JP2007087481A - Reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproducing device capable of eliminating or drastically shortening a reproduction interruption period of time until the reproduction start of next content information caused by the access time to the content information selected for next reproduction during the reproduction of the content information. <P>SOLUTION: As for plurality of pieces of content information including the content information to be reproduced, an optical pickup 12 is controlled to store head part information read from a storage medium 10 and accompanying information in a second buffer memory as a memory means. For reproduction of next content information, it is started from the reproduction of the head part and the accompanying information stored in a second buffer memory 21, and a part after the head part information is read after the storage medium 10 is accessed to search it. Thus, a reproduction interruption period between content information reproduced first and content information to be reproduced next is greatly shortened or eliminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a playback device for a recording medium on which a plurality of pieces of content information are recorded.

  In recent years, music data based on music, that is, music information is compressed and recorded on a disk, and the music information read from the disk is temporarily stored in a memory as a disk device that reads the music information and reproduces the music. A mini disc device (hereinafter simply referred to as MD) that can reproduce music has been put into practical use. For reproduction of a recording medium on which a plurality of content information is recorded, the head portion of one content information and information accompanying the content are temporarily stored in the memory, and the information is stored in the memory when a specific operation is performed. Reading from and playing back.

  Hereinafter, a conventional disk device will be described with reference to the drawings, taking MD as an example. FIG. 5 is an explanatory diagram of a configuration of a conventional disk device, FIG. 5 (a) is a block diagram showing the configuration of the conventional disk device, and FIG. 5 (b) is an explanatory diagram of a memory configuration in the conventional disk device. As shown in FIG. 5 (a), the conventional disk device includes a disk 10 as a recording medium on which information based on sound such as music is recorded as a plurality of pieces of subdivided information, and a disk A disk drive motor 11 that rotationally drives 10, an optical pickup 12 that reads information recorded on the disk 10, and an optical pickup drive means that drives the optical pickup 12 so that the optical pickup 12 can read information on the disk 10. 13, servo control means 16 for controlling the optical pickup driving means 13 so that the optical pickup driving means 13 is driven stably with respect to the optical pickup 12, an RF amplifier 14 for amplifying the output of the optical pickup 12, A signal processing means 15 for demodulating the signal amplified and read out by the RF amplifier 14; Based on the buffer memory 2 for temporarily storing data corresponding to the information obtained by the demodulation of the processing means 15, the memory management means 3 for managing the address of the buffer memory 2, and the data read from the buffer memory 2 According to the information, the decoding means 40 is configured to decode data corresponding to music, and the DA conversion means 41 is configured to convert decoded data corresponding to music, which is an output result of the decoding means 40, into analog sound as sound. Yes.

  In FIG. 5B, 2 is a buffer memory for temporarily storing information recorded on the disk 10, A is an address head position which is the head part of the address of the buffer memory 2, and B is buffer memory 2. The read address position from which the above information is read, C is the write address position to which the information read from the disk 10 is written, and D is the address end position that is the end portion of the address of the buffer memory 2. Here, the address head position A, the read address position B, the write address position C, and the address end position D are set in advance in the memory management means 3 at the time of initial setting.

  The reproducing operation of the conventional disk device configured as described above will be described below. A disk 10 on which information based on sound such as music is recorded is driven by a disk drive motor 11 and rotates at a necessary number of rotations. On the other hand, the optical pickup 12 is controlled in the focus direction and the tracking direction by the servo control means 16 via the optical pickup driving means 13 and accesses the disk 10. Information recorded on the disk 10 is reproduced by accessing the optical pickup 12, amplified by the RF amplifier 14, and then input to the signal processing means 15.

