JP2005158155A - Data recording and reproducing device, and data processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To start reproduction from data recorded previously most in a data group being reproducing by only simple operation. <P>SOLUTION: An apparatus detects that a user performs one-touch operation of a reproduction key (S5) during reproducing a program file recorded in a HDD and displaying it on a display (S1), the apparatus displays such a message on the display that reproduction is started from initial data of the program file (S7). After that, in the apparatus, a read-out head is moved (skip) at once to a position of the first data of the program file (a last recorded data), after finish of movement, read-out/reproduction is started from moved data. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a data recording / reproducing apparatus and a data processing apparatus, and more particularly to a data recording / reproducing apparatus and a data processing apparatus having at least a function of reproducing data on a disk-shaped recording medium.

  In a disk recording / reproducing apparatus using an HDD (hard disk drive) or the like, when a skip up key / skip down key is continuously pressed to reproduce information from a desired recording position, information on the selected track is displayed. Has been proposed (see Patent Document 1).

In addition, a device has been proposed that makes it possible to perform stable time-shift recording and reproduction by eliminating the need to specify the reproduction start position during time-shift recording and reproduction related to so-called chasing reproduction and reducing the waiting time until reproduction starts (patent) Reference 2).
JP 2003-100068 A JP 2000-113500 A

  In the former prior art described above, the playback position continues to move forward (fast forward) or backward (fast reverse) in accordance with the track direction while the skip up key or skip down key is kept pressed. . Therefore, in order to move the playback position to the beginning position (or recording start position) of the recording area, the skip up key or the skip down key must be kept pressed, and the operability is not excellent.

  In the latter conventional technique described above, when recording is started in the time shift region, the recording head moves to the recording start position, and the reproducing head moves to the vicinity thereof. When the recording head moves to the recording start position, the recording operation starts. When the reproducing head finishes moving, the recording head waits, and when a playback instruction (instruction by the chasing playback button operation) is input, playback starts from that position. Start operation.

  Therefore, the playback head moves to the vicinity of the recording start position in response to the operation of the recording button at the start of time-shift recording, and when the chasing playback button is subsequently operated, the vicinity of the previous recording start position that has been moved in advance. In order to perform chasing playback from the recording start position, such as starting playback from the beginning, the user has to perform at least two button operations.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a data recording / reproducing apparatus and a data processing apparatus capable of starting reproduction from the most recently recorded data of a reproduction target data group with a simple operation.

A data recording / reproducing apparatus having at least a function of reproducing data including video from a disk-shaped recording medium according to an aspect of the present invention,
An operation means having a plurality of keys operated from the outside and inputting an instruction according to the key operation;
Reading means for reading data for reproduction from a data group recorded in time series on a recording medium;
When the data is read by the reading means, the reading means records the reading means the earliest in the data group in response to the operation means inputting a predetermined instruction by operating a predetermined key of the plurality of keys. Read control means for controlling to start reading from the read data;
Means for notifying that reading is started from the most recently recorded data of the data group when a predetermined instruction is input when data is read by the reading means;
Writing means for writing given data to a recording medium;
Receiving means for receiving a broadcast signal;
Data extraction means for extracting data based on a desired program broadcast signal from the broadcast signal received by the reception means and outputting to the writing means;
Read control means
While the data for the data group is written by the writing means, the reading means controls to read the data from the data group,
The data group is written to a predetermined area of the recording medium by the writing means,
The predetermined area is either a recording area for recording and storing a data group or a temporary storage area for temporarily storing a data group,
Read control means
When the predetermined area is a recording area, the reading means controls the data to be read from the recording area while the data is recorded in the recording area by the writing means. When the predetermined area is the temporary storage area, the data is read by the writing means. While being stored in the temporary storage area, the reading means controls to read data from the temporary storage area,
When the recording medium has a temporary storage area and a recording area for recording and storing data, the data is written to the temporary storage area by the writing means except when the data is written to the recording area.

A data processing apparatus according to another aspect of the present invention is a data processing apparatus having at least a function of reproducing data including video from a disk-shaped recording medium,
An operation means having a plurality of keys operated from the outside and inputting an instruction according to the key operation;
Reading means for reading data for reproduction from a data group recorded in time series on a recording medium;
When the data is read by the reading means, the reading means records the reading means the earliest in the data group in response to the operation means inputting a predetermined instruction by operating a predetermined key of the plurality of keys. Read control means for controlling to start reading from the read data.

