JP3887555B2 - Recording apparatus, recording method, and program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording apparatus , a recording method , and a program .
[0002]
[Prior art]
With the realization of digital broadcasting, services such as multi-channel broadcasting that provides many programs in the same broadcasting frequency band and data broadcasting that adds real-time information such as weather forecasts and traffic information to programs have been provided. .
[0003]
Many programs provided by the above-described digital broadcasting or the like may be recorded in a large-capacity memory such as a hard disk.
Some recording apparatuses having a large-capacity memory can record a program recorded in the large-capacity memory on a recording medium such as a DVD (Digital Versatile Disc) while reproducing the program.
[0004]
[Problems to be solved by the invention]
However, the recording apparatus as described above, when recording a program being played back on a recording medium, records the recording medium over the same time as the broadcast time (or playback time) of the program. In other words, the recording speed cannot be controlled when the program being reproduced is recorded on the recording medium. For this reason, if recording is started in the middle of program playback, the program is recorded even after the program playback ends, and for example, as shown in FIG. 5, it takes a long time to complete the program recording. There is.
[0005]
Accordingly, an object of the present invention is 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]
[Means for Solving the Problems]
To achieve the above object, first according to the aspect recording apparatus of the present invention includes storage means for storing data, and recording means for recording data to which the storage means is stored in a recording medium, the recording A speed control means for switching the recording speed of the recording means from a high speed to a normal speed after a predetermined high-speed recording time after the means starts recording data, To do.
[0007]
A recording apparatus according to a second aspect of the present invention includes a storage unit that stores data, a recording unit that records data stored in the storage unit on a recording medium, and a recording speed of the recording unit from a high speed. Speed control means for switching to normal speed, playback means for playing back the data stored in the storage means, and data recorded by the playback means among the data stored in the storage means Speed setting means for setting a recording speed when the means records at a high speed, the speed setting means at a time from when the reproducing means starts reproducing data until the high-speed recording time ends. Accordingly, the recording speed at which the recording means records the data being reproduced by the recording means at a high speed is set.
[0008]
Reproduction means for reproducing the data stored in the storage means, and data recorded by the reproduction means among the data stored in the storage means when the recording means records the data at a high speed. Speed setting means for setting a recording speed, and the speed setting means reproduces according to the time from when the reproducing means starts reproducing data until the high-speed recording time ends. The recording speed at which the recording means records the recorded data at a high speed may be set.
[0009]
The speed setting means records when the recording means records the data at a high speed so that the end of data reproduction by the reproducing means and the end of recording of the data by the recording means are substantially simultaneous. The speed may be set.
[0010]
A recording method according to a third aspect of the present invention includes a recording step of recording data stored in a memory on a recording medium, and a constant high speed set in advance after starting recording of data in the recording step. And a speed control step of switching the speed of recording performed in the recording process from a high speed to a normal speed after the recording time .
[0011]
A recording method according to a fourth aspect of the present invention includes a recording step of recording data stored in a 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. , A reproduction step for reproducing the data recorded in the recording step, and recording when the data reproduced in the reproduction step among the data recorded in the recording step is recorded at a high speed in the recording step A speed setting step for setting a speed, wherein the speed setting step reproduces data in the reproduction step according to a time from the start of data reproduction in the reproduction step to the end of the high-speed recording time. The recording speed when recording the recorded data at a high speed in the recording step is set.
According to a fifth aspect of the present invention, there is provided a program comprising: a storage means for storing data; a recording means for recording data stored in the storage means on a recording medium; and the recording means for recording data. After the start, after a predetermined high-speed recording time, it functions as a speed control means for switching the recording speed of the recording means from a high speed to a normal speed.
According to a sixth aspect of the present invention, there is provided a program comprising: a storage unit that stores data; a recording unit that records data stored in the storage unit on a recording medium; and a recording speed of the recording unit is increased. Speed control means for switching from speed to normal speed, reproduction means for reproducing the data stored in the storage means, and data reproduced by the reproduction means among the data stored in the storage means, A program for functioning as a speed setting means for setting a recording speed when the recording means records at a high speed, wherein the speed setting means performs high-speed recording after the reproducing means starts reproducing data. The recording speed at which the recording means records the data being reproduced by the reproducing means at a high speed is set according to the time until the time ends.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, a video recording / reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0013]
As shown in FIG. 1, a video recording / playback apparatus according to an embodiment of the present invention includes an operation unit 1, a channel decoder unit 2, a large capacity memory 3, a video recording / playback unit 4, a connector unit 5, And a control unit 6.
