JP2002010202A - Data recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide multiscreen display to display a reproduced image as a picture-in-picture image at regular intervals. SOLUTION: An encoder 115 compresses and processes a video signal SV1 in a predetermined program and generates a MPEG stream, which is sent to a HD drive 107 and recorded on a hard disk. A CPU 101 generates a time and recorded location table which indicates recorded location of data corresponding to a part of the video signal SV1 in the MPEG stream at regular intervals. A RAM 104 stores the table. When an image is displayed on a multiscreen, the table is referred and the data corresponding to the part of the video signal SV1 of the predetermined program at regular intervals can be reproduced from the hard disk. A decoder 116 processes the data and obtains a video signal which is picture-in-picture image related to the part of the video signal SV1 at regular intervals displayed on the multiscreen disposed in each separated region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an MPE obtained by processing a recording video signal of a predetermined program.
The present invention relates to a data recording / reproducing apparatus suitable for application when recording and reproducing a G stream on a data recording medium such as a hard disk. Specifically, by storing a table having information indicating a recording position of data corresponding to a portion of the recording video signal at regular time intervals in the data stream recorded on the data recording medium, The present invention relates to a data recording / reproducing apparatus or the like which can display a multi-screen in which child images based on time portions are arranged in divided areas on the screen, and can easily specify a reproduction start time from the multi-screen.

[0002]

2. Description of the Related Art In recent years, video data (image data) obtained by a digital broadcast receiver has been converted to MPEG (Moving Pic).
data compression processing using the
Recording on a data recording medium such as a hard disk as a PG stream has been proposed.

As is well known, encoded data of MPEG1 and MPEG2 is represented by a hierarchical structure. Sequence layer, GOP (Group of Pic)
ture) layer, picture (Picture) layer, slice (Slice)
Layer, Macro Block Layer, Block
ck) layer.

FIG. 7 shows a sequence layer and a GOP layer. The sequence layer starts with a sequence header and ends with a sequence end. Sequence layer is 1
It is composed of more than GOPs. The GOP layer starts with a GOP header and includes a plurality (usually 10 to 15) of pictures. The first picture must be an I picture (In
tra coded Picture), followed by a P picture (Predictive coded Picture) and a B picture (Bidirect
ionally predictive coded Picture).

[0005] An I-picture is an intra-frame / in-field coded image and is coded independently of other frames / fields. The P picture is forward predicted from the temporally preceding I picture or P picture and subjected to inter-frame / inter-field coding. A B-picture is an image to be bidirectionally predicted and subjected to inter-frame / inter-field encoding, and is predictively encoded using an I picture or a P picture located before and after in time.

[0006]

In the above-described MPEG stream, the data size after compression of the original frame data varies. Therefore, when an MPEG stream recorded on a data recording medium such as a hard disk is reproduced, the reproduction time and the reproduction data amount do not have a linear relationship.

For this reason, the recording position of data for a predetermined reproduction time cannot be grasped without decoding. Therefore, it is not possible to perform multi-screen display in which a reproduced image every fixed time is set as a child image. For example, the user cannot select any child image from the multi-screen and specify a reproduction position.

Therefore, according to the present invention, it is possible to perform a multi-screen display using a reproduced image every fixed time as a child image.
It is another object of the present invention to provide a data recording / reproducing apparatus which can easily specify a reproducing position from the multi-screen.

[0009]

A data recording / reproducing apparatus according to the present invention comprises: a data recording medium; an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream; Data recording means for recording on a recording medium, storage means for storing a table having information indicating a recording position of data corresponding to a portion of the data stream corresponding to a fixed time interval of the recording video signal, based on this table, First data reproducing means for reproducing data corresponding to a portion of the recording video signal at regular intervals from the data recording medium, and a child image relating to the constant time portion of the recording video signal by processing the reproduced data; Video signal for creating a multi-screen video signal for displaying a multi-screen in which It is intended and means.

Further, the data recording / reproducing apparatus comprises: an image selecting means for selecting one child image from a plurality of child images included in the multi-screen displayed by the multi-screen video signal; A second data reproducing means for jumping to a recording position of a data recording medium on which data corresponding to the one child image recorded is recorded and starting reproduction of the data stream from the recording position; And a decoder for performing a data decompression process to obtain a reproduced video signal.

