JP2009278283A - Content reproducing device, content reproducing method, content reproducing program, and recording medium having the program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a content reproducing device capable of recording the broadcasting of the same program and a different form compared to broadcasting being viewed. <P>SOLUTION: The content reproducing device 1000 is capable of simultaneously receiving one-segment broadcasting and full-segment broadcasting and includes a viewing content selection part 103 for selecting the broadcasting to be viewed and a recording content selection part 105 for selecting the broadcasting to be recorded. Thus, the full-segment broadcasting is recorded while viewing the one-segment broadcasting and the one-segment broadcasting is recorded while viewing the full-segment broadcasting. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention mainly includes a playback content selection unit that selects playback content from a plurality of contents, a content playback unit that plays back playback content, a recording content selection unit that selects recording content, and a recording The present invention relates to a content reproduction device including a content recording unit that records content for recording on a recording medium.

  The terrestrial digital broadcast is a broadcast performed by a digital radio station, and is characterized in that the received video has high image quality and high sound quality, and that information can be transmitted and received bidirectionally.

  In recent years, one seg broadcasting, which is terrestrial digital broadcasting for mobile terminals, has been started, and it has become possible to view television broadcasts on small mobile terminals such as mobile phones or PDAs. In car navigation systems and the like, dual terminals capable of receiving both general terrestrial digital broadcasting (hereinafter referred to as full-segment broadcasting) and one-segment broadcasting, in which many receivable terminals are fixed receiving terminals, are commercially available. Yes. One-segment broadcasting has been broadcast as a supplementary broadcast of full-segment broadcasting since the beginning of broadcasting, and many programs broadcast by one-segment broadcasting are simultaneous broadcasts that broadcast the same program as full-segment broadcasting.

  In addition, full-segment broadcasting is characterized by the fact that the video is compressed by the encoding method MPEG-2 and the video quality is good, but the reception area is narrow and weak to reception errors. Conversely, one-segment broadcasting is encoded by video. Method H. Since the video is compressed by H.264 and the compression rate is very high, the video quality is poor, but the reception area is wide and it is resistant to reception errors. The dual terminal uses such characteristics of one-segment broadcasting and full-segment broadcasting, and if full-segment broadcasting reception sensitivity is good and high-quality video can be received, full-segment broadcasting is viewed, otherwise It is characterized by selecting a broadcast to be viewed so as to view a one-segment broadcast. Specifically, broadcasts to be received and viewed are controlled according to the radio wave conditions of each broadcast.

  In general, a mobile terminal has a function of recording and playing back broadcast content. Furthermore, terminals that have a time-shift playback function, which is a function that temporarily stores received broadcast data, plays back fast from the start of the stored broadcast data, and gradually catches up with the actual broadcast, are also on sale. .

  By the way, conventionally, a mobile terminal capable of receiving one-segment broadcasting cannot receive full-segment broadcasting due to a problem of CPU processing capability. However, in recent years, with the improvement of the processing capability of mobile terminals and the enlargement of the display screen, there is an increasing demand for mobile terminals that can receive both one-segment broadcasting and full-segment broadcasting. In addition, full-seg content that is content broadcast by full-seg broadcasting has a larger data amount than one-seg content that is content broadcast by one-seg broadcast. For this reason, in order to record full-segment content, a large-capacity recording medium is required. However, various recording media have also been increased in capacity, starting with an SD card that is a typical removable recording medium that can be used in a mobile terminal. Therefore, there is an increasing demand not only for watching full-segment broadcasting using a mobile terminal but also for recording. Furthermore, there is a demand for a dual terminal capable of receiving both one-segment broadcasting and full-segment broadcasting that can record the best one of the one-segment contents and the full-segment contents and perform time-shift playback while viewing the full-segment contents. .

  In Patent Document 1, in order to realize such a request, when the free space of the recording medium is larger than the capacity necessary for recording the full segment content, the full segment content is viewed and recorded. Discloses a technique for viewing and recording one-seg content.

  A schematic configuration of a conventional digital content playback apparatus disclosed in Patent Document 1 will be described with reference to FIG. A conventional digital content playback device 6000 includes a broadcast wave input unit 601, a content extraction unit 602, a recording medium free space calculation unit 603, a content selection unit 604, a content decryption display unit 605, and a content recording unit 606. It has become.

The broadcast wave input unit 601 receives broadcast data such as terrestrial digital broadcast. The content extraction unit 602 separates the data received by the broadcast wave input unit 601 into full segment content and one segment content. The recording medium free space calculation unit 603 calculates the free space of the recording medium at the recording destination. The content selection unit 604 determines whether the free space of the recording medium calculated by the recording medium free space calculation unit 603 is more than the free space necessary for recording the full segment content, Decide which one-seg content to watch and record. Specifically, the recording medium free space calculation unit 603 calculates the recordable time when recording full segment content from the free space of the recording medium. Thereafter, the content selection unit 604 selects the full segment content when the calculated recordable time is equal to or longer than the predetermined time, and selects the one segment content otherwise. The content decryption display unit 605 decrypts the content selected by the content selection unit 604 and displays it on a monitor or the like. The content recording unit 606 records the content selected by the content selection unit 604 on a predetermined recording medium.
Japanese Patent Laying-Open No. 2005-033622 (published February 3, 2005)

  However, when viewing and recording are performed using the conventional digital content playback device disclosed in Patent Document 1, content viewed through the content decoding display unit 605 and content recorded through the content recording unit 606 are both content. The content is selected by the selection unit 604. That is, the content that is viewed through the content decryption display unit 605 and the content that is recorded through the content recording unit 606 are the same in terms of both content and image quality. Therefore, since the full segment content cannot be viewed while recording the one segment content, there is a problem that if the recording medium has a small free space during recording, the one segment content having a small image size and frame rate must be viewed. .

  In addition, the one-segment content cannot be viewed while recording the full-segment content. Therefore, when you want to save power consumption while moving, you can watch full-segment content that is not much different from one-seg content while watching one-seg content that consumes relatively little power. There arises a problem that the video cannot be viewed.

  The present invention has been made in view of the above problems, and its purpose is to record another content that is the same as the content but has a different format such as image quality while viewing the specific content. It is to realize a possible content reproducing apparatus.

In order to solve the above problems, the content reproduction apparatus according to the present invention provides:
A content playback apparatus capable of simultaneously receiving a plurality of contents obtained by compressing the same program in different forms,
Playback content selection means for selecting at least one content from among the plurality of contents as playback content;
Content playback means for playing back the playback content;
A recording content selection means for selecting at least one content from among the plurality of contents as a recording content;
Content recording means for recording the recording content on a recording medium is provided.

  According to the above configuration, the content reproduction apparatus according to the present invention simultaneously receives a plurality of contents obtained by compressing the same program in different forms. For example, full segment content is received as content with a lower compression rate, while one segment content is received as content with a higher compression rate.

  The content playback apparatus selects at least one content as the playback content from the plurality of received content. At this time, for example, full segment content is selected. Since the content reproduction apparatus reproduces the selected content, for example, when full-segment content is selected and reproduced, the user views the reproduced full-segment content.

