JP2004158127A - Apparatus and method for recording and reproducing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the operation for selecting contents to be compressed is complicated in a conventional recording and reproducing apparatus when compressing a plurality of the recorded contents. <P>SOLUTION: This recording and reproducing apparatus is provided with a content recording means for recording the plurality of the contents inputted from the outside on a recording medium with identification information so as to identify them for each content; a group reference setting means for setting a group reference for grouping the plurality of the contents recorded on the recording medium into prescribed groups; a grouping means which sorts and groups the plurality of the contents recorded on the recording medium based on the identification information into the respective prescribed groups according to the set group reference; and a compressing means for compressing the plurality of the contents recorded in the recording medium by each grouped group. The plurality of the contents compressed by each group are recorded on the recording medium. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording / reproducing apparatus for recording content on a recording medium.
[0002]
[Prior art]
In a conventional technology for recording content on a recording medium, when the remaining amount of the recording medium is insufficient during recording, recorded data is combined, re-encoded at a different compression rate, and re-recorded (for example, see Patent Document 1). 1).
[0003]
In addition, the conventional technology of recording content on a recording medium prevents underflow / overflow by optimizing image compression in GOP units composed of one picture of an image signal (for example, see Patent Document 1). 2).
[0004]
Further, in the conventional technique of recording content on a recording medium, the recorded content is read and decompressed, and then recompressed at a higher compression rate and rerecorded (for example, Patent Document 3).
[0005]
[Patent Document 1]
JP-A-10-257422 (pages 3-5, FIGS. 1, 2, and 3)
[Patent Document 2]
JP 2001-148858 A (pages 16-20, FIG. 1)
[Patent Document 3]
JP-A-10-243344 (page 3-8, FIGS. 1, 2, and 3)
[0006]
[Problems to be solved by the invention]
The techniques of Patent Document 1, Patent Document 2, and Patent Document 3 cannot solve the problem that the operation of selecting the content to be compressed is complicated when compressing the recorded content.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to improve a content selection operation when compressing recorded content.
[0008]
[Means for Solving the Problems]
A recording / reproducing apparatus according to the present invention comprises: content recording means for recording, on a recording medium, identification information together with identification information so that content input from the outside can be identified for each content; and grouping the content recorded on the recording medium into a predetermined group. Grouping standard setting means for setting a grouping standard for grouping, and classifying the contents recorded on a recording medium into predetermined groups based on the identification information according to the set grouping standard. Grouping means for compressing the plurality of contents recorded on a recording medium for each of the grouped groups, and a recording medium for compressing the plurality of contents for each group. Is recorded.
[0009]
The recording / reproducing method according to the present invention may further include a step of recording a plurality of contents input from the outside together with identification information so that the contents can be identified for each content, and a step of recording the plurality of contents recorded on the recording medium into a predetermined group. Setting a grouping criterion for grouping, and, according to the set grouping criterion, classifying and grouping the plurality of recorded contents into predetermined groups based on the identification information. And compressing the plurality of contents for each of the grouped groups.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 is a block diagram illustrating an embodiment according to the present invention.
[0012]
Reference numeral 1 denotes a recording medium (DVD disk or HDD disk), reference numeral 2 denotes a pickup for writing data to the recording medium 1 and reading of data from the recording medium 1, and reference numeral 3 denotes a disk motor for driving the recording medium 1. .
[0013]
Reference numeral 4 denotes a reproduction amplifier, reference numeral 5 denotes a recording amplifier, reference numeral 7 denotes a memory buffer (cache memory), reference numeral 8 denotes a servo processor, reference numeral 9 denotes an MPEG2 decoder (expansion means) for expanding MPEG2 compressed data, and reference numeral 10 denotes a system. , A reference numeral 11 denotes an MPEG2 encoder (compression means) for compressing the data by MPEG2.
