JP2000324439A - Digital bit stream recording and reproducing device and medium for recording program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convenient AV data recording and reproducing device with which the contents of all programs recorded in a recording tape is instantly grasped and retrieved by outputting it in multi-screen as moving images and to provide a medium for recording program. SOLUTION: Quick access to program searching of a video-recorded program and the intuitive and comprehensive grasping of video-recorded contents are realized by using a digital bit stream recording and reproducing device 10 which records sample video corresponding to the program of a recording tape in a VTR 2 through the use of an HDD 3 to display all the sample images on one screen by a multi-screen display part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a digital bit stream recording / reproducing apparatus for recording / reproducing AV data as a digital bit stream and a program recording medium.

[0002]

2. Description of the Related Art Conventionally, MPEG (Moving Picture E)
A technique of recording and reproducing video / audio data (AV data) as digital data by using a technology such as xperts Group) has become widespread. FIG. 8 shows a conventional MP
FIG. 1 is a diagram illustrating a configuration of a digital AV data recording / reproducing apparatus that records and reproduces an EG stream and displays AV data.
As shown in the figure, the digital AV data recording / reproducing device 80
, The data VTR 81 is (for example, MPEG compliant)
Means for receiving a stream input;
Reference numeral 2 denotes a unit for processing an input from the data VTR 82.

[0003] The operation of the digital AV data recording / reproducing apparatus having such a configuration is as follows. When the data VTR 81 receives an input of an MPEG stream from the outside, the data is directly recorded on a video tape. On the other hand, when performing reproduction, the data VTR 81 uses the MPEG stream recorded on the video tape as it is in the decoder 8.
Output to 2. Upon receiving the MPEG stream, the decoder 82 decodes the MPEG stream and outputs it as digital AV data to the outside of the digital AV data recording / reproducing device 80.

[0004]

However, such an AV data recording / reproducing apparatus according to the prior art uses a magnetic tape as a recording medium in the same manner as a conventional analog VTR. At times, there were the following problems. In other words, when recording a plurality of programs on one video tape, when playing back the recorded program, you need to select the program you want to watch, that is, you need to perform a program search, but since magnetic tapes can only be searched sequentially, It takes time to find and check each recorded program.

[0005] Further, in a conventional VTR, an index display of a program name recorded using a subcode is displayed on a screen during program search, but these display only characters. However, there is a disadvantage that it is difficult to intuitively grasp the contents of the recording, and the convenience is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the contents of all programs recorded on a recording tape can be immediately grasped and searched by outputting the contents of a multi-screen as a moving image. It is an object of the present invention to provide an AV data recording / reproducing apparatus and a program recording medium with high reliability.

[0007]

In order to achieve the above object, a first aspect of the present invention (corresponding to claim 1) is to provide a digital bit stream obtained by encoding AV data with high efficiency in a predetermined file unit. First recording / reproducing means for recording / reproducing, second recording / reproducing means for detecting a sample of predetermined data from each of the predetermined files and recording / reproducing the sample as a sample AV stream; Two
A decoder for decoding a digital bit stream reproduced by the recording / reproducing means to decode AV data; and a sample AV data which is a signal obtained by decoding the sample AV stream by the decoder. Sample AV data display processing means for simultaneously reproducing the whole or part of each program of the bit stream according to the number of the programs, and the first recording and reproducing means comprises:
Digital bit stream recording / reproduction, wherein the digital bit stream is reproduced in file units to which the selected sample AV data belongs by externally selecting the sample AV data displayed by the sample AV data display processing means. Device.

Further, the second invention (corresponding to claim 3)
A first recording / reproducing means for recording / reproducing a digital bit stream obtained by encoding the AV data with high efficiency in a predetermined file unit; and a first recording / reproducing means for decoding a predetermined file of the AV data obtained by decoding the digital bit stream. A sample of predetermined data is detected, and this is
Second recording / reproducing means for recording and reproducing data, and sample AV data for simultaneously reproducing the sample AV data in accordance with the number of all or a part of each program of the digital bit stream recorded by the first recording means. Display processing means, wherein the first recording / reproducing means externally selects the sample AV data displayed by the sample AV data display processing means to convert the digital bit stream into the selected sample AV data. A digital bit stream recording / reproducing apparatus characterized in that reproduction is performed in file units to which the digital bit stream belongs.

