JP2003224825A - Multimedia data video recording apparatus, and multimedia data video recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording method capable of easily segmenting only required part from recorded data in the case of recording multimedia data such as video data for a long time. <P>SOLUTION: When video recording is started by a video recording start instruction, a timer measures a video recording continuous time. When a prescribed time elapses from the start of video recording (step S1), the recording apparatus acquires data to be recorded by an encoder (step S2). Then the apparatus applies compression processing in compliance with the MPEG 2 system or the like to the acquired data (step S3). When data compression is finished, information of 'start' and 'end' corresponding to the compressed data is generated (step S4), and each generated information is recorded (step S5). After continuing video recording, when the video recording is finished on the basis of a video recording end instruction by a key switch (step S7), the data compression, the head and end information is generated and the resulting data are recorded at that point of time (step S8). <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 multimedia data recording device capable of recording digital data such as moving images and audio, and more particularly to a digital recording device for recording data using a hard disk device.

[0002]

2. Description of the Related Art In recent years, it has become possible to record and reproduce large-capacity data such as moving images and audio even with a personal computer. This is a technology that reduces the amount of data by compressing video and audio data, increases the capacity of the recording medium itself such as a hard disk or DVD, and speeds up the CPU of the personal computer to facilitate data compression processing and data playback processing. The reason for this is that it has become possible.

As described above, large-capacity multimedia data such as music and video is recorded in a storage medium such as a magnetic tape capable of storing a large amount of data, and is recorded in a disk medium such as a hard disk or a semiconductor memory such as a memory card. It is changing to record for a long time.

[0004]

However, since data recorded on a hard disk or the like is compressed and coded by the MPEG2 system or the like and is recorded, it is conventionally recorded on a recording medium such as a magnetic tape. In many cases, it is not a data format that can be reproduced or cut out at an arbitrary position, but a format data structure that can be restored only as a series of data strings including information recorded at the beginning and the end. Therefore, even if it was necessary to reproduce from the middle, it was necessary to prepare the entire data recorded for a long time, or it was necessary to reconstruct the data by taking an enormous amount of time just to cut out the necessary part. .

Further, conventionally, when recording a moving image on a recording medium such as a hard disk, when the hard disk is full of recording data, the recording is stopped instead of continuing recording by overwriting.

[0006] Therefore, the present invention provides a multimedia data device capable of easily recording only a necessary portion without reconstructing multimedia data such as video data. Further, the present invention provides a multimedia device capable of recording all video data desired to be recorded even when the recording capacity of the recording medium may be exceeded when recording the video data.

[0007]

In order to solve the above-mentioned problems, the present invention provides a recording means for recording multimedia data in a multimedia data recording apparatus capable of compression-encoding a digital moving image, audio or the like. And instructing means for instructing the recording means to start recording,
When recording is started based on the instruction from the instruction means, a timer for measuring the recording duration time, and when the recording is continued for a predetermined time based on the timer and the recording is not finished, A recording control means for compression-encoding the multimedia data for a predetermined time as one data, adding predetermined additional information to the compression-encoded data, and recording it in the recording means. , After recording multimedia data for a predetermined time,
The recording continuation time is measured again based on the timer. Further, in order to solve the above-mentioned problems, the present invention is such that, when recording is completed, the recording control unit compresses the remaining multimedia data that has not been compression-encoded, following the multimedia data for the predetermined time. The data is encoded, and predetermined additional information is added to the compression-encoded data and recorded.

In order to solve the above-mentioned problems, the present invention provides a multimedia data recording method for compressing and encoding a digital moving image or audio and recording the same in a recording means.
When instructed to start recording, the measurement is performed based on the instruction, and when the recording is continued for a predetermined time and the recording is not finished, the multimedia data for the predetermined time is compressed as one data. Encoding, adding predetermined additional information to this compression-encoded data and recording it in the recording means, and after recording the multimedia data for a predetermined time by the recording control means, again the recording continuation time based on the timer Is to measure.

Further, in order to solve the above-mentioned problems, the present invention compression-encodes the remaining multimedia data that has not been compression-encoded after the multimedia data for the predetermined time when recording is completed. The predetermined additional information is added to the compression-encoded data and recorded.

