JP2003179869A - Digital broadcast recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To relieve a load on a CPU control operations of a digital broadcast recording and reproducing device and on a recording medium in the case of applying particular reproduction such as fast forward reproduction and reverse reproduction to a program recorded on the recording medium of the digital broadcast recording and reproducing device. <P>SOLUTION: A stream analysis section 3 extracts intra-coding picture (I picture) data from TS (Transport Stream) data generated by a tuner 2. A TS recording medium 7 stores the TS data. On the other hand, an I picture recording medium records the I picture data extracted from the TS data. In this case, a data management section 9a cross-references both data with each other. In the case of particular reproduction, the I picture data in the I picture recording medium cross-referenced with the TS data are used in place of the TS data stored in the TS recording medium. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast recording / reproducing apparatus having a randomly accessible recording medium.

[0002]

2. Description of the Related Art As a conventional digital broadcast recording / reproducing apparatus capable of recording / reproducing an MPEG stream adopted in digital broadcasting, there is a recording / reproducing apparatus disclosed in Japanese Patent Application Laid-Open No. 11-39850. FIG. 11 shows the Japanese Patent Laid-Open No.
It is a block diagram of the recording / reproducing apparatus disclosed by 1-39850 gazette.

In this figure, 201 is a microprocessor, 202 is a main memory, 203 is an internal bus, and 204.
Is a bus bridge, and 205 is a PCI (Periph), for example.
eral Component Intercone
ct) bus and ISA (Industry Standard)
It is an expansion bus such as an rd Architecture) bus. An I / O (Input / Output) interface 207 is connected to an external device such as a keyboard and a mouse. Reference numeral 210 is an auxiliary storage interface, and 212 is a hard disk connected to the auxiliary storage interface. Reference numeral 213 is an MPEG real-time encoder board with a built-in TV tuner, and 215 is for displaying on the display and outputting audio to the speaker.
The V processing circuit 216 is a memory (VRAM) used by the AV processing circuit 215 for image display processing.

The microprocessor 201, the main memory 202, and the bus bridge 204 include an internal bus 203.
Are connected to each other via the
The auxiliary storage interface 210, the MPEG real-time encoder board 213, and the AV processing circuit 215 are connected, and the hard disk 212 is connected to the auxiliary storage interface 210. Bus bridge 204
Internal bus 203 and expansion bus 205 such as PCI or ISA
It controls the exchange of data with.

The microprocessor 201 executes various application programs recorded on the hard disk 212 under the control of the operating system recorded on the hard disk 212, thereby, for example,
Image recording, reproduction, editing, decoding processing and other predetermined processing are performed.

MPEG real-time encoder board 2
13 is an image and sound in real time, for example MP
The data is encoded according to the standard such as EG1.
This MPEG real-time encoder board 213 is
It has a built-in TV tuner for receiving television broadcast programs.
The broadcast program received by the tuner can be MPEG-encoded. Further, the video data encoded in the MPEG stream by the MPEG real-time encoder board 213 can be recorded in the hard disk 212 via the expansion bus 205.

The AV processing circuit 215 performs display on a display and audio output to a speaker. Further, the AV processing circuit 215 has a built-in NTSC encoder, and can output an image to a display device conforming to the NTSC system such as a VTR.

By the way, since the hard disk 212 can access and write / read data at high speed, it is apparently parallel to each other by using a buffer memory (not shown) or the like for recording video data and reproducing recorded video. It is possible to do so-called multi-time viewing.

In other words, in such a recording / reproducing apparatus, it is possible to record a broadcast program in the hard disk 212 in real time and reproduce an already recorded arbitrary scene of the program being recorded. In other words, it is possible to watch the broadcast program delayed by an arbitrary time. Such a reproducing operation is called "shift reproduction" or "time shift reproduction".

Further, when the fast-forward operation or the like can be performed even in the shift reproduction, it is possible to catch up with the program being broadcast while watching the unnecessary portion of the shift-reproduced program while fast-forwarding. Such a reproducing operation is called "chase reproduction".

In the case of a conventional VTR device that uses, for example, an analog video tape as a recording medium, the recorded program cannot be reproduced unless the recording operation of the program being broadcast is completed. It is impossible to perform chasing playback operations, and these operations are major features of the digital broadcast recording / playback apparatus.

In the following description, a program being broadcast may be referred to as an "on-air program" for convenience.