Further, a third aspect of the present invention (corresponding to claim 4)
A first recording / reproducing means for recording / reproducing a digital bit stream obtained by performing a first high-efficiency encoding of AV data in a predetermined file unit, and a first decoder for decoding the digital bit stream to decode the AV data When,
A sample of predetermined data is detected from each predetermined file of the AV data output by the decoder, and is sampled by performing a second high-efficiency encoding which is a lower order encoding than the first high-efficiency encoding. An encoder for an AV stream, a second recording / reproducing means for recording / reproducing the sample AV stream, a second decoder for decoding the sample AV stream to produce sample AV data,
Sample AV data display processing means for simultaneously reproducing the sample AV data in accordance with the number of all or a part of each program of the digital bit stream recorded by the first recording means; Means are
Digital bit stream recording characterized in that a digital bit stream is reproduced in units of files to which the selected sample AV data belongs by externally selecting sample AV data displayed by the sample AV data display processing means. It is a playback device.

[0010] A fourth aspect of the present invention (corresponding to claim 14).
Is a program recording medium on which a program for causing a computer to execute all or a part of the digital bit stream recording / reproducing apparatus of claims 1 to 13 is executed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a diagram showing a configuration of a digital bit stream recording / reproducing apparatus according to Embodiment 1 of the present invention. As shown in the figure, in the digital bit stream recording / reproducing apparatus 10, the VTR 2 and the hard disk drive (HDD) 3 are means for recording / reproducing a digital bit stream, and the switch 4a is a VTR 2 and an HD.
Means for selectively receiving input from D3, decoder 5
Means for receiving an input from the switch 4a, a multi-screen display unit 6 for processing a signal input from the decoder 5, a switch 4b for selectively receiving input from the decoder 5 and the multi-screen display unit 6, Control unit 7
Is a means for receiving a command from the multi-scene display unit 6 and the command input terminal 9, operating the VTR 2 and switching the switches 4a and 4b. The bit stream input terminal 1 is means for receiving an input of a digital bit stream such as an MPEG stream, and the AV data output terminal 8 is a digital bit stream recording / reproducing device 1.
The command input terminal 9 is a means for outputting AV data to the outside of the device 0, and is a means for receiving an external input command.

Embodiment 1 having the above configuration
Will be described below.

First, the recording operation will be described. T
A digital bit stream obtained by encoding AV data including content such as a V program with high efficiency is input to the VTR 2 and the HDD 3 via the bit stream input terminal 1. However, here, this high efficiency coding is performed by MPE.
G.

The VTR 2 is preprogrammed with program reservation settings by a user. When an MPEG stream is input according to the reservation program, program information in the MPEG stream is detected.
Start recording content on a program-by-program basis and
D3 is notified by a recording start command that the recording of the MPEG stream has started.

On the other hand, while the HDD 3 is in a standby state,
Upon receiving a recording start command from R2, the recording state is entered from the standby state, and the program MP
The EG stream is recorded as a sample stream for a predetermined time. The predetermined time can be set in advance by the user or may be a fixed value. Also, it is automatically calculated based on the program information included in the MPEG stream, and added to the above-mentioned recording start command,
You can also notify

When the recording operation of the HDD 3 is started, the program (content) recorded on the recording tape accommodated in the VTR 2 and the program (content) recorded on the HDD 3 are recorded.
The correspondence with the sample stream including the data of the contents (samples) extracted from the program is generated as sample correspondence information, and the VT is recorded in parallel with the recording of the MPEG stream.
For example, it is recorded on the subcode recording area and the HDD 3 of the recording tape of R2. Subsequent recording operation is performed by the conventional A
This is performed in the same manner as the V data recording / reproducing apparatus.