[0014]
Reference numeral 41 denotes a graphic display, reference numeral 12 denotes a video DAC which is a D / A converter for converting digital data (digital signal) into analog data (analog signal), reference numeral 13 denotes a video external output unit for outputting video to the outside, and reference numeral A display device (TV) 30 displays the output video signal (content).
[0015]
Reference numeral 16 denotes a video external input unit for inputting a video from outside, reference numeral 15 denotes a video input selector for selecting a video input from the outside, and reference numeral 14 denotes a video A / D converter which is an A / D converter for converting an analog signal into a digital signal. D.
[0016]
Reference numeral 19 denotes an antenna for receiving a broadcast, reference numeral 18 denotes a tuner for selecting a received broadcast, and reference numeral 17 denotes a broadcast station information decoder for decoding broadcast station information from the selected broadcast.
[0017]
Reference numeral 22 denotes an audio input unit for inputting audio, reference numeral 21 denotes an audio input selector for selecting the input audio, and reference numeral 20 denotes an audio A / D which is an A / D converter for converting an analog signal into a digital signal.
[0018]
Reference numeral 23 denotes an audio DAC which is a D / A converter for converting digital data (digital signal) into analog data (analog signal), and reference numeral 24 denotes an external audio output unit for outputting audio to the outside. These are controlled by the system controller 10.
[0019]
Reference numeral 31 denotes a program information input unit. The program information is called EPG (Electrical Program Guide), and is information on a broadcast program such as a broadcast time, a broadcast station, and program contents. These pieces of program information are currently available through the Internet. For example, program information may be obtained through the Internet.
[0020]
The broadcast received by the antenna 19 is transmitted to the tuner 18 and a desired broadcast station is selected (tuned). The video signal (content) of the broadcasting station selected by the tuner 18 is transmitted to the video input selector 15, and the audio signal is transmitted to the audio input selector 21. Further, a video signal (content) transmitted from an external device (not shown) provided outside the recording / reproducing device 50 and input from the video external input unit 16 is also transmitted to the video input selector 15. Further, an audio signal (content) transmitted from an external device (not shown) of the recording / reproducing device 50 and input from the audio input unit 22 is also transmitted to the audio input selector 21.
[0021]
The video input selector 15 selects a video signal (content) transmitted from the tuner 18 and a video signal (content) input from the video external input unit 16 in accordance with a user's instruction, and selects the selected video signal (analog signal). Is transmitted to the video A / D 14.
[0022]
In the video A / D 14, a process of converting an analog signal into a digital signal is performed, and a video signal (content) converted into a digital signal is output.
[0023]
The audio input selector 21 selects an audio signal transmitted from the tuner 18 and an audio signal input from the audio input unit 22 according to a user's instruction, and sends the selected audio signal (analog signal) to the audio A / D 20. Sent.
[0024]
In the audio A / D 20, a process of converting an analog signal into a digital signal is performed, and an audio signal converted into a digital signal is output.
[0025]
At this time, the plurality of input contents (video signal and audio signal) are output together with identification information so that each content can be identified (described later).
[0026]
Hereinafter, unless otherwise specified, video signals and audio signals input from the outside are collectively referred to as contents. Note that the audio signal is subjected to compression processing such as AC3 or PCM, but in the following description, the description will be omitted using MPEG2 for compressing the content.
[0027]
The plurality of contents output from the video A / D 14 together with the identification information are input to the MPEG2 encoder 11, subjected to a first compression (compression rate: K0) relating to MPEG2, and output MPEG2 compressed data.
[0028]
The MPEG compressed data output from the MPEG2 encoder 11 is stored in a recording / playback memory buffer 7 which is a cache memory composed of a semiconductor memory or the like. The MPEG compressed data stored in the recording / reproduction memory buffer 7 is transmitted to the data processor 6.