  This information is demodulated by the signal processing means 15, and the data which is the demodulated signal is written on the buffer memory 2 as shown in FIG. 5B, the write address position C set in the memory management means 3. Is written at the address indicated by. Here, the write address position C is incremented every time data is written to the buffer memory 2, and when the write address position C coincides with the address end position D, the memory management means 3 sets the address start position A to the address start position A. Updated. The data written in the buffer memory 2 in this way is read from the address indicated by the read address position B set in the memory management means 3, as shown in FIG. Here, the read address position B is incremented every time data is read from the buffer memory 2. When the read address position B matches the address end position D, the memory management unit 3 updates the read address position B to the address head position A. The The data read from the buffer memory 2 in this way is input to the decoding unit 40, decoded by the decoding unit 40, and then input to the DA conversion unit 41. This data is restored to analog information by the DA conversion means 41 and reproduced as sound such as music.

A conventional disk device that performs the above-described reproduction operation usually has a repeat reproduction function that repeats reproduction of music information that is currently being subdivided from the disk 10, a skip-up / down function, and the like. . Of these functions, the repeat playback function reads the last part of the information of the target song (in this case, the song being played back) that is the target of repeat playback from the memory 2 once. 2 is cleared, the beginning of the repeat target song is accessed on the disk 10, data is again written to the buffer memory 2 from the start of the repeat target song, and playback is started again. The skip-up / down function clears the contents of the buffer memory 2 once the playback song number is selected by the skip-up / down instruction, and displays the beginning of the target song that is the playback song number selected on the disk 10. This is realized by a method of accessing, writing data from the beginning of the selection target song to the buffer memory 2 again, and starting reproduction again.
In addition, even if the songs are not physically arranged in the order of the songs, there has been proposed a disc playback device that can perform the last position play with less sense of incongruity (see Patent Document 1).
Japanese Patent Laid-Open No. 7-121930

  However, with the conventional playback method using the disk device as described above, during repeat playback, the target song is accessed on the disc from the end of the song being played until the beginning of the repeat target song is played back. There was a problem that music playback was interrupted for a necessary time. Also, when the skip up / down function is executed, music is played for the time required to access the target song on the disc from the start of the skip up / down function until the target song selected by skip up / down is played. Had the problem of being interrupted.

  Therefore, if the recording medium is directly accessed for each reproduction, the reproduction is scheduled to be performed next to the content information being reproduced in consideration of the fact that the reproduction may be delayed significantly. There is a problem to be solved in that a part of the content information is read out in advance and can be reproduced quickly.

  In view of the above-described conventional problems, an object of the present invention is to disc to target content information (specific segmentation information) that is selected to be reproduced next during reproduction of content information, such as during the operation of the above-described function. By providing a playback device capable of shortening the playback interruption period caused by the access time above and significantly reducing the time until the start of playback of the next content information (next segmentation information) is there.

  Another object of the present invention is to shorten the playback interruption time of the target content information selected for the next playback during playback, such as during the operation of the above function, and to change the title of the song, artist name, etc. It is to provide a playback device for displaying.

  Furthermore, another object of the present invention is not limited to music, but when reproducing a recording medium (eg, DVD or HDD) in which content information of video information and audio information and accompanying information accompanying the content information are recorded. In the operation of the above function, the playback time of the content information selected for the next playback is shortened, and the playback device for displaying the accompanying information of the target content is provided.

  In order to solve the above-described problems, a playback apparatus according to the present invention includes a content information reading unit that reads arbitrary content information from a recording medium on which a plurality of content information is recorded, and a memory that stores the read content information Control means for controlling reproduction of the content information by controlling operations of the content information reading means and the memory means, and the control means controls the reading means for a plurality of the content information. Then, the respective head portion information and accompanying information read from the recording medium are stored in the memory means, and the reproduction of the content information to be reproduced next is the head portion of the content information stored in the memory means. It consists of starting with the reproduction of information and the accompanying information.