[0013]

The operation of the digital broadcast recording / reproducing apparatus having the structure shown in FIG. 11 is performed based on the computer operation using a keyboard, a mouse or the like. That is, a program for performing operations such as recording and reproducing of information is recorded on the recording medium, and a CPU or a microprocessor controlling the apparatus calls an application program from the recording medium to record, reproduce, edit an image, Processing such as decoding is performed.

In the follow-up reproduction described above, the user can catch up with the on-air program by viewing the unnecessary portion while performing fast-forward reproduction. It is also possible to rewind and reproduce the image being reproduced at the time of shift reproduction. Generally, special reproduction such as fast-forward reproduction and rewind reproduction (hereinafter referred to as "special reproduction") is performed by thinning out and displaying image data.

For example, an MPEG frame is a GOP (G
loop of pictures) to maintain independence of the frames without using inter-frame prediction, and a frame of an intra-coded image (I picture) in which the entire screen is encoded in the still image mode, and a frame in one direction from the past frame. A frame based on a forward prediction coded image (P picture) obtained by coding a difference subjected to inter prediction, and a bidirectional predictive coded image (B that codes a difference between frames predicted from two frames temporally past and future (B Picture). For fast-forward playback of MPEG video, MPEG transport stream data (TS
It is necessary to search the data) for the frame to be displayed during the fast-forward reproduction. For example, when it is a P picture or a B picture, in order to display it normally, it is necessary to search and read the I picture data and the like used for the predictive coding. This also applies to rewinding reproduction.

That is, in such special reproduction, the load on the CPU and the recording medium is large due to an operation such as searching for a frame to be displayed. Therefore, in the recording / reproducing apparatus having the above-described configuration, it is essential to use a high-speed, high-performance computer and a recording medium that can be accessed at high speed, which is one of the factors leading to an increase in cost.

The present invention has been made in order to solve the above problems, and it is a digital system which can reduce the load on the performance of the CPU and the recording medium when the program recorded on the recording medium is specially reproduced. The purpose is to obtain a broadcast recording / reproducing apparatus.

[0018]

A digital broadcast recording / reproducing apparatus according to claim 1 is a digital broadcast recording / reproducing apparatus for recording and reproducing a digital broadcast, which receives the digital broadcast and reproduces the digital broadcast. TS data generating means for generating TS data, I picture extracting means for extracting I picture data from the TS data, TS recording medium for recording the TS data, and I picture for recording the I picture data Recording medium,
The TS data recorded on the TS recording medium, comprising data management means for associating the TS data recorded on the TS recording medium with the I picture data recorded on the I picture recording medium. Instead of the special reproduction of the I picture, the I picture recorded on the I picture recording medium and associated with the TS data by the data management unit is recorded.
The special reproduction is performed using picture data.

A digital broadcast recording / reproducing apparatus according to a second aspect is the digital broadcast recording / reproducing apparatus according to the first aspect, wherein each of the TS recording medium and the I-picture recording medium includes a buffer memory. Having T
Data read and write operations of the S recording medium and the I-picture recording medium are performed via the buffer memory.

A digital broadcast recording / reproducing apparatus according to a third aspect is the digital broadcast recording / reproducing apparatus according to the first or second aspect, wherein the TS recording medium and the I-picture recording medium are hard disks. It is a drive.

A digital broadcast recording / reproducing apparatus according to a fourth aspect is the digital broadcast recording / reproducing apparatus according to any one of the first to third aspects, further comprising a main screen for generating a video signal for a main screen. A screen image signal generation unit; a sub-screen image signal generation unit for generating a sub-screen video signal; and a synthesizing unit for synthesizing the main screen image signal and the sub-screen image signal. Is characterized by.

A digital broadcast recording / reproducing apparatus according to a fifth aspect is the digital broadcast recording / reproducing apparatus according to any one of the first to fourth aspects, further comprising a remote operation of the digital broadcast recording / reproducing apparatus. It is characterized in that it is equipped with a remote control device that can be used.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Preferred Embodiment> FIG. 1 is a block diagram of a digital broadcast recording / reproducing apparatus according to a first preferred embodiment of the present invention. In the figure, 1 is an antenna for receiving digital broadcasting, and 2 is a tuner having a built-in encoder for converting a broadcast program received by the antenna 1 into MPEG2 transport stream data (TS data) in real time. That is, the antenna 1 and the tuner 2
This constitutes a TS data generating means. Reference numeral 3 is a stream analysis unit as an I picture extraction unit that analyzes the TS data input from the tuner 2 and extracts the I picture data from the TS data. 6 and 7 are, for example, hard disk drives (HD
D) is a recording medium such as D), 6 is an I-picture recording medium for recording the intra-coded image (I-picture) data extracted by the stream analysis unit 3, and 7 is TS data output from the tuner 2. This is a TS recording medium for recording.