[0014]
The operation unit 1 includes a plurality of operation buttons and is operated by a user of the video recording / reproducing apparatus. The operation unit 1 outputs various signals for operating the video recording / reproducing apparatus to the control unit 6 in accordance with a user operation.
[0015]
As shown in FIG. 2A, the channel decoder unit 2 includes a demodulation / error correction unit 21 and a time stamp generation unit 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 performs demodulation processing and error correction processing such as 8PSK (8 Phase Shift Keying) on the selected digital broadcast data, and compresses the compressed video in MPEG2 (Moving Picture Experts Group phase 2) format or the like. Generate compressed data.
[0016]
The time stamp generation unit 22 extracts time-related data from the digital broadcast data that has been demodulated and error-corrected by the demodulation / error correction unit 21. The time stamp generating unit 22 generates time stamp data indicating the broadcast time of the video composing the program at every predetermined timing, and adds the time stamp data to the compressed video data.
[0017]
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 includes 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. The large-capacity memory 3 copies and stores compressed video data necessary for displaying video from the input storage memory space 3a to the output memory space 3b.
[0018]
The video recording / playback unit 4 records the compressed video data recorded in the input storage memory space 3 a of the large capacity memory 3 on a recording medium such as a DVD (Digital Versatile Disc). The video recording / playback unit 4 plays back the compressed video data recorded on the recording medium.
[0019]
The connector unit 5 includes a connector for connecting a cable or the like. The video display device 10 such as a television is connected to the video recording / reproducing device via a cable or the like connected to the connector unit 5.
[0020]
The control unit 6 is a microcomputer including a RAM (Random Access Memory), a ROM (Read Only Memory), a CPU (Central Processing Unit), and the like, and operates according to a program provided in advance. To control. Detailed operation of the control unit 6 will be described later.
[0021]
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.
[0022]
The user of the video recording apparatus operates the operation unit 1 according to a predetermined procedure, and selects a program to be recorded (specifically, a channel and a time zone). The control unit 6 of the video recording apparatus stores the program (channel, time zone, etc.) selected by the user in a RAM or the like. Thereby, a recording target program is set.
[0023]
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 / playback apparatus according to a program provided in advance, and the recording target program is as follows. Is recorded in the large-capacity memory 3.
[0024]
First, the control unit 6 controls the demodulation / error correction unit 21 of the channel decoder unit 2 to record a recording target program (set by the user) from among a plurality of digital broadcast data supplied via an antenna or the like. Channel) digital broadcast data.
[0025]
The demodulation / error correction unit 21 performs processing such as demodulation and error correction on the digital broadcast data of the recording target program selected according to the control of the control unit 6, and generates compressed video data compressed in the MPEG2 format or the like.
[0026]
The time stamp generation unit 22 of the channel decoder unit 2 extracts time-related data from the digital broadcast data subjected to demodulation processing and error correction processing by the demodulation / error correction unit 21.
[0027]
The time stamp generating unit 22 generates time stamp data indicating the broadcast time of the video composing the program at every predetermined timing, and adds the time stamp data to the compressed video data.
[0028]
The control unit 6 controls the large-capacity memory 3 and sequentially stores the video compression 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. Thereby, the recording target program selected by the user is recorded.
[0029]
Next, the operation when the user views the compressed video data recorded in the large-capacity memory 3 will be described.
[0030]
First, the user operates the operation unit 1 according to a predetermined procedure to select a program to be watched from the programs recorded in the large-capacity memory 3. Then, the user presses a predetermined operation button (playback button) provided in the operation unit 1 in order to play the selected program. As a result, the operation unit 1 outputs a reproduction signal instructing reproduction of the program selected by the user to the control unit 6.
[0031]
In response to the reproduction signal supplied from the operation unit 1, the control unit 6 reproduces the program to be reproduced recorded in the large-capacity memory 3 as follows according to a program provided in advance.
[0032]
First, the control unit 6 controls the large-capacity memory 3 and copies the compressed video data of the program to be reproduced recorded in the input storage memory space 3a to the output memory space 3b.
[0033]
Then, the control unit 6 decompresses the compressed video data copied to the output memory space 3 b and outputs the decompressed video data to the video display device 10 such as a television via the connector unit 5. Thereby, the video of the reproduction target program 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.
[0034]
Next, the operation for recording the program reproduced as described above on a recording medium such as a DVD in the middle of the program will be described.