In order to solve the above-mentioned problems, the present invention provides a recording means for recording multimedia data and a recording means for recording the multimedia data in a multimedia data recording apparatus capable of compressing and encoding a digital moving image, sound or the like. ,
Selection means for selecting whether to endlessly record multimedia data without a time limit or to perform normal recording with a time limit; and, when endless recording is selected based on the selection means, is provided in the recording means. And a recording control means for recording in a dedicated area for endless recording and for recording in the normal recording area provided in the recording means when the normal recording is selected.

In order to solve the above-mentioned problems, the present invention provides a recording means for recording multimedia data in a multimedia data recording apparatus capable of compressing and encoding a digital moving image, audio or the like and recording the multimedia data. When there is no recordable empty area, it is equipped with a means for erasing the already recorded data to create an empty area and a selection means for switching the priority of the data to be erased according to the content of the data. is there.

In order to solve the above-mentioned problems, the present invention is characterized in that the selecting means is one of old recording date, one recorded on a specific day of the week, or one recorded at a specific time zone. It is possible to select

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (First embodiment)

FIG. 1 is a system configuration diagram of a multimedia data device showing a first embodiment of the present invention.

As shown in FIG. 1, the multimedia data recording apparatus according to the present embodiment includes a tuner 1 for receiving a television broadcast, and the encoder 2 encodes the video data received by the tuner 1 to MPEG2. The compressed video data is generated by compression-encoding with a method such as the above. The key switch 4 is an input unit for instructing the channel switching received by the tuner 1 and the start and end of recording, and is operated by the user. The timer 5 measures the recording start time, recording end time, and recording duration, and notifies the measured time to the CPU 1 at a predetermined rate. CPU6
Records on the HDD 3 by adding “starting portion” and “tailing portion” information, which will be described later, to the video data encoded based on the recording duration time.

The card controller 7 is a memory card 7
Is a control device for recording and reproducing data with respect to
The control for copying the data recorded in the HDD 3 to the memory card 8 is performed. 2 to 4 are for explaining the first embodiment of the present invention, and show a data structure of data recorded in a recording device such as a hard disk 3 provided in a multimedia device, and a recording processing flow. It is a thing.

FIGS. 1 and 2 are for explaining the data format of the first embodiment and this embodiment. The data structure when a moving picture, music, etc. is recorded as compression-encoded data. FIG. 2 shows the present embodiment, and FIG. 3 shows the prior art for comparison.

As shown in FIG. 3, data recorded by a compression coding method such as MPEG2 is divided into three parts, a head information section, a compression coding information section, and a tail information section. The information section stores, as initial information, information for encoding compressed information such as coded image size and bit rate information. The compressed information section stores actual reproduction data as one or more picture data. It is aggregate data such as forward predictive encoded data. The tail information part is a part including a sequence end code indicating the end of one video data.

A series of video data can be reproduced only when these three configurations are completed, and each part of the extracted data is meaningless data and is encoded,
It cannot be restored.

In the video data having such a series of data structures, the beginning information is recorded at the start of recording, the actual video data is recorded thereafter, and the tail information is recorded at the same time when the recording is completed. Therefore, when a long-time recording of, for example, 5 hours is conventionally performed, as shown in FIG. 3, compressed information for 5 hours is recorded from the recording portion of the beginning information to the recording portion of the tail information.

On the other hand, as shown in FIG. 2, in the data structure of the first embodiment, the entire data is finely divided in preparation for the case of long-time recording of, for example, 5 hours from the start of recording to the end of recording. Then, each of the divided data is recombined into a decomposable data structure including an "initial information part", a "compressed information part", and an "end information part".
In FIG. 2, specifically, when the recording duration time reaches 1 hour, the process of rearranging the data structure into a recoverable data structure is performed to create 5 divided data for 5 hours of video data, and the whole data is created. As one video file.

It is possible to easily extract data on an hourly basis by internally dividing long-time recording data for 5 hours into 1 hour * 5 data.

Even in the case of endless recording in which recording is continued endlessly without setting the end time of recording, the data is divided every predetermined time, so that the user can extract arbitrary video data later. It will be easier.

Next, the operation of the first embodiment will be described with reference to FIG.