  In addition, the content reproduction apparatus selects at least one content as the recording content from the plurality of received content. For example, when full segment content is selected as the playback content, a different one segment content is selected as the recording content. The content playback apparatus records the selected recording content on a recording medium. Therefore, if the one-segment content is selected as the recording content, the one-segment content is recorded on the recording medium while reproducing the full-segment content.

  As described above, the content playback apparatus is more capable of playing back playback content than the playback content even if the recording medium does not have enough free space to record the same content as the playback content. Content with a high compression rate can be recorded as recorded content. Therefore, the content reproduction apparatus can reproduce content with a low compression rate while recording content with a high compression rate.

In order to solve the above problems, the content reproduction method according to the present invention provides:
A content reproduction method capable of simultaneously receiving a plurality of contents obtained by compressing the same program in different forms,
A playback content selection step of selecting at least one content as the playback content from the plurality of contents,
A content playback step of playing back the playback content;
A recording content selection step of selecting at least one content as the recording content from the plurality of contents;
A content recording step of recording the recording content on a recording medium.

  According to said structure, there exists an effect similar to the content reproduction apparatus based on this invention.

  In the content playback apparatus according to the present invention, it is preferable that the playback content selection unit selects the playback content according to the type of power source for operating the content playback apparatus.

  According to the above configuration, the content playback apparatus according to the present invention selects at least one content from among the plurality of received content as playback content according to the type of power supply. For example, when the power source for operating the content playback device is a battery, one-seg content is selected as playback content, and when the power source for operating the content playback device is an AC power source, full-seg content is selected.

  According to said structure, there exists an effect that the electric power which a content reproduction apparatus consumes according to a condition can be reduced.

  In the content playback apparatus according to the present invention, it is further preferable that the recording content selection unit selects the recording content according to a recording medium on which the recording content is recorded.

  According to the above configuration, the content reproduction apparatus according to the present invention selects at least one content from the plurality of received content as a recording content according to the recording medium. For example, when the recording medium is an SD card, one-segment content is selected as the recording content, and when the recording medium is an HDD, full-segment content is selected.

  According to said structure, there exists an effect that a content can be recorded for a long time according to a condition.

  In the content reproduction apparatus according to the present invention, it is preferable that the recording content selection unit selects the recording content according to a capacity of a recording medium on which the recording content is recorded.

  According to the above configuration, the content reproduction apparatus according to the present invention selects at least one content from the plurality of received content as a recording content according to the free space of the recording medium. For example, when the capacity of the storage medium is less than 512 MB, one-segment content is selected as the recording content, and when the capacity of the recording medium is 512 MB or more, full-segment content is selected as the recording content.

  In the content reproduction apparatus according to the present invention, it is preferable that the recording content selection unit selects the recording content according to a free space of a recording medium on which the recording content is recorded.

  According to the above configuration, the content reproduction apparatus according to the present invention selects at least one content from the plurality of received content as a recording content according to the free space of the recording medium. For example, when the free space of the storage medium is less than 512 MB, the one-segment content is selected as the recording content, and when the free space of the recording medium is 512 MB or more, the full-segment content is selected as the recording content.

  As described above, the content playback apparatus can record content for a long time by selecting content with a high compression rate as recording content when the free capacity of the recording medium is less than a predetermined value. There is an effect. In addition, when the free capacity of the recording medium is equal to or greater than a predetermined value, it is possible to record high-quality content by selecting content with a low compression rate as content for recording.

  In the content reproduction apparatus according to the present invention, it is preferable that the recording content selection unit selects the recording content according to a writing speed of a recording medium on which the recording content is recorded.

  According to the above configuration, the content reproduction apparatus according to the present invention selects at least one content from the plurality of received content as the recording content according to the writing speed of the recording medium. For example, when the writing speed of the storage medium is less than 2 MB / s, the one seg content is selected as the recording content, and when the writing speed of the recording medium is 2 MB / s or more, the full seg content is selected as the recording content.

  As described above, the content reproduction apparatus can record all the selected content on the recording medium by selecting the content having a data rate lower than the writing speed of the recording medium from the received content. There is an effect.

In order to solve the above problem, the content reproduction apparatus according to the present invention provides:
In a content playback apparatus capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
Real-time playback content selection means for selecting at least one content as the real-time playback content from the plurality of contents;
Time shift playback content selection means for selecting at least one content from among the plurality of contents as time shift playback content;
Time-shift playback content recording means for recording the time-shift playback content on a recording medium;
Playback content selection means for selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
Content reproduction means for reproducing the content for reproduction is provided.

  Here, the content for real-time reproduction is content that is reproduced substantially simultaneously with reception of the content by the content reproduction means.

  According to the above configuration, the content reproduction apparatus according to the present invention simultaneously receives a plurality of contents obtained by compressing the same program in different forms. For example, full segment content is received as content with a lower compression rate, while one segment content is received as content with a higher compression rate.

  The content reproduction apparatus selects at least one content as the real-time reproduction content from the received plurality of contents. At this time, for example, full segment content is selected.

  In addition, the content reproduction apparatus selects at least one content as the content for time shift reproduction from the plurality of received content. For example, when full-seg content is selected as real-time playback content, a different one-seg content is selected as time-shift playback content. The content reproduction apparatus records the selected content for time shift reproduction on a recording medium.

  Further, the content playback apparatus selects at least one content as the playback content from the selected real-time playback content and the selected time-shift playback content. For example, it is assumed that the real-time playback content is full-seg content and the time-shift playback content is one-seg content. When full segment content is selected as the content for reproduction, the user views the reproduced full segment content.

  As described above, the content playback apparatus records the content having a higher compression rate than the real-time playback content on the recording medium as the time-shift playback content during playback of the real-time playback content. As compared with the case where content having the same compression rate is recorded on a recording medium as time shift playback content, it is possible to record time shift playback content for a long time.

  In the content playback apparatus according to the present invention, the time shift playback content selection means further selects the time shift playback content according to a free space of a recording medium on which the time shift playback content is recorded. Is desirable.

  According to the above configuration, the content playback apparatus according to the present invention selects at least one content from the received plurality of content as time shift playback content according to the free space of the recording medium. For example, when the free capacity of the storage medium is less than 512 MB, the one-segment content is selected as the time-shifted playback content, and when the free capacity of the recording medium is 512 MB or more, the full-segment content is selected as the time-shifted playback content.

  As described above, when the free space of the recording medium is less than a predetermined value, the content playback apparatus records content for a long time by selecting content with a high compression rate as content for time shift playback. There is an effect that can be. Further, when the free capacity of the recording medium is equal to or greater than a predetermined value, it is possible to record high-quality content by selecting content with a low compression rate as time-shifted playback content.

In order to solve the above problem, the content reproduction apparatus according to the present invention provides:
A content playback apparatus capable of simultaneously receiving a plurality of contents obtained by compressing the same program in different forms,
Real-time playback content selection means for selecting at least one content as the real-time playback content from the plurality of contents;
A plurality of time-shift playback content recording means for recording each of the plurality of contents as time-shift playback content on each recording medium;
Playback content selection means for selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
Content reproduction means for reproducing the content for reproduction is provided.

