tuner section for extracting a transport stream, and 12 is a descrambling section for descrambling a signal which has been scrambled. Reference numeral 14 denotes an IC card that stores information necessary for receiving a pay broadcast, and reference numeral 15 denotes an IC card interface unit that reads and writes data from and to the IC card. Reference numeral 101 denotes a filter and host bus control unit which is connected to the host bus 30 of the personal computer 3, filters only predetermined packets, and outputs an MPEG2 video / audio stream to the MPEG2 decoder 102. An MPEG2 decoder 102 decodes an MPEG2 video / audio stream and supplies the decoded image data and audio data to the personal computer 3 (that is, an MPEG2 decoder configured with a dedicated LSI or the like).
A memory for temporarily storing data when decoding a PEG2 video / audio stream.

A personal computer 3 has a system memory 22, a hard disk drive 25, a CPU 21, and the like. In the personal computer 3,
21 is a CPU (Central Processing Unit), 2
Reference numeral 2 denotes a system memory that temporarily stores data and programs, and 23 denotes a boot ROM that previously stores a control program and the like that are read and executed at the time of startup.
Reference numeral 4 denotes a control unit that reads and writes data from and to the system memory 22 and the boot ROM 23 and controls the host bus 30. Reference numeral 25 denotes a hard disk drive (hereinafter, referred to as an HDD) that stores various programs and data, and reference numeral 26 denotes, for example, a SCSI (Small Compatible) that transmits and receives data between the HDD 25 and the host bus 30.
HDD interface section such as a uter system interface. Reference numeral 27 denotes an image display unit for displaying an image corresponding to the image data on the display device 4, reference numeral 28 denotes an audio reproducing unit for outputting a sound corresponding to the audio data to the speaker 5, and reference numeral 29 denotes a data via the telephone line 6. Modem. 30 is a PCI (Peripheral Component Inter
connect).

[0005] 4 is a liquid crystal display or CRT (Cathode
A display device such as a Ray Tube), 5 is a speaker, and 6 is a telephone line.

Next, the operation will be described. When receiving a program of a digital television broadcast, a CP of the personal computer 3 is used instead of a dedicated microcomputer.
U21 controls.

[0007] In the digital television broadcast receiver 2,
A broadcast radio wave from an artificial satellite is received by the tuner unit 11 via the parabolic antenna 1, and the tuner unit 11 performs transponder selection, demodulation and error correction for returning the radio wave to the original digital signal, and descrambles the MPEG2 transport stream. To the unit 12. At this time, the tuner unit 11 is controlled by the filter and host bus control unit 101.

Next, the descrambling unit 12 outputs the MPE
Upon receiving the G2 transport stream, if scramble processing has been performed, descrambling is performed. Key data for descrambling is provided by the filter and host bus control unit 101 to an IC.
The data is read from the IC card 14 via the card interface unit 15 and supplied to the descrambling unit 12.

The filter and host bus control unit 101
Via the host bus 30 of the personal computer 3,
Control data is supplied from the CPU 21 of the personal computer 3, and based on the control data, image data and audio data are extracted from the MPEG2 transport stream and supplied to the MPEG2 decoder 102.

[0010] The MPEG2 decoder 102 decodes the image data and the audio data using the memory 103 as a work area, and supplies the decoded image data to the image display unit 27 without passing through the host bus 30. The decoded audio data is transferred to the host bus 30
Is supplied to the audio reproducing unit 28 without going through the audio reproducing unit 28. Image display unit 27
Displays an image corresponding to the supplied image data on the display device 4.
, And the audio reproduction unit 28 causes the speaker 5 to output audio corresponding to the supplied audio data.

As described above, in order to receive a digital television broadcast and reproduce its image and sound, a large-capacity memory 103 is required. Further, when storing large-capacity data such as a program, Provides an HDD (not shown).

As such a memory 103, for example, a general-purpose synchronous DRAM is used today, and in order to decode a high-definition HDTV (High Definition Television) image by an MPEG2 decoder 102 having a hardware configuration, About 32 Mbytes are required.