In the present invention, a recording video signal of a predetermined program is subjected to data compression processing to obtain a data stream, for example, an MPEG stream, and this data stream is recorded on a data recording medium such as a hard disk. Further, a table having information indicating a recording position of data corresponding to a portion of the recording video signal at predetermined time intervals in the data stream is created, and this table is stored in the storage unit.

Referring to this table, data corresponding to a portion of the recording video signal at regular intervals is reproduced from the data recording medium. Then, the reproduced data is processed to create a multi-screen video signal for displaying a multi-screen in which child images relating to portions of the recording video signal at predetermined time intervals are arranged in divided regions on the screen. You. With the multi-screen video signal, it is possible to display a multi-screen in which child images related to portions of the recording video signal at predetermined time intervals are arranged in divided regions on the screen.

When one child image is selected from a plurality of child images included in the multi-screen displayed as described above, data corresponding to the selected one child image is recorded based on the table. Is controlled to jump to the recording position of the data recording medium, and the reproduction of the data stream is started from this recording position. Then, a data expansion process is performed on the reproduced data stream to obtain a reproduced video signal. As described above, it is possible to easily specify the reproduction start time in a predetermined program only by selecting one child image from a plurality of child images included in the multi-screen.

Further, a data recording / reproducing apparatus according to the present invention includes a data recording medium, an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream, and recording the data stream on the data recording medium. Data recording means, and a video signal creating means for creating a multi-screen video signal for displaying a multi-screen in which child images pertaining to a portion of the recording video signal at regular intervals are arranged in divided regions on the screen, A video signal recording means for recording the created multi-screen video signal on the data recording medium in association with the data stream, and a video signal reproducing means for reproducing the multi-screen video signal from the data recording medium. .

Further, the data recording / reproducing apparatus includes a storage means for storing a table having information indicating a recording position of data corresponding to a portion of the data stream at predetermined time intervals in the data stream; Image selection means for selecting one child image from a plurality of child images included in the multi-screen displayed by the video signal, and data corresponding to the selected one child image are recorded based on the table. The apparatus further includes a data reproducing unit that jumps to a recording position of the data recording medium and starts reproduction of the data stream from the recording position, and a decoder that performs data decompression processing on the reproduced data stream to obtain a reproduced video signal. is there.

According to the present invention, a video stream of a predetermined program is subjected to data compression processing to obtain a data stream, for example, an MPEG stream, and this data stream is recorded on a data recording medium such as a hard disk. In addition, a multi-screen video signal for displaying a multi-screen in which child images related to portions of the recording video signal at predetermined time intervals are arranged in divided areas on the screen is created, and this video signal is associated with a data stream. It is recorded on a data recording medium. The multi-screen video signal is reproduced from the data recording medium, and the video signal can be used to display a multi-screen in which child images related to portions of the recording video signal at regular intervals are arranged in divided regions on the screen. Becomes

In the data stream, a table having information indicating a recording position of data corresponding to a portion of the recording video signal at predetermined time intervals is created, and this table is stored in the storage means. When one child image is selected from a plurality of child images included in the multi-screen displayed as described above, data corresponding to the selected one child image is recorded based on the table. Control is performed to jump to the recording position of the data recording medium, and reproduction of the data stream is started from this recording position.
Then, a data expansion process is performed on the reproduced data stream to obtain a reproduced video signal. As described above, it is possible to easily specify the reproduction start time in a predetermined program only by selecting one child image from a plurality of child images included in the multi-screen.

Further, the data recording / reproducing apparatus according to the present invention comprises a data recording medium, an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream, and recording the data stream on the data recording medium. Data recording means, a storage means for storing a table having information indicating a first recording position of a data stream corresponding to recording video signals of a plurality of programs recorded on a data recording medium, and data based on the table. First data reproducing means for reproducing a first part of a data stream corresponding to a recording video signal of a plurality of programs from a recording medium; and processing the reproduced first part to produce a recording video signal of a plurality of programs. A multi-screen for displaying a multi-screen in which the child images are respectively arranged in divided areas on the screen In which and a video signal generating means for generating a surface for video signals.

Further, the data recording / reproducing apparatus comprises: an image selecting means for selecting one child image from a plurality of child images included in the multi-screen displayed by the multi-screen video signal; A second data reproducing means for jumping to a recording position of the data recording medium on which data corresponding to the one child image recorded is recorded, and starting reproduction of the data stream from the recording position; And a decoder for performing a data decompression process to obtain a reproduced video signal.

