JP4893509B2 - Recording / playback device - Google Patents

Description

  The present invention relates to a recording / reproducing apparatus that has a randomly accessible recording medium and can be retroactively reproduced by temporarily recording a program being reproduced.

  In a recording / reproducing apparatus using a randomly accessible recording medium such as a hard disk, a recordable DVD (Digital Versatile Disc), or a semiconductor memory, it is possible to pause a program currently being broadcast or to reproduce it retroactively. Some have a function that can.

  In order to record a program being received, such a recording / playback device temporarily records the program being received by, for example, securing a certain amount of a dedicated temporary storage area on the recording medium or installing a dedicated memory. However, the above-described functions were realized by playing back.

  With respect to this type of recording / reproducing apparatus, Patent Documents 1 and 2 disclose techniques that enable recording of a program that is being received even after the reception channel is changed. Patent Document 3 discloses an apparatus capable of recording a program retroactively only for channels designated in advance. Furthermore, Patent Document 4 discloses a technique for realizing the above functions by providing two main and sub recording units.

  In such a recording / reproducing apparatus, the temporarily recorded content is automatically deleted by turning off the power of the apparatus. However, a technique for storing the temporarily recorded content without performing this automatic erasure has been proposed.

  For example, Patent Document 5 discloses that another area from the playback position at the time when the user gives a recording start instruction while continuing playback of the temporary storage area during time shift playback of the temporary storage area (always recording area or buffer area). A technique is disclosed in which the transfer is started and the normal recording content is stored up to the playback position when the user instructs to stop recording.

Patent Document 6 discloses a technique for simultaneously recording a reproduction signal on another medium from a reproduction position at the time when a user instructs to start recording.
JP 2000-184320 A Japanese Patent Laid-Open No. 2002-158956 JP 2003-101923 A JP 2005-269664 A JP-A-2005-32298 JP 2006-331576 A

  However, in the recording / reproducing apparatus disclosed in Patent Documents 1 to 6, it is necessary to provide a dedicated temporary storage area or another device for retroactively reproducing the program being reproduced.

  In the recording / playback apparatuses disclosed in Patent Documents 5 and 6, in order to store the temporarily recorded content, the user needs to directly specify the start position and end position of the section to be stored. This is no different from letting the user edit the recorded content. Further, since the process of transferring (copying) the content to another area or another medium is performed, the time required for this process becomes a waiting time for the user, which makes the user feel inconvenient.

  Furthermore, in the recording / reproducing apparatus of Patent Document 6, it is necessary to prevent operations such as playing back the buffer area during simultaneous recording on another medium. When this operation can be performed, a special playback video is recorded. Furthermore, there is a problem that the recording of another medium cannot be completed unless waiting for the buffer area to be reproduced to a desired position.

  In addition, the recording / reproducing apparatus of Patent Document 5 requires two simultaneous processes for both recording and reproduction, and Patent Document 6 requires high performance as a system because one reproduction process and two recordings occur simultaneously. The

  The present invention has been made in view of the above, and enables retroactive playback without a dedicated storage area or dedicated device for temporarily recording a program being received, and allows recording of a temporarily recorded program by a simple operation. It is an object of the present invention to provide a recording / reproducing apparatus that can be stored.

  In order to achieve the above object, the invention described in claim 1 is a channel selection means for selectively receiving a broadcast signal of a desired channel, program title name information of a plurality of programs scheduled to be broadcast in a predetermined period, and channel information. And an electronic program guide acquisition means for acquiring electronic program guide information including broadcast start / end time information from outside, and a program in a broadcast signal of a channel being received by the channel selection means is switched based on the electronic program guide information. Cache recording means for performing cache recording for temporarily recording each content divided by using at least one of the time points when the channel received by the channel selection means is switched, and the cache recording means Playback means for playing back the cache-recorded content immediately after the content is cache-recorded; A playlist generating unit that generates a playlist in which a plurality of pieces of content information including program title name information, channel information, and recording start / end time information for each content that has been cache-recorded by the cache recording unit; Based on an input backward reproduction instruction, the content corresponding to the plurality of pieces of content information registered in the playlist is recorded from a predetermined position cache-recorded in the past from the position currently reproduced by the reproduction means. When the recording instruction is input from the outside during the backward reproduction of the content corresponding to the content information registered in the playlist, the backward reproduction means for performing the backward reproduction to reproduce the content being reproduced from the cache recording And a recording storage means for changing to normal recording and storing That.