  According to the above configuration, the content reproduction apparatus according to the present invention simultaneously receives a plurality of contents obtained by compressing the same program in different forms. For example, full segment content is received as content with a lower compression rate, while one segment content is received as content with a higher compression rate.

  The content reproduction apparatus selects at least one content as the real-time reproduction content from the received plurality of contents. At this time, for example, full segment content is selected.

  In addition, the content reproduction apparatus records each of the received plurality of contents on each recording medium as time shift reproduction content. For example, when one-segment content and full-segment content are received, the one-segment content is recorded on a recording medium, and the full-segment content is recorded on another recording medium.

  Furthermore, the content playback apparatus selects at least one content as the playback content from the selected real-time playback content and each recorded time shift playback content. For example, it is assumed that the real-time playback content is full segment content, and one-segment content and full segment content are recorded as time shift playback content. When the full segment content of the real-time playback content is selected as the playback content, the user views the played full segment content.

  As described above, the content playback apparatus can record all received content as time-shift playback content during playback of real-time playback content. Therefore, when content for time shift playback recorded at a certain time point exists on a plurality of recording media, content for time shift playback recorded on a plurality of recording media when the content at that time point is played back as playback content. There is an effect that it is possible to select the content to be played back from the list.

In order to solve the above problems, the content reproduction method according to the present invention provides:
In a content reproduction method capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
A real-time playback content selection step of selecting at least one content as the real-time playback content from the plurality of contents;
A time-shift playback content selection step of selecting at least one content from among the plurality of contents as time-shift playback content;
A time-shift playback content recording step for recording the time-shift playback content on a recording medium;
A playback content selection step of selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
A content reproduction step of reproducing the reproduction content.

  According to said structure, there exists an effect similar to the content reproduction apparatus based on this invention.

In order to solve the above problems, the content reproduction method according to the present invention provides:
In a content reproduction method capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
A real-time playback content selection step of selecting at least one content as the real-time playback content from the plurality of contents;
A plurality of time shift playback content recording steps for recording each of the plurality of contents as time shift playback content on each recording medium; and
A playback content selection step of selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
A content reproduction step of reproducing the reproduction content.

  According to said structure, there exists an effect similar to the content reproduction apparatus based on this invention.

  The content reproduction apparatus may be realized by a computer. In this case, a content playback device control program for realizing the content playback device in the computer by operating the computer as each of the above means, and a computer-readable recording medium recording the content playback device control program are also included in the scope of the present invention. to go into.

  As described above, since the content reproduction apparatus according to the present invention includes the viewing content selection unit and the recording content selection unit, the content is the same as the content while viewing the specific content. Another content with a different compression rate can be recorded. Therefore, it is possible to view content with a high compression rate while recording content with a low compression rate.

  In addition, since the content playback apparatus, the viewing content selection unit, and the time shift playback content selection unit according to the present invention are provided, when performing time shift playback while viewing specific content, the content is the same as the content. However, there is an effect that another content having a different compression rate can be recorded as content for time shift reproduction.

Embodiment 1
An embodiment of a content reproduction apparatus according to the present invention will be described with reference to FIG. The content playback apparatus according to the present invention is for decoding received content (video encoded stream and audio encoded stream) to display video data or output audio data. Content used for actual broadcasting includes subtitles and data broadcasting data in addition to video or audio. The content according to the present invention may also include such data. Good.

(Configuration of content playback apparatus 1000)
First, the content reproduction apparatus 1000 according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a main configuration of a content playback apparatus 1000 according to this embodiment. As shown in this figure, the content reproduction apparatus 1000 includes a broadcast wave input unit 101, a content extraction unit 102, a viewing content selection unit 103, a content decryption display unit 104, a recording content selection unit 105, and a content recording unit 106. It has. Details of each member will be described later.

(Broadcast wave input unit 101)
The broadcast wave input unit 101 receives a terrestrial digital broadcast.

(Content extraction unit 102)
The content extraction unit 102 extracts one-segment content and full-segment content from the received terrestrial digital broadcast.

(Viewing content selection unit 103)
The viewing content selection unit 103 selects whether to view the extracted one-segment content or full-segment content.

(Content decryption display unit 104)
The content decryption display unit 104 decrypts the input content and outputs it to a display device such as a monitor.

(Recording content selection unit 105)
The recording content selection unit 105 selects whether to record the extracted one-segment content or full-segment content.

(Content recording unit 106)
The content recording unit 106 records the input content on a recording medium.

(Operation of content playback apparatus 1000)
When the broadcast wave input unit 101 receives the terrestrial digital broadcast, it outputs the terrestrial digital broadcast to the content extraction unit 102. The content extraction unit 102 extracts the one seg content and the full seg content from the terrestrial digital broadcast output by the broadcast wave input unit 101 and outputs them to the viewing content selection unit 103 and the recording content selection unit 105. The viewing content selection unit 103 selects content to be viewed from the extracted one-segment content and full-segment content, and outputs the selected content to the content decryption display unit 104. Further, the recording content selection unit 105 selects content to be recorded from the extracted one-segment content and full-segment content, and outputs the selected content to the content recording unit 106. The content decryption display unit 104 decrypts the content selected by the viewing content selection unit 103, and outputs a signal obtained by the decryption to a monitor or the like. The content recording unit 106 records the content selected by the recording content selection unit 105 on a recording medium.

(Advantages of content playback apparatus 1000)
As described above, the content reproduction apparatus 1000 can select different contents in the viewing content selection unit 103 and the recording content selection unit 105. Accordingly, for example, by viewing the full segment content while recording the one segment content, there is an advantage that a high-quality image can be viewed even when the free space of the recording medium is small.

  In general, power consumption when viewing full-seg content is much larger than power consumption when viewing one-seg content. On the other hand, in the case of simply recording, the power consumption does not change so much whether it is full segment content or one segment content. For this reason, recording full-seg content while viewing one-seg content saves power during viewing and recording, and allows high-quality video from full-seg content to be viewed when playing back recorded content. There are advantages. This advantage is particularly effective when viewing and recording are performed at the same time in a situation where it is desired to save power consumption, such as when the content playback apparatus is activated only by a battery when away from home.

  In this embodiment, as a means for selecting the content to be recorded, the recorded content may be selected according to the type of the recording medium. Specifically, full-segment content is recorded when recording to a large-capacity DVD-RW / RAM or HDD while watching full-segment broadcasting, and one-segment content is recorded when recording to an SD card or internal memory. You may control to record.

  Also, some SD cards have a capacity of 8 MB and some have a capacity of 32 GB, and the capacity may be completely different even for the same recording medium type. Therefore, the content to be recorded may not be selected according to the type of the recording medium, but may be selected according to the capacity of the recording medium.

  Further, the content to be recorded may be selected according to the free capacity of the recording medium at the recording destination. Specifically, if the free space of the recording medium at the recording destination is a certain value or more, full-seg content is recorded. If not, one-seg content is recorded, or the recording time of scheduled recording is determined from the rate of full-seg content. If the estimated recording time is less than the estimated recording time, the full segment content may be recorded, and if not, the one segment content may be recorded. Further, the user may select the content to be recorded.