  Accordingly, even when data is read from the data group of the recording medium by the reading means and being reproduced, when the predetermined key of the operating means is operated, the reading control means accordingly sets the reading means to be the most in the data group to be reproduced. Switch to start reading from previously recorded data.

  Therefore, the user can quickly start the reproduction from the first (first) data in the time series of the data group being reproduced simply by operating the predetermined key.

  Preferably, the apparatus further comprises writing means for writing given data to the recording medium, and the reading control means writes data from the data group by the reading means while data for the data group is written by the writing means. Control to read.

  Therefore, in a situation where data is being reproduced while being written to the data group, the reproduction can be started from the first (first) data of the data group being reproduced simply by operating the predetermined key as described above.

  Preferably, the data group is written into a predetermined area of the recording medium by a writing unit. Therefore, the data group to be reproduced can be data recorded in a predetermined area of the recording medium.

  Preferably, the predetermined area is a recording area for recording and storing a data group, and the reading control means reads the data from the recording area by the reading means while the data is recorded in the recording area by the writing means. It has a means to control.

  Therefore, in the situation where data for storage is being recorded in the recording area and data is being reproduced from the recording area, the first of the data group in the recording area being reproduced (by simply operating the predetermined key as described above) Playback can be started from the first data.

  Preferably, the predetermined area is a temporary storage area for temporarily storing a data group, and the reading control means reads the data from the temporary storage area by the reading means while the data is stored in the temporary storage area by the writing means. It has time shift means for controlling the output.

  Therefore, even when the data group stored in the temporary storage area is written and read out in parallel by the time shift means, the data in the temporary storage area can be maintained while operating as it is by simply operating the predetermined key as described above. It is possible to switch to start reproduction from the first (first) data of the group.

  Therefore, even if the data group is reproduced from the recording area or the temporary storage area and the user leaves the scene while displaying the video, the user can quickly start the data group by operating the predetermined key when returning. From (most recently recorded) data can be played back and displayed.

  Preferably, the recording medium has a temporary storage area and a recording area for recording and storing data, and the data is written to the temporary storage area by the writing means except when the data is written to the recording area. It is.

  Therefore, data is written to the temporary storage area except during an operation mode period in which data for storage is written to the recording area.

  Preferably, the apparatus further includes means for notifying that reading is started from the data recorded most recently in the data group when a predetermined instruction is input when the data is read by the reading means.

  Therefore, the user can confirm that the predetermined key operation is accepted and the reading is started from the data recorded most recently in the data group by confirming the notified content.

  Preferably, the apparatus further includes receiving means for receiving a broadcast signal, and data extracting means for extracting data based on a desired program broadcast signal from the broadcast signal received by the receiving means and outputting the data to the writing means. .

  Therefore, a series of features as described above can be obtained when playback is performed on a data group of a broadcast program.

  Preferably, the reading means is a data reading head, and in response to inputting a predetermined instruction, the reading control means moves the head from the current position to the recording position of the most recently recorded data. (Skip) may be performed.

  According to the invention, the user can start playback from the first (most recently recorded) data in the time series of the data group being played, by operating the predetermined key.

  Embodiments of the present invention will be described below with reference to the drawings. Here, for the sake of simplicity, video data is used as data to be recorded and reproduced. However, the present invention is not limited to this, and other data such as audio data may be used.

  FIG. 1 shows the configuration of a video recording / reproducing apparatus 100 according to an embodiment of the present invention. FIG. 2 shows an example of a processing procedure according to the present embodiment. FIG. 3 is a schematic diagram for explaining the reproduction position in the recording area according to the embodiment of the present invention. FIG. 4 shows an example of a message displayed in the embodiment of the present invention.

