JP2003217268A - Recording and reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording and reproducing method which is used for a recording and reproducing device and can rapidly and easily delete digital signals consisting of at least one of the videos or sounds desired to be deleted in recording. <P>SOLUTION: When a dele instruction is detected in a step 30 in performing deletion during recording, a time assignment component is acquired in a step 302 and a recording pointer is moved to a position where the time assignment component is acquired in the step 302 and the recording of the set time assignment component from the last position of the recording is deleted from the recording medium by overwriting from the pointer position in the writing of the next time in a step 305. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for compressing / decompressing input information and recording / reproducing the information at a position indicated by a recording pointer in a recording area of a randomly accessible recording medium. The present invention relates to a recording / reproducing method for selectively erasing information.

[0002]

2. Description of the Related Art Conventionally, in a recording / reproducing method in a recording / reproducing apparatus, in order to perform an editing operation such as deletion, Japanese Patent Application Laid-Open No.
As described in Japanese Patent No. 535, a display display device displays a recorded content list, file information or a representative screen is displayed in a reduced scale for each file recorded in the list, and after selecting the corresponding file, It is known to perform a delete operation.

FIG. 4 is a diagram of operation function items used in such a conventional recording / reproducing method. Conventionally, the recorded contents are displayed as a list on a display unit in units of files. By selecting the recording files displayed as a list on this display device and executing the function menu, the reproducing operation and the editing operation are executed. In the case of deleting the recorded contents in the figure, the deletion operation is carried out by selecting data from the recorded contents list 401, displaying the edit item of the file by the function item display 403, and selecting the temporary discard 405.

[0004]

However, in the above-mentioned conventional recording / reproducing method, when the user deletes the recorded contents recorded on the recording medium at the time of recording, the recording file is displayed on the display device after the recording is stopped. Since a complicated procedure of selecting the relevant file after selecting the list and selecting the delete operation from the function items is required and it takes time, it is not possible for the user to delete it quickly in case of shooting failure. There is a problem.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a recording / reproducing method capable of quickly and easily deleting input information consisting of at least one of video and audio during recording. To do.

[0006]

According to a first aspect of the present invention, there is provided a recording / reproducing method in which input information is compressed / expanded and recorded and reproduced at a position indicated by a recording pointer in a recording area of a randomly accessible recording medium. In the recording / reproducing apparatus, when selectively erasing the recorded input information, a erasing time designated amount is set, and the pointer is moved to the recording of the set time designated amount from the last position of the recording. However, it is characterized in that the recording for the set time designation from the last position of the recording is deleted from the recording medium by overwriting at the next writing.

The recording / reproducing method according to claim 2 of the present invention is
In a recording / reproducing apparatus that compresses / expands input information and records and reproduces at a position indicated by a recording pointer in a recording area of a recording medium that is randomly accessible, when selectively erasing recorded input information during recording, When an erasing instruction is detected, the pointer is moved to a preset record for a designated time and recording is continued to overwrite to delete the record for a designated time immediately before the erasing instruction is detected from the recording medium. Characterize.

A recording / reproducing method according to a third aspect of the present invention comprises:
In Claim 1 or Claim 2, the input information comprises at least one of video and audio.

According to a fourth aspect of the present invention, there is provided a recording / reproducing method,
In any one of Claims 1 to 3, when the compression / expansion is carried out according to the MPEG (Moving Picture Expert Group) standard, the designated time is 1 GOP (Group Of Pic).
tures) is an integral multiple of the unit.

A recording / reproducing apparatus according to a fifth aspect of the present invention is
An input operated when selectively erasing recorded input information in a recording / reproducing apparatus that compresses / expands input information, and records and reproduces the information at a position indicated by a recording pointer in a recording area of a randomly accessible recording medium. Means and claim 1
The control means for controlling the position of the recording pointer is provided so as to realize any one of the recording and reproducing methods described in claim 4.

The recording / reproducing apparatus according to claim 6 of the present invention is
According to a fifth aspect of the present invention, there is provided a deletion time setting means by which a user can set a preset time designated amount.

A recording / reproducing apparatus according to a seventh aspect of the present invention is
In claim 6, the deletion time setting means can set the deletion time to an integral multiple of 1 GOP.