In the present invention, a data stream, for example, an MPEG stream is obtained by data compression of a recording video signal of a predetermined program, and this data stream is recorded on a data recording medium such as a hard disk. Further, a table having information indicating a first recording position of a data stream corresponding to recording video signals of a plurality of programs recorded on the data recording medium is created, and the table is stored in the storage unit.

Referring to this table, the first part of the data stream corresponding to the recording video signals of a plurality of programs is reproduced from the data recording medium. Then, the reproduced first portion is processed to create a multi-screen video signal for displaying a multi-screen in which child images related to recording video signals of a plurality of programs are respectively arranged in divided regions on the screen. You. With this multi-screen video signal, it is possible to display a multi-screen in which child images relating to recording video signals of a plurality of programs are respectively arranged in divided regions on the screen.

When one child image is selected from a plurality of child images included in the multi-screen displayed as described above, data corresponding to the selected one child image is recorded based on the table. Is controlled to jump to the recording position of the data recording medium, and the reproduction of the data stream is started from this recording position. Then, a data expansion process is performed on the reproduced data stream to obtain a reproduced video signal. As described above, the reproduction program can be easily specified only by selecting one child image from a plurality of child images included in the multi-screen.

Further, a data recording / reproducing apparatus according to the present invention comprises a data recording medium, an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream, and recording the data stream on the data recording medium. And a multi-screen video signal for displaying a multi-screen in which child images related to recording video signals of a plurality of programs recorded on the data recording medium are respectively arranged in divided areas on the screen. Video signal creation means, video signal recording means for recording the created multi-screen video signal on a data recording medium,
Video signal reproducing means for reproducing the multi-screen video signal from a data recording medium.

Further, the data recording / reproducing apparatus includes a storage means for storing a table having information indicating a first recording position of a data stream corresponding to recording video signals of a plurality of programs recorded on a data recording medium; Image selecting means for selecting one child image from a plurality of child images included in the multi-screen displayed by the multi-screen video signal, and data corresponding to the selected one child image are recorded based on the table. Data reproducing means for jumping to the recording position of the data recording medium and starting reproduction of the data stream from the recording position, and a decoder for performing data expansion processing on the reproduced data stream to obtain a reproduced video signal. Further provisions are made.

In the present invention, a recording video signal of a predetermined program is subjected to data compression processing to obtain a data stream, for example, an MPEG stream, and this data stream is recorded on a data recording medium such as a hard disk. Also, a multi-screen video signal for displaying a multi-screen in which child images related to recording video signals of a plurality of programs recorded on the data recording medium are respectively arranged in divided regions on the screen is created. It is recorded on a data recording medium. The multi-screen video signal is reproduced from the data recording medium, and a multi-screen in which child images related to recording video signals of a plurality of programs recorded on the data recording medium by the video signal are respectively arranged in divided regions on the screen. It can be displayed.

Further, a table having information indicating a first recording position of a data stream corresponding to recording video signals of a plurality of programs recorded on the data recording medium is created, and this table is stored in the storage means. When one child image is selected from a plurality of child images included in the multi-screen displayed as described above, data corresponding to the selected one child image is recorded based on the table. Control is performed to jump to the recording position of the data recording medium, and reproduction of the data stream is started from this recording position. Then, a data expansion process is performed on the reproduced data stream to obtain a reproduced video signal. As described above, the reproduction program can be easily specified only by selecting one child image from a plurality of child images included in the multi-screen.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a data recording / reproducing apparatus 100 according to the first embodiment.

The data recording / reproducing apparatus 100 has a CP which forms a controller for controlling the operation of the entire apparatus.
A U (Central Processing Unit) 101 is provided.
The CPU 101 includes a bus 1 for a control system and an information system.
02. In addition, this CPU 101
A ROM (Read Only Memory) 103 storing data, programs, and the like necessary for the operation of the CPU 101;
It stores data generated under the control of 101,
RAM (Random Acc) used as a working area
ess Memory) 104 and a remote control signal SR, for example, by infrared rays from the remote controller 200.
A remote control signal receiving unit 105 that receives M and supplies it to the CPU 101 is connected.