  In FIG. 1, a video recording / reproducing apparatus 100 is connected to a display 200 such as a TV (television) receiver prepared in advance. The video recording / reproducing apparatus 100 includes a system control circuit 10 including a microcomputer (not shown) for centrally controlling and monitoring each unit of the apparatus, a tuner 11 that receives a broadcast signal via an antenna, a hard disk device 12, An MPEG (motion picture experts group) encoder 14, an MPEG decoder 17, a selector 18, an OSD (on screen display) image generation circuit 19, and an operation device 22 are provided.

  The system control circuit 10 has a memory 10A. The memory 10A has areas E1 and E2. A control flag FL for controlling the operation is stored in the area E1, and data POD indicating the position of the reproduction head is stored in the area E2.

  The hard disk device 12 includes a hard disk 120, a write head 12W for accessing information about the hard disk 120, and a read head 12R. The operation device 22 has a plurality of types of keys including a reproduction key 221 and a stop key 222 which are provided on the front surface of the video recording / reproducing device 100 and the like to be operated by the user to give instructions. Here, the operation device 22 is provided on the front surface of the panel of the video recording / reproducing device 100, but may be provided on the operation surface of a separate controller for remote operation.

  In operation, a broadcast signal received via an antenna is provided to the tuner 11. The tuner 11 extracts a broadcast signal of a desired channel instructed from the system control circuit 10 from the received signal, the video signal of the extracted signal is sent to the MPEG encoder 14, and other information M1 is sent to the hard disk device 12 and the system control circuit 10. Output each. Information M1 includes information related to broadcasting such as a program guide. Thus, the channel desired by the user is acquired when the user performs channel designation operation on the operation device 22 and the designation information is given to the system control circuit 10.

  The MPEG encoder 14 encodes the input video signal so that the data can be processed, and outputs the encoded video data to the system control circuit 10 and the hard disk device 12 as video data M2. The hard disk device 12 operates under the control of the system control circuit 10 and writes video data M2 and information M1 given to the hard disk 120 by the write head 12W. Further, the video data and the like are read from the hard disk 120 by the read head 12R and output to the system control circuit 10 and the MPEG decoder 17 as read data RM. An instruction for controlling the operation mode (recording mode, reproduction mode, etc.) of the hard disk device 12 can be given by operating the operation device 22 by the user.

  It is assumed that video data is given to the MPEG decoder 17 as read data RM. When the video data is input, the MPEG decoder 17 encodes and outputs the video signal DA that can be displayed on the display 200. The OSD image generation circuit 19 generates an image based on data input from the system control circuit 10 and outputs an image signal DC. The system control circuit 18 receives the image signal DC and the video signal AV, and selectively receives either of them under the control of the system control circuit 10 and outputs it to the display 200. The display 200 displays a screen based on the supplied image signal DC or video signal DA.

  In the present embodiment, the video recording / reproducing apparatus 100 records in order to save program data in a predetermined unit such as a file unit in the recording area of the hard disk 120 by timer recording or the like. Further, it is assumed that when the recorded program file data is reproduced, the following operation is performed. First, by operating a navigation key (not shown) provided on the operation device 22, a list of recorded program files is read from the hard disk 120 and displayed on the display 200 as a menu, and a desired program file is displayed from the displayed menu. The user operates the predetermined key of the operation device 22 to search and select and specify. Next, when the user operates the reproduction key 221 of the operation device 22, the data of the selected program file is read from the hard disk 120 and displayed on the display 200.

  Further, it is assumed that the video recording / reproducing apparatus 100 shifts to a time shift state when the power is turned on. Here, the time shift state means that a predetermined area on the disk 120 of the hard disk device 12 is reproduced by the read head 12R while recording the program data by the television broadcast received via the tuner 11 with the write head 12W. The state where is performed. The predetermined area for the time shift state is a data temporary storage area provided separately from the area for recording the program file, and is referred to as a time shift buffer here.

  Referring to FIG. 3, in the present embodiment, the recording area AR is used as a time shift buffer when explaining the time shift state, and in the state of recording / reproducing program data in timer recording or the like, the recording area AR is recorded. It is used as an area for program files.

  In FIG. 3, the address PT <b> 0 indicates the storage address of the most recently recorded data (oldest data) in the data group recorded in the area AR. The address PT1 indicates an address corresponding to the reproduction position RP indicating the current reproduction position by the reproduction head 12R in the area AR. The address PT2 indicates an address corresponding to a position where data is currently being recorded by the recording head 12W. Data reading is basically performed in the direction indicated by the arrow 300 in accordance with the order of data recorded from the previously recorded data to the most recently recorded data, that is, in chronological order.