A buffer memory 8 is composed of an I picture recording buffer memory 8a, an I picture reproducing buffer memory 8b, a TS recording buffer memory 8c, and a TS reproducing buffer memory 8d. Reference numeral 9 controls the flow of data at the time of operations such as recording and reproduction, and the recorded contents of the recording media 6 and 7 and the addresses corresponding thereto are recorded in the data management unit 9a to be recorded in the respective recording media. A data controller that associates I-picture data with TS data. Furthermore, 10 is MPEG2
A decoder, 11 is a video signal generation unit, 12 is an audio signal generation unit, 13 is a mixer unit, 14 is a video output circuit, 15 is an audio output circuit, 16 is a CRT such as a television, and 17 is a speaker. A graphic generator 18 generates a graphic signal for displaying an image for the user to confirm the operation of the device.

A system controller 19 controls the operation of the entire apparatus. An input detection circuit 20 detects an instruction from the user to the system controller and sends it to the system controller 19. An input unit 21 is an interface for the user to input commands and the like to the system controller. Further, as an interface for the user to input a command or the like, the remote control device 22 that can be remotely input may be used so that the user can easily input the command.

The operation of the digital broadcast recording / reproducing apparatus according to this embodiment will be described below.

First, the operation when recording the video / audio data of the received broadcast program will be described. Broadcast radio waves are received by the antenna 1 and demodulated by the digital tuner 2 to obtain predetermined TS data. This TS data is sent to the stream analysis unit 3 and I picture data is extracted from the TS data. From the stream analysis unit 3, I picture data is output together with the input TS data.

At this time, when the user sends a broadcast program recording command to the system controller 19 via the input unit 21 or the remote controller 22, the data controller 9 controls the TS based on the control of the system controller 19.
The data is output to the recording medium 7 via the TS recording buffer memory 8c, and the I picture data is output to the recording medium 6 through the I picture recording buffer memory 8a. Then, I picture data and TS to be recorded
The data is written and recorded on the recording media 6 and 7, respectively.

Since the I picture data recorded on the I picture recording medium 6 is extracted from the TS data recorded on the TS recording medium 7, the I picture recording medium 6 and the TS recording medium are recorded. The same I-picture data will be recorded on the recording medium 7. At this time, the recorded contents and addresses of the recording media 6 and 7 are recorded in the data management unit 9a, so that the I picture data and the TS data recorded in the respective recording media are associated with each other.

Next, the operation of reproducing the recorded audiovisual data from the recording medium will be described. When the user transmits a reproduction command of a recorded program to the system controller 19 via the input unit 21 or the remote controller 22, the data controller 9 is controlled by the system controller 19 to select a predetermined stream (TS).
Data) TS based on the recorded contents of the management unit 9a
It is read from the recording medium 7 for recording. This TS data is input to the MPEG2 decoder 10 from the data controller 9 via the TS reproduction buffer memory 8d.

The MPEG2 decoder 10 receives the input T
Video and audio streams are separated and extracted from the S data, and each is decoded and output to the video signal generation unit 11 and the audio signal generation unit 12. The video signal generation unit 11 and the audio signal generation unit 12 respectively generate an audio signal and a video signal from the input stream. The video signal is sent to the mixer unit 13. At this time, the graphic generation unit 1
In the case where 8 outputs a graphic signal for displaying an image for the user to confirm the operation of the device under the control of the system controller 19, the graphic signal and the video signal from the video signal generation unit 11 are combined. To be done.
Then, it is sent to the CRT 16 via the video output circuit 14 and a predetermined video is displayed on the CRT 16. On the other hand, the audio signal is sent to the speaker 14 via the audio output circuit 12 and output as audio.

Further, the operation of performing special reproduction such as fast-forward reproduction and rewind reproduction of recorded audiovisual data will be described. The digital broadcast recording / reproducing apparatus according to the present embodiment is characterized by using I picture data recorded in an I picture recording medium when performing special reproduction of recorded audiovisual data.