  Some recording media have a slow writing speed. Considering this, if the writing speed of the recording medium is a speed at which full segment content can be written, the full segment content may be recorded, and if not, one segment content may be recorded. Here, as a method of acquiring the writing speed of the recording medium, the writing speed may be acquired by performing a writing test when the recording medium is mounted. In addition, the content reproduction apparatus 1000 includes a wireless LAN adapter or Ethernet (registered trademark), records information on specifications including the writing speed of the recording medium on a server connected to the communication network, and the communication network from the server or the like. It is also possible to provide a mechanism for acquiring the writing speed by acquiring the specification information via. Alternatively, a predetermined writing speed may be determined in advance for each type of recording medium regardless of the actual writing speed, and the predetermined writing speed may be used as the recording medium writing speed.

  By the way, when broadcasting content is recorded on a recording medium, the recording is performed according to various standards, but there is a rule that both full-segment content and one-segment content should not exist in the same file depending on the standard. When recording according to such a standard, there is no problem even if the content to be viewed changes frequently, but if the content to be recorded changes frequently, a file is created each time the recorded content is switched, and the number of files is unlimited. May cause problems in file management. Therefore, the content playback apparatus 1000 may be provided with a control that does not switch the content to be recorded even if the reception quality of the broadcast changes for a certain period from the time when the content to be recorded is switched. .

  In addition, as a means for selecting content to be played back in the present embodiment, control is performed so that a one-segment broadcast is viewed if a battery is used during viewing, and a full-segment broadcast is viewed if an AC power supply is used. May be.

  Up to here, the means for selecting the content to be viewed and the means for selecting the content to be recorded have been described. However, these means may be combined and controlled.

  Also, although two broadcasts, one-segment broadcasting and full-segment broadcasting, have been described as examples of content received by the content reproduction apparatus 1000 according to the present embodiment, the content reproduction apparatus 1000 according to the present embodiment includes a broadcast wave input unit. The content that can be received in 101 is not limited to terrestrial digital broadcasting, but may be satellite broadcasting, CATV, analog terrestrial television broadcasting, or broadcasting via a communication line. At that time, the same encoding is used, for example, streaming playback via a communication line, as well as a mode of selecting one of contents compressed by different encoding methods such as one-segment broadcasting and full-segment broadcasting. It may be a form in which any one of the contents compressed at different compression rates in accordance with the method is selected. In addition, the content reproduction apparatus according to the present embodiment does not limit the content extracted by the content extraction unit 102 to one-segment content and full-seg content, but three or more contents from the content received by the broadcast wave input unit 101. If it can be extracted, three or more contents may be extracted. Furthermore, in the content reproduction apparatus 1000 according to the present embodiment, the viewing content selection unit 103 and the recording content selection unit 105 respectively select the content to be viewed and the content to be recorded from among three or more contents. One may be selected.

  The content playback apparatus 1000 according to the present embodiment can receive a program having the same content but a different format through a plurality of routes through which these various types of content are transmitted, or a plurality of types from these various types of signals. When it can be received using a means, it can be applied to a method of selecting a content to be viewed and a content to be recorded.

<Modified example of content playback device>
A modification of the content reproduction apparatus according to the present invention will be described with reference to FIG.

(Configuration of content playback apparatus 1001)
FIG. 2 is a block diagram showing the configuration of the content reproduction apparatus 1001. As shown in FIG. 2, the content reproduction apparatus 1001 includes a broadcast wave input unit 101, a content extraction unit 102, a viewing content selection unit 103, a content decryption display unit 104, and two content recording units 106. Since the details of each member have been described above, they are omitted here.

(Operation of Content Playback Device 1001)
When the broadcast wave input unit 101 receives the terrestrial digital broadcast, it outputs the terrestrial digital broadcast to the content extraction unit 102. The content extraction unit 102 extracts the one seg content and the full seg content from the terrestrial digital broadcast output by the broadcast wave input unit 101, and outputs them to the viewing content selection unit 103. Further, the content extraction unit 102 outputs the extracted one-segment content to one of the two content recording units 106 and the extracted full-seg content to the other of the two content recording units 106. The viewing content selection unit 103 selects content to be viewed from the extracted one-segment content and full-segment content, and outputs the selected content to the content decryption display unit 104. The content decryption display unit 104 decrypts the content selected by the viewing content selection unit 103, and outputs a signal obtained by the decryption to a monitor or the like. The content recording unit 106 records the input content on a recording medium.

(Advantages of content playback apparatus 1001)
As described above, since the content reproduction apparatus 1001 includes the two content recording units, there is an advantage that the one-segment content and the full-segment content can be recorded simultaneously. Therefore, when erasing either full-segment broadcast recorded content or one-segment broadcast recorded content after recording is completed, the content to be erased can be selected based on the recorded one-seg content and information about the full-segment content. There is an advantage.

  As a method for selecting the content to be erased, the content with the lower quality of the received data during recording may be selected. Also, the content with the shorter viewing time may be deleted. In addition, compared to a preset threshold value of the recording medium remaining after recording, control is performed so that one-segment content is erased if it is equal to or greater than the threshold value, and full-segment content is erased if it is less than the threshold value. Alternatively, the user may select content to be deleted. Further, as a method for selecting the content to be deleted, it is possible to select from these methods using the setting menu without being fixed to any one of these methods. Further, it may be configured not to automatically delete the content or to prompt the user to delete the content.

  In the modified example of the content reproduction apparatus according to the present embodiment, the content recording unit 106 is configured to be two. However, when N (N is a natural number of 3 or more) broadcasts can be viewed, the content recording unit 106 is N may be provided. In this case, any one of the N contents can be viewed and the N contents can be recorded simultaneously. Furthermore, as an application, when N (N is a natural number of 3 or more) broadcasts can be viewed, M (M is a natural number of less than N and 2 or more) content recording units 106 and N broadcasts May include a recording content selection unit 105 that selects M content to be recorded. In this case, any one of N contents can be viewed and M contents out of N contents can be recorded simultaneously.

  Further, in the modified example of the content reproduction apparatus according to the present embodiment, the content decoding display unit 104 is configured to be one. However, the content decoding display unit 104 is configured to include L content decoding units L (L is N or less and a natural number of 2 or more). It is good. In this case, it is possible to simultaneously display L contents out of N and record M contents out of N simultaneously. Concerning the simultaneous display of L contents, L videos can be displayed simultaneously by preparing L monitors or dividing the screen and displaying L screens on one monitor. There is no problem. If the sound of L contents is output at the same time, there is a problem that it becomes difficult to hear the sound. Therefore, the viewing content selection unit 103 needs to have a function of selecting L content from N broadcasts and simultaneously selecting one content for outputting audio from the selected L content.

[Embodiment 2]
Another embodiment of the content reproduction apparatus according to the present invention will be described with reference to FIG.