  According to a second aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, when the total amount of recorded data by the cache recording unit exceeds a preset temporary recording limit capacity, It further comprises erasure means for erasing in units of contents in order from the contents recorded in the cache recording order until the total does not exceed the temporary recording limit capacity.

  According to a third aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, when the total recording time by the cache recording unit exceeds a preset temporary recording time limit, the total recording time is The apparatus further includes an erasing unit that erases the content in units of content in order from the earliest in the order of the cache recording until the temporary recording time limit is not exceeded.

  According to a fourth aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, when the total amount of data recorded by the cache recording unit exceeds a preset temporary recording limit capacity, the temporary recording limit capacity It is further characterized by further comprising an erasing unit for erasing in units of contents in order from the contents recorded in the cache recording order until there is no content that is not included in the contents at all.

  According to a fifth aspect of the present invention, in the recording / reproducing apparatus according to the first aspect, when the total recording time by the cache recording unit exceeds a preset temporary recording time limit, the temporary recording time limit is exceeded. Further, it is characterized by further comprising an erasing means for erasing in units of contents in order from the contents recorded in the cache recording order in order until there is no content that is not included at all.

  According to a sixth aspect of the present invention, in the recording / reproducing apparatus according to any one of the first to fifth aspects, a recording instruction is externally issued during retroactive reproduction of content corresponding to the content information registered in the playlist. Is entered, the current recording recording of the program of the currently received channel, the recording storage of only the content that is currently being played back, and the recording storage of all the content that is currently cache recorded The image processing apparatus further includes selection screen generation / display means for generating and displaying a selection screen for selecting whether to save the recording.

  According to a seventh aspect of the present invention, in the recording / reproducing apparatus according to any one of the first to sixth aspects, the broadcast end time has elapsed at the present time using the electronic program guide information and the playlist. Among the programs, an electronic program guide screen generating / displaying means for generating and displaying an electronic program guide screen capable of selecting a program corresponding to the content recorded by the cache recording means, and displaying the electronic program guide screen And, when an instruction to select and store a program corresponding to the cache-recorded content is input, further includes means for changing and storing the content corresponding to the selected program from cache recording to normal recording. It is characterized by.

  According to an eighth aspect of the present invention, channel selection means for selectively receiving a broadcast signal of a desired channel, program title name information of a plurality of programs scheduled to be broadcast in a predetermined period, channel information, and broadcast start / end time information An electronic program guide acquisition means for acquiring electronic program guide information from outside, a point in time when a program in the broadcast signal of the channel being received by the channel selection means is switched based on the electronic program guide information, and the channel selection Cache recording means for performing cache recording for temporarily recording as one continuous content while recording mark information for designating a chapter at at least one time point when the channel received by the means is switched; Immediately after the content is cache-recorded by the cache recording means, the cache-recorded content is recorded. A play unit that registers a plurality of chapter identification information including a playback unit that plays a video, a program title name information for each chapter of the content cache-recorded by the cache recording unit, channel information, and recording start / end time information Based on a playlist generation means for generating a list and a backward reproduction instruction input from the outside, the reproduction means currently reproduces the chapters corresponding to the plurality of chapter identification information registered in the playlist. A backward reproduction means for performing backward reproduction from a predetermined position that has been cache-recorded in the past from a certain position, and a recording instruction from outside during the backward reproduction of the chapter corresponding to the chapter identification information registered in the playlist If entered, the chapter being played backward is changed from cache recording to normal recording and saved. Characterized in that it comprises a recording storage means for.

  According to a ninth aspect of the present invention, in the recording / reproducing apparatus according to the eighth aspect, when the total amount of recording data by the cache recording unit exceeds a preset temporary recording limit capacity, the recording data amount It further comprises erasure means for erasing in units of chapters in order from the chapter with the earliest cache recording order until the total does not exceed the temporary recording limit capacity.