As shown in FIG. 3, when recording is started by the recording disclosure instruction of the key switch 4, the timer 5 measures the recording duration time. When a certain time has elapsed from the start of recording (step S1), specifically, for example, 1
When the time has elapsed, the encoder 2 acquires the data for one hour before the data to be recorded (step S2). Then, the obtained data is compressed by the MPEG2 method or the like (step S3). When the data compression is completed, the information of the "starting part" and the "tailing part" corresponding to the compressed data is created (step S4), and each created information is recorded (step S5). If the recording is still continued thereafter (step S6), a series of processing is repeated. When the recording is to be ended based on the instruction to end the recording by the key switch 4 after the recording is continued (step S7),
At that time, the data compression and the head and tail information are created and recorded (step S8).

By such a recording process, even if video data is being recorded for a long time, it is possible to easily extract a part of the data.

For example, using a large-capacity hard disk device, an endless recording of an image of a certain broadcasting channel is made for a long time, and only a part of the program is extracted later,
When copying to a recording medium with a relatively small capacity such as a memory card and wanting to watch a part of the program on the go, the user can easily cut out a part of the video data and copy at a higher speed. That is the effect of use.

(Second Embodiment)

FIG. 5 is a conceptual diagram showing a multimedia data recording device according to the second embodiment of the present invention. First
The same components as those in the embodiment will be described using the same reference numerals.

The multimedia data recording device of this embodiment is assumed to be a small pocket type recording / reproducing device having a built-in television tuner, and the LCD 9 is a display device.
Watch TV broadcasts and watch recorded videos. H
The DD (hard disk) 3 records a television image or the like received by the multimedia data recording device. The memory card 8 is a semiconductor memory portable card that is stored in the memory card slot 10. In the present embodiment, mainly the HDD is used.
2 is used as a recording medium for copying the video data stored therein.

In the multimedia data recording device having such a configuration, in the present embodiment, the recording area of the HDD 2 is divided into two areas corresponding to the recording mode. That is, as shown in FIG. 6, the recording area 1 of the HDD 3
1 is divided into an endless area 12 and a normal recording area 13. The endless area 12 is an area that is recorded when a recording mode in which the recording time is set to unlimited is specified in the multimedia data recording device. When the endless mode is specified, the recording is not always completed. Record TV images. On the other hand, the normal recording area is an area that is recorded when a certain recording time is fixed, such as timer recording.

The sizes of the endless area 12 and the normal recording area 13 can be arbitrarily changed by the user (ratio of the recording area).

When changing, the user can use the area changing utility displayed on the LCD 2 to further increase the endless area 7, or conversely decrease the endless area 7.

When the user gives an instruction to change the allocation area in this way, all the data recorded in the HDD is once erased. Then, the area is arbitrarily changed by changing the ratio of the area divided by the partition after the erasure.

In this way, by dividing the recording area between the endless recording mode and the normal recording mode (timer recording, etc.), when erasing old data during endless recording, the data recorded in normal recording is deleted. It is possible to prevent the recorded data from being accidentally erased by the user. As described above, when data is recorded in the endless area 7 in the endless recording mode, since it is always recorded, the recordable area of the endless area 7 may run out of free space. At this time, in the past, old data was sequentially erased to record new data, but in the present embodiment, the user can further select the order of erasing. The selectable items are as follows.

(1) Erase in order from oldest recorded date and time (as before)

(2) Erase from recorded data on a specific day of the week

(3) A specific time (for example, 24: 00-00)
Files such as 7:00) are deleted preferentially.

By selecting any one of the three erasing modes, the user can keep the data that should not be erased as long as possible, even during endless recording. Becomes

Therefore, the recording data during the endless recording is divided in advance at a predetermined ratio (for example, every hour as shown in FIG. 1), and the recording date and time is recorded as the beginning information of each. Then, when the recording free area of the endless area 7 is exhausted, the recorded data is erased based on the erase mode selected by the user, and new data is recorded.

As described above, in this embodiment, even if video data is continuously recorded for a long time, it is possible to easily extract a part of the data. In addition, the user can select any one of the three erasing modes to save the data that should not be erased as long as possible even when the endless recording is performed. .

[0042]

[Effects of the Invention] Even when video data is continuously recorded for a long time, a part of the data can be easily extracted. Further, even when endless recording is performed, it is possible to store data that is not desired to be erased as long as possible.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a multimedia data recording device showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a data recording structure in a hard disk in the same embodiment.

FIG. 3 is a view showing a conventional data recording structure for comparison with the data recording structure of the same embodiment.