If such a recording operation is repeatedly performed on the same tape, one MPEG stream recording tape on which a plurality of desired programs are recorded as contents is completed. In addition, the digital bit stream recording / reproducing device 10 records a sample stream, which is an MPEG stream including a sample extracted from each of a plurality of programs included in the MPEG stream recording tape, on the HDD 3. Become. Here, FIG.
FIG. 4 is a diagram showing a correspondence relationship between an MPEG stream and a sample stream recorded on the VTR 2 and the HDD 3. As shown in the figure, the beginning of each program is recorded on the HDD 3 as a sample stream corresponding to the program recorded on the recording tape.

Next, the reproducing operation will be described. The digital bit stream recording / reproducing apparatus according to the first embodiment of the present invention has two types of reproduction modes, a normal reproduction mode and a program search mode, and the control unit 7 performs switching according to an input command from the command input terminal 9.

First, the normal reproduction mode will be described. In the normal playback mode, the switch 4 is controlled by the control unit 7.
a connects the VTR 2 to the decoder 5, and the switch 4b connects the decoder 5 to the AV data output terminal 7, respectively. Subsequently, the VTR 2 reproduces the recorded MPEG stream and outputs it to the decoder 5 via the switch 4a.

Upon receiving the input of the MPEG stream, the decoder 5 performs decoding, which is the inverse conversion of high-efficiency coding, to decode the AV data. Subsequently, the decoder 5
Outputs AV data to the outside via the switch 4b. The output AV data is displayed as video on a display such as a television (not shown), and audio is output from a device such as a speaker.

Next, the program search mode will be described. In the program search mode, the switch 4a connects the HDD 3 to the decoder 5, and the switch 4b connects the decoder 5, the multi-screen display unit 6, and the output terminal 7, respectively.

Subsequently, the HDD 3 searches and checks the recording tape in the VTR 2 and the sample correspondence information recorded therein, reproduces a sample stream corresponding to the program recorded on the recording tape, and switches Output to the decoder 5 via 4a.

When the decoder 5 receives the input of the sample stream, the decoder 5 performs decoding, which is the inverse transform of the high-efficiency coding, to decode the sample AV data, which is the AV data equivalent to the sample stream length. Then the decoder 5
Outputs the sample AV data to the multi-screen display unit 6.

When receiving the input of the sample AV data, the multi-screen display unit 6 can display all the program samples recorded on the VTR 2 included in the sample AV data as images at once on the display. So that
Output to the outside via the switch 4b. FIG. 3 shows the state of this image output.

FIG. 3 is a diagram showing a state where the sample AV data processed by the multi-screen display unit 6 is displayed at a time on a display such as a television. As shown in the figure, on the screen 20, sample AV data is divided and displayed for each program, and each screen indicates each program recorded on the tape of the VTR 2. However, here, as an example, sample A of nine programs
It is assumed that V data is displayed.

The user arbitrarily selects one program from the screen 20 on which the sample AV data for the nine programs is displayed. The selected screen is illuminated so as to be distinguishable from other screens by, for example, coloring the edges, as in “Program 4” shown in the figure, and the audio data of the sample AV data is reproduced at the same time. . Other screens simply reproduce only image data as selection candidate programs. This selection can be arbitrarily switched until it is completely determined, and each time the program is changed, the audio signal is also switched at the same time.

When the user determines a program to be reproduced, the user outputs the selection command as a selection command command to the control unit 7 via the command input terminal 9.

When receiving the selection command, the control unit 7 controls the VTR 2 to search for the program corresponding to the selection command from the recording tape, and switches the switches 4a and 4b to the normal reproduction mode. VTR
2 receives the control from the control unit 7, searches for the specified program at the beginning, and thereafter, in the same manner as the operation in the normal reproduction mode described above, the program (content) is displayed on the screen 20 by the conventional TV / Similar to video playback, it is displayed as a single video.

In this embodiment, the VTR 2 and the control unit 7 have been described as independent means. However, as an integrated configuration, the VTR 2 receives an input of a direct selection command command and switches the switch. May be performed.

In addition, the description has been given assuming that the operation of starting the programmed recording of the program of the VTR 2 is automatically performed based on the detection of the program information in the MPEG stream. It may be performed by doing.