In the personal computer 3, the control program stored in the boot ROM 23 is generally executed by the CPU 21 at the time of startup, and thereafter, the
The operating system recorded in D25 is H
The program is loaded into the system memory 22 via the DD interface 26, the host bus 30, and the control unit 24 and executed. Thereafter, an application program set in advance or instructed by the user is transferred from the HDD 25 to the HDD 25.
Interface 26, host bus 30, and control unit 24
, And is loaded into the system memory 22 and executed.

When an image display command is issued according to those programs, the CPU 21 supplies image data to the image display unit 27 via the control unit 24 and the host bus 30, and the image display unit 27 transmits the image data to the image display unit 27. The corresponding image is displayed on the display device 4. When a voice output instruction is issued in accordance with those programs, CP
U21 supplies audio data to the audio reproducing unit 28 via the control unit 24 and the host bus 30, and the audio reproducing unit 28 causes the speaker 5 to output audio corresponding to the audio data. Further, when an instruction for communication is generated according to those programs, the CPU 21 supplies a modem control instruction to the modem unit 29 via the control unit 24 and the host bus 30 and transmits / receives data.

As described above, in the personal computer 3, the system memory 22 is generally used to load various programs and temporarily store various data, and the host computer is used to store various programs and data. H via the bus 30 and the HDD interface 26
DD25 is used. In today's personal computer 3, a synchronous DRAM of about 64 Mbytes or more is generally mounted as the system memory 22.

[0016]

Since the conventional information processing apparatus is configured as described above, its use is different, so that the memory 10 used by the MPEG2 decoder 102 is used.
3 and an HDD are separately provided, and it is difficult to reduce the cost of the apparatus due to the amount of memory and HDD provided in the entire apparatus.

The filter and host bus control unit 101 and the MPEG2 decoder 1 are connected via the host bus 30.
02 may use the system memory 22 or the HDD 25 of the personal computer.
When the CPU 21 of the personal computer 3 executes the above-described filtering and decoding control, the CPU 21 needs to intervene for data transfer, and the overhead caused by the processing of the CPU 21 and the bandwidth of the host bus 30 caused by the transfer of received data. This causes problems such as pressure. In particular, for example, 20 Mbps such as HDTV
Such a problem becomes conspicuous when a plurality of MPEG2 transport streams are simultaneously processed.

Further, in the conventional information processing apparatus, a predetermined application program is started while the operating system of the personal computer 3 is being executed to control the digital television broadcast receiving process. When the user wants to watch a television program, it is necessary to load and execute the operating system of the personal computer 3 from the HDD 25 and then load and execute a predetermined application program. In addition, there is a problem that the time for these processes is required, the simplicity as a digital television receiver is impaired, and inconvenience is caused.

The present invention has been made to solve the above-described problems, and has a computer having at least a main storage memory, a large-scale recording device and a CPU, and a hardware configuration for decoding digital television broadcast data. A digital television broadcast receiver having a decoder, and to a predetermined area of a main memory of a computer,
A first switching unit for connecting either the CPU of the computer or the decoder of the digital television broadcast receiving unit, so that the main storage memory of the computer is directly shared, and the capacity of the memory required for the entire apparatus is reduced. It is an object of the present invention to obtain a reduced and low-cost information processing device.

Further, the present invention provides a computer having at least a main memory, a large-scale recording device and a CPU, a digital television broadcast receiving section having a hardware decoder for decoding digital television broadcast data, and a computer. To a large-scale recording device
A second switching unit for connecting the CPU of the computer via the bus or directly connecting the decoder of the digital television broadcast receiving unit, so that the HDD of the computer is directly shared, and the HDD required for the entire apparatus is provided. It is an object of the present invention to obtain a low-cost information processing device with a reduced capacity.

Further, the present invention includes a control program storage section storing a control program for controlling the digital television broadcast receiving section, and in a mode for receiving the digital television broadcast, the CPU stores the control program storage section. It is an object of the present invention to obtain an information processing apparatus capable of executing a control program stored in a digital television broadcast and immediately watching a digital television broadcast program after the apparatus is started.