FIG. 4 is a flowchart showing a data recording method in the same embodiment.

FIG. 5 is a conceptual diagram showing a system configuration of a multimedia data recording device showing a second embodiment of the present invention.

FIG. 6 is a diagram showing a structure of a data recording area of the hard disk device in the embodiment.

[Explanation of symbols]

1 ... tuner, 2 ... encoder, 3 ... hard disk,
4 ... Key switch, 5 ... Timer, 6 ... CPU, 7 ... Card controller, 8 ... Memory card, 9 ... LCD, 10
…card slot.

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI Theme Coat (Reference) G11B 27/034 H04N 5/92 H H04N 5/76 5/91 Z 5/91 G11B 27/02 K (72 ) Inventor Koichi Ogi 1-3-3 Shinmachi, Ome-shi, Tokyo In-house Toshiba Digital Media Engineering Co., Ltd. (72) Inventor Takeshi Toyota 1-3-3 Shinmachi, Ome-shi, Tokyo Toshiba Digital Media Engineering Stock Company In-house F-term (Reference) 5C052 AA01 AB03 AB04 CC06 CC11 DD04 5C053 FA23 GB06 GB21 LA06 LA11 5D044 AB05 AB07 BC01 CC04 CC09 DE02 DE03 DE12 DE24 DE72 DE94 DE96 EF03 FG10 GK05 GK08 GK12 HL07 HL11 HL14 5D110 AA11 CA29 CA04 CA29 A04 A29 A29 A29 A29 A29 A29 AA21 A29 AA21 AA21 AA21 AA21 AA21 AA21 AA21 AA21 A29

Claims (7)

[Claims] 1. A multimedia data recording apparatus capable of compressing and encoding a moving picture, a sound, etc. for recording, and a recording means for recording multimedia data, and an instructing means for instructing the recording means to start recording. A timer that measures a predetermined time based on an instruction from the instruction means; and, if the predetermined time is reached based on the timer and recording is continued, the multimedia data for each predetermined time is set to 1 A multimedia data recording apparatus, comprising: a recording control unit that performs compression encoding as one data, adds predetermined additional information to the compression encoded data, and records the additional information in the recording unit. 2. The recording control means, when the recording by the timer does not reach a predetermined time while the recording is continued and the recording ends, the multimedia data recorded every the predetermined time is compression-encoded. 2. The multimedia data recording apparatus according to claim 1, wherein the remaining multimedia data which is not recorded is compression-encoded, and predetermined additional information is added to the compression-encoded data and recorded. 3. A multimedia data recording method for compressing and encoding a moving picture, a sound or the like and recording the same in a recording means,
When instructed to start recording, the measurement is performed based on the instruction, and when the recording is continued for a predetermined time and the recording is not finished, the multimedia data for the predetermined time is compressed as one data. Encode, add predetermined additional information to this compression-encoded data and record it in the recording means, record the multimedia data for a predetermined time by the recording control means, and then record again the recording duration time based on the timer. A method for recording multimedia data, which is characterized by measuring 4. When the recording is completed, the multimedia data for the predetermined time is compression-encoded for the remaining multimedia data which is not compression-encoded, and a predetermined addition is made to the compression-encoded data. The multimedia data recording method according to claim 3, wherein the information is additionally recorded. 5. A multimedia data recording apparatus capable of compressing and encoding moving pictures, sounds and the like for recording, and recording means for recording multimedia data, and endless recording of multimedia data on the recording means without time limitation. Alternatively, a selection unit for selecting whether to perform normal recording with a time limit, and when the endless recording is selected based on the selection unit, the endless recording dedicated area provided in the recording unit is recorded, and the normal recording is performed. A multimedia data recording apparatus comprising: a recording control unit that records in a normal recording area provided in the recording unit when recording is selected. 6. A multimedia data recording apparatus capable of compression-encoding and recording a moving image, a sound, etc., and a recording unit for recording multimedia data, and an empty area when the recording unit has no recordable empty area. A multimedia data recording apparatus comprising: means for erasing data that has already been recorded so as to create data; and selection means for switching the priority of the data to be erased according to the content of the data. 7. The selecting means is capable of selecting one of an old recording date, a specific day of the week, or a specific time period. The multimedia data recording device according to claim 6.