(Configuration of content playback apparatus 1002)
FIG. 3 is a block diagram showing a configuration of the content reproduction apparatus 1002. As shown in FIG. 3, the content reproduction apparatus 1002 includes a broadcast wave input unit 101, a content extraction unit 102, a viewing content selection unit 103, a content decoding display unit 104, a time shift reproduction content selection unit 110, and a time shift reproduction buffer. 111 and a playback content selection unit 112. Since the details of the broadcast wave input unit 101, the content extraction unit 102, the viewing content selection unit 103, and the content decryption display unit 104 have been described above, they are omitted here, the time shift playback content selection unit 110, and the time shift playback use. Details of the buffer 111 and the reproduction content selection unit 112 will be described later.

(Time shift playback content selection unit 110)
The time shift playback content selection unit 110 selects content to be recorded in the time shift playback buffer 111 for time shift playback from the input one-segment content and full segment content.

(Time shift playback buffer 111)
The time shift playback buffer 111 is a buffer for temporarily storing selected content in order to perform time shift playback. Of the data recorded in the time shift playback buffer 111, the fast forward playback data is deleted from the time shift playback buffer 111.

(Reproduction content selection unit 112)
The playback content selection unit 112 selects whether the content to be displayed is the content selected by the viewing content selection unit 103 or the content output from the time shift playback buffer 111.

(About time shift playback)
Here, the time-shifted reproduction means that the content decoding display unit 104 uses the data accumulated in the time-shift reproduction buffer 111 for temporary accumulation as the start data for fast-forward reproduction with the data having the most accumulated time as the start data. This is a playback method in which fast-forward playback (for example, 1.33 times playback) is performed until there is no data.

  Time shift playback is often used in the following situations. While the user is watching the TV broadcast, for example, when the user is away from a TV location to make a call or respond to a visitor and the TV broadcast cannot be viewed for a certain period of time, the content playback apparatus 1002 performs time-shifted playback. Temporary storage in the buffer 111 starts. When the user finishes a call or responds to the visitor and returns to the place where the television is located, the content reproduction apparatus 1002 performs time-shifted reproduction. As a result, the user can watch a broadcast broadcast for a certain period of time when he / she was away from the television and could not watch it, and then watch a broadcast broadcast in real time.

(Operation of Content Playback Device 1002)
When the broadcast wave input unit 101 receives the terrestrial digital broadcast, it outputs the terrestrial digital broadcast to the content extraction unit 102. The content extraction unit 102 extracts the one seg content and the full seg content from the terrestrial digital broadcast output by the broadcast wave input unit 101, and outputs them to the viewing content selection unit 103 and the time shift reproduction content selection unit 110. The viewing content selection unit 103 selects content to be viewed from the extracted one-segment content and full-segment content, and outputs the selected content to the reproduction content selection unit 112. Further, the time shift playback content selection unit 110 selects content to be recorded for time shift playback from the extracted one-segment content and full segment content, and outputs the content to the time shift playback buffer 111. The playback content selection unit 112 selects whether the content to be displayed is the content selected by the viewing content selection unit 103 or the content output from the time shift playback buffer 111, and the content is decoded and displayed. Output to the unit 104. The content decryption display unit 104 decrypts the content selected by the playback content selection unit 112 and outputs a signal obtained by the decryption to a monitor or the like.

(Advantages of content playback apparatus 1002)
As described above, the content reproduction apparatus 1002 can select different contents in the viewing content selection unit 103 and the time shift reproduction content selection unit 110. Thus, for example, when viewing full-seg content, the content to be recorded for time-shifted playback is set as one-seg content, so that one-seg content has a smaller amount of data than full-seg content. Long time data can be stored in the time shift reproduction buffer 111.

  In other words, as long as there is enough free space to record the one-segment content in the time-shift playback buffer 111, the user can watch a high-quality video of the full-segment content during normal viewing and can watch it for a long period of time. Even if the situation disappears, there is an advantage that all the parts that could not be viewed by time-shifted playback can be viewed as one-segment content. The certain time here means an elapsed time from the start of recording of full segment content to the time shift playback buffer 111 until there is no more free space for recording the full segment content in the time shift playback buffer 111. .

  Since the capacity that can be secured as a buffer for time shift playback changes according to the recording medium at that time or the free capacity of the built-in memory, the content selection unit 110 for time shift playback in the content playback apparatus 1002 according to the present embodiment. Controls to select full segment content as time-shifted content if the free space is greater than a certain value, and to select one-segment content as time-shifted content when the free space is less than a certain value May be.

  In the content playback apparatus 1002 according to this embodiment, an external removable recording medium may be connected to the content playback apparatus 1002 and the connected external removable recording medium may be used as the time shift playback buffer 111. In addition, when the time shift playback buffer 111 is an external removable recording medium, the time shift playback content selection unit 110 selects a full segment content as the content to be time shifted, and the time shift playback buffer 111 In the case of the built-in memory, one-seg content may be selected as content to be time-shifted reproduced.

  In addition, since there is a recording medium that has a small capacity or a low writing speed even if it is an external removable recording medium, the content selection unit 110 for time shift reproduction may select the type, capacity, or writing speed of the recording medium. Accordingly, it may be controlled to select full-segment content or one-segment content as content to be time-shifted reproduced.

<Modified example of content playback device>
A modification of the content reproduction apparatus according to the present invention will be described with reference to FIGS. 4 and 5. FIG.

(Configuration of content playback apparatus 1003)
FIG. 4 is a block diagram showing a configuration of the content reproduction apparatus 1003. As shown in FIG. 3, the content playback apparatus 1003 includes a broadcast wave input unit 101, a content extraction unit 102, a viewing content selection unit 103, a content decoding display unit 104, two time-shift playback buffers 111, and a playback content selection. The unit 112 is provided. Since the details of each member have been described above, they are omitted here.

(Operation of Content Playback Device 1003)
When the broadcast wave input unit 101 receives the terrestrial digital broadcast, it outputs the terrestrial digital broadcast to the content extraction unit 102. The content extraction unit 102 extracts the one seg content and the full seg content from the terrestrial digital broadcast output by the broadcast wave input unit 101, and outputs them to the viewing content selection unit 103. In addition, the content extraction unit 102 outputs the extracted one-segment content to one of the two time-shifted reproduction buffers 111 and the extracted full-segment content to the other of the two time-shifted reproduction buffers 111. The viewing content selection unit 103 selects content to be viewed from the extracted one-segment content and full-segment content, and outputs the selected content to the reproduction content selection unit 112. The playback content selection unit 112 selects whether the content to be displayed is the content selected by the viewing content selection unit 103 or the content output from the time shift playback buffer 111, and the content is decoded and displayed. Output to the unit 104. The content decryption display unit 104 decrypts the content selected by the playback content selection unit 112 and outputs a signal obtained by the decryption to a monitor or the like.

(Advantages of content playback apparatus 1003)
As described above, since the content reproduction apparatus 1003 includes the two time-shift reproduction buffers 111, there is an advantage that the one-segment content and the full-segment content can be combined into a content for time-shift reproduction.

  An example in which full-segment content and one-segment content are combined and used as content for time-shift playback will be described with reference to FIG.

  FIG. 5 shows changes in the amount of data stored in the full-segment content time-shift playback buffer 500 and the amount of data stored in the one-segment content time-shift playback buffer 501 during temporary storage. It is illustrated.