[0029]
The data processor 6 converts the MPEG compressed data transmitted from the recording / reproducing memory buffer 7 into a format (DVD or HDD format) compatible with the recording medium 1 and outputs it. The MPEG compressed data that has been converted into a format compatible with the recording medium 1 (hereinafter, the format of the recording medium) and output is transmitted to the recording amplifier 5.
[0030]
The recording amplifier 5 converts the MPEG compressed data converted into the format of the recording medium into a recording signal for the recording medium 1 and outputs the signal.
[0031]
The MPEG compressed data converted into a recording signal for the recording medium 1 output from the recording amplifier 5 is input to the pickup 2.
[0032]
The pickup 2 is controlled by the servo processor 8 and converts the MPEG compressed data into a laser signal based on a recording signal on the recording medium and outputs the laser signal. The disk motor 3 is also controlled by the servo processor 8, and the laser signal output from the pickup 2 is used to write data on the recording medium 1 driven by the disk motor 3.
[0033]
Also,
Next, an operation of grouping and processing a plurality of contents recorded on the recording medium 1 will be described.
[0034]
FIG. 2 is a diagram illustrating a display screen of a grouping operation of a plurality of contents according to the embodiment of the present invention.
[0035]
When the user operates a remote controller or the like (not shown) to instruct display of a display screen in a grouping operation of a plurality of contents, the system controller 10 controls the graphic display 41 in response to the instruction. These display screens are created, and the display screen output from the video external output unit 13 is displayed on the display means 30 to be displayed.
[0036]
FIG. 2A is a diagram illustrating an edit menu in which a grouping operation of a plurality of contents recorded on the recording medium 1 is selected by a user. When a plurality of content grouping operations are selected by the user, a screen shown in FIG. 2B is displayed.
[0037]
FIG. 2B is a display screen for selecting (setting) a grouping reference of a plurality of contents recorded on the recording medium 1. When the user selects a grouping criterion for a plurality of contents from the display screen, the grouping criterion is set in the system controller 10.
[0038]
It should be noted that the genre here can be appropriately set by the user.
[0039]
FIG. 2C shows a state in which the system controller 10 has grouped the contents according to the selected (set) grouping reference and the identification information of the plurality of contents recorded on the recording medium 1. Is a display screen displayed as follows. Here, each content is represented by title A, title B, title C, title D, title E, and title F.
[0040]
That is, title A is classified into group 1, title B is group 2, title C is group 1, title D is group 2, title E is group 3, and title F is classified into group 2 (group 1: sports, Group 2: Drama Series X, Group 3: Music).
[0041]
FIG. 2D shows a screen for selecting a compression rate (recording rate) when compressing the grouped contents. The compression rates (recording rates) selected here are the two types described below.
[0042]
One is to match the minimum recording rate among the grouped contents. As will be described later, the minimum recording rate is extracted from the grouped contents, and the grouped contents are collectively compressed for each group in accordance with the minimum recording rate. The operation of matching the grouped content to the content having the minimum recording rate for each group is performed by the system controller 10.
[0043]
The other is for the user to select a compression rate (recording rate) for collectively compressing the content for each group. Here, as indicated by reference numeral 39, 4M bit / sec is selected as the compression rate. This selection result is set in the system controller 10.
[0044]
The grouping of the plurality of contents recorded on the recording medium and the selected compression rate (recording rate) are all set in the system controller 10 as described above.
[0045]
Upon receiving a content compression execution instruction (not shown) from the user to reduce the capacity of a plurality of contents recorded on the recording medium 1, the system controller 10 controls the servo processor 8, the disk motor 3, and the pickup. Under control, the plurality of grouped contents (video signals) are read out from the recording medium 1 in group units and transmitted to the reproduction amplifier 4.
[0046]
The reproduction amplifier 4 stores a plurality of received contents (video signals) in the recording / reproduction memory buffer 7 via the data processor 6. A plurality of contents (video signals) stored in the recording / reproduction memory buffer 7 are subjected to MPEG2 expansion processing by an MPEG2 decoder.