The data recording / reproducing apparatus 100 includes a time counter 109 for obtaining time information, a buffer memory 106 for temporarily storing recorded data and reproduced data, and a hard disk (H) as a data recording medium.
HD drive 10 for recording and reproducing data for D)
7 are provided. The buffer memory 106 is connected to the bus 10
2 are connected. The HD drive 107 is connected to the bus 102 via a drive controller 108.

Further, the data recording / reproducing apparatus 100 selects a broadcast signal of a desired channel from a reception antenna 111 for receiving a broadcast signal and a plurality of broadcast signals received by the reception antenna 111, and responds to the broadcast signal. And a tuner 112 for obtaining a video signal SV1 to be transmitted. The tuning operation in the tuner 112 is controlled by the CPU 101 based on the operation of the remote controller 200 by the user.

Further, the data recording / reproducing apparatus 100
EG2 encoder 115 and MPEG2 decoder 116
And a CRT (Cathode-Ray Tube) display or LCD (Liquid Crystal Display) for displaying an image based on the video signal SV1 output from the tuner 112 or the video signal SV2 output from the decoder 116.
1 consisting of flat panel display such as
17.

The operation of the encoder 115 is controlled by the CPU 101. The encoder 115 performs an A / D (Analog-to-Digital) conversion process on the video signal SV1 output from the tuner 112 at the time of recording to obtain digital recorded video data. MPEG2 data compression processing to generate an MPEG stream for recording.

The operation of the decoder 116 is controlled by the CPU 101. This decoder 116 outputs H
MP reproduced from the hard disk by D drive 107
Data expansion processing is performed on the EG stream to generate reproduced video data, and the reproduced video data is
An A (Digital-to-Analog) conversion process is performed to obtain an analog video signal SV2. In addition, as described later, when displaying a multi-screen, the decoder 116 processes the reproduction data to create a multi-screen video signal and outputs the video signal as a video signal SV2.

The operation of the data recording / reproducing apparatus 100 shown in FIG. 1 will be described. The recording time will be described. Tuner 11
2 from the MPEG2 encoder 11
5 is supplied. In the encoder 115, A / D conversion processing is performed on the video signal SV1 to obtain digital recording video data, and further, MPEG2 data compression processing is performed on the recording video data, and the recording MPEG data is recorded. A stream is created.

The MPEG stream for recording generated by the encoder 115 is temporarily stored in the buffer memory 10.
6 is stored. Then, after that, each GOP is divided at an appropriate length, a header is added, and a PES packet is generated.
08 to the HD drive 107 and are sequentially recorded on the hard disk.

Here, the encoder 115 corresponds to the video signal SV1 of the predetermined program from the tuner 112.
A series of output MPEG streams is recorded as one file on the hard disk. Here, the video signal SV1 of the predetermined program means a series of video signals SV1 of one or a plurality of programs.

The video signal SV1 of the predetermined program
Is recorded on the hard disk, the CPU 101 creates a time / recording position table having information indicating a recording position of data corresponding to a fixed time period of the video signal SV1, for example, every 10 minutes, and stores the table in the RAM 104. Remember.

FIG. 2 shows an example of a time / recording position table corresponding to the program n. This table is
0 minute, 10 minute, 20 minutes of video signal SV1 of program n
The data of the MPEG stream corresponding to the minutes, 30 minutes,...
.., D-30, AD-30,...

A series of MPs respectively corresponding to the video signals SV1 of a plurality of programs are stored in the hard disk.
The EG stream is recorded. The CPU 101 controls the video signals S of the plurality of programs recorded on the hard disk.
A program / recording position table having information indicating the first recording position of the MPEG stream corresponding to V1 is created, and the table is stored in the RAM 104.

FIG. 3 shows an example of a program / recording position table corresponding to all programs. This table stores the MPs corresponding to the video signals SV1 of program 1, program 2, program 3, program 4,.
The beginning of the EG stream is AD-P1,
.., AD-P2, AD-P3, AD-P4,...

The program / recording position table stores the video signal S of the new program on the hard disk.
When a series of MPEG streams corresponding to V1 are recorded, or a series of MPEs corresponding to a video signal SV1 of a predetermined program recorded on a hard disk.
When the G stream is deleted, it is updated.

