JP2003134452A - Device and method for recording, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a recording speed. SOLUTION: A control part 6 reproduces video compressed data stored in a large-capacity memory 2 and outputs it to a video display device 10 via a connector part 5 to display video. The control part 6 controls a video recording and reproduction part 4 to record video compressed data to be reproduced that the large-capacity memory 3 stores on a recording medium. When the video compressed data begins to be recorded, the control part 6 sets a recording speed. The video compressed data are recorded initially at high speed for a certain time and then recorded at a normal speed. The control part 6 sets a recording speed for high-speed recording according to the time from the start of reproduction of the video compressed data till the end of a previously set high-speed recording time. Consequently, the control part 6 ends the reproduction and recording of the video compressed data substantially at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device and a recording method. The present invention also relates to a program for causing a computer to function as a recording device.

[0002]

2. Description of the Related Art Due to the realization of digital broadcasting, multi-channel broadcasting that provides many programs in the same broadcasting frequency band,
Services such as data broadcasting that adds real-time information such as weather forecasts and traffic information to programs have come to be provided.

Many programs provided by the above-mentioned digital broadcasting and the like may be recorded in a large capacity memory such as a hard disk. Further, among recording devices having a large-capacity memory, there is a recording device capable of recording a program recorded in the large-capacity memory on a recording medium such as a DVD (Digital Versatile Disc) while reproducing the program.

[0004]

However, the recording apparatus as described above, when recording the program being reproduced on the recording medium,
Recording on the recording medium takes the same time as the broadcast time (or playback time) of the program. In other words, the recording speed cannot be controlled when recording the program being reproduced on the recording medium. Therefore, if the recording is started during the reproduction of the program, the recording of the program is performed even after the reproduction of the program is finished, and as shown in FIG. 5, for example, it takes a long time to complete the recording of the program. There is.

Therefore, it is an object of the present invention to provide a recording apparatus capable of controlling the recording speed. Another object of the present invention is to provide a recording method and program for controlling the recording speed.

[0006]

In order to achieve the above object, a recording apparatus according to a first aspect of the present invention is a recording means for storing data, and a recording medium for storing the data stored in the storage means. And a speed control means for switching the recording speed of the recording means from a high speed to a normal speed.

The speed control means may switch the recording speed of the recording means from the high speed to the normal speed after a predetermined constant high-speed recording time after the recording means starts recording the data.

The reproducing means for reproducing the data stored in the storage means and the data reproduced by the reproducing means among the data stored in the storage means are recorded by the recording means at a high speed. And a speed setting means for setting a recording speed at the time of performing the reproduction, the speed setting means reproducing the data according to a time from when the reproducing means starts reproducing the data to when the high speed recording time ends. The recording speed at which the recording means records the data being reproduced by the recording means at a high speed may be set.

The speed setting means records the data at a high speed by the recording means so that the reproduction of the data by the reproducing means and the recording of the data by the recording means are ended substantially at the same time. The recording speed at that time may be set.

A recording method according to a second aspect of the present invention is
It is characterized by comprising a recording step of recording data stored in the memory on a recording medium, and a speed control step of switching the recording speed performed in the recording step from a high speed to a normal speed.

According to a third aspect of the present invention, there is provided a program, in which a computer stores storage data, recording means for storing data stored in the storage medium on a recording medium, and recording by the recording means. A speed control means for switching the speed from a high speed to a normal speed, and the function as a recording device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a video recording / reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

The video recording / reproducing apparatus according to the embodiment of the present invention, as shown in FIG. 1, has an operating section 1, a channel decoder section 2, a large capacity memory 3, and a video recording / reproducing section 4.
And a connector section 5 and a control section 6.

The operation unit 1 includes a plurality of operation buttons and the like,
It is operated by the user of the video recording / reproducing apparatus. Operation part 1
Outputs various signals for operating the video recording / reproducing apparatus to the control unit 6 according to the operation of the user.

As shown in FIG. 2A, the channel decoder section 2 is composed of a demodulation / error correction section 21 and a time stamp generation section 22. The demodulation / error correction unit 21 selects digital broadcast data of a predetermined channel supplied via an antenna or the like. Then, the demodulation / error correction unit 21 adds 8PSK to the selected digital broadcast data.
After performing demodulation processing such as (8 Phase Shift Keying) and error correction processing, MPEG2 (Moving Picture Experts Group)
Generates video compression data compressed in phase 2) format.