[0047]
A plurality of contents (video signals) read from the recording medium 1 in the above-described group units and subjected to decompression processing are input to the MPEG2 encoder 11. In the MPEG2 encoder 11, a plurality of contents (video signals) that have been read out in units of the groups and that have undergone expansion processing are subjected to compression processing. The compression rate (recording rate) at this time is one of the two types of compression rates selected by the user as described above.
[0048]
FIG. 3 is a flowchart according to the embodiment of the present invention.
[0049]
Reference numeral 101 is a start step. For example, it starts when the user instructs a grouping operation. Subsequently, the process proceeds to the step denoted by reference numeral 102.
[0050]
Reference numeral 102 denotes a step of selecting a grouping criterion for grouping a plurality of contents recorded on the recording medium 1. Here, a selection menu is displayed in a list as shown in FIG. The user selects a grouping criterion from this display. Subsequently, the process proceeds to the step denoted by reference numeral 103.
[0051]
Reference numeral 103 denotes a step in which the system controller of the recording / reproducing apparatus groups a plurality of contents according to the selected grouping criterion. Subsequently, the process proceeds to the step denoted by reference numeral 104.
[0052]
Reference numeral 104 denotes a step in which the user confirms each content grouped according to the grouping criteria. Here, as shown in FIG. 2C, a group confirmation display is displayed in a list. The user confirms each grouped content from this display. Subsequently, the process proceeds to the step denoted by reference numeral 105.
[0053]
Reference numeral 105 is a step of setting a compression reference value for each of the grouped contents. Here, as shown in FIG. 2D, two types of compression reference values can be set: compression to match the minimum recording rate in the group, and selection of the compression rate by the user. Subsequently, the process proceeds to the step denoted by reference numeral 106.
[0054]
Reference numeral 106 denotes a step of reading a plurality of contents recorded on the recording medium by the MPEG2 compression for each group according to the grouping. Subsequently, the process proceeds to the step denoted by reference numeral 107.
[0055]
Reference numeral 107 denotes a step in which the MPEG2 decoder (decompression means) 9 decompresses a plurality of contents recorded in the MPEG2 compression and read for each group. Subsequently, the process proceeds to the step denoted by reference numeral 108.
[0056]
Reference numeral 108 denotes a step of compressing (MPEG2 compression) a plurality of contents, which have been collectively subjected to MPEG2 decompression for each group as described above, for each grouped group according to the set compression rate (compression rate). It is. Here, the MPEG2 encoder (compression means) 11 is used for the compression. Subsequently, the process proceeds to the step denoted by reference numeral 109.
[0057]
Reference numeral 109 denotes a step of recording, on the recording medium 1, a plurality of contents that have been subjected to compression (MPEG2 compression) processing for each group according to the compression rate (compression rate) set as described above. Subsequently, the process proceeds to the step denoted by reference numeral 110.
[0058]
Reference numeral 110 is an end step, and the processing here ends.
[0059]
Next, an example of grouping a plurality of contents when performing the process according to the embodiment of the present invention will be described.
[0060]
FIG. 4 is an example of a plurality of contents recorded on the recording medium 1 together with identification information so that a plurality of contents input from the outside can be identified for each content according to the embodiment of the present invention.
[0061]
Reference numeral 61 denotes a content (content A) with a title A. The content A is provided with a sport as identification information for identifying each content, and is recorded on the recording medium 1.
[0062]
Reference numeral 62 denotes a content with a title B (content B). The content B is recorded on the recording medium 1 with a drama series X added as identification information for identifying each content.
[0063]
Reference numeral 63 denotes a content with a title C (content C). The content C is recorded on the recording medium 1 with sports added as identification information for identifying each content.
[0064]
Reference numeral 64 denotes a content (content D) with a title D. The content D is recorded on the recording medium 1 with a drama series X added as identification information for identifying each content.