Next, the reproduction time will be described. When the user performs a reproduction operation by designating a predetermined program recorded on the hard disk, a series of Ms corresponding to the predetermined program are transmitted from the hard disk by the HD drive 107.
The PES packets making up the PEG stream are sequentially reproduced and temporarily stored in the buffer memory 106. After that, G consisting of the payload of each PES packet
The OP is reconstructed, and the MP composed of the reconstructed GOPs
The EG stream is supplied to the MPEG2 decoder 116.

The decoder 116 performs data expansion processing on the supplied MPEG stream to generate reproduced video data, and further performs D / A conversion processing on the reproduced video data. An analog video signal SV2 is obtained. Then, the video signal SV2 is supplied to the monitor 117, and an image based on the reproduced video signal SV2 is displayed on the monitor 117.

Here, the program to be reproduced is specified by
For example, when the user operates the remote controller 200 in a state in which a multi-screen (multi-screen of all programs) in which child images related to the video signals SV1 of a plurality of programs are arranged in divided regions on the screen is displayed on the monitor 117. Done in

The multi-screen display of all programs is as follows.
When the user gives an instruction to that effect using the remote controller 200, the operation is performed as follows. That is, the program stored in the RAM 104 as described above
Based on the recording position information in the recording position table (see FIG. 3), the CPU 101 causes the HD drive 107 to output a video signal SV of each program recorded on the hard disk.
Control is performed so that the first part of the MPEG stream corresponding to No. 1 is reproduced.

The first portion of the MPEG stream corresponding to the video signal SV1 of each program reproduced in this way is supplied to the MPEG2 decoder 116 via the drive controller 108 and the bus 102 and processed, and the video signal SV1 of each program is processed. , A multi-screen video signal for displaying a multi-screen in which the child images according to (1) and (2) are arranged in divided regions on the screen is created. Then, the multi-screen video signal is supplied to the monitor 117 as the video signal SV2, and the multi-screen of all the programs described above is displayed on the monitor 117.

FIG. 4 shows an example of a multi-screen of all programs displayed on the monitor 117. In this example, programs 1 to 4 are recorded on a hard disk. It should be noted that child images relating to the video signal SV1 of up to nine programs can be simultaneously displayed on the multi-screen.
When ten or more programs are recorded on the hard disk, two or more multi-screens are used to display child images related to the video signals SV1 of all programs.

With the multi-screen displayed as described above,
When the user operates the remote controller 200, for example, a divided region whose peripheral frame is thickened can be changed.
In this case, the program corresponding to the child image arranged in the thick divided area of the surrounding frame is designated as the program to be reproduced. In the example of FIG. 4, the peripheral frame of the divided area where the child images of the program 2 are arranged is thick, and the program 2 is designated as the program to be reproduced.

As described above, when the user performs a reproducing operation with the remote controller 200 in a state where the program to be reproduced on the multi-screen of all programs is specified, C
The PU 101 determines the HD drive 1 based on the recording position information of the designated program in the program / recording position table (see FIG. 3) stored in the RAM 104.
Control is performed so that the reproduction position 07 jumps to the recording position of the designated program and starts reproduction from that position. As a result, a series of MPEG streams corresponding to the program specified as the program to be reproduced is reproduced from the beginning, and the monitor 117 displays an image of the specified program by the reproduced video signal SV2.

In a state where a program to be reproduced on the multi-screen of all programs is specified, the user can further specify a reproduction start time of the specified program.
This reproduction start time is specified on the monitor 117 by displaying a multi-screen (multi-screen in the program) in which child images related to portions of the video signal SV1 of the specified program at predetermined time intervals are arranged in divided regions on the screen. This is performed by the user operating the remote controller 200 in the displayed state.

The display of the multi-screen in this program is as follows.
When the user gives an instruction to that effect using the remote controller 200, the operation is performed as follows. That is, based on the recording position information of the time / recording position table (see FIG. 2) corresponding to the designated program stored in the RAM 104 as described above, the CPU 101
The drive 107 controls so that data corresponding to a portion of the video signal SV1 of the specified program recorded at a fixed time interval recorded on the hard disk is reproduced.

The data reproduced in this manner is supplied to the MPEG2 decoder 116 via the drive controller 108 and the bus 102 and processed, and a sub-image of the video signal SV1 of the designated program is displayed on the screen by a fixed time portion. , A multi-screen video signal for displaying the multi-screen arranged in each of the divided areas is generated. The multi-screen video signal is a video signal SV2.
Is supplied to the monitor 117, and the monitor 117
The multi-screen in the above program is displayed.