[0022]

An information processing apparatus according to the present invention has at least a computer having a main memory, a large-scale recording device and a CPU, and a hardware decoder for decoding digital television broadcast data. A digital television broadcast receiving unit; and a first switching unit for connecting one of a CPU of the computer and a decoder of the digital television broadcast receiving unit to a predetermined area of a main memory of the computer. .

In the information processing apparatus according to the present invention, a decoder decodes an MPEG stream distributed by digital television broadcasting using a main storage memory of a computer.

The information processing apparatus according to the present invention controls the first switching unit at the time of start-up, and transfers one of the CPU of the computer and the decoder of the digital television broadcast receiving unit to a predetermined area of the main memory of the computer. One is connected.

An information processing apparatus according to the present invention includes a control program storage unit storing a control program for controlling a digital television broadcast receiving unit, and stores a digital television in a predetermined area of a main storage memory of a computer at the time of startup. When connecting the decoder of the broadcast receiving unit, CP
U executes a control program stored in the control program storage unit.

An information processing apparatus according to the present invention includes a computer having at least a main memory, a large-scale recording device, and a CPU, and a digital television broadcast receiving section having a hardware decoder for decoding digital television broadcast data. And a second switching unit for connecting a CPU of the computer to a large-scale recording device of the computer via a bus or directly connecting a decoder of a digital television broadcast receiving unit.

In the information processing apparatus according to the present invention, an MPEG stream distributed by digital television broadcasting is temporarily recorded by a decoder in a large-scale recording device of a computer and decoded.

The information processing apparatus according to the present invention controls the second switching unit at the time of startup, and connects the CPU of the computer to the large-scale recording device of the computer via the bus, or directly receives the digital television broadcast. The decoders are connected.

An information processing apparatus according to the present invention includes a control program storage section storing a control program for controlling a digital television broadcast receiving section, and receives a digital television broadcast directly to a large-scale recording apparatus of a computer at the time of startup. When the decoder of the unit is connected, the CPU executes the control program stored in the control program storage unit.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a configuration of an information processing apparatus according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a parabolic antenna for sensing the radio waves of digital television broadcasting from artificial satellites, and 2 receives digital television broadcasting signals and executes various reception processes to execute image data and digital television broadcasting. It is a digital television broadcast receiving unit that extracts audio data.

In the digital television broadcast receiving section 2, reference numeral 11 denotes a tuner section for executing selection of a transponder, demodulation, error correction and the like to extract an MPEG2 transport stream from a received signal, and reference numeral 12 denotes a signal subjected to a scrambled signal. Is a descrambling unit for descrambling the data. Reference numeral 14 denotes an IC card that stores information and the like necessary for receiving a pay broadcast. Reference numeral 15 denotes an I / O that reads and writes data from and to the IC card 14.
This is a C card interface unit.

Reference numeral 16 is connected to the host bus 30 of the personal computer 3, filters only predetermined packets, and
MPEG2 video /
An MPEG decode control unit (decoder) having a hardware configuration (that is, a dedicated LSI or the like) for decoding an audio stream and supplying the decoded image data and audio data to the personal computer 3
It is.

Reference numeral 3 denotes a personal computer (computer) having a system memory 22, a hard disk drive 25, a CPU 21, and the like. In the personal computer 3, reference numeral 21 denotes a CPU, reference numeral 22 denotes a system memory (main storage memory) for temporarily storing data and programs, and reference numeral 23 denotes a boot which stores in advance a control program which is read and executed at the time of startup. Reference numeral 24 denotes a system memory 22 and a boot ROM 23.
Is a control unit that executes reading and writing of data from and to the host bus 30. An HDD (Large-scale recording device) 25 stores various programs and data.
Reference numeral 6 denotes an HDD interface unit, such as SCSI, for exchanging data between the HDD 25 and the host bus 30. Reference numeral 27 denotes an image display unit for displaying an image corresponding to the image data on the display device 4, reference numeral 28 denotes an audio reproducing unit for outputting a sound corresponding to the audio data to the speaker 5, and reference numeral 29 denotes a data via the telephone line 6. Modem. Reference numeral 30 denotes a host bus such as a PCI.