For example, it is assumed that the user transmits a fast-forward reproduction command of a recorded program to the system controller 19 via the input unit 21 or the remote control device 22 while the recorded program is being reproduced. At this time, the data controller 9
The data management unit 9a searches the I-picture recording medium 6 for I-picture data associated with the scene being reproduced, and reads the I-picture data in the order of time stamps. This I picture data is input from the data controller 9 to the MPEG2 decoder 10 via the I picture reproduction buffer memory 8b, and is output to the CRT 16 as a fast-forward video.
In other words, the fast-forwarding in which the forward prediction coded image (P picture) and the bidirectional predictive coded image (B picture) are thinned out is output as the video. That is, instead of the trick play of the TS data recorded on the TS recording medium 7, the trick play is performed using the I picture data recorded on the I picture recording medium.

After that, when a normal reproduction command is input from the user, the data controller 9 causes the TS data associated with the I picture being fast-forwarded and reproduced by the data management unit 9a to be TS through the TS reproduction buffer memory 8d. It is read from the recording medium 7 for input and input to the MPEG2 decoder 10. As a result, the normal playback operation is resumed.

As described above, since the TS data recorded in the TS recording medium 6 and the I picture data recorded in the I picture recording medium 6 are associated with each other by the data management unit 9a, the two recording media are recorded. It is possible to instantly switch between 6 and 7.

In addition, during special reproduction, I can be displayed independently.
Since the reproduction is performed using the I-picture recording medium 6 in which only the picture data is recorded, the process of searching and reproducing the display frame can be simplified and the processing time can be shortened. In other words, the load on the system controller 19 and the TS recording medium 7 in trick play is reduced. Therefore, it is not necessary to use a high-speed, high-performance computer and a high-speed accessible recording medium as compared with the conventional recording / reproducing apparatus.

Therefore, it becomes possible to construct a digital broadcast recording / reproducing apparatus using a relatively inexpensive computer and recording medium. According to this configuration, it is necessary to provide an I-picture recording medium as the recording medium.
In recent years, recording media such as HDDs such as magnetic hard disks have been remarkably reduced in price, and the cost of the computer can be suppressed, resulting in a reduction in the cost of the entire apparatus.

Further, since the load on the CPU and the recording medium is reduced as compared with the conventional recording / reproducing apparatus, there is also an effect that the recording / reproducing apparatus can be easily multifunctional correspondingly.

<Second Preferred Embodiment> In the second preferred embodiment, the operation of the digital recording / reproducing apparatus according to the present invention in the case of performing a follow-up reproduction for reproducing and viewing a recorded portion while recording an on-air program.

2 and 3 are diagrams for explaining the operation in the chase reproduction of the digital broadcast recording / reproducing apparatus according to the present embodiment, and FIG. 2 is a flowchart showing the chase reproduction operation of the digital broadcast recording / reproducing apparatus. 3 is a schematic diagram showing an outline of the same operation.

The configuration of the digital recording / reproducing apparatus according to the present embodiment is the same as that shown in FIG. 1, and the description thereof is omitted here. Hereinafter, the chase reproduction operation will be described with reference to FIGS.

First, when the user inputs a recording start command by pressing the recording button using the input unit 21 or the remote control device 22, the input detection circuit 20 detects it and sends it to the system controller 19. Then, under the control of the system controller 19, the TS data and the I picture data of the on-air program received by the antenna 1 are started to be recorded on the TS recording medium 7 and the I picture recording medium 6 by the above-described normal recording operation, respectively. (S1).

At this time, the recording start point is marked on the recording start point on the recording media 6 and 7 (S2). Further, when the recording operation is performed, the recording point indicating the current recording position is marked, and the position of the recording point is updated one after another while the recording operation is performed. In the present embodiment, as in the flowchart of FIG. 2, the position of the recording point is updated in step S4 until the reproduction start command from the user is detected in step S3.

Then, reproduction from the user (chase reproduction)
When a start command is input from the input unit 21 or the remote control device 22, from the recording start point of the TS recording medium 7,
Reading of the recorded TS data is started and transmitted to the MPEG2 decoder 10 via the TS reproduction buffer memory 8d and the data controller 9. At this time TS
A reproduction point is marked at the reproduction position on the recording medium 7. Then, the program recorded by the same operation as the reproducing operation shown in the first embodiment is output. At this time, since the TS data of the on-air program is continuously recorded in the TS recording medium 7 via the TS recording buffer memory,
The recording operation of TS data and the reproducing operation of recorded TS data are apparently performed in parallel.