FIG. 5 shows an example of a multi-screen in the program displayed on the monitor 117. In this example, the video signal SV1 of the designated program is changed from 40 minutes to 5 minutes.
0 minutes long, 0 minutes, 10 minutes, 20 minutes, 3
This is an example of a case where a child image is displayed by a portion of 0 minutes and 40 minutes. Note that up to nine child images can be simultaneously displayed on the multi-screen. If the video signal SV1 of the designated program is longer than 100 minutes,
All child images are displayed using two or more multi-screens.

With the multi-screen displayed in this manner,
When the user operates the remote controller 200, for example, a divided region whose peripheral frame is thickened can be changed.
In this case, a time corresponding to the child image arranged in the thick divided region of the surrounding frame is designated as the reproduction start time. In the example of FIG. 5, the peripheral frame of the divided region in which the child image of 20 minutes is arranged is thick, and this 20 minutes is designated as the reproduction start time.

As described above, when the user performs a reproduction operation with the remote controller 200 in a state where the reproduction start time is specified on the multi-screen in the program, the CPU 10
1 is based on the recording position information of the reproduction start time in the time / recording position table (see FIG. 2) stored in the RAM 104, the reproduction position of the HD drive 107 jumps to the recording position, and the reproduction is started from the position. Control to start. As a result, a series of MPEG streams corresponding to the program specified as the program to be reproduced is reproduced from the recording position corresponding to the specified reproduction start time, and the monitor 117 displays a reproduction video signal of the specified program. An image based on the reproduced video signal SV2 from the designated reproduction start time is displayed.

As described above, in the first embodiment, the program / recording position table having information indicating the first recording position of the MPEG stream corresponding to the video signal SV1 of a plurality of programs recorded on the hard disk And the table is stored in the RAM 104.

Therefore, by referring to this table, the first part of the MPEG stream corresponding to the video signals SV1 of a plurality of programs can be reproduced from the hard disk,
By processing the reproduced first portion, a multi-screen (multi-screen of all programs) in which child images related to the video signals SV1 of a plurality of programs are respectively arranged in divided regions on the screen can be displayed on the monitor 117. The user can easily confirm the program recorded on the hard disk by using the multi-screen, and can easily specify the program to be reproduced.

In the first embodiment,
A series of Ms corresponding to the video signal SV1 of the predetermined program
When the PEG stream is recorded on the hard disk, a time / recording position table having information indicating a recording position of data corresponding to a portion of the video signal SV1 at regular time intervals is created, and the table is stored in the RAM 104. is there.

Therefore, by referring to this table, data corresponding to a portion of the video signal SV1 of the predetermined program at regular time intervals can be reproduced from the hard disk. A multi-screen (multi-screen in a program) in which child images relating to portions for each time are arranged in divided regions on the screen can be displayed on the monitor 117. The user can use this multi-screen to, for example, output a video signal SV of a program to be reproduced.
It is possible to easily confirm the image of the portion of each of the predetermined time intervals and to easily designate the reproduction start time.

Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 6, FIG.
The same reference numerals are given to the portions corresponding to and the detailed description will be omitted.

In the data recording / reproducing apparatus 100A shown in FIG. 6, the tuner 112 outputs an MPEG stream. This MPEG stream is MPEG
2 decoder 116. Also, this MPEG2
The video signal output from the decoder 116 is MPRG2
It is input to the encoder 115.

At the time of recording, the MPEG stream output from the tuner 112 is transmitted to the MPEG2 decoder 1.
Then, the video signal SV1 is obtained as a video signal to be recorded.
It is supplied to the G2 encoder 115. Other operations at the time of recording and operations at the time of reproduction are the same as those of the data recording / reproducing apparatus 100 of FIG. 1 described above.

As described above, in the second embodiment,
Even when an MPEG stream is output from the tuner 112, the MPEG stream is expanded by the MPEG2 decoder 116 and the video signal S to be recorded is recorded.
V1 is obtained, and the same recording and reproduction are performed as in the data recording and reproducing apparatus 100 shown in FIG. 1, so that the same operation and effect can be obtained.