Reference numeral 31 is operated by the user to set whether this apparatus is to function as a digital television receiver (TV mode) or to function as a normal personal computer (PC mode). A mode switch 32 is a mode switching unit that sets the operation of the apparatus to one of the TV mode and the PC mode based on a user operation on the mode switch 31. Reference numeral 33 denotes a T which stores a control program for controlling the digital television broadcast receiver 2 in the TV mode.
A V ROM (control program storage unit) 34 is provided in accordance with the operation mode set by the mode switching unit 32.
The MPEG decoding control unit 16 is connected directly to a predetermined area of the system memory 22 or the CPU
Reference numeral 21 denotes a memory switching unit (first switching unit) for connecting a predetermined area of the system memory 22, and 35 directly connects the MPEG decoding control unit 16 to the HDD 25 according to the operation mode set by the mode switching unit 32. Or HDD
Interface unit 26, host bus 30, and control unit 2
4 is an HDD switching unit (second switching unit) that connects the CPU 21 to the system memory 22 via the CPU 4.

4 is a display device such as a liquid crystal display or a CRT, 5 is a speaker, and 6 is a telephone line.

Next, the operation will be described. First, the operation when the operation mode is set to the PC mode will be described. When the apparatus is started (that is, when the power is turned on), the mode switching unit 32 supplies a control signal for notifying the operation mode selected by the user to the memory switching unit 34 and the HDD switching unit 35.

In the PC mode, the memory switching unit 34
The system memory 22 is connected to the CPU 21 via the control unit 24, and the entire area is made available to the CPU 21.

In the PC mode, the HDD switching unit 3
5 connects the HDD 25 to the HDD interface unit 26, and enables the CPU 21 to access the HDD 25 via the control unit 24, the host bus 30, and the HDD interface unit 26.

Then, the CPU 21 stores the boot ROM 23
The control program stored in the control program is first executed, and at the beginning of the control program, the setting state of the operation mode by the mode switching unit 32 is recognized via the control unit 24, and the PC
In the case of the mode, the operating system of the personal computer 3 is loaded from the HDD 25 into the system memory 22. The control program stored in the boot ROM 23 is directly executed by the CPU 21 or
Once loaded into the system memory 22, it is executed.

The CPU 21 operates according to the operating system. Thereafter, the personal computer 3 operates as a normal so-called personal computer.

Next, a case where the operation mode is set to the TV mode will be described. When the device is started (ie, when the power is turned on), the mode switching unit 32 sends a control signal for notifying the operation mode selected by the user to the memory switching unit 34.
And to the HDD switching unit 35.

In the case of the TV mode, the memory switching unit 34
A part of the entire area of the system memory 22 is directly connected to the MPEG decode control unit 16,
Make that area available.

For example, if the entire area of the system memory 22 is 6
If 4 MB, 32 MB is MPEG
An area for the decoding control unit 16 is used, and the remaining 32 megabytes are used as an area for the CPU 21. CPU
The area assigned to 21 is used as a work area for software processing for controlling the digital television broadcast receiver 2.

In the case of the TV mode, the HDD switching unit 3
5 directly connects the HDD 25 to the MPEG decoding control unit 16 so that the MPEG decoding control unit 16 can directly access the HDD 25. Thereby, the HDD 25
Can be used as a large buffer for the MPEG2 transport stream.

For example, an MPEG2 transport stream including a program transmitted as a live broadcast is represented by M
The PEG decode control unit 16 outputs the host bus 3
0 is directly written to the HDD 25 without passing through the same. At the same time, the MPEG decode control unit 16
Of the MPEG2 transport stream, which has already been written in the MPEG-2 transport stream, and decodes the image data and the audio data. The decoded image data and audio data are transmitted to the image display unit 2 of the personal computer 3.
7 is supplied to the audio reproduction unit 28, an image corresponding to the image data is displayed on the display device 4, and a sound corresponding to the sound data is output from the speaker 5.

At this time, data read and data write to the HDD 25 can normally be performed only one at a time. Therefore, time division processing is executed by hardware control by the MPEG decode control unit 16 or software control by the CPU 21, and Data read and data write are executed in parallel.