Although the setting of sample stream recording to be recorded by the HDD 3 has been described as being based on a predetermined time set in advance, the present invention is not limited to this.
For example, it may be set by calculating proportionally from the data amount of the corresponding content. The recording start position of the sample stream may not always be the beginning of the corresponding content, and a portion where the content of the content can be most accurately captured may be set.

The sample correspondence information for providing correspondence between the program recorded on the recording tape of the VTR 2 and the sample stream of the program recorded on the HDD 3 is MPEG.
The program information itself included in the stream may be indexed and generated. In the case of program recording, the time code may be the local time of the clock inside the VTR 2 at the start of program recording. As long as the compatibility between the MPEG stream in the HDD and the sample stream in the HDD 3 is maintained, any information used for recording may be used.

Also, in the present embodiment, the multi-screen display unit 6 divides one screen 20 into nine screens of the same size and displays the screen, but the present invention is not limited to this. For example, as shown in FIG. 4, one sample screen is displayed in large size as a selected program, and another sample screen is displayed as a selection candidate program in parallel with a smaller size below the large sample screen. It may be. The present invention is not limited to this, and it is only necessary to adjust the size and arrangement of the image and output the audio signal from the sample AV data so that the user can sufficiently distinguish the selected program from the selected candidate program. (Embodiment 2) FIG. 5 is a diagram showing a configuration of a digital bit stream recording / reproducing apparatus according to Embodiment 2 of the present invention. As shown in the figure, in the digital bit stream recording / reproducing apparatus 20, the same reference numerals as those in FIG. 1 denote the same parts or the same means, and the switch 4c switches the input from the bit stream input terminal 9 and the input from the VTR 2 Is a means for selectively accepting Also, the HDD 3
Unlike the first embodiment, it is arranged between the decoder 5 and the multi-screen display unit 6.

Embodiment 2 having the above configuration
Will be described below.

First, the recording operation will be described. First, the control unit 7 controls the switch 4c to
c connects the stream input terminal 1 to the decoder 5. Next, a digital bit stream obtained by highly efficient encoding of AV data including content such as TV programs,
The signals are input to the VTR 2 and the decoder 5 via the bit stream input terminal 1. However, the high-efficiency coding in the second embodiment is similar to the first embodiment in that
It conforms to G.

Upon receiving the input of the MPEG stream, the VTR 2 detects program information in the MPEG stream, starts recording the content in units of programs, and
The HDD 3 is notified by a command that the recording of the MPEG stream has started.

On the other hand, when the decoder 5 receives the input of the MPEG stream in parallel with the VTR 2, the decoder 5 performs decoding, which is the inverse conversion of the high-efficiency coding, to decode the AV data. Subsequently, the decoder 5 inputs the AV data to the HDD 3.

The HDD 3 is in a standby state, but upon receiving a command from the VTR 2 indicating that recording has been started, the HDD 3 enters a recording state from the standby state and the MPEG data recorded by the VTR 2 is recorded.
AV data corresponding to a decoded stream is recorded as sample AV data for a predetermined time. This predetermined time is set in the same manner as in the first embodiment.

The correspondence between the program (content) recorded on the recording tape accommodated in the VTR 2 and the sample AV data recorded on the HDD 3 and containing the data of the extracted program is independent. The information is recorded on the recording tape of the VTR 2 as sample correspondence information.

The subsequent recording operation is performed in the same manner as in a conventional AV data recording / reproducing apparatus. When recording is repeated on the same tape, an MPEG stream recording tape recording desired plural programs as contents is completed. That is, the digital bit stream recording / reproducing device 10
Means that the sample AV data, which is the content obtained by extracting a part of each of the plurality of programs included in the recording tape, is recorded on the HDD 3.

Next, the reproducing operation will be described. The digital bit stream recording / reproducing apparatus according to the second embodiment of the present invention has two types of reproduction modes, a normal reproduction mode and a program search mode, and the control unit 7 performs switching by a command from the command input terminal 9. However, the normal reproduction mode is performed in the same manner as in the first embodiment, and thus the description is omitted.

Next, the program search mode will be described. In the program search mode, the switch 4b is set to the multi-screen display unit 6
And the output terminal 7 are connected.