In the above embodiment, the first part of the MPEG stream corresponding to the video signals SV1 of a plurality of programs is reproduced from the hard disk based on the program / recording position table (see FIG. 3), and the reproduction is performed. The first part is processed to create a multi-screen video signal for displaying a multi-screen (multi-screen of all programs) in which child images relating to video signals SV1 of a plurality of programs are respectively arranged in divided areas on the screen. , The multi-screen of the entire program is displayed on the monitor 117, but this multi-screen video signal is created in advance,
When the multi-screen video signal is recorded on the hard disk and the multi-screen of all programs is displayed on the monitor 117, the multi-screen video signal may be reproduced from the hard disk and used.

The multi-screen video signal is generated when a series of MPEG streams corresponding to the video signal SV1 of the new program is recorded on the hard disk.
Alternatively, when a series of MPEG streams corresponding to the video signal SV1 of the predetermined program recorded on the hard disk is deleted, the stream is updated.

In the above embodiment, the time
Based on the recording position table (see FIG. 2), data corresponding to a portion of the video signal SV1 of the predetermined program is reproduced from the hard disk at a predetermined time interval, and the reproduced data is processed to process the data at a predetermined time interval of the video signal SV1. A multi-screen video signal for displaying a multi-screen (multi-screen in a program) in which child images related to the portion are arranged in divided areas on the screen is created, and the multi-screen in the program is displayed on the monitor 117. However, this multi-screen video signal is created in advance, the multi-screen video signal is recorded on a hard disk in association with a series of MPEG streams of a predetermined program, and the multi-screen in the predetermined program is monitored by the monitor 117. When displaying video on a multi-screen video signal from the hard disk Unishi may be.

In the above embodiment, the created time / recording position table (see FIG. 2) and the program / recording position table (see FIG. 3) are described as being stored in the RAM 104. May be recorded on a hard disk, and reproduced and used as needed.

Further, in the above-described embodiment, the case where a hard disk is used as a data recording medium has been described, but it is a matter of course that the present invention is not limited to this. Furthermore, in the above-described embodiment, the MPEG stream is recorded, but the present invention can be similarly applied to the case of recording other variable bit rate data streams.

[0069]

According to the present invention, it is possible to display a multi-screen in which child images relating to recording video signals of a plurality of programs are respectively arranged in divided areas on a screen, and a user can display a plurality of screens recorded on a data recording medium. The content of the program can be easily confirmed, and the program to be reproduced can be easily specified. Further, according to the present invention, it is possible to display a multi-screen in which child images of portions of a recording video signal of a predetermined program at predetermined time intervals are arranged in divided areas on the screen, and the user can record a video signal of a program to be reproduced It is possible to easily confirm the image of the portion at a predetermined time interval and to easily specify the reproduction start time.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a data recording / reproducing apparatus according to a first embodiment.

FIG. 2 is a diagram illustrating an example of a time / recording position table corresponding to a program n.

FIG. 3 is a diagram showing an example of a program / recording position table corresponding to all programs.

FIG. 4 is a diagram showing an example of a multi-screen of all programs.

FIG. 5 is a diagram showing an example of a multi-screen in a program.

FIG. 6 is a block diagram illustrating a configuration of a data recording / reproducing device according to a second embodiment.

FIG. 7: Sequence layer of MPEG encoded data, GOP
FIG.

[Explanation of symbols]

 100, 100A Data recording / reproducing apparatus 101 CPU 105 Remote control signal receiving unit 106 Buffer memory 107 HD drive 108 Drive controller 109 Time counter 111 Receiving antenna 112 Tuner 115 MPEG2 encoder 116 MPEG2 decoder 117 Monitor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/765 H04N 5/781 510D 5/781 F-term (Reference) 5C025 BA27 CA06 DA01 DA08 5C053 FA06 FA20 FA23 FA27 GB37 JA22 LA05 LA06 LA07 5D044 AB07 BC01 CC04 DE14 DE37 FG19 FG23 GK08 HL04 HL14 5D110 AA13 AA28 CA05 CA09 CA43 CC03 DA17 DB02 DE01

Claims (12)