  As described above, since the full-segment content has a larger data amount than the one-segment content, the full-segment content time-shift playback buffer 500 having a storage capacity capable of recording the full-segment content for a long time without being overwritten is set as a mobile terminal. It is very expensive and difficult to prepare for. Therefore, a time shift playback buffer 501 for recording one segment content is recorded for a long time, and a time shift playback buffer 500 for recording full segment content is stored in a short time. Try to record minutes of content. For example, the full-segment content time-shift playback buffer 500 has a capacity capable of recording full-segment content for a maximum of 20 minutes, and the one-segment content time-shift reproduction buffer 501 has a capacity capable of recording one-seg content for a maximum of 60 minutes. And As already mentioned, the time-shift playback function is most effective when the user is unable to watch a part of the TV broadcast because he / she makes a call while watching the TV broadcast or leaves the terminal to respond to the visitor. Function. The transition of the data amount of the data stored in the time shift buffer 500 for full segment content and the time shift reproduction buffer 501 for one segment content in such a case will be described.

  FIG. 5A shows the state of the full-segment content time-shift playback buffer 500 and the one-segment content time-shift playback buffer 501 at the start of time-shift recording. Has not yet been stored. Here, time-shift recording means temporarily storing contents in a time-shift playback buffer for time-shift playback. When a user starts a telephone call while watching a television broadcast or leaves the terminal to respond to a visitor, the user instructs the content reproduction apparatus 1003 to perform temporary storage. The content extraction unit 102 records the content in the time shift playback buffer using this instruction as a trigger. As a result, the data is stored in the time shift reproduction buffer. Note that the content playback apparatus 1003 continues to display the content being viewed on the monitor while recording the content, or directly displays the video of the recording start portion of the content recorded in the time shift playback buffer for time shift playback. Still images may be displayed, or a screen indicating that time-shift recording is being performed may be displayed.

  FIG. 5B shows the state of the full-segment content time-shift playback buffer 500 and the one-segment content time-shift playback buffer 501 when 5 minutes have elapsed since the start of time-shift recording. In this state, the recording data 502 of the content of 5 minutes recorded for 5 minutes from the start of the time shift recording is stored in the time shift playback buffer 500 for full segment content and the time shift playback buffer 501 for one segment content, respectively. ing.

  FIG. 5C shows the state of the full-segment content time-shift reproduction buffer 500 and the one-segment content time-shift reproduction buffer 501 when 20 minutes have elapsed since the start of time-shift recording. The full-segment content time-shift playback buffer 500 and the one-segment content time-shift playback buffer 501 both record 20 minutes of recorded data 502. In this state, there is no more free space in the full-segment content time shift playback buffer 500 for recording more content. Therefore, in order to temporarily store data received thereafter, a part of the data stored in the full-segment content time-shift playback buffer 500 must be erased. In time-shift recording, when there is no more free space for recording content in the time-shift playback buffer, data with the oldest recorded time is overwritten.

  FIG. 5D shows the state of the time shift reproduction buffer 500 for full segment content and the time shift reproduction buffer 501 for one segment content when 25 minutes have elapsed since the start of time shift recording. Data received from 20 minutes to 25 minutes after the start of time-shift recording because there is no more free space for recording content in the full-segment content time-shift playback buffer 500 at the time of FIG. 5C. Is overwritten data 503 that overwrites the data portion recorded within 5 minutes from the start of time shift recording. Therefore, in the time shift playback buffer 500 for full segment content, the recorded data 502 recorded from 5 minutes to 20 minutes after the start of the time shift recording, and recorded from 20 minutes to 25 minutes after the start of the time shift recording. This means that there is 20 minutes of data in the overwritten data 503.

  On the other hand, since the one-segment content time-shift playback buffer 501 is provided with a 60-minute buffer, all of the 25-minute recorded data 502 recorded 25 minutes after the start of time-shift recording. Remaining.

  In the state of FIG. 5D, it is assumed that the user ends the call or returns to a place where the terminal is located so that the television broadcast can be watched and the time shift reproduction is started. In this example, it is assumed that time shift reproduction is performed at double speed. Since the data recorded at the time of the start of the time shift recording has only one segment content, the content reproduction apparatus 1003 starts time shift reproduction of the one segment content.

  FIG. 5E shows the state of the full-segment content time-shift playback buffer 500 and the one-segment content time-shift playback buffer 501 when 30 minutes have elapsed since the start of time-shift recording. Since time shift reproduction is performed from the time when 25 minutes have elapsed since the start of time shift recording, 5 minutes have elapsed since the start of time shift reproduction. In this example, since time-shifted reproduction is performed at a double speed, if the time-shifted reproduction is performed for 5 minutes, the data for 10 minutes, which is twice as much, is reproduced. Therefore, the data for the time shift playback for the one-segment content 501 includes data for 30 minutes after the start of the time shift recording. Among them, the data for 10 minutes after the start of the time shift recording is the reproduced data 504. Thus, data from 10 minutes to 30 minutes after the start of time shift recording becomes recorded data 502 that has not been reproduced yet.

  Focusing on the full-segment content time-shift playback buffer 500, since there is no area for storing data received from 25 minutes to 30 minutes after the start of time-shift recording, from 25 minutes to 30 minutes after the start of time-shift recording. The received data is stored by overwriting data recorded from 5 minutes to 10 minutes after the start of time shift recording. Therefore, the data recorded from 20 minutes to 30 minutes after the start of recording becomes the overwrite data 503, and the data recorded from 10 minutes to 20 minutes after the start of recording becomes the recorded data 502 that has not been reproduced yet. That is, the full-segment content time-shift playback buffer 500 includes 20 minutes of data recorded from 10 minutes to 30 minutes after the start of time-shift recording.

  As described above, at this point in time, the content playback apparatus 1003 plays back the data recorded 10 minutes after the start of time shift recording, but the data 10 minutes after the start of time shift recording is also the time shift playback data of the one-segment content. Both data for time-shifted reproduction of full segment content also exist. When the time-shifted playback data at a certain point exists in both the time-shift playback buffer of the one-segment content time-shift playback buffer 501 and the full-segment content time-shift playback buffer 500, the content playback device 1003 At that time, it is sufficient to reproduce the reproduction data for time shift of the full segment content with good image quality.

  Further, the content playback apparatus 1003 does not necessarily need to play back the full segment content when the full segment content buffer 500 includes the full segment content. For example, when the time shift recording is performed, the content playback device 1003 receives the full segment broadcast state. And the reception state of the one-segment broadcasting may be recorded separately, and the content having the better reception state in the portion to be time-shifted may be time-shifted and reproduced. Furthermore, in order to save power consumption when the remaining battery level of the content playback apparatus 1003 is below a certain value, or when the content playback apparatus 100 is battery-powered, the content playback apparatus 1003 performs time-shift playback of the one-segment content. May be.

  In addition, the content playback apparatus 1003 prompts the user when it reaches the point where both the one-seg content and the full-seg content exist during the time-shift playback of the data having only one of the one-seg content and the full-seg content. Alternatively, it is possible to present that both one-segment content and full-segment content exist, and to pause the time-shift reproduction until the user selects which content is to be time-shift reproduced. Further, instead of pausing the time-shifted reproduction until the user selects it, it is also possible to display only a menu for the user to select content.