The recording / reproducing apparatus according to claim 8 of the present invention is
In any one of claims 5 to 7, the recording medium is any one of a magnetic disk, a magneto-optical disk, an optical disk, and a semiconductor memory.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The recording / reproducing method of the present invention will be described below based on specific embodiments. FIG. 1 shows a recording / reproducing apparatus for executing the recording / reproducing method of the present invention, and FIG. 2 is an explanatory diagram of a compressed data structure to be recorded on a recording medium. Further, FIG. 3 is a flowchart of the operation at the time of deleting the recorded contents.

In FIG. 1, the input / output device 101 is a CC
D, a microphone, a speaker, and a line input / output terminal and an input / output processing circuit, and performs at least one input / output processing of a video signal or an audio signal.

The A / D / D / A conversion unit 102 performs at least one A / D conversion of input video or audio, and at least one D / D of output video or audio.
Perform A conversion.

The display / display device 104 displays an input video signal during recording and displays an output video signal during reproduction. Furthermore, OS such as date and time, menu display, etc.
D display is also performed.

The digital signal compression / expansion unit 103 compresses and expands the digital video / audio signal. The compression / decompression method is performed using MPEG2. The CPU 105 controls the entire system such as initialization and control of each device and data transfer, and the memory 106 is required for data transfer and program execution by the CPU 105.
It is composed of M and ROM.

The recording medium 107 is, for example, a hard disk and stores the digital signal compressed by the digital signal compression / expansion unit 103. The operation unit 108 is composed of an input / output device such as a plurality of buttons and switches. In addition to the simple delete button which is the characteristic feature of the present embodiment, recording, reproduction, stop, menu display, power ON / OF are performed.
Functions such as F are assigned. This operation means 108
The user's input operation from is notified to the CPU 105, and each assigned function is executed.

The deletion time setting means 109 sets the deletion time unit when the recorded contents are simply deleted. First, the basic operation of recording / reproducing will be described.

At the time of recording, a signal consisting of at least one of video and audio input by the input / output device 101 is subjected to input processing, and then the A / D / D / A conversion unit 102 at the subsequent stage.
Sent to. The A / D / D / A conversion unit 102 performs A / D conversion on each signal and sends the digital data to the digital signal compression / expansion unit 103. Each digital data of video and audio is compressed by the digital signal compression / expansion unit 103, and PS (Program Stream) is output. CPU1
Reference numeral 05 transfers the output data to the recording medium 107 for recording.

At the time of reproduction, the digital signal recorded on the recording medium 107 is read out and transferred to the digital signal compression / expansion unit 103 for expansion processing. The decompressed video / audio data is sent to the A / D / D / A conversion unit 102 and converted into analog signals. Each signal is input / output device 10
1 and the display device 104.

Next, the data format recorded on the recording medium 107 will be described with reference to FIG. PS20
1 is composed of two types of packs, a video pack 202 and an audio pack 203. In the embodiment of the present invention, data is generated so that one pack has 2048 bytes. Each pack is composed of a pack header 204 and a video packet 206 or audio packet 209, and each packet is composed of a packet header 207 and video data 208 or audio data 210. Further, in the embodiment of the present invention, compressed data for 1 GOP is stored in a plurality of packs. Therefore, the video pack includes the pack including the beginning of the GOP (see FIG. 2).
There is a pack that does not include (b)) (FIG. 2C).
The system header 205 is included in the pack including the head of the GOP.
Is attached. Here, GOP is an encoding unit composed of a plurality of pictures in the MPEG2 standard, and GOP
By editing in OP units, the correctness of the data is maintained and it becomes possible to reproduce even after the editing.

The CPU 105 drives the basic operation of recording and reproducing as described above, and when it is detected that the simple delete button of the operating means 108 is operated during recording, the CPU 105 operates as shown in FIG. ing.

When recording is being performed, the input video / audio is compressed by the digital signal compression / expansion unit 103, and the generated PS is written in the recording medium 107 by the CPU 105. At this time, the write destination address of the data to be written is indicated by the recording pointer and is incremented in accordance with the data transfer to indicate the next write destination address. Here, the head address of the video pack including the head of the GOP written last in the recording medium is also held.

During recording, the user presses the simple delete button of the operating means 108, and the CPU 105
Is recognized, recording is continued after the routine shown in FIG. 3 is executed.