  According to this playback apparatus, for a plurality of pieces of content information, the reading means is controlled to read out the head part information and the accompanying information of the contents information from the storage medium, and the read head part information and the accompanying information are stored in the memory. In the reproduction of the content information to be reproduced next to the content information being reproduced, the head stored in the memory means is not read out after searching on the recording medium. Start with playback of partial information and accompanying information. Accordingly, it is possible to greatly reduce or substantially eliminate the interruption of reproduction that may occur between the previously reproduced content information and the content information to be reproduced next.

  In this playback apparatus, the plurality of pieces of content information may be the content information immediately before and after the content information being played back based on a user-specified order such as a recording date / time order or a scheduled broadcast program broadcast date / time order. Can do. When the reproduction order of the plurality of contents recorded on the recording medium is made the same as the stored order, it is preferable that the continuous content information is read in the order and stored in the memory means. In addition, when recording a scheduled broadcast program, the scheduled broadcast program can be reproduced in the order of broadcast if the broadcast date and time are recorded. In addition, the user can also specify the playback order for a specific theme.

  The playback apparatus includes content information skip means for giving a skip instruction for skipping the content information to be played back, and the control means stores in the memory means based on the skip instruction by the content information skip means. The reproduction of the related content information to be reproduced next can be started from the content information that has been reproduced. When the playback apparatus includes content information skip means, when there is a skip instruction given by operating the content information skip means during playback, the read means reads the content information to be skipped from the recording medium. It starts from the reproduction of the head part information of the content information stored in the memory means and the accompanying information. The skip instructions do not need to be in a continuous order, but are arbitrary, such as a skipping order or an irregular order.

  In the reproducing apparatus, the control unit reads information on a subsequent portion of the head part information of the content information that has been started to be played from the recording medium by the reading unit, and stores the information in the memory unit. Subsequent to the reproduction of the partial information, the information of the subsequent portion can be read from the memory means and reproduced. The information stored in the memory means is only the head part information in addition to the accompanying information, and the information following the head part information is recorded on the recording medium. Since the length of reproduction of the head part information is determined so as to give the reading means time to access the recording medium, information on the subsequent part of the content information started with the head part information is stored in the recording medium. The recorded content information can be read out and stored in the memory means, and the stored information of the subsequent portion can be read out from the memory means and can be reproduced seamlessly following the reproduction of the head part information. In addition, since the storage of the information of the subsequent portion may require a larger storage capacity than the storage of the head portion information, the head portion information and the like are stored within the same memory means. It is preferable to prepare a dedicated one different from the one used, or to consider the internal capacity classification even with the same memory means.

  In the above playback device, the control means causes the memory means to respond to the start of playback of the content information by playback of the head part information and the accompanying information stored in the memory means. It is preferable to update the head part information and the accompanying information of the content information to be stored. When the reproduction of the next content information is started, the head part information including the order of the content information stored in the memory means and the information of the accompanying information are in an old state. Therefore, it is preferable to update the information stored in the memory means to prepare for the reproduction of the next content information.

  The playback apparatus may include a display unit that displays the content of the accompanying information. That is, when the content information is information related to music, the accompanying information such as the title and artist name can be stored in a small amount of memory, and can be accurately displayed on the display unit even during high-speed playback.

As described above, in the present invention, in a playback device for a recording medium on which a plurality of pieces of content information such as video information and music information are recorded, the user performs a skip operation on the content information being viewed. Thus, the interruption of reproduction that has conventionally occurred at the time of switching between reproductions of content information can be greatly reduced or substantially eliminated, so that desired content information can be reproduced at high speed without stress.
In addition, as described above, although the amount of data including video information, audio information, and accompanying information is large, the information amount of the head part information and the accompanying information is determined by the reading means to the predetermined content information on the recording medium. Since the amount of information reproduced in the time required for access is sufficient, the buffer memory to be prepared for storing the head part information and the accompanying information can be processed with a small storage capacity.
Further, in the case where the playback apparatus is a device that handles data composed of voice (music) information and accompanying information, even if the user is skipping the reproduced voice (music), the desired voice (music) It is possible to expect an unprecedented effect in that the playback and accompanying information (such as music title and artist name) and output (display) can be played at high speed with a small amount of memory.