[0065]
Reference numeral 65 denotes a content (content E) with a title E. The content E is recorded on the recording medium 1 with music added thereto as identification information for identifying each content.
[0066]
Reference numeral 66 denotes a content with a title F (content F). The content F is recorded on the recording medium 1 with a drama series X added as identification information for identifying each content.
[0067]
FIG. 5 is a diagram illustrating an example of grouping and compression processing for each group according to the embodiment of the present invention. This example shows an example in which compression processing is performed in accordance with the minimum recording rate in the group.
[0068]
In these, the contents recorded on the recording medium 1 are classified into predetermined groups on the basis of the identification information, grouped, collectively decompressed for each group, and then compressed.
[0069]
That is, the content A61 and the content C63 are recorded with the sport as the identification information and are recorded on the recording medium 1. Here, for example, each genre is selected as a grouping standard, and these are grouped using sports as a grouping standard. Then, these grouped contents are decompressed for each group, and then compressed in accordance with the minimum recording rate in the group.
[0070]
The minimum recording rate in the group to which the content A61 and the content C63 belong was the recording rate of the content C of 3 Mbit / sec. As described above, the content A61 is compressed at a recording rate that matches the recording rate of the content C63. Therefore, both the content A61 and the content C63 are compressed at a recording rate of 3 Mbit / sec after being expanded.
[0071]
Further, the content B62, the content D64, and the content F66 have been recorded on the recording medium 1 with the drama series X added as identification information. These are grouped using the drama series X as a grouping standard. Then, these grouped contents are decompressed for each group, and then compressed in accordance with the minimum recording rate in the group.
[0072]
The minimum recording rate in the group to which the content B62, the content D64, and the content F66 belong was 4M bit / sec of the recording rate of the content B62. As described above, the content D64 and the content F66 are compressed at a recording rate that matches the recording rate of the content B62. Therefore, the content B62, the content D64, and the content F66 are all compressed at a recording rate of 4 Mbit / sec after being expanded.
[0073]
The content E65 is recorded on the recording medium 1 with music added as identification information. It is grouped using music as a grouping criterion. Then, these grouped contents are decompressed for each group, and then compressed in accordance with the minimum recording rate in the group.
[0074]
The minimum recording rate in the group to which the content E65 belongs was the recording rate of the content E65 of 4 Mbit / sec. As described above, the content E65 is compressed at a recording rate that matches the recording rate of the content E65. Therefore, the content E65 is compressed at a recording rate of 4 Mbit / sec after being expanded.
[0075]
The content compressed for each group is recorded on the recording medium 1 via the recording / reproduction memory buffer 7, the data processor 6, the recording amplifier 5, and the like as described above.
[0076]
FIG. 6 is a diagram illustrating another example of grouping and compression processing for each group according to the embodiment of the present invention. In this example, an example is shown in which compression processing has been performed in accordance with the recording rate set by the user. Here, it is set so that sports are compressed to 3.5M bit / sec or less, drama series X is compressed to 4.5M bit / sec or less, and music is compressed to 4.5M bit / sec or less.
[0077]
In these, a plurality of contents recorded on the recording medium 1 are classified into predetermined groups based on the identification information, grouped, collectively decompressed for each group, and then compressed.
[0078]
The content A61 and the content C63 have been recorded on the recording medium 1 with sports added as identification information. Here, for example, genres are selected as the grouping criteria, and these are grouped based on sports as the grouping criteria. Then, after the grouped contents are expanded for each group, the sports are compressed to 3.5 Mbit / sec or less.
[0079]
Therefore, the content A61 is compressed at a recording rate of 3.5 bits / sec after the expansion processing. The content C63 is compressed at a recording rate of 3 Mbit / sec after being expanded.
[0080]
The content B62, the content D64, and the content F66 are recorded on the recording medium 1 with the drama series X added as identification information. These are grouped using the drama series X as a grouping standard. These contents related to the drama series X are compressed at a recording rate of 4.5 Mbit / sec or less.