When the CPU 105 detects that the simple delete button has been operated in step 301, it confirms in step 302 whether the delete time setting means 109 is valid or invalid. When it is determined in step 302 that the setting of the deletion time setting means 109 is invalid, the deletion operation is performed for one GOP time unit. That is, the recording pointer of the recording medium is set to the head pointer of the GOP, the routine of FIG. 3 is exited, recording is continued from the head pointer of the GOP, and the recorded content for one GOP time unit is erased by overwriting. At this time, the compressed data temporarily stored in the memory 106 is also erased. After the deletion operation is completed, the newly generated compressed data is continuously written at the address indicated by the recording pointer.

If it is determined in step 302 that the setting of the deletion time setting means 109 is valid, the CPU
105 acquires the set value n (where n is an integer) previously stored in the memory 106 in step 304, and executes step 305.

In step 305, n in GOP time unit
Double erase operation. That is, the address of the video pack including the beginning of the (n-1) th previous GOP is calculated from the address of the video pack including the beginning of the GOP recorded last in the recording medium 107, and the recording pointer is set to set the address. Then, the recording is continued from the head pointer of the (n-1) th previous GOP, and the recorded contents for n GOP time units are erased by overwriting. In this case as well,
The compressed data temporarily stored in the memory 106 is also erased.

Here, the deletion time setting means 109 can select whether to set the deletion time from the display menu, and the user can set the set value n from the menu. The set value n set by the user is the memory 1
It is stored in 06 and is used during the simple deletion operation. Here, one GOP time unit is about 0.5 seconds, and when nGOP is erased, about 0.5 × n seconds are deleted.

As described above, according to the recording / reproducing method of the present invention, it is possible to quickly and easily delete a digital signal including at least one of video and audio which is desired to be deleted during recording. Although a hard disk is used as the recording medium 107 in the above embodiment, other magnetic disks, magneto-optical disks, optical disks and semiconductor memories may be used.

In the above embodiment, the PS having the pack length of 2048 Byte was used for the compressed data to be recorded.
Compressed data with different pack lengths, PS of different configurations or other configurations may be used.

In the above embodiment, the line input / output terminal, CCD, microphone, speaker, and display device are used as the input / output device, but the input / output device is configured by using other equipment such as a tuner. Good.

In the above embodiment, the case where the user operates the simple delete button of the operating means 108 during recording has been described as an example. However, recording is stopped or temporarily stopped (all or part of the recording system). When the user operates the simple delete button of the operating means 108, the routine shown in FIG.
It is possible to improve the operability as compared with the prior art by changing the recording pointer to the corresponding position and configuring to overwrite and erase when the recording is restarted next time. In this case, specifically, in the recording / reproducing apparatus that compresses / expands the input information, and records and reproduces the information at a position indicated by the recording pointer of the recording area of the randomly accessible recording medium, the recorded input information is recorded. When selectively erasing, set the designated time for erasing,
The pointer is moved to the record for the set time designation from the last position of the record, and the pointer is overwritten at the next writing, and the record for the set time designation from the last position of the record is recorded. Configure to delete from media.

[0035]

As described above, the recording / reproducing method of the present invention is
In a recording / reproducing apparatus that compresses / expands input information and records and reproduces the information at a position indicated by a recording pointer in a recording area of a recording medium that can be randomly accessed, when erasing the recorded input information selectively, Set a designated time, move the pointer to the designated recording from the last position of the recording, and overwrite it at the time of the next writing to set the time from the last position of the recording. Since the designated amount of recording is deleted from the recording medium, simple erasing from the last position of the recording of the recording medium can be performed quickly and easily while the recording is stopped or temporarily stopped, and the operability of the related art can be improved. Can be improved compared to.

Further, according to the recording / reproducing method of the present invention, in the recording / reproducing apparatus which compresses / expands the input information and records and reproduces the information at the position indicated by the recording pointer of the recording area of the randomly accessible recording medium, during recording. When an erasing instruction is detected when selectively erasing the recorded input information, the time immediately before the erasing instruction is detected by moving the pointer to record for a preset time designation and continuing shooting and overwriting Since the specified amount of recording is deleted from the recording medium, simple erasing from the last position of the recording of the recording medium during recording can be performed quickly and easily, and the display file list is displayed on the display device. In addition, it is possible to delete the file quickly and easily without performing the operation of selecting the corresponding file, and the operability can be improved as compared with the conventional method.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a recording / reproducing apparatus that executes a recording / reproducing method of the present invention.