  According to a tenth aspect of the present invention, in the recording / reproducing apparatus according to the eighth aspect, when the total recording time by the cache recording unit exceeds a preset temporary recording time limit, the total recording time is It further comprises erasure means for erasing data in units of chapters in order from the chapter with the earliest cache recording order until the temporary recording time limit is not exceeded.

  According to an eleventh aspect of the present invention, in the recording / reproducing apparatus according to the eighth aspect, when the total amount of data recorded by the cache recording unit exceeds a preset temporary recording limit capacity, the temporary recording limit capacity It is further characterized by further comprising an erasing unit for erasing in units of chapters in order from the chapter having the earliest cache recording order until there are no chapters included in the chapter.

  According to a twelfth aspect of the present invention, in the recording / reproducing apparatus according to the eighth aspect, when the total recording time by the cache recording unit exceeds a preset temporary recording time limit, It is further characterized by further comprising an erasing unit for erasing in units of chapters in order from the chapter with the earliest cache recording order until no chapters are included in the list.

  According to a thirteenth aspect of the present invention, in the recording / reproducing apparatus according to any one of the eighth to twelfth aspects, when a recording instruction is input from the outside during the backward reproduction of the chapter registered in the playlist. Whether to save the current recording of the program of the channel currently being received, the recording of only the chapter currently being played back, or the recording of all the chapters currently cached It further comprises selection screen generation display means for generating and displaying a selection screen for selection.

  According to a fourteenth aspect of the present invention, in the recording / reproducing apparatus according to any one of the eighth to thirteenth aspects, the broadcast end time has elapsed at the present time using the electronic program guide information and the playlist. Among the programs, an electronic program guide screen generating / displaying means for generating and displaying an electronic program guide screen capable of selecting a program corresponding to each chapter in the content cache-recorded by the cache recording means, and the electronic program guide When an instruction to select and save a program corresponding to a chapter in the content that has been cache-recorded is input while the screen is displayed, the chapter corresponding to the selected program is changed from cache recording to normal recording. And storing means.

  According to the recording / playback apparatus of the present invention, it is possible to perform backward playback without providing a dedicated storage area or a dedicated device for temporarily recording a received program, and record and store the temporarily recorded program by a simple operation. be able to.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the recording / reproducing apparatus according to the embodiment of the present invention receives a broadcast signal of a desired channel and obtains a received signal, and encodes the received signal by an encoding method such as MPEG. An encoder 2, a digital video recorder (DVR) 3 having a randomly accessible recording medium such as a hard disk or DVD-RW for recording the encoded data, a decoder 4 for decoding the encoded data, An EPG analyzer 5 that acquires and analyzes electronic program guide information from a signal superimposed on a vertical blanking interval (VBI) of an analog broadcast wave, and a virtual play in which content information of a cache-recorded content is registered in the DVR 3 Content information management unit 6 that generates a list (VPL) and holds it, and an on-screen display And b (OSD) 7, is configured with a central processing unit (CPU) 8, and is connected to the TV monitor 9. The CPU 8 comprehensively controls each unit provided in the apparatus.

  The electronic program guide information may be acquired from SI (Service Information) data included in the digital broadcast signal or may be acquired from the Internet. The electronic program guide information includes program title name information, genre code information, channel information, broadcast start / end time information, and the like of each broadcast program.

  Next, the operation of the recording / reproducing apparatus configured as described above will be described. First, the operation during recording will be described. The analog broadcast signal of the desired channel selected by the tuner 1 under the control of the CPU 8 is frequency-converted to a received signal in the baseband and supplied to the encoder 2, where the desired channel is encoded by a moving picture coding method such as MPEG. After being encoded into a digital video signal of a broadcast program, it is written to DVR 3. When a digital broadcast signal is received by a digital tuner (not shown), the received stream is recorded in the DVR 3 as it is, or down-converted and recorded in the DVR 3.

  Next, the operation during reproduction will be described. The digital video signal read from the DVR 3 under the control of the CPU 8 is returned to the video signal of the broadcast program of the desired channel by the decoder 4 and added to the operating state by the OSD 7 and then output to the television monitor 9. Watched. Further, the EPG analyzer 5 acquires electronic program guide information from VBI of an analog broadcast signal, SI data of a digital broadcast signal, or the Internet, analyzes the data content, and displays it on the OSD 7 in a display format such as a program guide. . The user can select an arbitrary broadcast program by remote control operation, and set or cancel recording reservation on the screen.