  Here, in order to simplify the explanation, it is assumed that data is recorded / read in time series according to the order of input (reception) according to the direction of the arrow 300, but the present invention is not limited to this. In other words, the time series relationship between the data may be maintained while the data is randomly recorded in the area AR. In this case, the recording / reading direction is not one direction as shown by the arrow 300, but the order according to the time series between the data is maintained, so that the data reading is performed more recently than the previously recorded data. Can be executed according to the order of the data recorded in. Note that it is assumed that the data in this time series order is held in a management area (not shown) different from the area AR of the hard disk 120.

  When the area AR is a time shift buffer, the address PT2 is a position where the currently received video data (live data) is recorded by the recording head 12W while being read by the reading head 12R (hereinafter referred to as a live point LP). Show). Therefore, in this case, the write head 12W is located at the live point LP, and the read head 12R is located in the vicinity thereof. This state is called a live state. In addition, the recording head 12W records the currently received video data (live data) at the address PT2, while the reading head 12R reads (reproduces) at a reproduction position RP that is not near the live point LP. Can also be taken. This is called a chasing playback state.

  Since the time shift buffer is used as a so-called ring buffer, when data is written in the addresses PT0 to PT2 of the time shift buffer, the addresses PT2 and PT0 of the live point LP are adjacent to each other. There is a relationship.

  In the present embodiment, the video displayed on the display 200 by the system control circuit 10 is a video of data read from the time shift buffer in the chasing playback state or live state, or a program file recorded by timer recording or the like. Assume that it is an image of read data.

  Here, the operation according to the present embodiment will be described with reference to FIG. First, it is assumed that the read head 12R is located at the address PT0 of the time shift buffer when the video recording / reproducing apparatus 100 is powered on. Further, it is assumed that the control flag FL has been reset and the data POD has a predetermined initial value.

  When the power is turned on, first, the time shift state is set, so that the time shift buffer is in a state where data is written. An image is displayed on the display 200 (step S (hereinafter simply referred to as S) 1). At this time, the system control circuit 10 determines (detects) whether or not any key operation is performed on the operation device 22 (S3). As a result of the determination, if no key operation is performed, the video display is continued. If any key operation is performed, it is determined whether or not it is an operation of the reproduction key 221 (S5).

  If it is determined that the operation is not an operation of the reproduction key 221 (NO in S5), the process proceeds to S13 described later. When it is determined that the reproduction key 221 has been operated (YES in S5), the system control circuit 10 gives the OSD image generation circuit 19 data of a predetermined message to instruct the creation of image data, and inputs to the selector 18 The side is switched to the OSD image generation circuit 19 side. The OSD image generation circuit 19 creates and outputs image data DC of the instructed message. The output image data DC of the message is displayed on the display 20 via the selector 18 (S7).

  An example of the screen display at this time is shown in FIG. When the message 201 by the image data DC in FIG. 4 is displayed, the current video display is interrupted to the user, and the data group corresponding to the video (the data group recorded in the time shift buffer or being reproduced) Of the data group in the program file) is switched to start playback from the video based on the data recorded most recently.

  After displaying the message 201, the system control circuit 10 instructs the hard disk device 12 to skip the reproduction head 12R located near the reproduction position RP or the live point LP to the position of the address PT0 and move all at once. . As a result, the reproducing head 12R is moved from the current position to the address PT0 all at once in the area AR of FIG. 3, and starts reading data in the direction of the arrow 300 (S9). At this time, the system control circuit 10 detects the address where the read head 12R before the movement is located, overwrites the data POD in the memory 10A, and saves (stores) it.

  The movement of the reproducing head 12R is roughly performed as follows. That is, a mechanism (actuator or the like) (not shown) provided in association with the driving of the reproducing head 12R in the hard disk device 12 is controlled by an instruction from the system control circuit 10, so that the arm to which the reproducing head 12R is attached is As a result, the read head 12R moves on the disk 120. When the reading head 112R completes moving to the position of the most recently recorded data, that is, the address PT0, reading of the recorded data is started from the address PT0 in the direction of the arrow 300 in FIG. The address PT0 of each program file is recorded in advance on the hard disk 120, and the moving destination of the read head 12R is determined by the read address PT0.