  FIG. 1 is a block diagram showing an embodiment of a playback apparatus according to the present invention. FIG. 2 is a diagram for explaining the outline of a recording method such as a DVD or HDD as a recording medium. FIG. 3 shows a memory map of the memory used in the playback apparatus according to the present invention. FIG. 4 is a flowchart for explaining the operation of the playback apparatus according to the present invention.

  The playback device shown in FIG. 1 is a playback device that mainly uses a DVD, HDD, or the like as a recording medium, plays back video information and audio information as content information, or plays back accompanying information accompanying the above information. Further, as a playback apparatus, although not shown in the embodiment, a playback apparatus that plays back audio information that does not include video information and accompanying information that accompanies it, for example, a portable type that includes means for displaying music information on a display unit A music player is also included.

  In the reproducing apparatus shown in FIG. 1, 10 is a recording medium such as a DVD or HDD, 11 is a servo (spindle) motor, 12 is an optical pickup, 13 is an optical pickup driving means, 18 is a servo control means, 14 is an RF amplifier, 15 Is signal processing means, 16 is first buffer memory, 21 is second buffer memory, 17 is DMUX, 40 is audio decoding (decoding) means, 41 is audio DA conversion means, 42 is video decoding (decoding) means, 43 Is a video DA conversion means, 22 is a character information conversion means, 23 is a character information signal output, 24 is a synthesis means, 19 is an operation unit, and 20 is a CPU. The optical pickup 12, the optical pickup driving means 13, and the servo control means 18 constitute a reading means.

  The playback operation of the playback device configured as described above will be described. The content information recorded on the recording medium 10 includes a plurality of content information such as music live, PV (promotion video), a movie composed of a plurality of short stories, information recorded on a plurality of programs, and the like. The target of the reproduction operation is the recording medium 10 on which these pieces of content information are recorded. The recording specifications of video recorded on the recording medium 10 include MPEG1, MPEG2, and MPEG4 (collectively referred to as “MPEG”) as compression encoding (also simply referred to as “encoding”). Encoding (also simply referred to as “encoding”) is encoded in LAYER I, LAYER II, or LAYER III mode based on the MPEG specification.

  Information accompanying the video information and audio information is described in the packet of the stream. The encoded video information, audio information, and accompanying information are multiplexed as a stream (bit string) and synchronized (time division multiplexing) and recorded on the recording medium 10. There are two types of stream recording: a system called PS (Program Stream) in which a single program is configured as a packet and a system called TS (Transport Stream) in which a plurality of programs are configured as a packet. MPEG1 adopts PS system. MPEG2 is compatible with multiple PS and TS. The playback apparatus according to the present invention is not limited to the above-described PS and TS programs because all streams recorded on the recording medium 10 have a packet structure.

  Hereinafter, the operation of the playback apparatus will be described in detail. The recording medium 10 is rotationally driven by the spindle motor 11 at a predetermined rotational speed. The optical pickup 12 is controlled in the focus direction and the tracking direction by the servo control means 18 through a closed loop formed together with the optical pickup driving means 13 and the RF amplifier 14, and is a stream (hereinafter simply referred to as a packet stream) formed from the recording medium 10. (Referred to as “stream”) is read out for each access unit and amplified by the RF amplifier 14. The stream is demodulated by the signal processing means 15 for modulation performed for error correction or the like at the time of recording.

  The demodulated stream signal is stored in the first buffer memory 16. In the first buffer memory 16, the stream signal is stored based on a unit called an access unit. The stream input from the first buffer memory 16 is separated into audio information, a video signal, and accompanying information by the DMUX 17. The audio information is decoded or converted by the audio information decoding means 40, the video information is decoded by the video information decoding means 42, and the meta information as the accompanying information is decoded or converted by the character information converting means 22, respectively. Audio information and video information are reproduced synchronously based on information called a time stamp that is provided in a stream. The decoded audio information is output as an analog audio signal by the audio DA converter 41. The decoded video information is output to the synthesizing unit 24 as an analog video signal by the video DA converting unit 43, and is combined with the character information signal output 23 to be a video output. The synthesizing unit may perform digital synthesis with the character information after the video information is decoded by the decoding unit. The series of reproduction processing described above is controlled by the CPU 20.