  In the recording / reproducing apparatus according to the present embodiment, a recording operation is always performed without receiving a recording reservation operation and a normal recording operation during reception and reproduction of a channel selected by a user operation. Hereinafter, this recording operation is appropriately referred to as cache recording. By playing back the cache-recorded portion, it becomes possible for the user to return to the screen on which the user wants to check the program being viewed, or to check the screen by pausing. In addition, it is possible not to make a reservation recording and view later, but to view the broadcast again when the user leaves the seat by telephone or other purpose during real-time viewing.

  Here, the operation at the time of cache recording of the recording / reproducing apparatus according to the present embodiment will be described. FIG. 2 is a flowchart showing an operation at the time of cache recording of the recording / reproducing apparatus according to the present embodiment.

  First, in step S110, the CPU 8 causes the encoder 2 to encode the broadcast signal of the channel received by the tuner 1 together with the start of the recording / reproducing apparatus, and records the encoded data in the DVR 3. Here, the encoded data recorded in the DVR 3 is read out immediately after recording, returned to the video signal of the broadcast program of the reception channel by the decoder 4, output to the TV monitor 9 via the OSD 7, and viewed by the user. Is done.

  Next, in step S120, the CPU 8 determines whether or not to end the cache recording based on an instruction input by a user's remote control operation. Here, the CPU 8 determines to end the cache recording when an instruction to turn off the power of the recording / reproducing apparatus or an instruction to stop the cache recording function is input. When the cache recording is stopped (step S120: YES), the process proceeds to step S190, and when the cache recording is not stopped (step S120: NO), the process proceeds to step S130.

  In step S130, the CPU 8 determines whether or not the received program has been switched to another program. Here, when the CPU 8 detects from the electronic program guide information that the reception channel is the same but the program has changed over time, or when the reception channel is switched based on a channel switching instruction based on a user's remote control operation, It is determined that the program has been switched to another program. If the program has been switched to another program (step S130: YES), the process proceeds to step S140. If the program has not been switched to another program (step S130: NO), the process proceeds to step S160.

  In step S140, the CPU 8 causes the DVR 3 to record the switched program as another content. FIG. 3 is a conceptual diagram showing a content recording state. The contents A to D shown in FIG. 3 are delimited at the time of program switching within the same channel over time or at the time of program switching due to switching of reception channels.

  Note that mark information for dividing into chapters at the time of program switching may be recorded while recording as one continuous content regardless of program switching when cache recording. In this case, the processing performed in units of contents in the following description can be replaced with the processing in units of chapters.

  To each content recorded in the DVR 3, program title name information, genre code information, channel information, recording start / end time information and the like are added, and information indicating the recording type of the content is also added. The information indicating the recording type indicates whether or not the content is cache-recorded. For example, “1” is set for cache recording, and “0” is set for normal recording other than cache recording. .

  In addition, the content information management unit 6 calculates the data amount of each content and the length (time) of each content recorded in the DVR 3 for each content, and holds the result. Further, the content information management unit 6 acquires the address on the recording medium in the DVR 3 of each content recorded in the DVR 3 and holds this.

  Next, in step S150, the CPU 8 stores content information including program title name information, genre code information, channel information, recording start / end time information, etc. for the new content cache-recorded in step S140 in a virtual playlist (VPL). The content information management unit 6 is controlled so as to be additionally registered. Information such as program title name information is acquired from the electronic program guide information held in the EPG analyzer 5.

  The virtual playlist is generated and held by the content information management unit 6 as a temporary playlist in which content information for each cache-recorded content is registered, and the contents A, B,... Are recorded in the DVR 3. Updated every time it is done. When the cache-recorded content is played back retroactively, it can be played back seamlessly regardless of program switching or the like by playing back according to the virtual playlist.

  Next, in step S160, the CPU 8 refers to the content information management unit 6 and determines whether or not the total data amount of all the contents recorded in the DVR 3 by the cache recording exceeds a preset temporary recording limit. Judging. If the temporary recording limit is exceeded (step S160: YES), the process proceeds to step S170, and if the temporary recording limit is not exceeded (step S160: NO), the process returns to step S120 and the subsequent processing is repeated.