FIG. 2 is an explanatory diagram of a compressed data structure according to the MPEG2 standard of the same embodiment.

FIG. 3 is a flowchart of a simple deletion operation of the main part of the embodiment.

FIG. 4 is an explanatory diagram of a conventional recording / reproducing method.

[Explanation of symbols]

101 I / O device 102 A / D / D / A converter 103 Digital signal compression / decompression unit 104 display device 105 CPU (control means) 106 memory 107 recording medium 108 Operation means 109 Deletion time setting means 201 Program Stream 202 video packs 203 Audio Pack 204 pack header 205 system header 206 video packets 207 packet header 208 video data 209 audio packets 210 audio data

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 27/00 H04N 5/85 Z H04N 5/765 G11B 27/02 K 5/781 H04N 5/781 520D 5 / 85 5/91 N 5/91 (72) Inventor, Koichi Kameyama, 1-8, Koshinmachi, Takamatsu-shi, Kagawa Matsushita Judenko Industrial Co., Ltd. (72) Inventor, Takami Uemura, Matsushita, 1-8, Komatsucho, Kagawa Judenko Kogyo Co., Ltd. (72) Inventor Yoichi Kondo 1-8, Koshin-cho, Takamatsu-shi, Kagawa Matsushita Judenko Kogyo Co., Ltd. (72) Inventor Yoh Hida 1-8, Koshin-cho, Takamatsu-shi, Kagawa F-term within Electronics Industry Co., Ltd. (reference) 5C052 AA01 AA02 AA03 AA04 AA17 AB05 CC11 DD02 GA01 GA03 GA06 GB06 GB07 5C053 FA14 FA23 FA24 FA25 FA27 GA11 GB06 GB11 GB21 GB37 HA30 LA02 5D044 AB05 A B07 BC01 BC06 CC04 DE37 DE45 EF01 GK08 GK12 HL11 5D090 AA01 BB04 BB10 CC01 CC02 CC14 DD03 DD05 FF26 HH01 5D110 AA13 AA17 AA19 AA27 AA29 CA24 CC02 CD02 DA06 DA12 DA13 EB08

Claims (8)

[Claims] 1. A recording / reproducing apparatus for compressing / decompressing input information and recording / reproducing the information at a position indicated by a recording pointer in a recording area of a randomly accessible recording medium to selectively erase the recorded input information. In doing so, set the specified time for erasing, move the pointer from the last position of recording to the record for the specified specified time, and overwrite it at the next writing to overwrite from the last position of the recording. A recording / reproducing method for deleting the recording for the set time designation from the recording medium. 2. A recording / reproducing apparatus for compressing / decompressing input information and recording / reproducing the information at a position indicated by a recording pointer of a recording area of a randomly accessible recording medium so that the input information already recorded during recording is selectively selected. When an erasing instruction is detected during erasing, the pointer is moved to a preset record for a designated time, recording is continued and overwritten, and the record for the designated time immediately before the erase instruction is detected is recorded on the recording medium. Recording and playback method to delete from. 3. The recording / reproducing method according to claim 1, wherein the input information comprises at least one of video and audio. 4. The compression / expansion is performed by MPEG (Moving Picture).
The recording / reproducing method according to any one of claims 1 to 3, wherein the specified time is an integral multiple of 1 GOP (Group Of Pictures) unit, when it is carried out according to the Expert Group) standard. 5. A recording / reproducing apparatus for compressing / expanding input information, recording and reproducing the information at a position indicated by a recording pointer in a recording area of a recording medium capable of random access, and selectively erasing recorded input information. A recording / reproducing apparatus provided with an input unit that is operated at any time, and a control unit that controls the position of a recording pointer so as to realize the recording / reproducing method according to any one of claims 1 to 4. 6. The recording / reproducing apparatus according to claim 5, further comprising a deletion time setting means by which a user can set a preset time designated amount. 7. The deletion time setting means is capable of setting the deletion time to an integral multiple of 1 GOP.
The recording / reproducing apparatus described. 8. The recording / reproducing apparatus according to claim 5, wherein the recording medium is any one of a magnetic disk, a magneto-optical disk, an optical disk and a semiconductor memory.