FIG. 3A shows the positional relationship between the recording start point R0, the recording point R1 and the reproduction point P1 on the TS recording medium 7 immediately after the start of chasing reproduction. Immediately after the start of chase playback, the playback point P
1 is marked at the same position as the recording start point R0. Further, dT represents the time difference from the recording point R1, and here the time difference immediately after the start of chasing playback is d.
T = T1.

When the reproduction point is marked, the time difference Tn between the reproduction point and the recording point is calculated (S5, S6). At this time, if the time difference dT is not 0, the recording point is further updated, and the recording operation and the reproducing operation are continuously performed in parallel (S
7).

In the follow-up reproduction, the user can catch up with the on-air program by watching the unnecessary portion while fast-forwarding the reproduction. In the present embodiment, this fast-forward reproduction is performed using the I picture data recorded on the I picture recording medium 6. A fast-forward reproduction command from the user is input unit 21 or remote control device 2.
2 from the I-picture recording medium 6 associated with the reproduction point at that time, the I-picture reproduction buffer memory 8b and the data controller 9 are input in the order of time stamps. MPEG2 decoder 1 via
Sent to 0. Then, fast-forward reproduction is performed by the same operation as that of the first embodiment. Also at this time, T of the on-air program
The I picture data extracted from the S data is continuously recorded in the I picture recording medium 6 via the I picture recording buffer memory 8a. Therefore, the I picture recording operation and the fast-forward reproduction operation are performed in parallel in appearance. Will be seen.

When the fast-forward reproduction is performed during the follow-up reproduction as described above, the time difference dT between the recording point R2 and the reproduction point P2 becomes shorter as compared with immediately after the start of the follow-up reproduction as shown in FIG. 3B. That is, the time difference dT = T at this time
If it is 2, T1> T2.

Then, while performing fast-forward reproduction, FIG.
When the time difference dT = 0 between the recording point R3 and the reproduction point P3 as shown in (c), it is considered that the chasing reproduction has caught up with the on-air broadcasting, and the reproduction operation from the TS recording medium 7 is stopped and the data controller Outputs the TS data from the stream analysis unit 3 to the MPEG2 decoder. That is, the output is switched to on-air broadcast video and audio (S8). At this time, the recording operation on the recording media 6 and 7 may be maintained as necessary.

<Third Embodiment> In the third embodiment, the reproduction speed in special reproduction such as fast-forward reproduction and rewind reproduction can be changed.

FIG. 4 is a diagram for explaining the operation when changing the fast-forward speed in the digital broadcast recording / reproducing apparatus according to the present invention, and I1, 12, I3.
.. indicates the frame of each I picture.
In the present embodiment, the configuration of the digital broadcast recording / reproducing apparatus is the same as that in FIG. 1, and therefore its explanation is omitted here.

For example, it is assumed that the I-picture recording medium I-picture data is displayed in the order shown in FIG. 4A in the fast-forward reproduction operation. At this time, I-pictures that are scattered as shown in FIGS. 8B and 8C are displayed by the user's operation. If the time between each I-picture is constant, the fast-forward speed obviously becomes higher in the order of (c), (b) and (a).

Here, the method of operation for the user to adjust the fast-forward speed may be arbitrary, for example, the input unit 21.
Alternatively, the configuration may be such that when the fast-forward button of the remote control device 22 is pressed once, (a), twice, (b), and three times, (c).

Further, the graphic generator 18 may be configured to generate the graphic signal of the image showing the fast-forward speed so that the user can confirm the image showing the current fast-forward speed during the fast-forward reproduction. FIG. 5 shows a screen display example of the CRT 16 during fast-forward reproduction.

As described above, in the conventional recording / reproducing apparatus, when performing special reproduction, the TS data is searched for the frame to be displayed during the special reproduction. For example, when it is a P picture or a B picture, in order to display it normally, it is necessary to search the I picture data and the like used for the predictive coding.