  In step S <b> 170, the CPU 8 erases the content in units of content in order from the earliest in the cache recording order until the total amount of data of the cache recorded content in the DVR 3 does not exceed the temporary recording limit. In the example shown in FIG. 3, the content A is deleted because a part of the content A exceeds the temporary recording limit 21.

  It should be noted that until the content that is not included in the temporary recording limit is exhausted, the cached content may be deleted in order from the earliest. In this case, in the example of FIG. 3, the content A is not erased, and if there is content that has been cache-recorded before the content A, the content is erased.

  In addition, the temporary recording limit is not set by the data amount as described above, but is set by the recording time limit, and it is determined whether the total recording time of the content exceeds the temporary recording limit. May be.

  Next, in step S180, the CPU 8 controls the content information management unit 6 so as to delete the content information corresponding to the content deleted in step S170 from the virtual playlist.

  If it is determined in step S120 that the cache recording is to be stopped, the CPU 8 stops the cache recording in step S190, and the information indicating the recording type is “1” in the content recorded in the DVR 3 in step S200. Erase content.

  In step S210, the CPU 8 controls the content information management unit 6 so as to delete the virtual playlist.

  In this embodiment, when performing playback while performing cache recording as described above, by specifying the position where the cache recording was performed in the past from the position where the current playback is being performed, the backward playback is performed starting from that position. It can be performed. During this retroactive playback, if you change your mind to watch later, or if you are unable to watch it for some reason, or if the user thinks that you want to save the program as a favorite, the cached recording is used. The procedure for recording and saving will be described.

  FIG. 4 is a flowchart showing a procedure for recording and storing the cache-recorded content. In step S310, when a recording instruction by a user operation is input during playback of the recorded content, the CPU 8 performs normal recording based on the information indicating the recording type added to the content recorded in the DVR 3 in step S320. It is determined whether or not the content is being reproduced. When the normal recording content is being played back (step S320: YES), the playback is continued as it is. When the normal recording content is not being played back (step S320: NO), the process proceeds to step S330.

  In step S330, the CPU 8 determines whether or not the cache-recorded content is being played back based on the information indicating the recording type and the virtual playlist. In the case where the retro play is being performed (step S330: YES), in step S340, the CPU 8 changes the information indicating the recording type of the content being retro play from “1” to “0”.

  After this, when the cache recording is discarded, for example, by turning off the power of the apparatus, the content whose recording type information is “1” is deleted and the virtual playlist is also deleted. Content whose information is changed from “1” to “0” is not erased and can be recorded and saved.

  When the playback is not being performed backward (step S330: NO), in step S350, the CPU 8 causes the encoder 2 to encode the broadcast signal of the channel received by the tuner 1 as normal recording, and the encoded data is encoded. Record in DVR3.

  As described above, the recording / reproducing apparatus of the present embodiment caches each content divided by dividing at least one of the time point when the program of the channel being received is switched and the time point when the channel being received is changed. A virtual play list in which content information including program title name information and the like for each content recorded and cache recorded is registered. By playing back according to this virtual play list, it is possible to play back seamlessly regardless of program switching or the like. In addition, cache recording can be performed using a recording area used for normal recording without providing a dedicated area or a dedicated device for the recording medium.

  In addition, when a recording instruction is input from the outside during backward playback, the content being played back is changed from cache recording to normal recording and saved, so the cached content can be recorded and saved in a short time with a simple operation. be able to.

  If a recording instruction is input during retroactive playback of cache-recorded content, recording of the currently received channel's program from the current recording, recording and storage of only the content currently being retroactively played back, and cache recording at the current time are performed. A selection screen for selecting which of the recorded recordings of all contents to be recorded may be generated by the CPU 8 and displayed via the OSD 7.