[Claims] 1. A data recording medium, an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream, a data recording means for recording the data stream on the data recording medium, and the data stream A storage means for storing a table having information indicating a recording position of data corresponding to a portion of the recording video signal corresponding to a predetermined time interval; and, based on the table, a constant value of the recording video signal from the data recording medium. First data reproducing means for reproducing data corresponding to a portion for each time; processing the reproduced data to convert a child image relating to a portion for each fixed time of the recording video signal into a divided area on a screen; Video signal generating means for generating a multi-screen video signal for displaying the multi-screen arranged respectively. Data recording and reproducing apparatus characterized. 2. An image selecting means for selecting one child image from a plurality of child images included in the multi-screen displayed by the multi-screen video signal, based on the table, A second data reproducing means for jumping to a recording position of the data recording medium on which data corresponding to the child image is recorded and starting reproduction of the data stream from the recording position; 2. The data recording / reproducing apparatus according to claim 1, further comprising: a decoder for performing a decompression process to obtain a reproduced video signal. 3. The data recording / reproducing apparatus according to claim 1, wherein the data stream is an MPEG stream. 4. A data recording medium; an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream; a data recording means for recording the data stream on the data recording medium; Video signal generating means for generating a multi-screen video signal for displaying a multi-screen in which child images relating to portions of the signal at predetermined time intervals are arranged in divided regions on the screen; and the multi-screen video created above A data recording and reproducing method comprising: a video signal recording means for recording a signal on the data recording medium in association with the data stream; and a video signal reproducing means for reproducing the multi-screen video signal from the data recording medium. apparatus. 5. A storage means for storing a table having information indicating a recording position of data corresponding to a portion of the recording video signal at predetermined time intervals in the data stream, and a table displayed by the multi-screen video signal. Image selection means for selecting one child image from a plurality of child images included in the multi-screen, and the data recording in which data corresponding to the selected one child image is recorded based on the table. Data reproducing means for jumping to a recording position of a medium and starting reproduction of the data stream from the recording position; and a decoder for performing data decompression processing on the reproduced data stream to obtain a reproduced video signal. The data recording / reproducing apparatus according to claim 4, wherein 6. The data recording / reproducing apparatus according to claim 4, wherein said data stream is an MPEG stream. 7. A data recording medium; an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream; a data recording unit for recording the data stream on the data recording medium; Storage means for storing a table having information indicating a first recording position of a data stream corresponding to a recording video signal of a plurality of programs recorded on the medium; and, based on the table, the plurality of programs from the data recording medium. First data reproducing means for reproducing a first part of a data stream corresponding to a recorded video signal of the plurality of programs, and processing the reproduced first part to display a child image relating to the recorded video signals of the plurality of programs on a screen. The multi-screen video signal for displaying the multi-screen arranged in the upper divided area Data recording and reproducing apparatus comprising: a video signal producing means for forming. 8. An image selecting means for selecting one child image from a plurality of child images included in the multi-screen displayed by the multi-screen video signal, based on the table, A second data reproducing means for jumping to a recording position of the data recording medium on which data corresponding to the child image is recorded and starting reproduction of the data stream from the recording position; 8. The data recording / reproducing apparatus according to claim 7, further comprising a decoder for performing a decompression process to obtain a reproduced video signal. 9. The data recording / reproducing apparatus according to claim 7, wherein the data stream is an MPEG stream. 10. A data recording medium, an encoder for performing a data compression process on a recording video signal of a predetermined program to obtain a data stream, a data recording means for recording the data stream on the data recording medium, and the data recording A video signal generating means for generating a multi-screen video signal for displaying a multi-screen in which child images relating to recording video signals of a plurality of programs recorded on a medium are respectively arranged in divided areas on the screen; A video signal recording means for recording the multi-screen video signal on the data recording medium; and a video signal reproducing means for reproducing the multi-screen video signal from the data recording medium. . 11. A storage means for storing a table having information indicating a first recording position of a data stream corresponding to recording video signals of a plurality of programs recorded on the data recording medium; Image selecting means for selecting one child image from a plurality of child images included in the displayed multi-screen; and data corresponding to the selected one child image are recorded based on the table. Data reproducing means for jumping to a recording position of the data recording medium and starting reproduction of the data stream from the recording position; and a decoder for performing data decompression processing on the reproduced data stream to obtain a reproduced video signal. The data recording / reproducing apparatus according to claim 10, wherein: 12. The data recording / reproducing apparatus according to claim 10, wherein the data stream is an MPEG stream.