  When the movement of the read head 12R is completed, the system control circuit 10 sets a control flag FL for instructing that the read head 12R has been moved to the address PT0 all at once (S10). The control flag FL is stored in the memory 10A.

  Since the completion of head movement is notified from the hard disk device 12 to the system control circuit 10, the system control circuit 10 switches the input side of the selector 18 to the MPEC decoder 17 side. As a result, the data RM read from the area AR of the disk 120 of the hard disk device 12 is decoded by the MPEG decoder 17 and applied to the display 200 via the selector 18 as a video signal DAV. Thereby, a reproduction | regeneration video is displayed on the display 200 (S11). Thereafter, the system control circuit 10 returns to the process of S1 and repeats the subsequent processes in the same manner.

  If the video displayed here is a playback video in a live state, in S9, the recording head 12W is positioned at the live point LP in the area AR, but only the playback head 12R is located near the live point LP at the address PT0. The data will be replayed from there. When the playback video is in the chasing playback state, in S9, while the recording head 12W is positioned at the live point LP in the area AR, only the playback head 12R is moved from the playback position RP to the address PT0 all at once. Data reproduction is started from there.

  On the other hand, if the video to be displayed is a playback video of a program file recorded in advance by timer recording or the like, the area AR corresponds to the recording area of the program file, so that the playback head 12R plays back in S9. The position moves from the position RP to the position of the first recorded data of the program file, that is, the address PT0 of the area AR. At this time, when the timer recording mode of the program file is in effect, in S9, only the reproducing head 12R moves from the current position to the address PT0 while the recording head 12W continues to record at the address PT2. Will do.

  On the other hand, when it is determined that the key operated while displaying the video is not the reproduction key 221 (NO in S5), it is determined whether the operated key is the stop key 222 (S13). When the stop key 222 is operated (YES in S13), it is determined whether or not the control flag FL is set (S15). If it is set (YES in S15), the read head 12R temporarily stops reading and is moved to the address indicated by the data POD, that is, the address located before moving in the process of S9 last time. (S17), reading is started from there and a reproduced video is displayed (S19). Thereafter, the system control circuit 10 returns to the process of S1 and repeats the subsequent processes in the same manner.

  If not the stop key 222 (NO in S13) or the control flag FL is not set (NO in S15), the process proceeds to another process corresponding to the operated key.

  Here, if it is determined that the stop key 222 has been operated in S5 after S7 to S11, the reproducing head 12R moves to the original reproduction position indicated by the data POD. It is also possible to move all at once to the vicinity of the live point LP where the recording head 12W is located and start reading data therefrom.

  Here, although the key for moving the reproducing head 12R all at once to the address PT0 in S9 is the reproducing key 221, it is not limited to this. In other words, the key is not limited to the playback key 221 as long as the key operation is originally disabled in the time shift state, the recorded program file playback state, and the program recording state. . Similarly, the operation key for returning the read head 12R to the original reproduction position is not limited to the stop key 222, and may be the reproduction key 221 instead of the stop key 222, for example.

  When the keys operated in S5 and S13 are the same type of keys as the reproduction key 221, for example, the instruction may be determined according to the mode of the key operation. In other words, when the reproduction key 221 is pressed for a long time in S5, the read head 12R is moved to the address PT0, and when the reproduction key 221 is normally pressed in S13 (when it is not a long pressing operation), the process proceeds to S15. It is also possible to return the read head 12R to the original reproduction position by executing the process.

  As described above, since the video recording / reproducing apparatus 100 is always in the time shift state and the video data is constantly being stored in the time shift buffer, the user who has watched the broadcast program in the live state on the display 200 has thoughtfully recorded the program. Even if a recording request is made suddenly, the contents recorded in the time shift buffer can be used as they are as program file data. Under the background of responding to such demands, the time shift buffer has a relatively large capacity capable of recording data of a broadcasting time of about 180 minutes, for example.