  In this case, when an instruction to record and save the program of the currently received channel from the current time is input, the CPU 8 encodes the broadcast signal of the channel received by the tuner 1 by the encoder 2 as normal recording. The encoded encoded data is recorded in the DVR 3. In addition, when an instruction to record and save only the content being played back is input, the CPU 8 changes the information indicating the recording type of the content being played back from “1” to “0”, thereby performing normal recording. Change to content. When an instruction to record and save all the contents that are currently cache-recorded is input, the CPU 8 changes the information indicating the recording type of all the contents that are cache-recorded from “1” to “0”. By changing, it changes to the content of normal recording.

  By doing in this way, a user's choice with respect to recording preservation | save can be increased, and a user's intention can be reflected.

  Further, by using the electronic program guide information and the playlist, the CPU 8 generates an electronic program guide screen capable of selecting a program corresponding to the cache-recorded content among the programs whose broadcast end time has elapsed at present, You may enable it to display via OSD7.

  When an instruction to select and store a program corresponding to the cache-recorded content is input while the electronic program guide screen is displayed, the CPU 8 selects the recording type of the content corresponding to the selected program. By changing the indicated information from “1” to “0”, it is changed to the content of normal recording.

  Normally, the electronic program guide is displayed so that past programs are not displayed or grayed out and cannot be selected, but the program corresponding to the cache-recorded content can be selected by the electronic program guide screen as described above. Thus, even a past program can be recorded and saved by the same operation as a normal recording reservation.

It is a block diagram which shows the structure of the recording / reproducing apparatus which concerns on embodiment of this invention. 3 is a flowchart showing an operation at the time of cache recording of the recording / reproducing apparatus shown in FIG. 1. It is a conceptual diagram which shows the recording state of a content. 3 is a flowchart showing a procedure for recording and saving a cache-recorded content in the recording / reproducing apparatus shown in FIG. 1.

Explanation of symbols

1 Tuner 2 Encoder 3 Digital Video Recorder (DVR)
4 Decoder 5 EPG Analyzer 6 Content Information Management Unit 7 On-Screen Display (OSD)
8 CPU
9 TV monitor

Claims (14)