On the other hand, the CPU of the personal computer 3
21 executes the control program stored in the boot ROM 23 in the case of the TV mode, and recognizes the setting state of the operation mode by the mode switching unit 32 through the control unit 24 at the first part of the control program. In the case of the TV mode, a control program for digital television broadcast reception stored in the TV ROM 33 is executed in advance, and a control signal is supplied to the MPEG decode control unit 16 via the host bus 30. The boot ROM 23 and T
The control program stored in the ROM 33 for V
It is executed directly by U21 or executed after it is once loaded into the system memory 22.

Note that the digital television broadcast receiving section 2
Then, the broadcast radio wave from the artificial satellite is received by the tuner unit 11 via the parabolic antenna 1, and the tuner unit 11
And performs demodulation and error correction for returning a radio signal to an original digital signal, and supplies an MPEG2 transport stream to the descrambling unit 12. Upon receiving the MPEG2 transport stream, the descrambling unit 12 performs descrambling if scramble processing has been performed. The key data for descrambling is read from the IC card 14 via the IC card interface unit 15 by the MPEG decoding control unit 16 and supplied to the descrambling unit 12.

As described above, according to the first embodiment, the CPU 21 of the personal computer 3 is stored in the predetermined area of the system memory 22 of the personal computer 3.
And a memory switching unit 34 for connecting one of the MPEG decoding control units 16 of the digital television broadcast receiving unit 2, so that the system memory 22 of the personal computer 3 can be directly shared and the reception processing can be kept good. On the other hand, the memory capacity required for the entire device can be reduced, and the cost of the device can be reduced.

According to the first embodiment, the CPU 25 is connected to the HDD 25 of the personal computer 3 via the host bus 30 or the MPEG decode control unit 16 of the digital television broadcast receiving unit 2 is directly connected. The HDD switching unit 35 that performs the operation can directly share the HDD 25 of the personal computer 3.
The effect is obtained that the capacity of the HDD required for the entire apparatus can be reduced and the cost of the apparatus can be reduced while the reception processing is kept good.

Further, according to the first embodiment, there is provided a TV ROM 33 in which a control program for controlling the digital television broadcast receiving section 2 is stored. In the case of the TV mode, the CPU 21 stores the TV ROM 33 in the TV ROM 33. Since the executed control program is executed, the time required for starting the operating system or the like becomes unnecessary, and the effect that the digital television broadcast program can be watched immediately after starting the apparatus can be obtained. .

Although the above embodiment is directed to digital satellite broadcasting as digital television broadcasting, the present invention can be similarly applied to other digital broadcasting.

[0053]

As described above, according to the present invention, there is provided a computer having at least a main memory, a large-scale recording device and a CPU, and a digital television having a hardware decoder for decoding digital television broadcast data. A television receiver and a first switching unit for connecting one of the CPU of the computer and the decoder of the digital television broadcast receiver to a predetermined area of the main memory of the computer. There is an effect that the main memory of the computer is directly shared while the processing is kept good, the memory capacity required for the entire apparatus can be reduced, and the cost of the apparatus can be reduced.

According to the present invention, since the decoder is configured to decode the stream of the MPEG system distributed by the digital television broadcast using the predetermined area of the main memory of the computer, the decoder of the MPEG system can be used. There is an effect that John broadcasting can be received well.

According to the present invention, the first switching unit is controlled at the time of startup, and one of the CPU of the computer and the decoder of the digital television broadcast receiving unit is connected to a predetermined area of the main memory of the computer. With this configuration, it is possible to watch a digital television broadcast program immediately after starting the apparatus.

According to the present invention, a control program storage unit for storing a control program for controlling the digital television broadcast receiving unit is provided, and the digital television broadcast receiving unit is stored in a predetermined area of the main memory of the computer at the time of startup. When the decoder is connected, the CPU is configured to execute the control program stored in the control program storage unit, so that the user can watch a digital television broadcast program immediately after starting the apparatus. This has the effect.