  In the present embodiment, regardless of the size (capacity) of the time shift buffer and the area AR of the program file, as described above, the user only performs a single operation (one-touch operation) on the playback key 221 and the playback head 12R. Can be moved (skip) from the current position to the address PT0 all at once, which is excellent in operability.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a configuration diagram of a video recording / reproducing apparatus according to an embodiment of the present invention. It is a processing flowchart concerning an embodiment of this invention. It is a figure explaining the reproducing position in the recording area which concerns on embodiment of this invention. It is a figure which shows the example of a display of the message which concerns on embodiment of this invention.

Explanation of symbols

  10 system control circuit, 11 tuner, 12 hard disk device, 200 display, 100 video recording / playback device, 120 hard disk, 201 message, 221 playback key, 222 stop key, 12R playback head, 12W recording head.

Claims (9)

A data recording / reproducing apparatus having at least a function of reproducing data including video from a disk-shaped recording medium,
An operation unit having a plurality of keys operated from the outside and inputting an instruction according to the operation of the key;
Reading means for reading data for reproduction from a data group recorded in time series on the recording medium;
When the data is read by the reading means, the operating means is responsive to the input of a predetermined instruction by operating a predetermined key of the plurality of keys, the reading means in the data group Read control means for controlling to start reading from the data recorded the earliest,
Means for notifying that reading is started from the most recently recorded data of the data group when the predetermined instruction is input when data is being read by the reading means;
Writing means for writing given data to the recording medium;
Receiving means for receiving a broadcast signal;
Data extraction means for extracting data based on a signal of a desired program broadcast from the broadcast signal received by the reception means and outputting the data to the writing means;
The read control means includes
While the data for the data group is written by the writing means, the reading means is controlled to read data from the data group,
The data group is written to the predetermined area of the recording medium by the writing means,
The predetermined area is either a recording area for recording and storing the data group or a temporary storage area for temporarily storing the data group;
The read control means includes
When the predetermined area is the recording area, while the data is recorded in the recording area by the writing means, the reading means controls to read data from the recording area, and when the data is the temporary storage area , While the data is stored in the temporary storage area by the writing means, control to read data from the temporary storage area by the reading means,
When the recording medium has the temporary storage area and a recording area for recording and storing data, data is written to the temporary storage area by the writing means except when data is written to the recording area. Data recording / reproducing device to be written. A data processing apparatus having at least a function of reproducing data including video from a disk-shaped recording medium,
An operation unit having a plurality of keys operated from the outside and inputting an instruction according to the operation of the key;
Reading means for reading data for reproduction from a data group recorded in time series on the recording medium;
When the data is read by the reading means, the operating means is responsive to the input of a predetermined instruction by operating a predetermined key of the plurality of keys, the reading means in the data group And a read control means for controlling to start reading from the data recorded most recently. Writing means for writing given data to the recording medium;
The read control means includes
The data processing apparatus according to claim 2, wherein the data is read from the data group by the reading unit while the data for the data group is written by the writing unit.   The data processing apparatus according to claim 3, wherein the data group is written in a predetermined area of the recording medium by the writing unit. The predetermined area is a recording area for recording and storing the data group,
The read control means includes
5. The data processing apparatus according to claim 4, further comprising means for controlling the reading means to read data from the recording area while the data is recorded in the recording area by the writing means. The predetermined area is a temporary storage area for temporarily storing the data group,
The read control means includes
5. The data processing apparatus according to claim 4, further comprising time shift means for controlling the reading means to read data from the temporary storage area while the data is stored in the temporary storage area by the writing means. The recording medium has the temporary storage area and a recording area for recording and storing data,
The data processing apparatus according to claim 6, wherein data is written to the temporary storage area by the writing unit except when data is written to the recording area.   The apparatus further comprises means for notifying that reading is started from the most recently recorded data of the data group when the predetermined instruction is input when data is read by the reading means. 8. The data processing apparatus according to any one of items 7. Receiving means for receiving a broadcast signal;
9. The data extraction unit according to claim 3, further comprising: a data extraction unit that extracts data based on a signal of a desired program broadcast from the broadcast signal received by the reception unit and outputs the data to the writing unit. The data processing apparatus described.

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