  Next, how the above-described stream (bit string) is recorded on the recording medium 10 will be briefly described with reference to FIG. 2A is an external view of a recording medium, FIG. 2B is a schematic diagram of a packet configuration recorded in the data area by the PS method, and FIG. 2C is a schematic diagram of a packet configuration recorded in the data area by the TS method. FIG.

  As shown in FIG. 2A, the area on the recording medium 10 is a data area 50 in which a stream, which is information such as video information, audio information, and accompanying information, is recorded, and the type and recording method of the recording medium are managed. It is roughly divided into a file area 51 for recording information. As shown in FIG. 2B, the first packet of the packet structure recorded in the data area 50 by the PS method is a pack header 53, a system header 54, and a packet 55 (hereinafter, packets 55n are arranged) as one pack. The next pack starts with the pack header 56 and is followed by a pack of packets 57 (hereinafter, packets 57n are arranged), and the packs in which the pack header 56 and the packets 57 (n) are paired are continuously recorded. . In the accompanying information defined in the present invention, a packet (program stream map) in which the accompanying information is described is recorded for each content information. The address of the data area 50 where the packet in which the program street map is described is recorded in the file area 51.

  As shown in FIG. 2 (c), the packet structure recorded in the data area 50 by the TS method is a series of 188-byte transport packets 60, 62, 63, 64 (and so on). Is recorded. A stream attribute called PID (Packet Identification) is added to each packet. In TS recording, accompanying information of content information can be known by PID. If this TS is a digital broadcast record, program information (EPG) can be known. Therefore, for each content information, the address of the data area 50 where the PID packet in which the accompanying information is described is recorded in the file area 51.

  When reproducing arbitrary content information, the servo control means 18 uses the control signal of the CPU 20 to send the head portion of the currently reproduced content information and the content information recorded before and after the currently reproduced content information. Is read from the file area 51, and the signal processing means 15 accesses the address at the beginning of each piece of content information and reads m access units. The read data of the access unit is stored in the second buffer memory 21.

  FIG. 3 shows a memory map of the second buffer memory 21. FIG. 3 shows data (m access units from the head portion) that is the head portion information (including accompanying information; hereinafter, the same unless otherwise specified) of the currently reproduced content information. 21 addresses AAAA to BBBB are stored in memory. The data (m access units from the head portion) of the content information immediately before the content information currently being played back is stored in the DDDD from the address CCCC of the second buffer memory 21. Similarly, the data (m access units from the head part) which is the head part information of the next content information indicates a state where the data is stored in the second buffer memory 21 from the address EEEE to FFFF. Here, m access units are defined as the CPU 20 reads out desired content information from the optical pickup 12 by the servo control means 18 and the optical pickup driving means 13, and the audio DA conversion means 41 and the video DA conversion means 43. This is the number of access units corresponding to the time required to give a slight margin to the time required for reproduction as audio output and video output. Although it is desirable that this time is short, it is usually sufficient to be around 10 seconds.

  When the operation unit 19 performs an operation (skip instruction) for skipping the content being played back during playback of the content information, for example, an operation of skipping the content information currently being played back and playing back the previous content is performed. If it is input to the CPU 20, the CPU stops the reproduction of the current content information, and reads data (address CCCC to DDDD) that is the content information stored in the second buffer memory 21. The read data is input to the DMUX 17, and as described above, audio is output as audio via the audio decoding means 40 and audio DA conversion means 41, and video information is output via the video decoding means 42 and video DA conversion means 43. The video is output and input to the synthesizing means 24. The accompanying information is converted and output via the character information converting means 22 and the character information signal output 23, and is synthesized by the synthesizing means 24 into the video signal. Here, reproduction of a recording medium on which video information, audio information, and accompanying information associated therewith are recorded is handled. Specifically, the video information is an image, and the accompanying information corresponds to character information. . When audio information is handled, accompanying information may be included, but image information is not included.