The time stamp generator 22 extracts time-related data from the digital broadcast data that has been demodulated and error corrected by the demodulator / error corrector 21. Then, the time stamp generation unit 22 generates time stamp data indicating the broadcast time of the video forming the program at predetermined timings and adds the time stamp data to the video compressed data.

The large capacity memory 3 is composed of a hard disk or the like. As shown in FIG. 2B, the memory space of the large capacity memory 3 is composed of an input storage memory space 3a and an output memory space 3b. The large capacity memory 3 stores the compressed video data and the time stamp data generated by the channel decoder unit 2 in the input storage memory space 3a. Further, the large-capacity memory 3 copies the video compressed data necessary for displaying the video from the input storage memory space 3a to the output memory space 3b and stores it.

The video recording / playback unit 4 records the video compressed data recorded in the input storage memory space 3a of the large capacity memory 3 on a recording medium such as a DVD (Digital Versatile Disc). The video recording / reproducing unit 4 also reproduces the compressed video data recorded on the recording medium.

The connector section 5 has a connector for connecting a cable or the like. Video display device 10 such as television
Is connected to the video recording / reproducing apparatus via a cable or the like connected to the connector section 5.

The control unit 6 is a RAM (Random Access Memo).
ry), ROM (Read Only Memory), and CPU (Ce
ntral processing unit) and the like, and controls the operation of the video recording / reproducing apparatus according to a program provided in advance. The detailed operation of the control unit 6 will be described later.

Next, the operation of the video recording / reproducing apparatus configured as described above will be described. First, the operation when the user of the video recording / playback apparatus records a desired program in the large capacity memory 3 will be described.

A user of the video recording apparatus operates the operation unit 1 in a predetermined procedure to select a program to be recorded (specifically, a channel and a time zone). Control unit 6 of video recording device
Is a program selected by the user (channel, time zone, etc.)
Is stored in RAM or the like. As a result, the recording target program is set.

When the broadcast start time of the recording target program set as described above is reached, the control unit 6 controls each unit of the video recording / reproducing apparatus according to a program provided in advance, and as shown below, The recording target program is recorded in the large capacity memory 3.

First, the control unit 6 controls the demodulation / error correction unit 21 of the channel decoder unit 2 to record the data set by the user from a plurality of digital broadcast data supplied via an antenna or the like. Select the digital broadcast data of the target program (channel).

The demodulation / error correction unit 21 performs processing such as demodulation and error correction on the digital broadcast data of the program to be recorded selected under the control of the control unit 6, and generates compressed video data in the MPEG2 format or the like. .

The time stamp generator 22 of the channel decoder 2 extracts time-related data from the digital broadcast data that has been demodulated and error-corrected by the demodulator / error corrector 21.

Then, the time stamp generating section 22 generates time stamp data indicating the broadcast time of the video forming the program at every predetermined timing and adds it to the video compressed data.

The control unit 6 controls the large-capacity memory 3 to sequentially store the above-mentioned compressed video data to which the time stamp data is added in the input storage memory space 3a. As described above, the compressed video data of the recording target program selected by the user is stored in the large capacity memory 3. As a result, the recording target program selected by the user is recorded.

Next, the operation when the user views the compressed video data recorded in the large capacity memory 3 will be described.

First, the user operates the operation unit 1 according to a predetermined procedure to select a program to watch from the programs recorded in the large capacity memory 3. Then, the user presses a predetermined operation button (playback button) included in the operation unit 1 to play back the selected program. As a result, the operation unit 1 outputs a reproduction signal for instructing the reproduction of the program selected by the user to the control unit 6.

The control unit 6 responds to the reproduction signal supplied from the operation unit 1, and according to a program or the like provided in advance,
As described below, the reproduction target program recorded in the large-capacity memory 3 is reproduced.

First, the control section 6 controls the large capacity memory 3 to copy the compressed video data of the program to be reproduced recorded in the input storage memory space 3a to the output memory space 3b.

Then, the control unit 6 controls the output memory space 3b.
The video compressed data copied to is expanded and output to the video display device 10 such as a television via the connector unit 5. As a result, the video of the program to be reproduced selected by the user is displayed on the video display device 10, and the user can freely watch the program regardless of the actual broadcast time.

Next, the operation of recording the program reproduced as described above on a recording medium such as a DVD in the middle of the program will be described.