[0035]
When recording a program being viewed on a recording medium in the middle of the program, the user sets the recording medium in the video recording / playback unit 4 and presses a predetermined operation button (recording start button) provided in the operation unit 1. As a result, the operation unit 1 outputs a recording start signal instructing the recording start of the program that the user is watching, that is, the program being reproduced, to the control unit 6.
[0036]
In response to the recording start signal supplied from the operation unit 1, the control unit 6 performs the video recording process shown in FIG. 3 in accordance with a program provided in advance, and records the program being played back on a recording medium such as a DVD. . As shown 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), thereby recording a program being played back. It ends substantially simultaneously with the end of playback.
[0037]
First, the control unit 6 obtains a time for ending high-speed recording (step S101). Specifically, the high-speed recording time is constant and set in advance in a 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 at which high-speed recording is started. And the control part 6 calculates | requires the high-speed recording end time by adding to the high-speed recording start time which calculated | required the preset high-speed recording time. The high-speed recording time includes a high-speed recording setup time.
[0038]
Next, the control unit 6 obtains a recording speed when performing high-speed recording (step S102). As described above, in order to match the end of program playback with the end of recording, data to be played back by the high-speed recording end time must be recorded on the recording medium within a predetermined high-speed recording time.
[0039]
As shown in FIG. 4, when the broadcast start time of the program being played 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 equation 1 is satisfied. Holds. The control unit 6 acquires the time stamp data recorded in the input storage memory space 3a of the large-capacity memory 3, obtains the broadcast start time (a) of the program being reproduced, and uses Equation 1 to record the recording speed (y) Ask for.
[0040]
[Expression 1]
y = (b + x−a) / x
a: Broadcast start time of recording target program b: High-speed recording start time x: High-speed recording time y: Recording speed at 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 acquires the compressed video data of the program being played from the input storage memory space 3a of the large capacity memory 3 in order from the top of the program. Then, the control unit 6 controls the video recording / playback unit 4 to record the acquired video compression data on the recording medium at the recording speed obtained in step S102. Thereby, the program being reproduced is recorded at a high speed from the beginning. Even during high-speed recording, the program being played is played at the normal speed.
[0042]
And the control part 6 calculates | requires the broadcast time of the image | video currently recorded from the time stamp data currently recorded on the input preservation | save memory space 3a of the large capacity memory 3 (step S104).
[0043]
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 S105). Thereby, the control part 6 discriminate | determines whether the preset high-speed recording time was complete | finished.
[0044]
When it is determined that the broadcast time does not coincide with 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.
[0045]
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 start normal recording of the program being reproduced by switching the recording speed to the normal speed (1 × speed) (step S106).
[0046]
Then, the control unit 6 determines whether or not the program being played has ended (step S107). Specifically, the control unit 6 determines whether or not the video compression data of the program being reproduced has been reproduced to the end.
[0047]
When it is determined that the program being played is not finished, that is, when it is determined that the video compression data of the program being played has not been played to the end (step S107; NO), the control unit 6 returns to step S107. .
[0048]
On the other hand, when it is determined that the program being played has ended, that is, when it is determined that the video compression data of the program being played has been played to the end (step S107; YES), the control unit 6 records the video recording / playback unit 4 The operation is stopped (step S108), and the video recording process is terminated.
[0049]
As described above, high-speed recording is performed until the broadcast time of the video being recorded matches the high-speed recording end time, and then recording is performed at normal speed, thereby substantially reproducing and recording the video compressed data. At 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.
[0050]
Note that playback may be performed while the compressed video data is recorded in the large-capacity memory 2, and recording on the recording medium may be performed in parallel. Also in this case, by performing the same video recording process as described above, it is possible to record the compressed video data on the recording medium in a shorter time than before.
[0051]
In the above embodiment, the absolute time, which is the broadcast time of the images constituting the program, is used. However, the same processing as described above can be performed using the time (relative time) based on the beginning (start) of the program. Can be executed.
[0052]
In the above-described embodiment, the case where the high-speed recording time is constant and the recording speed at the time of performing high-speed recording is changed according to the time at which high-speed recording starts is shown as an example. However, the recording speed when performing high-speed recording may be constant, and the high-speed recording time may be changed according to the time at which high-speed recording is started. For example, the recording speed for high-speed recording is set to the maximum possible value, high-speed recording is performed until the broadcast time of the recorded image matches the broadcast time of the reproduced image, and then the normal speed You may make it record by. Even in this case, since the reproduction and recording of the program can be ended substantially simultaneously, it is possible to record the compressed video data on the recording medium in a shorter time than before.