  FIG. 5 (f) shows the state of the full-segment content time-shift playback buffer 500 and the one-segment content time-shift playback buffer 501 when 32 minutes have elapsed since the time-shift recording. Since the content playback apparatus 1003 performs time-shift playback after 25 minutes have elapsed since time-shift recording, 7 minutes have elapsed since the start of time-shift playback. In this example, since time-shifted reproduction is performed at a double speed, if data is reproduced for 7 minutes, the data corresponding to 14 times that is doubled is reproduced.

  Therefore, data recorded in the one-segment content time-shift playback buffer 501 is recorded 32 minutes after the start of the time-shift recording. Of these, data is recorded 14 minutes after the start of the time-shift recording. The data is reproduced data 504, and data recorded from 14 minutes to 32 minutes after the start of time-shift recording is recorded data 502 that has not been reproduced yet.

  In addition, in the time shift playback buffer 500 for full segment content, the data received from 30 minutes to 32 minutes after the start of time shift recording is the reproduced part recorded from 10 minutes to 12 minutes after the start of time shift recording. Therefore, the data recorded from 20 minutes to 32 minutes after the start of the time shift recording is overwritten data 503. Further, data recorded from 12 minutes to 14 minutes after the start of recording is reproduced data 504, and data recorded from 14 minutes to 20 minutes after recording is recorded data 502 that has not yet been reproduced. . That is, the data recorded from 12 minutes to 32 minutes after the start of the time shift recording exists in the full-segment content time shift playback buffer 500.

  In this example, the explanation is based on the premise that playback is started from the data recorded at the time when the time shift recording was started when performing time shift playback. However, the user selects the start point of the data to be time shifted playback. You may let them. At this time, as auxiliary information for determining the start point of the data to be time-shifted reproduced, a range in which full-segment content exists as data for time-shifted reproduction may be presented to the user.

  In addition, the content playback apparatus 1003 performs fast reverse playback in the reverse direction during time shift playback, or jumps to data recorded N seconds before the time when the currently played data is recorded. May be. However, even if the content playback apparatus 1003 is playing back the full segment content and tries to return in the reverse direction, there is a possibility that the content playback device 1003 may return to a period in which only the one-segment content exists as data for time shift playback. Specifically, as shown in (f) of FIG. 5, in the situation where the content playback apparatus 1003 is playing back the data of the full segment content recorded 14 minutes after the start of time shift recording, Even if an attempt is made to jump to data recorded 5 minutes before the recorded time, the reproduction data for full segment content recorded 9 minutes after the start of time shift recording is already overwritten, and there is only reproduction data for one segment content.

  As described above, when the content reproduction apparatus 1003 returns to the period in which only the one-segment content exists as the data for time-shift reproduction during the time-shift reproduction of the full segment content, the content reproduction device 1003 converts the data to be time-shifted reproduction into the one-segment content. The warning display indicating that only one-segment content exists as time-shifted playback data is displayed, and the user can select whether to perform time-shift playback of the one-segment content from the point of jump or cancel the jump. You may make it make it. Further, the process for returning to such a period may not be performed.

  Similarly, immediately before the time-shift playback buffer enters the state shown in FIG. 5E, the time-shift playback buffer has only one-segment content data as time-shift playback data. At this time, when the content playback apparatus 1003 performs fast reverse playback in the reverse direction or attempts to jump to data recorded N seconds before the currently recorded data is recorded, There may be a case where a point where there is no data for time shift reproduction is reached. In such a case, the content reproduction apparatus 1003 may display a warning display to that effect to the user, or may invalidate the process itself for returning to such a period.

  Further, the content playback apparatus 1003 has a function of jumping to the data recorded after N seconds from the time when the currently reproduced data was recorded as a part of the time shift playback function, and is currently playing back. When the data recorded M seconds after the time when the data was recorded (M <N) is the latest data recorded in the two time-shifted reproduction buffers 111, the currently reproduced data is It is not possible to jump to the data after N seconds from the recorded time. For example, in FIG. 6F, the data for time shift playback that has not yet been played back is only the data for 18 minutes 32 minutes after the start of time shift recording, but the content playback apparatus 1003 has time. Even if an attempt is made to jump to data after 20 minutes in a state where data 14 minutes after the start of shift recording is being reproduced, the jump cannot be executed. In such a case, the content playback apparatus 1003 may display a warning display to that effect to the user, or may not allow the process itself to jump to such a period.

  In addition, while the content playback apparatus 1003 is performing time-shift playback, fast-reverse playback, jumping N seconds before the time when the currently played data is recorded, or currently playing data is recorded. As a method for determining whether or not the time shift reproduction data is not reached by jumping from the recorded time to N seconds later, the time during which the time shift reproduction is actually performed is used. Alternatively, the determination may be made using the data amount of the data recorded in the time shift reproduction buffer 111.

  Also, if you try to perform fast reverse playback, jump to N seconds before the time when the currently playing data was recorded, or jump N seconds after the time when the currently playing data was recorded The method for dealing with the case where the section for which the data for shift reproduction does not exist is not limited to the modified example of the content reproduction apparatus according to the present embodiment shown in FIG. 4, but is applied to the content reproduction apparatus according to the present embodiment shown in FIG. Also applies.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

(Other configurations)
In addition, this invention is realizable also as the following structures.

(First configuration)
In a content playback apparatus capable of simultaneously receiving a plurality of contents of the same program,
A content selection unit for viewing that selects content to be viewed from the content of the plurality of the same programs;
A content decoding display unit for decoding and displaying the selected content to be viewed;
A content selection unit for recording that selects content to be recorded from the content of the plurality of the same programs;
A content recording unit for recording the selected content to be recorded on a recording medium;
By providing the above, a content playback device that can independently determine selection of content to be viewed and selection of content to be recorded.

(Second configuration)
The content playback apparatus according to the first configuration, wherein the recording content selection unit selects a content to be recorded in accordance with a recording medium to be recorded.

(Third configuration)
The content reproduction device according to the first configuration, wherein the viewing content selection unit selects content to be viewed according to a power source being used.

(Fourth configuration)
In a content playback apparatus capable of simultaneously receiving a plurality of contents of the same program,
A content selection unit for viewing that selects content to be viewed from the content of the plurality of the same programs;
A time-shift playback content selection unit for selecting content to be time-shifted playback from the plurality of content of the same program;
A buffer for time shift reproduction for temporarily storing the content to be subjected to the selected time shift reproduction;
A playback content selection unit for selecting whether to play back content to be viewed or content to be time-shifted,
By providing the above, a content playback apparatus that can independently determine selection of content to be viewed and selection of content for time-shift playback.

(Fifth configuration)
The content reproduction apparatus according to the fourth configuration, wherein the content selection unit for time shift reproduction performs selection of content for time shift reproduction according to a buffer amount that can be secured as a buffer for time shift reproduction.