On the other hand, according to the digital broadcast recording / reproducing apparatus of this embodiment, since the special reproduction operation uses the I-picture recording medium in which only the I-picture data that can be independently displayed is used, the fast-forward speed is increased. Even if it is variable, I
It suffices to extract frames from the picture at predetermined intervals, and does not require complicated processing. Therefore, the device can be configured using a relatively inexpensive computer and recording medium.

<Fourth Embodiment> FIG. 6 is a diagram showing the structure of a digital broadcast recording / reproducing apparatus according to a fourth embodiment.
In this figure, elements having the same functions as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. Further, reference numeral 40 is a small screen MPEG2 decoder, and 41 is a small screen video signal generator. Reference numeral 42 denotes a mixer unit that combines the output signal of the video signal generation unit 11 and the output of the sub-screen video signal generation unit 41 to generate a video by the output signal of the video signal generation unit 11 as shown in FIG. As the main screen, a video signal for displaying the video by the output signal of the sub-screen video signal generation unit 41 as the sub-screen is generated.

Basic operations for recording, reproducing and special reproduction of video / audio data are as in the first and second embodiments. In this embodiment, since the MPEG2 decoder 40 for the sub-screen, the video signal generation unit 41, and the mixer unit 42 are provided, the on-air broadcast video, the normal reproduction video, and the special reproduction video are displayed on the main screen and the sub-screen. It can be displayed in any combination. 8 to 10 show the CR of the digital broadcast recording / reproducing apparatus according to the present embodiment.
The example of the display screen of T16 is shown.

As described above, only the I picture is TS
It is recorded on the I-picture recording medium 6 in association with the TS data recorded on the I-picture recording medium 7, and is recorded on the I-picture recording medium instead of the special reproduction of the TS data recorded on the TS recording medium 7. By performing the special reproduction using the I picture data, the load on the computer and the recording medium is reduced as compared with the conventional recording / reproducing apparatus. Therefore,
Such a recording / reproducing apparatus can be easily made multifunctional. In other words, it is possible to suppress the cost increase due to the multi-functionalization.

[0060]

According to the digital broadcast recording / reproducing apparatus of the first aspect, TS data generating means for receiving the digital broadcast and generating TS data of the digital broadcast;
I picture extraction means for extracting I picture data from S data, a TS recording medium for recording TS data,
An I-picture recording medium for recording I-picture data;
A data management means for associating the TS data recorded on the TS recording medium with the I picture data recorded on the I picture recording medium, and replacing the special reproduction of the TS data recorded on the TS recording medium In addition, since the trick play is performed by using the I picture data recorded on the I picture recording medium and associated with the TS data by the data management unit, it is possible to simplify the process of searching and playing the display frame during the trick play. The processing time can be shortened, and the load on the computer for controlling the operation of the apparatus and the recording medium for TS is reduced. Therefore, it is not necessary to use a high-speed and high-performance computer and a high-speed accessible recording medium as compared with the conventional recording / reproducing apparatus, which can contribute to cost reduction.

Further, since the load on the computer and the recording medium is reduced as compared with the conventional recording / reproducing apparatus, there is an effect that the recording / reproducing apparatus can be easily multifunctional correspondingly.

According to the digital broadcast recording / reproducing apparatus of the second aspect, in the digital broadcast recording / reproducing apparatus of the first aspect, each of the TS recording medium and the I-picture recording medium has a buffer memory. Since the reading and writing operations of the data of the TS recording medium and the I-picture recording medium are performed via the buffer memory, so-called multi-time viewing, which allows the recording operation and the reproducing operation to appear in parallel in parallel, is possible. It enables "shifted playback" and "chase playback".

According to the digital broadcast recording / reproducing apparatus of the third aspect, in the digital broadcast recording / reproducing apparatus of the first or second aspect, the recording medium for TS and the recording medium for I-picture have recently been reduced. Since it is a hard disk drive that is significantly priced, even if two recording media, a TS recording medium and an I-picture recording medium, are provided,
By suppressing the cost of the computer that controls the operation of the device, it is possible to reduce the cost of the entire device as a result.

According to the digital broadcast recording / reproducing apparatus of the fourth aspect, in the digital broadcast recording / reproducing apparatus of any one of the first to third aspects, a main signal for generating a video signal for a main screen is further generated. Since a screen video signal generation unit, a sub-screen video signal generation unit that generates a sub-screen video signal, and a synthesizing unit that synthesizes the main screen video signal and the sub-screen video signal, On-air broadcast video, normal playback video, and special playback video can be combined and displayed on the main screen and sub-screen.