[0053]
The apparatus of the present invention can be applied to an apparatus that processes not only video but also audio and general data.
[0054]
The apparatus of the present invention does not need to use a dedicated apparatus, and can be realized by a normal 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 (FD, CD-ROM, DVD, etc.), distributed, installed, and executed on the OS. The device of the invention can be realized. The program and data may be stored in a disk device or the like of a server device on the Internet, and downloaded to a computer, for example, superimposed on a carrier wave.
【The invention's effect】
As is apparent from the above description, the data recording speed can be controlled by the present invention.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a video recording / reproducing apparatus according to an embodiment of the present invention.
2A is a configuration diagram of a channel decoder unit constituting the video recording / reproducing apparatus shown in FIG. 1, and FIG. 2B is a large-capacity memory constituting the video recording / reproducing apparatus shown in FIG. It is a block diagram of memory space.
FIG. 3 is a flowchart showing video recording processing performed by a control unit constituting the video recording / reproducing apparatus shown in FIG. 1;
4 is a diagram showing a relationship between video playback time and recording time, realized by the video recording / playback apparatus shown in FIG. 1; FIG.
FIG. 5 is a diagram illustrating a relationship between video playback time and recording time, which is realized by a conventional recording apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation part 2 Channel decoder part 3 Large capacity memory 3a Input storage memory space 3b Output memory space 4 Video recording / reproducing part 5 Connector part 6 Control part 10 Video display apparatus 21 Demodulation / error correction part 22 Time stamp generation part

Claims (8)

Storage means for storing data;
Recording means for recording data stored in the storage means on a recording medium;
A speed control means for switching the recording speed of the recording means from a high speed to a normal speed after a predetermined high-speed recording time since the recording means started recording data ;
A recording apparatus comprising:   Storage means for storing data;
  Recording means for recording the data stored in the storage means on a recording medium;
  Speed control means for switching the recording speed of the recording means from a high speed to a normal speed;
  Reproducing means for reproducing the data stored in the storage means;
  Speed setting means for setting a recording speed when the recording means records the data reproduced by the reproducing means among the data stored in the storage means at a high speed;
  The speed setting means records the data being reproduced by the reproducing means at a high speed according to the time from when the reproducing means starts reproducing the data until the high-speed recording time ends. Set the recording speed when
  A recording apparatus. Reproducing means for reproducing the data stored in the storage means;
A speed setting means for setting a recording speed when the recording means records the data reproduced by the reproducing means among the data stored in the storage means at a high speed;
The speed setting means records the data being reproduced by the reproducing means at a high speed according to the time from when the reproducing means starts reproducing data until the high-speed recording time ends. Set the recording speed when
The recording apparatus according to claim 1 . The speed setting means records when the recording means records the data at a high speed so that the end of data reproduction by the reproducing means and the end of recording of the data by the recording means are substantially simultaneous. 4. The recording apparatus according to claim 2 , wherein a speed is set. A recording step of recording data stored in the memory on a recording medium;
A speed control step of switching the recording speed performed in the recording step from a high speed to a normal speed after a predetermined high-speed recording time from the start of data recording in the recording step;
A recording method comprising: A recording step of recording data stored in the memory on a recording medium;
A speed control step of switching the recording speed performed in the recording step from a high speed to a normal speed;
A reproduction step of reproducing the data recorded in the recording step;
A speed setting step for setting a recording speed when recording the data reproduced in the reproduction step among the data recorded in the recording step at a high speed in the recording step;
In the speed setting step, the data being reproduced in the reproduction step is recorded at a high speed in the recording step according to the time from the start of data reproduction in the reproduction step to the end of the high-speed recording time. Set the recording speed when
  And a recording method.   Computer
  Storage means for storing data;
  Recording means for recording data stored in the storage means on a recording medium;
  A predetermined high-speed recording time after the recording means starts recording data A program for functioning as speed control means for switching the recording speed of the recording means from a high speed to a normal speed.   Computer
  Storage means for storing data;
  Recording means for recording data stored in the storage means on a recording medium;
  Speed control means for switching the recording speed of the recording means from a high speed to a normal speed;
  Reproducing means for reproducing the data stored in the storage means;
  A program for functioning as speed setting means for setting the recording speed when the recording means records the data reproduced by the reproducing means among the data stored in the storage means at a high speed. There,
  The speed setting means records the data being reproduced by the reproducing means at a high speed according to the time from when the reproducing means starts reproducing data until the high-speed recording time ends. Set the recording speed when
  A program characterized by that.

Images