  On the other hand, the CPU 20 controls the servo control means 18 and the optical pickup driving means 13 to read the position of the content information in which the previous content information is recorded from the optical pickup 12 from the file area 51 and Data read by accessing the (m + 1) th access unit from the first access unit is stored in the first buffer memory 16 via the RF amplifier 14 and the signal processing means 15. The CPU 20 outputs the data in the second buffer memory 21 (m access units from the address CCCC to DDDD) and then the data in the first buffer memory 16 (m + 1 and subsequent access units, that is, after the head part information). Information on the part of). A video signal and audio signal read out and reproduced from the second buffer memory 21 by a time management tag of decoding (decoding) reproduction processing called a time stamp in the header of the packet constituting the access unit, and the first The video signal and audio signal read out and reproduced from the buffer memory 16 are reproduced with time inheritance seamlessly.

  Further, the CPU 20 recognizes the data (address CCCC to DDDD) in the second buffer memory 21 described above as m access units from the beginning of the content information currently being reproduced, Data (address AAAA to BBBB) is recognized as m access units from the head of the content information immediately after the content information currently being reproduced. Next, the CPU 20 reads from the file area 51 the position of the content information in which the content information immediately before the content information that is being newly reproduced is recorded, and extracts m items from the head access unit of the content information. The information is read by the optical pickup 12 and stored in the second buffer memory 21 (address EEEE to FFFF) via the RF amplifier 14 and signal processing means, and the CPU 20 stores the data (address EEEE to FFFF) that is currently being reproduced. Are recognized as m access units (head portion information) from the head portion of the immediately preceding content information. At this time, the previously stored data (addresses EEEE to FFFF) is discarded, erased, or rewritten by overwriting.

  The above-described memory update method is merely an example, and other updates (sequential advance based on designation by the user, such as sequentially advance addresses already stored in the memory) can be performed. In addition, it is conceivable to store the first partial information of all the content information recorded in advance in the recording medium 10 in the second buffer memory 21, but this technique requires a large memory capacity in the second buffer memory 21. Become. In the present invention, with respect to the content information being reproduced and the content information before and after the content information, only the partial information such as the head part information and the accompanying information is stored in the second buffer memory, so the memory capacity of the second buffer memory is increased. Without resolving these issues. In addition, the first buffer memory 16 and the second buffer memory 21 are memory means in the present invention, and are described in two parts for easy understanding, but may be configured by one memory. Is possible.

  Next, the above-described series of operations will be described in detail using the flowchart of FIG. When the user (user) attaches the recording medium 10 (see FIG. 1 or FIG. 2; the same applies hereinafter) to the reproducing apparatus and instructs the reproducing operation from the operation unit, the reproducing apparatus first selects the optical pickup 12 as the recording medium. The content information instructed by the user is retrieved from the ten file areas 51, information on the head part of the content information in the data area 50 is acquired (S10), and stored in the second buffer memory 21 (S11). Similarly, information on the head part of the immediately preceding content information to be reproduced is acquired (S10) and stored in the second buffer memory 21 (S11). Similarly, the next information to be reproduced is acquired (S10) and stored in the second buffer memory 21 (S11).