The HDD 3 searches the sample correspondence information recorded on the recording tape in the VTR 2 and
2 reproduces the sample AV data corresponding to the content contained in the recording tape stored in the recording tape 2 and outputs it to the multi-screen display unit 6. Subsequent operations are performed in the same manner as in the first embodiment.

As described above, according to the digital bit stream recording / reproducing apparatus of the second embodiment, the AV data obtained by decoding is recorded on the HDD, so that the bit streams of a plurality of programs can be simultaneously recorded. This eliminates the need for decoding and can output a moving image with a smooth motion without lowering the frame rate of each program.

Next, FIG. 6 shows a second example of a digital bit stream recording / reproducing apparatus according to Embodiment 2 of the present invention,
FIG. 3 is a diagram illustrating a configuration of a related device used by being connected thereto. As shown in the figure, the same reference numerals as those in FIG.
0 is VTR2, hard disk drive (HDD)
3, a multi-screen display unit 6 and a control unit 7
It is used by connecting to a set-top box (STB) 21 and a TV 33. In the STB 21, the tuner 21 is a means for selecting an arbitrary stream from an externally input MPEG stream. Also T
V32 is a means for receiving an input from an STB or a digital bit stream recording / reproducing device and outputting video / audio data.

The digital bit stream recording / reproducing apparatus 30 having the above-described configuration and the related equipment perform the same operation as the above-described digital bit stream recording / reproducing apparatus 20, but the decoder 5 is made independent of the recorder section. With the configuration included in the set-top box 5, it can be used by connecting to a set-top box such as a conventional CATV.

Note that the tuning of the tuner 21 may be performed by either the reservation setting by the control unit 7 or the setting of the user, and the tuner 21 itself may also serve as the control unit 7. (Embodiment 3) FIG. 7 is a diagram showing a configuration of a digital bit stream recording / reproducing apparatus according to Embodiment 3 of the present invention. As shown in the figure, in the digital bit stream recording / reproducing device 40, the same reference numerals as those in FIGS. 1 and 5 denote the same parts or the same means, and the sub-encoder 41
The sub-decoder 42 processes the signal input from the decoder 5 and outputs the signal to the HDD 3, and the sub-decoder 42 processes the signal input from the HDD 3 and outputs the signal to the multi-screen display unit 6.

Embodiment 1 having the above configuration
Will be described below. First, the control unit 7 controls the switch 4c so that the switch 4c connects the stream input terminal 1 to the decoder 5. Next, a digital bit stream obtained by highly efficient encoding of AV data including content such as a TV program is input to the VTR 2 and the decoder 5 via the bit stream input terminal 1. However, the high-efficiency coding in the second embodiment is based on MPEG, as in the first and second embodiments.

Upon receiving the input of the MPEG stream, the VTR 2 detects moving picture information in the MPEG stream, starts recording the content in units of programs, and
The HDD 3 is notified by a command that the recording of the MPEG stream has started.

On the other hand, when the decoder 5 receives the input of the MPEG stream in parallel with the VTR 2, the decoder 5 performs decoding, which is the inverse conversion of the high-efficiency coding, to decode the AV data. Subsequently, the decoder 5 sends the AV signal to the sub-encoder 41.
Enter the data.

Upon receiving the input of the AV data, the sub-encoder 41 performs a predetermined high-efficiency encoding on the AV data to generate a sub-digital bit stream. Subsequently, the sub-encoder 41 converts this sub-digital bit stream into HD
Input to D3.

The HDD 3 is in a standby state, but the VTR 2
Receives a command indicating that recording has been started from the standby state, enters the recording state from the standby state, and the MPE recorded by the VTR 2
A sub-digital bit stream corresponding to a decoded G stream is recorded as a sample stream for a predetermined time. This predetermined time is set in the same manner as in the first and second embodiments.

Next, the reproduction operation is basically performed in both the normal reproduction mode and the program search mode according to the second embodiment.
, But in the program search mode,
The signal recorded on the DD3 is subjected to high-efficiency encoding, and the bit stream is subjected to decoding reverse to predetermined high-efficiency encoding performed by the sub-encoder 41 by the sub-decoder 42 to obtain sample AV data. With multi-screen display section 6
Only in that the data is output to the second embodiment.