When recording a program that is being viewed in the middle of a program on a recording medium, the user sets the recording medium in the video recording / reproducing section 4 and presses a predetermined operation button (recording start button) provided on the operation section 1. Press down. As a result, the operation unit 1 outputs to the control unit 6 a recording start signal instructing the recording start of the program that the user is watching, that is, the program being reproduced.

The control unit 6 responds to the recording start signal supplied from the operation unit 1 and performs the video recording process shown in FIG. 3 in accordance with a program provided in advance to display the program being reproduced.
Recording on a recording medium such as VD. As will be described below, the control unit 6 performs high-speed recording for a preset high-speed recording time, and then records at a normal speed (1 × speed) to record the program being reproduced. The reproduction ends substantially at the same time.

First, the control unit 6 obtains the time to end the high speed recording (step S101). Specifically, the high-speed recording time is constant and is preset in the program or the like. The control unit 6 acquires the time stamp data recorded in the input storage memory space 3a of the large-capacity memory 3 and obtains the broadcast time of the currently reproduced video, that is, the time to start high-speed recording. Then, the control unit 6 obtains the high-speed recording end time by adding the preset high-speed recording time to the obtained high-speed recording start time. In addition,
The high speed recording time includes a high speed recording setup time.

Next, the control unit 6 obtains the recording speed for high-speed recording (step S102). As mentioned above, in order to match the end of program playback with the end of recording,
Within the predetermined high-speed recording time, the data to be reproduced by the high-speed recording end time must be recorded on the recording medium.

As shown in FIG. 4, when the broadcast start time of the program being reproduced is a, the high-speed recording start time is b, the high-speed recording time is x, and the recording speed at the time of high-speed recording is y, the following formulas are given. The relationship of 1 is established. The control unit 6 uses the large capacity memory 3
The time stamp data recorded in the input storage memory space 3a of the
Is calculated, and the recording speed (y) is calculated using Equation 1.

[0040]

## EQU1 ## y = (b + x-a) / x a: Broadcast start time of the program to be recorded b: High-speed recording start time x: High-speed recording time y: Recording speed during high-speed recording

Thereafter, the control unit 6 starts high-speed recording of the program being reproduced at the recording speed (y) obtained in step S102 (step S103). Specifically, the control unit 6
From the input storage memory space 3a of the large-capacity memory 3, the compressed video data of the program being reproduced is acquired in order from the beginning of the program. Then, the control unit 6 controls the video recording / playback unit 4,
The acquired video compression data is recorded on the recording medium at the recording speed obtained in step S102. As a result, the program being reproduced is recorded at high speed from the beginning. Note that the program being reproduced is reproduced at the normal speed even during the high-speed recording.

Then, the control unit 6 obtains the broadcast time of the currently recorded video from the time stamp data recorded in the input storage memory space 3a of the large capacity memory 3 (step S104).

Subsequently, the control unit 6 determines whether or not the broadcast time obtained in step S104 matches the high speed recording end time obtained in step S101 (step S10).
5). As a result, the control unit 6 determines whether or not the preset high-speed recording time has ended.

When it is determined that the broadcast time does not match the high speed recording end time (step S105; NO), the control unit 6
Determines that the high-speed recording time has not ended, and returns to step S104.

On the other hand, when it is determined that the broadcast time coincides with the high-speed recording end time (step S105; YES), the control unit 6 determines that the high-speed recording time has ended. Then, the control unit 6 controls the video recording / reproducing unit 4 to switch the recording speed to the normal speed (1 × speed) to start normal recording of the program being reproduced (step S106).

Then, the control section 6 determines whether or not the program being reproduced has ended (step S107). Specifically, the control unit 6 determines whether or not the video compressed data of the program being reproduced has been reproduced to the end.

When it is judged that the program being reproduced is not finished, that is, when it is judged that the video compressed data of the program being reproduced is not reproduced to the end (step S107; N).
O), and the controller 6 returns to step S107.

On the other hand, when it is determined that the program being reproduced has ended, that is, when the video compressed data of the program being reproduced has been reproduced to the end (step S107; YES), the control unit 6 causes the video recording / reproducing unit. The recording operation of No. 4 is stopped (step S108), and the video recording process ends.