  When the storage procedure is completed, the CPU reproduces the content information instructed by the user of the recording medium 10 (S12). In parallel, the CPU 20 reads the content information after the head portion of the content information to be reproduced from the recording medium 10 from the optical pickup 12 and outputs it to the first buffer memory 16 (S19). When the CPU 20 reads the information (data) being read from the second buffer memory 21 in S12 and the reproduction is completed, the CPU 20 and the subsequent portions stored in the first buffer memory 16 read from the recording medium 10 are used. The information is time-synchronized (synchronized) with a time stamp (S18), and the information is continuously reproduced without interruption (S12). In the playback state, when the user issues a skip instruction (up / down) of the content information currently being played from the operation unit of the playback device (S13), the CPU 20 determines the content information currently being played back based on the skip instruction. The reproduction is stopped, the designated content information is read from the second buffer memory 21, and the head portion is reproduced (S17). In parallel, the CPU 20 retrieves the content information before or after the skip-designated content information from the file area 51 of the recording medium 10 and acquires the head portion of the content information from the data area 50 ( S14). The acquired information (data) is stored in the second buffer memory 21. At this time, since the previous data remains, the second buffer memory 21 is updated using the above-described method (S15). When the update of the second buffer memory 21 is completed, the CPU 20 reads the content information after the head portion of the content information specified by the user from the optical pickup 12 from the recording medium 10 and outputs it to the first buffer memory 16 (S16). . When the CPU 20 reads the information (data) being read from the second buffer memory 21 in S17 and the reproduction is completed, the CPU 20 starts from the first portion stored in the first buffer memory 16 read from the recording medium 10 described above. The information is timed (synchronized) with a time stamp (S18), and the information is continuously reproduced without interruption (S12).

The block block diagram of the reproducing | regenerating apparatus by this invention. FIG. 3 is an explanatory diagram of a recording method of a recording medium used in a reproducing apparatus according to the present invention, a stream configuration (PS) used for describing the present invention, and a stream configuration (TS) used for describing the present invention. The memory map of the memory used for the reproducing | regenerating apparatus by this invention. The flowchart explaining operation | movement of the reproducing | regenerating apparatus by this invention. The block block diagram which shows an example of the conventional reproducing | regenerating apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Recording medium 11 Spindle motor 12 Optical pick-up 13 Optical pick-up drive means 14 RF amplifier 15 Signal processing means 16 1st buffer memory 17 DMUX
18 Servo control means 19 Operation unit 20 CPU
21 Second buffer memory 22 Character information conversion means 23 Character information output 24 Composition means 40 Audio decoding means 42 Video decoding means 41 Audio DA conversion means 43 Video DA conversion means 50 Data area 51 File area

Claims (6)

Content information reading means for reading arbitrary content information from a recording medium recording a plurality of content information, memory means for storing the read content information, and operation of the content information reading means and the memory means Control means for controlling the reproduction of the content information by controlling
The control means controls the reading means for a plurality of pieces of the content information, stores the respective head part information and accompanying information read from the recording medium in the memory means, and reproduces the content information to be reproduced next. Starting from the reproduction of the head part information and the accompanying information of the content information stored in the memory means.   The plurality of pieces of content information are the pieces of content information immediately before and after the content information being reproduced based on a user-specified order such as a recording date / time order or a scheduled broadcast program broadcast date / time order. Playback device. The playback device includes content information skip means for giving a skip instruction for skipping the content information to be played back,
2. The control unit according to claim 1, further comprising: starting reproduction of the content information to be reproduced next out of the content information stored in the memory unit based on the skip instruction by the content information skip unit. The reproduction apparatus according to 1 or 2.   The control means reads the information of the subsequent portion of the head part information of the content information that has been started to be read from the recording medium by the reading means, stores it in the memory means, and continues the playback of the head part information. 4. A reproducing apparatus according to claim 1, wherein the information of the subsequent portion is read from the memory means and reproduced.   In response to the start of reproduction of the content information by reproduction of the head part information and the accompanying information stored in the memory unit, the control unit is configured to store the content information to be stored in the memory unit. 5. The reproducing apparatus according to claim 1, further comprising updating the head part information and the accompanying information.   The playback apparatus according to claim 1, further comprising a display unit that displays the content of the accompanying information.