As described above, according to the digital bit stream recording / reproducing apparatus of the third embodiment, the data for sample display is compression-encoded and recorded, so that the data amount of the sample image and the recording The effect is that more programs can be secured.

In the third embodiment, the predetermined high-efficiency encoding performed by the sub-encoder 41 and the sub-decoder 42 is preferably MPEG1 in accordance with the HDD 3 as a recording medium, but is not limited thereto. Even if it does not have to be, any method may be used as long as it conforms to another high efficiency coding technique.

In each of the embodiments of the present invention,
Although the highly efficient encoded digital bit stream input from the digital bit stream input terminal 1 is an MPEG stream, it is particularly preferable that the digital bit stream conforms to MPEG2, but may be another MPEG standard.

Although not explicitly stated, the functions which can be realized in the first embodiment are the same as those in the second embodiment of the present invention.
As long as there is a portion having a common configuration also in the third and third embodiments, the second and third embodiments can naturally perform the same operation as the first embodiment.

The operation of all or each part of each embodiment of the present invention may be realized as an operation by hardware, or may be realized by an operation by software on a computer.

In the embodiments of the present invention, the digital bit stream recording / reproducing apparatus of the present invention has been mainly described. However, as a recording medium of the present invention, all or a part of the functions of each means described above, Alternatively, a recording medium that stores a program that causes a computer to execute all or a part of each step may be used.

[0060]

As is apparent from the above description, according to the present invention, highly convenient AV data recording / reproducing that allows the type and content of a program recorded on a recording tape to be immediately grasped and searched. An apparatus and a program recording medium can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a digital bit stream recording / playback device according to a first embodiment of the present invention.

FIG. 2 shows a recording tape and an HDD in the digital bit stream recording / reproducing apparatus according to the first embodiment of the present invention.
Diagram showing correspondence of recorded contents above

FIG. 3 is a diagram showing an example of a screen display in a program search mode of the digital bit stream recording / playback device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing another example of the screen display in the program search mode of the digital bit stream recording / playback apparatus according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a digital bit stream recording / reproducing device according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a second example of the digital bit stream recording / reproducing device according to the second embodiment of the present invention;

FIG. 7 is a diagram showing a configuration of a digital bit stream recording / reproducing device according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a digital AV data recording / reproducing apparatus according to a conventional technique.

[Explanation of symbols]

Reference Signs List 1 digital bit stream input terminal 2, 51 VTR 3 HDD 4a, 4b, 4c switch 5, 52 decoder 6 multi-screen display unit 7 control unit 8 AV data output terminal 9 command input terminal 10, 20, 30, 40 digital bit stream recording Playback device 11, 12 Screen 21 Tuner 31 Set-top box 32 Television 41 Sub-encoder 42 Sub-decoder 50 Digital AV data recording and playback device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C018 HA01 HA08 HA10 5C053 FA22 FA23 GB37 GB38 HA29 JA07 JA16 JA21 KA08 KA24 LA07

Claims (14)