[0081]
Therefore, the content B62 is compressed at a recording rate of 4 Mbit / sec after the expansion processing. The contents D64 and F66 are compressed at a recording rate of 4.5 Mbit / sec after the expansion processing.
[0082]
The content E65 is recorded on the recording medium 1 with music added as identification information. It is grouped using music as a grouping criterion. After the grouped contents are expanded for each group, the music is compressed to 4.5 Mbit / sec or less.
[0083]
The plurality of contents compressed for each group are recorded on the recording medium 1 via the recording / reproducing memory buffer 7, the data processor 6, the recording amplifier 5, and the like as described above.
[0084]
FIG. 7 is a diagram illustrating another example of grouping according to the embodiment of the present invention. Here, regularly reserved or recorded programs (a plurality of contents) are grouped.
[0085]
For example, the content B62, the content D64, and the content F66 are recorded on the recording medium 1 with a regular reservation (recording or viewing reservation) as identification information.
[0086]
The content B62 is recorded on the recording medium 1 on Sunday, November 3, 8:00 AM to 9:00 AM, and with information of the channel 100. The content D64 is recorded on the recording medium 1 on Sunday, November 10, 8:00 AM to 9:00 AM, and with information of the channel 100. Further, the content F66 is recorded on the recording medium 1 on Sunday, November 17, 8:00 AM to 9:00 AM, and information of the channel 100 is added.
[0087]
The system controller 10 detects from this information that a plurality of contents of the same channel at the same time are regularly reserved, and groups them into the same group.
[0088]
FIG. 8 is a diagram illustrating another example of grouping according to the embodiment of the present invention. Here, the names of broadcasting stations (OO broadcasts) that have received broadcasts are grouped as identification information.
[0089]
For example, the content B62, the content D64, and the content F66 are recorded on the recording medium 1 with the name of the broadcast station (XX broadcast) that received the broadcast as identification information.
[0090]
The content B62, the content D64, and the content F66 are recorded on the recording medium 1 with the name of the broadcast station (OO broadcast) that received the broadcast.
[0091]
The system controller 10 detects that XX broadcast is being received from these pieces of information, and groups them into the same group.
[0092]
FIG. 9 is a diagram illustrating another example of grouping according to the embodiment of the present invention. Here, program information (EPG (Electrical program guide) information) acquired from outside is grouped as identification information. These pieces of program information may use information transmitted on the Internet or may use information transmitted by digital broadcasting.
[0093]
For example, the content B62, the content D64, and the content F66 are recorded on the recording medium 1 with the series descriptors # 1, # 2, and # 3 transmitted as identification information, respectively. Here, series descriptors: $ 1, $ 2, $ 3 indicate a series.
[0094]
The system controller 10 detects that series descriptors: $ 1, $ 2, and $ 3 are recorded in a plurality of contents from these pieces of information, and groups them into the same group.
[0095]
FIG. 10 is a diagram illustrating an example in which a plurality of contents recorded on the recording medium 1 are shared by a plurality of users and are grouped for each individual according to the embodiment of the present invention.
[0096]
FIG. 10A shows an example in which the owner is recorded as identification information together with each content recorded on the recording medium 1.
[0097]
The content A61 has the owner K. as identification information. M is recorded. The content B62 has the owner S.D. Mr. S and K. M is recorded. The content C63 is the owner K. as identification information. M is recorded.
[0098]
FIG. It is an example of content grouped using Mr. M as a grouping reference (identification information).
[0099]
The content A61, the content B62, and the content C63 belong to the owner K. They are grouped based on M. Here, K. The content owned by Mr. M is set to be compressed to 3M bit / sec or less. Therefore, the plurality of contents recorded on the recording medium 1 are K. They are grouped into M's possession, are collectively decompressed for each group, and are then compressed.