(Sixth configuration)
In a digital content playback apparatus capable of simultaneously receiving a plurality of contents of the same program,
A content selection unit for viewing that selects content to be viewed from the content of the plurality of the same programs;
Time-shift playback buffers for the number of program contents that can be received simultaneously, temporarily storing content to be time-shifted,
A playback content selection unit for selecting which of the content to be viewed and a plurality of time shift playback content existing in the time shift playback buffer to play back;
And selecting the content to be viewed and selecting the content to be time-shifted playback independently, and at the time-shift playback time, depending on whether or not the content for time-shift playback exists, A content playback apparatus that determines which content is time-shifted.

(Program, recording medium)
Finally, each block included in the content reproduction apparatus 1000 (the content reproduction apparatus 1001, the content reproduction apparatus 1002, and the content reproduction apparatus 1003) may be configured by hardware logic. Alternatively, it may be realized by software using a CPU (Central Processing Unit) as follows.

  That is, the content reproduction apparatus 1000, the content reproduction apparatus 1001, the content reproduction apparatus 1002, and the content reproduction apparatus 1003 read the program code (execution format program, intermediate code program, source program) of a control program that realizes each function by a computer. It only has to be recorded as possible. The content playback device 1000, the content playback device 1001, the content playback device 1002, and the content playback device 1003 (or CPU or MPU) may read and execute the program code recorded on the supplied recording medium.

  The recording medium for supplying the program code to the content reproduction apparatus 1000, the content reproduction apparatus 1001, the content reproduction apparatus 1002, and the content reproduction apparatus 1003 is, for example, a tape system such as a magnetic tape or a cassette tape, a floppy (registered trademark) disk / Disk systems including magnetic disks such as hard disks and optical disks such as CD-ROM / MO / MD / DVD / CD-R, card systems such as IC cards (including memory cards) / optical cards, or mask ROM / EPROM / EEPROM / A semiconductor memory system such as a flash ROM can be used.

  Further, even if the content playback device 1000, the content playback device 1001, the content playback device 1002, and the content playback device 1003 are configured to be connectable to a communication network, the object of the present invention can be achieved. In this case, the program code is supplied to the content playback apparatus 1000, the content playback apparatus 1001, the content playback apparatus 1002, and the content playback apparatus 1003 via the communication network. The communication network is not limited to a specific type or form as long as it can supply program codes to the content playback apparatus 1000, the content playback apparatus 1001, the content playback apparatus 1002, and the content playback apparatus 1003. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, mobile communication network, satellite communication network, etc. may be used.

  The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, in the case of wired such as IEEE 1394, USB (Universal Serial Bus), power line carrier, cable TV line, telephone line, ADSL (Asymmetric Digital Subscriber Line) line, infrared such as IrDA or remote control, Bluetooth (registered trademark), 802. 11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, etc. can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  You can record content that has the same content as the content you want to watch but different format (compression rate, etc.), and even when the recording destination storage medium has insufficient free space, Since high-quality content with a low compression rate can be viewed, it is useful as a content reproduction apparatus and method for viewing, recording, and reproducing video and audio data.

It is a block diagram which shows the principal part structure of the content reproduction apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the principal part structure of the modification of the content reproduction apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the principal part structure of the content reproduction apparatus which concerns on another one Embodiment of this invention. It is a block diagram which shows the principal part structure of the modification of the content reproduction apparatus which concerns on another one Embodiment of this invention. It is a figure which shows the transition of the data amount of the data stored in the buffer for time shift reproduction | regeneration. It is a block diagram which shows the principal part structure of the conventional digital content reproduction apparatus.

Explanation of symbols

101 broadcast wave input unit 102 content extraction unit (content recording means for multiple time shift reproduction)
103 viewing content selection unit (reproduction content selection means, real-time reproduction content selection means)
104 Content decoding display unit 105 Recording content selection unit (recording content selection unit)
106 Content Recording Unit 110 Time Shift Playback Content Selection Unit (Time Shift Playback Content Selection Unit, Time Shift Playback Content Recording Unit)
111 Time-shift playback buffer 112 Playback content selection unit (playback content selection means)
1000 Content playback device 1001 Content playback device 1002 Content playback device 1003 Content playback device

Claims (14)

In a content playback apparatus capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
Playback content selection means for selecting at least one content from among the plurality of contents as playback content;
Content playback means for playing back the playback content;
A recording content selection means for selecting at least one content from among the plurality of contents as a recording content;
A content reproducing apparatus comprising: content recording means for recording the recording content on a recording medium. The playback content selection means selects the playback content according to the type of power source for operating the content playback device.
The content reproduction apparatus according to claim 1. The recording content selection unit selects the recording content according to a recording medium on which the recording content is recorded.
The content reproduction apparatus according to claim 1 or 2. The recording content selection unit selects the recording content according to a capacity of a recording medium on which the recording content is recorded.
The content reproduction apparatus according to claim 3. The recording content selection means selects the recording content according to a free space of a recording medium on which the recording content is recorded.
The content reproduction apparatus according to claim 3. The recording content selection unit selects the recording content according to a writing speed of a recording medium on which the recording content is recorded.
The content reproduction apparatus according to claim 3. In a content playback apparatus capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
Real-time playback content selection means for selecting at least one content as the real-time playback content from the plurality of contents;
Time shift playback content selection means for selecting at least one content from among the plurality of contents as time shift playback content;
Time-shift playback content recording means for recording the time-shift playback content on a recording medium;
Playback content selection means for selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
A content reproduction apparatus comprising content reproduction means for reproducing the reproduction content. The time-shift playback content selection means selects the time-shift playback content according to a free space of a recording medium for recording the time-shift playback content.
The content reproduction apparatus according to claim 7. In a content playback apparatus capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
Real-time playback content selection means for selecting at least one content as the real-time playback content from the plurality of contents;
A plurality of time-shift playback content recording means for recording each of the plurality of contents as time-shift playback content on each recording medium;
Playback content selection means for selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
A content reproduction apparatus comprising content reproduction means for reproducing the reproduction content. In a content reproduction method capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
A playback content selection step of selecting at least one content as the playback content from the plurality of contents,
A content playback step of playing back the playback content;
A recording content selection step of selecting at least one content as the recording content from the plurality of contents;
A content recording method comprising: a content recording step of recording the recording content on a recording medium. In a content reproduction method capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
A real-time playback content selection step of selecting at least one content as the real-time playback content from the plurality of contents;
A time-shift playback content selection step of selecting at least one content from among the plurality of contents as time-shift playback content;
A time-shift playback content recording step for recording the time-shift playback content on a recording medium;
A playback content selection step of selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
A content reproduction method comprising: a content reproduction step of reproducing the reproduction content. In a content reproduction method capable of simultaneously receiving a plurality of contents compressed in different forms from the same program,
A real-time playback content selection step of selecting at least one content as the real-time playback content from the plurality of contents;
A plurality of time shift playback content recording steps for recording each of the plurality of contents as time shift playback content on each recording medium; and
A playback content selection step of selecting at least one content as playback content from the real-time playback content and the time-shift playback content;
A content reproduction method comprising: a content reproduction step of reproducing the reproduction content.   A program for operating the content reproduction apparatus according to any one of claims 1 to 9, wherein the content reproduction program causes a computer to function as each of the above means.   A computer-readable recording medium on which the content reproduction program according to claim 13 is recorded.

Images