According to a fifth aspect of the present invention, there is provided the digital broadcast recording / reproducing apparatus according to any one of the first to fourth aspects, wherein the digital broadcast recording / reproducing apparatus is remotely operated. Since the remote control device capable of performing the operation is provided, the operability of the device can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a digital broadcast recording / reproducing apparatus according to a first embodiment.

FIG. 2 is a diagram for explaining an operation in chasing playback of the digital broadcast recording / playback apparatus according to the second embodiment.

FIG. 3 is a diagram for explaining an operation in chasing reproduction of the digital broadcast recording / reproducing apparatus according to the second embodiment.

FIG. 4 is a diagram for explaining an operation when changing a fast-forward speed in the digital broadcast recording / reproducing apparatus according to the third embodiment.

FIG. 5 is a diagram showing a screen display example of a CRT during fast-forward playback in the digital broadcast recording / playback apparatus according to the third embodiment.

FIG. 6 is a configuration diagram of a digital broadcast recording / reproducing apparatus according to a fourth embodiment.

FIG. 7 is a diagram showing a configuration of a CRT display screen of a digital broadcast recording / reproducing apparatus according to a fourth embodiment.

FIG. 8 is a diagram showing an example of a display screen of a CRT of the digital broadcast recording / playback device according to the fourth embodiment.

FIG. 9 is a diagram showing an example of a CRT display screen of the digital broadcast recording / reproducing apparatus according to the fourth embodiment.

FIG. 10 is a diagram showing an example of a CRT display screen of the digital broadcast recording / reproducing apparatus according to the fourth embodiment.

FIG. 11 is a block diagram of a conventional recording / reproducing apparatus.

[Explanation of symbols]

1 antenna, 2 tuner, 3 stream analysis unit,
6 I-picture recording medium, 7 TS recording medium, 8
Buffer memory, 9 data controller, 9a data management unit, 10 MPEG2 decoder, 11 video signal generation unit, 12 audio signal generation unit, 13 mixer unit, 14
Video output circuit, 15 audio output circuit, 16 CRT, 1
7 speaker, 18 graphic generation unit, 19 system controller, 20 input detection circuit, 21 input unit, 22 remote control device, 40 sub-screen MPEG2 decoder, 41 sub-screen video signal generation unit, 42 mixer unit.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/76 H04N 5/92 HF term (reference) 5C052 AA01 AB02 AC01 5C053 FA23 GB04 GB06 GB37 HA21 JA03 JA21 KA01 KA24 LA07 5D044 AB07 BC01 CC04 CC09 DE02 DE03 DE12 DE25 DE49 DE92 EF05 FG23 GK05 GK08 GK12 HL11

Claims (5)

[Claims] 1. A digital broadcast recording / reproducing apparatus for recording and reproducing a digital broadcast, wherein the digital broadcast is received and the T of the digital broadcast is received.
TS for generating S (transport stream) data
Data generating means, I-picture extracting means for extracting I-picture (intra-coded image) data from the TS data, TS recording medium for recording the TS data, and I-picture for recording the I-picture data A recording medium, and a data management unit for associating the TS data recorded in the TS recording medium with the I picture data recorded in the I picture recording medium are recorded in the TS recording medium. Instead of the trick play of the TS data, the trick play is performed using the I picture data recorded in the I picture recording medium and associated with the TS data by the data management unit. Digital broadcast recording / playback device. 2. The digital broadcast recording / reproducing apparatus according to claim 1, wherein each of the TS recording medium and the I-picture recording medium has a buffer memory, and the TS recording medium and the I-picture recording medium are provided. A digital broadcast recording / reproducing apparatus, characterized in that data read / write operations of a picture recording medium are performed via the buffer memory. 3. The digital broadcast recording / reproducing apparatus according to claim 1, wherein the TS recording medium and the I-picture recording medium are hard disk drives. Recording / playback device. 4. The digital broadcast recording / reproducing apparatus according to claim 1, further comprising: a main-screen video signal generation unit that generates a main-screen video signal, and a sub-screen. And a synthesizing unit for synthesizing the main-screen video signal and the sub-screen video signal. 5. The digital broadcast recording / reproducing apparatus according to claim 1, further comprising a remote control device capable of remotely operating the digital broadcast recording / reproducing apparatus. Digital broadcast recording / playback device.