According to the present invention, a computer having at least a main memory, a large-scale recording device, and a CPU, a digital television broadcast receiving section having a hardware decoder for decoding digital television broadcast data, and a computer To a large-scale recording device
A second switching unit is provided for connecting the CPU of the computer via the bus or directly connecting the decoder of the digital television broadcast receiving unit, so that the large-scale storage of the computer can be maintained while maintaining good reception processing. There is an effect that the devices can be directly shared, the capacity of a large-scale storage device required for the entire device can be reduced, and the cost of the device can be reduced.

According to the present invention, since the MPEG stream distributed by digital television broadcasting is once recorded on the large-scale recording device of the computer and decoded by the decoder, the digital television broadcasting by MPEG system is decoded. Can be satisfactorily received.

According to the present invention, the second switching unit is controlled at the time of startup, and the CPU of the computer is connected to the large-scale recording device of the computer via the bus, or the decoder of the digital television broadcast receiving unit is directly connected. Is connected, so that it is possible to watch a digital television broadcast program immediately after starting the apparatus.

According to the present invention, a control program storage unit for storing a control program for controlling a digital television broadcast receiving unit is provided, and the decoder of the digital television broadcast receiving unit is directly supplied to a large-scale recording device of a computer at the time of startup. Is connected, the CPU is configured to execute the control program stored in the control program storage unit, so that it is possible to watch a digital television broadcast program immediately after starting the apparatus. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an information processing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a conventional information processing apparatus.

[Explanation of symbols]

2 Digital television broadcast receiving unit, 3 personal computer (computer), 16 MPEG decode control unit (decoder), 21 CPU, 22 system memory (main storage memory), 25 HDD (large-scale recording device), 33 TV ROM ( Control program storage unit),
34 memory switching unit (first switching unit), 35 HDD switching unit (second switching unit).

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaji Hitai 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5C025 AA30 BA18 BA27 DA01 5C053 FA20 FA23 FA27 GB11 GB37 JA21 KA04 KA05 KA08 KA25 KA26 LA06 LA07 LA11

Claims (8)

[Claims] A computer having at least a main storage memory, a large-scale recording device, and a CPU; a digital television broadcast receiving unit having a decoder having a hardware configuration for decoding digital television broadcast data; To a predetermined area of the storage memory,
An information processing apparatus comprising: a first switching unit that connects one of the CPU of the computer and the decoder of the digital television broadcast receiving unit. 2. MPE by digital television broadcasting
2. The information processing apparatus according to claim 1, wherein the stream is distributed in the G system, and the decoder decodes the MPEG stream using a predetermined area of a main storage memory of the computer. 3. Controlling the first switching unit at the time of startup to connect one of the CPU of the computer and the decoder of the digital television broadcast receiving unit to a predetermined area of the main memory of the computer. The information processing apparatus according to claim 1, wherein: 4. A control program storage unit for storing a control program for controlling a digital television broadcast receiving unit, wherein a decoder of the digital television broadcast receiving unit is connected to a predetermined area of a main storage memory of a computer at the time of startup. 4. The method according to claim 3, wherein the CPU executes a control program stored in the control program storage unit.
An information processing apparatus according to claim 1. 5. A computer having at least a main storage memory, a large-scale recording device, and a CPU; a digital television broadcast receiving unit having a decoder for decoding digital television broadcast data; And a second switching unit that connects the CPU of the computer via a bus or directly connects the decoder of the digital television broadcast receiving unit. 6. MPE by digital television broadcasting
6. The information processing apparatus according to claim 5, wherein the stream is distributed in the G system, and the decoder temporarily records and decodes the distributed stream in a large-scale recording device of a computer. 7. Controlling the second switching unit at the time of startup to connect the CPU of the computer to the large-scale recording device of the computer via the bus or directly connect the decoder of the digital television broadcast receiving unit The information processing apparatus according to claim 5, wherein: 8. A control program storage unit for storing a control program for controlling a digital television broadcast receiving unit, wherein a decoder of the digital television broadcast receiving unit is directly connected to a large-scale recording device of a computer at startup. ,
The information processing apparatus according to claim 7, wherein the CPU executes a control program stored in the control program storage unit.