[Claims] A first recording / reproducing means for recording / reproducing a digital bit stream obtained by encoding AV data with high efficiency in a predetermined file unit; detecting a sample of predetermined data from each of the predetermined files; The second recording / reproducing means for recording / reproducing this as a sample AV stream; a decoder for decoding a digital bit stream reproduced by the first and second recording / reproducing means to decode AV data; Sample A for simultaneously reproducing sample AV data, which is a signal obtained by decoding the sample AV stream, according to the number of all or a part of each program of the digital bit stream recorded by the first recording means
V data display processing means, wherein the first recording / reproducing means externally selects the sample AV data displayed by the sample AV data display processing means, thereby converting the digital bit stream into the selected sample AV data. A digital bit stream recording / reproducing apparatus, which reproduces a file to which data belongs. 2. A first recording / reproducing means for recording / reproducing a digital bit stream obtained by encoding AV data with high efficiency in a predetermined file unit; a decoder for decoding the digital bit stream to decode the AV data; A second recording / reproducing means for detecting a sample of predetermined data from each predetermined file of the AV data output by the decoder, and recording and reproducing the sample as sample AV data; A digital bit stream recording / reproducing apparatus comprising: sample AV data display processing means for simultaneously reproducing the digital bit stream recorded by the recording means in accordance with the number of all or a part of each program. Means for externally displaying the sample AV data displayed by the sample AV data display processing means; By selecting over data, digital bit stream, the digital bit stream recording and reproducing apparatus, characterized in that the playback file units belongs sample AV data the selected. 3. A first recording / reproducing means for recording / reproducing a digital bit stream obtained by encoding AV data with high efficiency in a predetermined file unit, and each predetermined AV data obtained by decoding the digital bit stream. A second recording / reproducing means for detecting a sample of predetermined data from the file and recording / reproducing the sample as sample AV data; and transmitting the sample AV data to each of the digital bit streams recorded by the first recording means. Sample AV data display processing means for simultaneously reproducing the program according to all or a part of the program, wherein the first recording / reproduction means externally outputs the sample AV data displayed by the sample AV data display processing means. By selecting, the digital bit stream belongs to the selected sample AV data. Digital bit stream recording and reproducing apparatus, characterized in that the play in file units. 4. A first recording / reproducing means for recording / reproducing a digital bit stream obtained by performing first high-efficiency encoding of AV data in a predetermined file unit, and a second recording / reproducing means for decoding the digital bit stream to decode the AV data. A predetermined data sample from each predetermined file of the AV data output from the decoder, and converts the detected data sample into a second high-efficiency code that is a lower-order encoding than the first high-efficiency encoding. An encoder for converting the sample AV stream into a sample AV stream; a second recording / reproducing unit for recording / reproducing the sample AV stream; a second decoder for decoding the sample AV stream into sample AV data; The AV data is stored in the digital bit stream recorded by the first recording means as a whole or in each program. Sample AV data display processing means for playing back simultaneously according to the number of copies, and wherein the first recording / playback means externally selects the sample AV data displayed by the sample AV data display processing means, A digital bit stream recording / reproducing apparatus for reproducing a digital bit stream in file units to which the selected sample AV data belongs. 5. When performing a recording operation, a digital bit stream recorded in the first recording / reproducing means is provided.
Sample AV recorded in the second recording / reproducing means
5. The apparatus according to claim 1, wherein correspondence information for providing correspondence with a stream or sample AV data is generated and stored in said first and / or second storage means.
The digital bit stream recording / reproducing device according to any one of the above. 6. The sample AV data display processing means, wherein the sample AV data is displayed on a single monitor at least two times.
The stream recording / reproducing apparatus according to any one of claims 1 to 5, wherein at least one of the streams is displayed. 7. The apparatus according to claim 1, wherein said sample AV data display processing means outputs an audio of the sample AV data selected by the outside from at least two displayed sample AV data. 6. The digital bit stream recording / reproducing apparatus according to any one of 5. 8. The sample AV data display processing means: selects sample AV data externally selected from at least two sample AV data being displayed,
6. The digital bit stream recording / reproducing apparatus according to claim 1, wherein the digital bit stream is displayed in a size different from that of other sample AV data. 9. The method according to claim 1, wherein the first recording / reproducing means uses a tape medium as a recording medium, and the second recording / reproducing means uses a disk medium as a recording medium. A stream recording / reproducing device according to any one of the above. 10. The digital bit stream recording / reproducing apparatus according to claim 1, wherein the high-efficiency encoding method of the digital bit stream conforms to MPEG. 11. The stream recording / reproducing apparatus according to claim 1, wherein the unit of the predetermined file is based on a broadcast program. 12. The digital bit stream recording / reproducing apparatus according to claim 1, wherein the predetermined file is determined based on a unit setting by a user of the apparatus. 13. The method of high-efficiency encoding of the digital bit stream is based on MPEG2, and the high-efficiency encoding by the encoder and the second decoder is based on MPEG1. 13. The digital bit stream recording / reproducing apparatus according to claim 3, wherein: 14. A program recording medium on which a program for causing a computer to execute all or a part of the digital bit stream recording / reproducing apparatus according to claim 1 or 13 is recorded.