[0100]
In the above description, when a plurality of contents are subjected to MPEG2 decompression processing and then MPEG2 compression processing, the processing speed of the compression processing is set to be smaller than the processing speed of the decompression processing, such as two systems for compression processing and one system for decompression processing. It is desirable to increase.
[0101]
With the above-described configuration, a plurality of contents are grouped. For example, a large amount of a plurality of contents is recorded on a recording medium (an HDD disk, a DVD disk, or the like), and a shortage of the capacity of the recording medium occurs. Then, when compressing a plurality of contents recorded on the recording medium, the operation of selecting a plurality of contents to be compressed can be easily performed.
[0102]
Further, usability of the selection operation by the user can be improved.
[0103]
In addition, since a plurality of contents can be collectively expanded or compressed for each group, the processing speed of the recording / reproducing apparatus can be improved.
[0104]
【The invention's effect】
As described above, according to the embodiment of the present invention, by performing grouping of a plurality of contents, it is possible to easily perform an operation of selecting a plurality of contents to be compressed.
[0105]
Further, usability of the selection operation by the user can be improved.
[0106]
In addition, since a plurality of contents can be collectively expanded or compressed for each group, the processing speed of the recording / reproducing apparatus can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an embodiment according to the present invention.
FIG. 2 is an exemplary view for explaining a display screen of a grouping operation of a plurality of contents according to the embodiment of the present invention;
FIG. 3 is a flowchart according to the embodiment of the invention.
FIG. 4 is a diagram illustrating an example in which a plurality of externally input contents are recorded together with identification information according to the embodiment of the present invention.
FIG. 5 is an exemplary view for explaining an example of grouping and compression processing for each group according to the embodiment of the present invention;
FIG. 6 is a view for explaining another example of grouping and compression processing for each group according to the embodiment of the present invention.
FIG. 7 is a view for explaining another example of grouping according to the embodiment of the present invention.
FIG. 8 is a view for explaining another example of grouping according to the embodiment of the present invention.
FIG. 9 is a view for explaining another example of grouping according to the embodiment of the present invention.
FIG. 10 is a diagram illustrating an example in which a plurality of recorded contents are shared by a plurality of users and grouped for each individual according to the embodiment of the present invention.
[Explanation of symbols]
1. Recording medium (DVD disk, HDD disk, etc.)
2 ... Pickup
3… disk motor
4. Reproduction amplifier
5 ... Recording amplifier
7… memory buffer (cache memory)
8… Servo processor
9 ... MPEG2 decoder (expansion means)
10… System controller
11 ... MPEG2 encoder (compression means)
12 ... Video DAC
13 ... Video output unit
14… Video A / D
15… Video input selector
16… Video input unit
17… Broadcast station information decoder
18… Tuner
19… Antenna
20: Audio A / D
21… Voice input selector
22 ... voice input section
23 ... Audio DAC
24 ... audio external output unit
30 Display device
31… Program information input section
41… Graphic display

Claims (16)

In a recording / reproducing apparatus for recording externally input content on a recording medium, content recording means for recording on the recording medium together with identification information so that the externally input content can be identified for each content,
Grouping reference setting means for setting a grouping reference for grouping the content recorded on the recording medium into a predetermined group,
Grouping means for classifying the content recorded on a recording medium into respective predetermined groups based on the identification information according to the set grouping standard,
Compression means for compressing the content recorded on a recording medium for each of the grouped groups, and recording the content compressed for each group on a recording medium. In a recording / reproducing apparatus for recording an externally input content on a recording medium, a content recording means for performing a first compression process on a recording medium together with identification information so as to identify the externally input content for each content and recording the content. When,
Grouping reference setting means for setting a grouping reference for grouping the content recorded on the recording medium into a predetermined group,
Grouping means for classifying the content recorded on the recording medium into predetermined groups based on the identification information, according to the set grouping standard,
Decompression means for reading out the content recorded on the recording medium that has been subjected to compression processing for each of the grouped groups and performing decompression processing;
Compression means for performing a second compression process on the content subjected to expansion processing for each group, and recording the content subjected to the second compression process on a recording medium. . In a recording / reproducing apparatus for recording externally input content on a recording medium, content recording means for recording on the recording medium together with identification information so that the externally input content can be identified for each content,