As described above, high-speed recording is performed until the broadcast time of the video being recorded coincides with the high-speed recording end time, and then the normal speed recording is performed to reproduce and record the compressed video data. And can be ended at substantially the same time. As a result, the compressed video data reproduced from the large-capacity memory 2 can be recorded on the recording medium in a shorter time than before.

It should be noted that the compressed video data may be recorded and recorded in the large-capacity memory 2 and may be recorded in the recording medium in parallel. Also in this case, by performing the same video recording process as described above, it is possible to record the video compressed data on the recording medium in a shorter time than the conventional case.

In the above embodiment, the absolute time of the broadcast time of the image forming the program is used, but the time (relative time) based on the beginning (beginning) of the program is also used. The processing of can be executed.

Further, in the above embodiment, the case where the high speed recording time is fixed and the recording speed at the time of high speed recording is changed according to the time when the high speed recording is started has been described as an example.
However, the recording speed at the time of high-speed recording may be fixed, and the high-speed recording time may be changed according to the time when high-speed recording is started. For example, set the recording speed for high-speed recording to the maximum possible value, perform high-speed recording until the broadcast time of the image being recorded matches the broadcast time of the image being played, and then use the normal speed. You may make it record by. Even in this case, the reproduction and recording of the program can be ended substantially at the same time, so that the compressed video data can be recorded in the recording medium in a shorter time than in the conventional case.

The apparatus of the present invention can be applied to an apparatus which processes not only video but also audio and general data.

Further, the apparatus of the present invention does not need to use a dedicated apparatus and can be realized by an ordinary computer. For example, a program and data for causing a computer to execute each of the processes described above are recorded on a recording medium (F
The device of the present invention can be realized by recording and distributing it on a D, CD-ROM, DVD, etc., installing it, and executing it on the OS. Further, the above program and data may be stored in a disk device or the like included in a server device on the Internet, and may be downloaded to a computer, for example, by being superimposed on a carrier wave.

As is apparent from the above description, the data recording speed can be controlled by the present invention.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a video recording / reproducing apparatus according to an embodiment of the present invention.

2 (a) is a block diagram of a channel decoder section which constitutes the video recording / reproducing apparatus shown in FIG. 1, and FIG.
FIG. 2 is a configuration diagram of a memory space included in a large capacity memory that constitutes the video recording / reproducing apparatus shown in FIG. 1.

3 is a flowchart showing a video recording process performed by a control unit that constitutes the video recording / reproducing apparatus shown in FIG.

4 is a diagram showing a relationship between video reproduction time and video recording time realized by the video recording / reproducing apparatus shown in FIG.

FIG. 5 is a diagram showing a relationship between video reproduction time and recording time, which is realized by a conventional recording device.

[Explanation of symbols]

1 Operation part 2 channel decoder 3 large capacity memory 3a Input save memory space 3b output memory space 4 Video recording / playback section 5 Connector part 6 control unit 10 Video display device 21 Demodulation / Error correction section 22 Timestamp generator

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Claims (6)

[Claims] 1. A storage unit for storing data, a recording unit for recording the data stored in the storage unit on a recording medium, and a speed control unit for switching the recording speed of the recording unit from a high speed to a normal speed. A recording device comprising: 2. The speed control means switches the recording speed of the recording means from a high speed to a normal speed after a fixed high speed recording time set in advance after the recording means starts recording data. The recording apparatus according to claim 1, wherein: 3. A reproducing means for reproducing the data stored in the storage means, and a high speed recording means for reproducing the data reproduced by the reproducing means among the data stored in the storage means. Further comprising a speed setting means for setting a recording speed at the time of recording, wherein the speed setting means, according to the time from the reproduction means starts the reproduction of data until the high-speed recording time ends, The recording apparatus according to claim 1 or 2, wherein a recording speed at which the recording means records the data reproduced by the reproducing means at a high speed is set. 4. The speed setting means causes the recording means to record the data at a high speed so that the reproduction of the data by the reproduction means and the end of the recording of the data by the recording means are substantially simultaneously performed. The recording apparatus according to claim 3, wherein a recording speed at the time of recording is set. 5. A recording step of recording data stored in a memory on a recording medium, and a speed control step of switching a recording speed performed in the recording step from a high speed to a normal speed. Recording method. 6. A storage means for storing data, a recording means for recording data stored in the storage means on a recording medium, and a speed for switching a recording speed of the recording means from a high speed to a normal speed. A program for functioning as a recording device, comprising: a control unit.