Channel selection means for selectively receiving a broadcast signal of a desired channel;
Electronic program guide acquisition means for acquiring electronic program guide information including program title name information, channel information, and broadcast start / end time information of a plurality of programs scheduled to be broadcast in a predetermined period;
Based on the electronic program guide information, at least one of the time point when the program in the broadcast signal of the channel being received by the channel selection unit is switched and the time point when the channel received by the channel selection unit is switched is used as a delimiter. Cache recording means for performing cache recording for temporarily recording each divided content;
Playback means for playing back the cache-recorded content immediately after the content is cache-recorded by the cache recording means;
Playlist generating means for generating a playlist in which a plurality of pieces of content information including program title name information, channel information, and recording start / end time information for each content cache-recorded by the cache recording means are registered;
Based on a backward playback instruction input from the outside, the content corresponding to the plurality of pieces of content information registered in the playlist has been cache-recorded in the past from the position where the playback unit is currently playing back A backward playback means for performing backward playback from a position;
Recording storage means for changing the content being played back from the cache recording to the normal recording when the recording instruction is input from the outside during the backward playback of the content corresponding to the content information registered in the playlist And a recording / reproducing apparatus.   When the total amount of data recorded by the cache recording unit exceeds a preset temporary recording limit capacity, the order of the cache recording is performed until the total recording data amount does not exceed the temporary recording limit capacity. The recording / reproducing apparatus according to claim 1, further comprising an erasing unit that erases content by content in order from the earliest content.   If the total recording time by the cache recording means exceeds a preset temporary recording time limit, the cache recording order is early until the total recording time does not exceed the temporary recording time limit. The recording / reproducing apparatus according to claim 1, further comprising an erasing unit that erases content in order from the content.   If the total amount of data recorded by the cache recording means exceeds a preset temporary recording limit capacity, the contents recorded in the cache recording order from the earliest until there is no content that is not included in the temporary recording limit capacity. The recording / reproducing apparatus according to claim 1, further comprising an erasing unit for sequentially erasing in units of contents.   When the total recording time by the cache recording means exceeds a preset temporary recording time limit, the content that has been recorded in the cache is in order from the earliest until there is no content included in the temporary recording time limit. 2. The recording / reproducing apparatus according to claim 1, further comprising erasing means for erasing in units of contents.   When a recording instruction is input from the outside during the backward playback of the content corresponding to the content information registered in the playlist, the recording of the program of the currently received channel is recorded and saved from the current time. A selection screen generation and display means for generating and displaying a selection screen for selecting which recording storage is to be performed among recording and storage of only the current recording, and recording and storage of all content currently cached. The recording / reproducing apparatus according to claim 1, wherein: Using the electronic program guide information and the playlist, an electronic program guide screen capable of selecting a program corresponding to the content recorded by the cache recording means from among the programs whose broadcast end time has elapsed at the present time Electronic program guide screen generation and display means for generating and displaying;
When an instruction to select and save a program corresponding to the cache-recorded content is input while the electronic program guide screen is displayed, the content corresponding to the selected program is changed from cache recording to normal recording. The recording / reproducing apparatus according to claim 1, further comprising: Channel selection means for selectively receiving a broadcast signal of a desired channel;
Electronic program guide acquisition means for acquiring electronic program guide information including program title name information, channel information, and broadcast start / end time information of a plurality of programs scheduled to be broadcast in a predetermined period;
At least one of the time point when the program in the broadcast signal of the channel being received by the channel selection unit is switched based on the electronic program guide information and the time point when the channel received by the channel selection unit is switched Cache recording means for performing cache recording to record temporarily as one continuous content while recording mark information for designating
Playback means for playing back the cache-recorded content immediately after the content is cache-recorded by the cache recording means;
Playlist generation means for generating a playlist in which a plurality of chapter identification information including program title name information, channel information, and recording start / end time information for each chapter of the content cache-recorded by the cache recording means is registered. When,
Based on a backward playback instruction input from the outside, the chapter corresponding to the plurality of chapter identification information registered in the playlist has been cache-recorded in the past from the position where the playback means is currently playing back A backward reproduction means for performing backward reproduction from a predetermined position;
When a recording instruction is input from the outside during the backward playback of the chapter corresponding to the chapter identification information registered in the playlist, the recording is saved by changing the chapter being played back from the cache recording to the normal recording. And a recording / reproducing apparatus.   When the total amount of data recorded by the cache recording unit exceeds a preset temporary recording limit capacity, the order of the cache recording is performed until the total recording data amount does not exceed the temporary recording limit capacity. 9. The recording / reproducing apparatus according to claim 8, further comprising erasing means for erasing in units of chapters in order from the earliest chapter.   If the total recording time by the cache recording means exceeds a preset temporary recording time limit, the cache recording order is early until the total recording time does not exceed the temporary recording time limit. 9. The recording / reproducing apparatus according to claim 8, further comprising erasing means for erasing the chapters in order from the chapters.   If the total amount of data recorded by the cache recording means exceeds a preset temporary recording limit capacity, the chapters in which the cache recording order is early are reduced until there are no chapters included in the temporary recording limit capacity. 9. The recording / reproducing apparatus according to claim 8, further comprising an erasing unit that sequentially erases the data in units of chapters.   When the total recording time by the cache recording means exceeds a preset temporary recording time limit, the chapters in which the cache recording is performed in order from the earliest until there are no more chapters included in the temporary recording time limit. 9. The recording / reproducing apparatus according to claim 8, further comprising erasing means for erasing in units of chapters.   When a recording instruction is input from the outside during the backward playback of the chapter corresponding to the chapter identification information registered in the playlist, the recording of the program of the currently received channel is recorded and saved from the current time. There is further provided a selection screen generation display means for generating and displaying a selection screen for selecting which recording is to be performed among the recording storage of only the chapter and the recording storage of all the chapters currently cached. The recording / reproducing apparatus according to any one of claims 8 to 12, Using the electronic program guide information and the playlist, it is possible to select a program corresponding to each chapter in the content cache-recorded by the cache recording means from among the programs whose broadcast end time has elapsed at the present time Electronic program guide screen generation and display means for generating and displaying an electronic program guide screen;
When an instruction to select and store a program corresponding to a chapter in the content that has been cache-recorded is input while the electronic program guide screen is being displayed, the chapter corresponding to the selected program is normally stored from the cache recording. The recording / reproducing apparatus according to any one of claims 8 to 13, further comprising means for changing to a recording and storing the recording.

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