Grouping reference setting means for setting a grouping reference for grouping the content recorded on the recording medium into a predetermined group,
Grouping means for classifying the content recorded on the recording medium into predetermined groups based on the identification information, according to the set grouping standard,
Compression rate setting means for setting a compression rate for compressing the grouped content;
Compression means for compressing the content recorded on the recording medium for each of the grouped groups in accordance with the set compression rate, and compressing the content in accordance with the compression rate set for each group. A recording / reproducing apparatus characterized in that recorded content is recorded on a recording medium. In a recording / reproducing apparatus for recording externally input content on a recording medium, content recording means for recording on the recording medium together with identification information so that the externally input content can be identified for each content,
Grouping reference setting means for setting a grouping reference for grouping the content recorded on the recording medium into a predetermined group,
Grouping means for classifying the content recorded on a recording medium into respective predetermined groups based on the identification information according to the set grouping standard,
Recording rate setting means for performing an arithmetic process for matching the recording rate for compressing the grouped content to the minimum recording rate in the content of each group,
Compression means for compressing the content recorded on the recording medium for each of the grouped groups, in accordance with the calculated recording rate; and for each group in accordance with the calculated recording rate. A recording / reproducing apparatus for recording compressed content on a recording medium. In a recording / reproducing apparatus for recording externally input content on a recording medium, content recording means for recording on the recording medium together with identification information so that the externally input content can be identified for each content,
Grouping reference setting means for setting a grouping reference for grouping the content recorded on the recording medium into a predetermined group,
Grouping means for classifying the content recorded on a recording medium into respective predetermined groups based on the identification information according to the set grouping standard,
Grouping confirmation means for confirming the grouped content;
Compression means for compressing the content recorded on the recording medium for each of the groups for which the grouping has been confirmed, and recording the compressed content for each group for which the grouping has been confirmed for the recording medium. Recording and playback device. A recording / reproducing apparatus that records content input from outside on a recording medium so that a plurality of owners can share the content,
Content recording means for recording the content together with the identification information on a recording medium so that the content inputted from outside and the owner of the content can be identified;
Grouping reference setting means for setting a grouping reference for grouping the content recorded on the recording medium into a predetermined group,
Grouping means for classifying the content recorded on the recording medium into predetermined groups including the owner of the content, based on the identification information, according to the set grouping standard,
Compression means for compressing the content recorded on the recording medium for each of the grouped groups, and recording the content compressed for each group on a recording medium so that a plurality of owners can share the content. Recording / reproducing apparatus characterized by the above-mentioned. 7. The recording / reproducing apparatus according to claim 1, wherein the compression processing or the expansion processing is processing related to MPEG. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit performs grouping according to a genre included in the content recorded on the recording medium. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit performs grouping according to a genre set by a user. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit includes a unit for grouping according to a regularly reserved program. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit includes a unit for grouping according to a broadcasting station that has received the broadcast. 8. The recording / reproducing apparatus according to claim 1, wherein said grouping means includes means for grouping according to program information acquired from outside. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit includes a unit for grouping according to reproduced content. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit includes a unit for grouping according to a date on which the content is recorded. 8. The recording / reproducing apparatus according to claim 1, wherein the grouping unit includes a unit for grouping according to a content owner. Recording the externally input content together with identification information so that the content can be identified for each content;
Setting a grouping standard for grouping the content recorded on the recording medium into a predetermined group,
According to the set grouping criterion, based on the identification information, a step of classifying the recorded content into predetermined groups, respectively,
Compressing the content for each of the grouped groups.

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